Data Package Metadata View Summary

Water column and sediment porewater nutrient concentrations from lagoon, river, and ocean sites along the Alaska Beaufort Sea coast, 2018-ongoing

General Information

Data Package:

Local Identifier:

knb-lter-ble.14.15

Title:

Water column and sediment porewater nutrient concentrations from lagoon, river, and ocean sites along the Alaska Beaufort Sea coast, 2018-ongoing

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

Several water types (lagoon, river, ocean) and surface sediment porewater from the coastal Beaufort Sea system are sampled seasonally to investigate temporal and spatial shifts in nutrient dynamics. Surface and bottom water samples, and surface sediment samples are collected during full ice cover (April), ice break-up (mid-June to early July), and open water (late July and August) periods, and analyzed for ammonia (2018-2019) or ammonium (2021 on), nitrate + nitrite, orthophosphate, and silicate concentrations.

Short Name:

nutrient

Publication Date:

2023-09-07

Language:

English

For more information:
Visit:	https://ble.lternet.edu
Visit:	DOI PLACE HOLDER

Time Period

Begin:

2018-07-23

End:

2022-08-09

People and Organizations
Contact:	Information Manager (Beaufort Lagoon Ecosystems LTER) [ email ]
Organization:	Beaufort Lagoon Ecosystems LTER, Core Program
Associate:	Hardison, Amber K (Virginia Institute of Marine Science, investigator)
Associate:	Kim, Brian S (Virginia Institute of Marine Science, field and lab technician)
Associate:	Plumb, Kaylie H (The University of Texas at Austin, field and lab technician)
Associate:	Roberts, Quinn N (Virginia Institute of Marine Science, field and lab manager)
Associate:	Bonsell, Christina E (The University of Texas at Austin, field and lab technician, Core Program manager)
Associate:	McTigue, Nathan D (The University of Texas at Austin, Core Program manager)
Associate:	Hladyniuk, Ryan (The University of Texas at Austin, lab technician)
Associate:	Nguyen, An T (The University of Texas at Austin, information manager)
Associate:	Whiteaker, Timothy L (The University of Texas at Austin, information manager)

Data Entities
Data Table Name:	Water column nutrient data
Description:	Concentrations of ammonia or ammonium, phosphate, silicate, and nitrate+nitrite from aquatic and marine waters along the Beaufort Sea Alaska, BLE LTER Core Program, 2018-ongoing
Data Table Name:	Sediment porewater nutrient data
Description:	Concentrations of ammonia or ammonium, phosphate, silicate, and nitrate+nitrite from sediment porewater along the Beaufort Sea Alaska, BLE LTER Core Program, 2018-ongoing
Data Table Name:	Chemistry analysis information
Description:	Information on laboratory chemistry analyses
Data Table Name:	Water column and sediment nutrient data, personnel list
Description:	Personnel list with years involved in this data set

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-ble/14/15/3983d2a3c44e301acb6d4d37af38e525
Name:	Water column nutrient data
Description:	Concentrations of ammonia or ammonium, phosphate, silicate, and nitrate+nitrite from aquatic and marine waters along the Beaufort Sea Alaska, BLE LTER Core Program, 2018-ongoing
Number of Records:	362
Number of Columns:	22

Table Structure

Object Name:

BLE_LTER_nutrient_water_column.csv

Size:

77842 byte

Authentication:

9d7a4df14e4ca81920510433200ad1b6 Calculated By MD5

Character Encoding:

UTF-8

Text Format:

Number of Header Lines:

Number of Foot Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Station node

Station lagoon

Station

Sampling season

Date time

Water column position

Replicate number

ammonia or ammonium concentration

Phosphate concentration

Silicate concentration

Nitrate + Nitrite concentration

Flag for ammonia or ammonium concentration

Flag for phosphate concentration

Flag for silicate concentration

Flag for nitrate + nitrite concentration

Notes

Collection method

Station name

Latitude

Longitude

Habitat type

Station sampling priority

Column Name:

node

lagoon

station

season

date_time

water_column_position

rep

ammonium_umol_N_L

phosphate_umol_P_L

silicate_umol_SiO2_L

nitrate_nitrite_umol_N_L

flag_NH3

flag_PO4

flag_SiO2

flag_NO23

notes

collection_method

station_name

latitude

longitude

habitat_type

station_sampling_priority

Definition:

One of three research nodes in BLE LTER's research program

Lagoon where BLE LTER Core Program station is located

BLE LTER Core Program station code

BLE LTER Core Program sampling season

Date and time sample was collected, in ISO 8601 format YYYY-MM-DDThh:mm:ss-hh. Noon local time (AKDT in most cases) is used as a placeholder when times were not recorded (e.g. 2021 and prior).

Where sample was taken within water column

Replicate number. 1 or 2 if replicate samples were analyzed, 1 if no reps were taken, and NA for when this wasn't reported

Ammonia or ammonium concentration in micromoles N per liter

Phosphate concentration in micromoles P in liter

Silicate concentration in micromoles SiO2 per liter

Nitrate + Nitrite concentration in micromoles N per liter

Flag for ammonia or ammonium concentration

Flag for phosphate concentration

Flag for silicate concentration

Flag for nitrate + nitrite concentration

Notes

How water was collected in the field

BLE LTER's Core Program station name

Latitude in decimal degrees. Note that due to field conditions, sampling is not always carried out at these exact coordinates, but in close vicinity of the station. Coordinates based on WGS84 datum.

Longitude in decimal degrees. Note that due to field conditions, sampling is not always carried out at these exact coordinates, but in close vicinity of the station. Coordinates based on WGS84 datum.

Habitat type (river, lagoon, ocean)

BLE LTER Core Program station sampling priority. For internal use.

External Measurement Definition, Link:

containsMeasurementsOfType dissolved ammonium concentration,
containsMeasurementsOfType dissolved ammonia concentration

containsMeasurementsOfType dissolved phosphate concentration

containsMeasurementsOfType dissolved silicate concentration in water

containsMeasurementsOfType nitrate and nitrite concentration in water

Storage Type:

string

dateTime

string

integer

decimal

string

decimal

string

Measurement Type:

nominal

dateTime

nominal

ordinal

ratio

nominal

interval

nominal

Measurement Values Domain:

Definition

any text

Definition

any text

Definition

any text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	under ice
Definition	Sampling occurred in winter season (e.g. April) when the lagoons are mostly frozen.
Source

Code Definition

Code	break up
Definition	Sampling occurred in spring season (e.g. June) when ice break-up happens.
Source

Code Definition

Code	open water
Definition	Sapling occurred in summer season (e.g. late July/early August) when the lagoons have mostly open water.
Source

Format	YYYY-MM-DDThh:mm:ss-hh
Precision	3600

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	surface
Definition	water collected from approximately 0-30 cm below the surface
Source

Code Definition

Code	bottom
Definition	water collected from approximately 30 cm above the bottom
Source

Definition

any text

Unit	microMolesPerLiter
Type	real
Min	0
Max

Unit	microMolesPerLiter
Type	real
Min	0
Max

Unit	microMolesPerLiter
Type	real
Min	0
Max

Unit	microMolesPerLiter
Type	real
Min	0
Max

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	HIGH
Definition	inaccurately high measured concentration compared to total dissolved nitrogen measurement, likely due to instrument error
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Code Definition

Code	BUBBLE
Definition	bubble during run/data not usable
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Code Definition

Code	BUBBLE
Definition	bubble during run/data not usable
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Code Definition

Code	BUBBLE
Definition	bubble during run/data not usable
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	HIGH
Definition	inaccurately high measured concentration compared to total dissolved nitrogen measurement, likely due to instrument error
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Code Definition

Code	BUBBLE
Definition	bubble during run/data not usable
Source

Definition

any text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	pump
Definition	water was collected using a Geopump fitted with Masterflex tubing
Source

Code Definition

Code	grab
Definition	water was collected directly in a bottle
Source

Definition

any text

Unit	degree
Type	real
Min	-90
Max	90

Unit	degree
Type	real
Min	-180
Max	180

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	lagoon
Definition	Lagoon
Source

Code Definition

Code	ocean
Definition	Ocean
Source

Code Definition

Code	river
Definition	Freshwater river
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	primary
Definition	Lagoon site is primarily sampled during field sampling.
Source

Code Definition

Code	secondary
Definition	Lagoon site is secondarily sampled during field sampling.
Source

Code Definition

Code	river
Definition	River site
Source

Code Definition

Code	ocean
Definition	Nearshore ocean site
Source

Missing Value Code:

Code	not applicable
Expl	Not applicable

Code	NA
Expl	not available/applicable

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	No notes, sample integrity is sound

Code	NA
Expl	not available/applicable

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-ble/14/15/5e945234cbee5e3e6db1ba20a0397d41
Name:	Sediment porewater nutrient data
Description:	Concentrations of ammonia or ammonium, phosphate, silicate, and nitrate+nitrite from sediment porewater along the Beaufort Sea Alaska, BLE LTER Core Program, 2018-ongoing
Number of Records:	151
Number of Columns:	20

Table Structure

Object Name:

BLE_LTER_nutrient_sediment_porewater.csv

Size:

33056 byte

Authentication:

a1c9ddf78810483e7a2bd8381390673a Calculated By MD5

Character Encoding:

UTF-8

Text Format:

Number of Header Lines:

Number of Foot Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Station node

Station lagoon

Station

Sampling season

Date time

Replicate number

ammonia or ammonium concentration

Phosphate concentration

Silicate concentration

Nitrate + Nitrite concentration

Flag for ammonia or ammonium concentration

Flag for phosphate concentration

Flag for silicate concentration

Flag for nitrate + nitrite concentration

Notes

Station name

Latitude

Longitude

Habitat type

Station sampling priority

Column Name:

node

lagoon

station

season

date_time

rep

ammonium_umol_N_L

phosphate_umol_P_L

silicate_umol_SiO2_L

nitrate_nitrite_umol_N_L

flag_NH3

flag_PO4

flag_SiO2

flag_NO23

notes

station_name

latitude

longitude

habitat_type

station_sampling_priority

Definition:

One of three research nodes in BLE LTER's research program

Lagoon where BLE LTER Core Program station is located

BLE LTER Core Program station code

BLE LTER Core Program sampling season

Date and time sample was collected, in ISO 8601 format YYYY-MM-DDThh:mm:ss-hh. Noon local time (AKDT in most cases) is used as a placeholder when times were not recorded (e.g. 2021 and prior).

Replicate number. 1 or 2 if replicate samples were analyzed, 1 if no reps were taken, and NA for when this wasn't reported

Ammonia or ammonium concentration in micromoles N per liter

Phosphate concentration in micromoles P in liter

Silicate concentration in micromoles SiO2 per liter

Nitrate + Nitrite concentration in micromoles N per liter

Flag for ammonia or ammonium concentration

Flag for phosphate concentration

Flag for silicate concentration

Flag for nitrate + nitrite concentration

Notes

BLE LTER's Core Program station name

Latitude in decimal degrees. Note that due to field conditions, sampling is not always carried out at these exact coordinates, but in close vicinity of the station. Coordinates based on WGS84 datum.

Longitude in decimal degrees. Note that due to field conditions, sampling is not always carried out at these exact coordinates, but in close vicinity of the station. Coordinates based on WGS84 datum.

Habitat type (river, lagoon, ocean)

BLE LTER Core Program station sampling priority. For internal use.

External Measurement Definition, Link:

containsMeasurementsOfType dissolved ammonia concentration,
containsMeasurementsOfType dissolved ammonium concentration

containsMeasurementsOfType dissolved phosphate concentration

containsMeasurementsOfType dissolved silicate concentration in water

containsMeasurementsOfType nitrate and nitrite concentration in water

Storage Type:

string

dateTime

integer

decimal

string

decimal

string

Measurement Type:

nominal

dateTime

ordinal

ratio

nominal

interval

nominal

Measurement Values Domain:

Definition

any text

Definition

any text

Definition

any text

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	under ice
Definition	Sampling occurred in winter season (e.g. April) when the lagoons are mostly frozen.
Source

Code Definition

Code	open water
Definition	Sapling occurred in summer season (e.g. late July/early August) when the lagoons have mostly open water.
Source

Code Definition

Code	break up
Definition	Sampling occurred in spring season (e.g. June) when ice break-up happens.
Source

Format	YYYY-MM-DDThh:mm:ss-hh
Precision	3600

Definition

any text

Unit	microMolesPerLiter
Type	real
Min	0
Max

Unit	microMolesPerLiter
Type	real
Min	0
Max

Unit	microMolesPerLiter
Type	real
Min	0
Max

Unit	microMolesPerLiter
Type	real
Min	0
Max

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	HIGH
Definition	inaccurately high measured concentration compared to total dissolved nitrogen measurement, likely due to instrument error
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	NS
Definition	not enough sample volume to obtain accurate measurement
Source

Code Definition

Code	BD
Definition	sample concentration below detection limit
Source

Code Definition

Code	HIGH
Definition	inaccurately high measured concentration compared to total dissolved nitrogen measurement, likely due to instrument error
Source

Code Definition

Code	VALID
Definition	sample concentration within bounds of detection
Source

Definition

any text

Definition

any text

Unit	degree
Type	real
Min	-90
Max	90

Unit	degree
Type	real
Min	-180
Max	180

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	lagoon
Definition	Lagoon
Source

Code Definition

Code	ocean
Definition	Ocean
Source

Code Definition

Code	river
Definition	Freshwater river
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	primary
Definition	Lagoon site is primarily sampled during field sampling.
Source

Code Definition

Code	secondary
Definition	Lagoon site is secondarily sampled during field sampling.
Source

Code Definition

Code	river
Definition	River site
Source

Code Definition

Code	ocean
Definition	Nearshore ocean site
Source

Missing Value Code:

Code	NA
Expl	not available/applicable

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	missing or invalid, see corresponding flag column

Code	NA
Expl	No notes, sample integrity is sound

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-ble/14/15/78bb11ccc883cf86c2d5f0edec5d3063
Name:	Chemistry analysis information
Description:	Information on laboratory chemistry analyses
Number of Records:	12
Number of Columns:	10

Table Structure

Object Name:

BLE_LTER_nutrient_chemistry_analysis_info.csv

Size:

1625 byte

Authentication:

42590cf77aba5cbe9277a50f04fafb98 Calculated By MD5

Character Encoding:

UTF-8

Text Format:

Number of Header Lines:

Number of Foot Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Chemistry

Year samples were taken

Sample type

Unit

Reaction

Wavelength

Detection limit

Applicable range

Sample precision

Number of replicates

Column Name:

chemistry

year

sample_type

unit

reaction

wavelength_nm

detection_limit

applicable_range

sample_precision

Definition:

Name of target nutrient

Year samples were collected

Sample type (water column or sediment porewater)

Unit concentrations are reported in

Reaction used

Wavelength used

Detection limit of instrument

Range of instrument

Precision calculated from duplicates

Number of replicates taken to arrive at sample precision

Storage Type:

string

integer

string

integer

Measurement Type:

nominal

interval

nominal

ratio

Measurement Values Domain:

Definition

any text

Definition

any text

Definition

any text

Definition

any text

Definition

any text

Unit	nanometer
Type	integer

Definition

any text

Definition

any text

Definition

any text

Unit	dimensionless
Type	integer

Missing Value Code:

Code	NA
Expl	not available/applicable

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-ble/14/15/cbf1380d13693d1683c05708f9ee4547
Name:	Water column and sediment nutrient data, personnel list
Description:	Personnel list with years involved in this data set
Number of Records:	9
Number of Columns:	8

Table Structure

Object Name:

BLE_LTER_nutrient_personnel.csv

Size:

1131 byte

Authentication:

1d42d10f8ebb39391b49e2b8de453274 Calculated By MD5

Character Encoding:

UTF-8

Text Format:

Number of Header Lines:

Number of Foot Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Data package ID

Given name

Middle name

Surname

Role

Begin year

End year

ORCID

Column Name:

datasetid

givenname

middlename

surname

role

beginyear

endyear

orcid

Definition:

BLE LTER's data package ID

Given name

Middle name or middle initial

Surname or last name

Role in dataset

Beginning year of role in dataset

End year of role in dataset

ORCID

Storage Type:

string

dateTime

string

Measurement Type:

nominal

dateTime

nominal

Measurement Values Domain:

Definition

any text

Definition

any text

Definition

any text

Definition

any text

Definition

any text

Format	YYYY
Precision	1

Format	YYYY
Precision	1

Definition

any text

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This data package is released to the public domain under Creative Commons CC0 1.0 “No Rights Reserved” (see: https://creativecommons.org/publicdomain/zero/1.0/). It may be distributed, remixed, and built upon. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. It is considered professional etiquette to provide attribution of the original work if this data package is shared or utilized in whole or by individual components. A generic citation is provided for this data package on the website of the repository where these data were obtained in the summary metadata page.

Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. The consumer of these data ("Data User" herein) is urged to contact the authors of these data if any questions about methodology or results occur. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplication or inappropriate use. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation may occur if data are used outside of the context of the original study. The Data User should be aware that periodic updates of this data package may be available from the website and it is the responsibility of the Data User to check for new versions of the data.

While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy cannot be guaranteed. This data package (with its components) is made available “as is” and with no warranty of accuracy or fitness for use. The creators of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use or misuse of the data package or its components. Thank you.

External Annotations

With link(s) out to external vocabularies
Dataset isAbout lagoon

Keywords

By Thesaurus:
LTER Core Research Areas	movement of inorganic matter
LTER Controlled Vocabulary v1	ammonia, ammonium, aquatic ecosystems, biogeochemistry, estuaries, nitrate, nitrite, nitrogen, oceanography, oceans, phosphate, porewater, rivers, seawater, sediments, silica, streams
Geographic Names Information System	Avak Creek, Barter Island, Elson Lagoon, Jago Lagoon, Kaktovik, Kaktovik Lagoon, Mayoeak River, Sagavanirktok River, Simpson Lagoon, Stefansson Sound, Utqiagvik
BLE LTER Controlled Vocabulary	Beaufort Lagoon Ecosystems LTER, BLE, BLE LTER Core Program, LTER

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

Water Column Water Chemistry

Water Column Collection: Water samples are collected by hand (near surface “grabs” where bottles are filled directly) or with a peristaltic pump (at various depths). In the latter case, Masterflex C-flex tubing is used. Water is collected in 1 L sample-rinsed high-density polyethylene (HDPE) or polycarbonate bottles in the field and kept near ambient temperatures in a cooler for transportation to the lab. In the lab, nutrient samples (30 mL) are collected into a Whirl-pak bag using a Geotech 0.45 µm high-capacity polyethersulfone (PES) capsule filter connected with Masterflex-C tubing to a Geopump Series II Peristaltic Pump. The filtered water samples are frozen at -20˚C until analysis.

Chemistry Analysis: Dissolved nutrients [ammonia (NH₃) in 2018-2019 or ammonium (NH₄ ⁺) in 2021, nitrate + nitrite (NO_x), orthophosphate (PO₄ ^3-), and silica (SiO₂)] are measured at the Core Facilities Laboratory at The University of Texas Marine Science Institute in Port Aransas, Texas on a continuous flow-analyzer Lachat Quick Chem 8500 (2018-2019), and at the Virginia Institute of Marine Science in Gloucester Point, Virginia on a continuous flow-analyzer FIAlyzer by FIAlab Instruments (2021+).

Sediment Porewater Water Chemistry

Sediment Porewater Collection: Surface sediment (5 – 10 cm depth, depending on substrate) is collected using a PONAR grab sampler and released into a plastic tub. Sediment samples are collected from the surface, transferred into Whirl-pak bags, and frozen at -20˚C. In the lab, ~60 g of wet sediment is placed into each 60 mL Falcon centrifuge tube and centrifuged at 10,000 rpm for 15 minutes. The overlying supernatant is pipetted into a syringe and filtered through a 0.45 µm Puradisc filter into a 30 mL Whirl-pak bag and frozen at -20˚C until analysis.

Chemistry Analysis: Dissolved nutrients [ammonia (NH₃) in 2018-2019 or ammonium (NH₄ ⁺) in 2021, nitrate + nitrite (NO_x), orthophosphate (PO₄ ^3-), and silica (SiO₂)] are measured at the Core Facilities Laboratory at The University of Texas Marine Science Institute in Port Aransas, Texas on a continuous flow-analyzer Lachat Quick Chem 8500 (2018-2019) and at the Virginia Institute of Marine Science in Gloucester Point, Virginia on a continuous flow-analyzer FIAlyzer by FIAlab Instruments (2021+).

Due to the high nutrient levels in porewater samples, it is not uncommon for undiluted NH3/NH4 and SiO2 measurements to read outside the applicable range of the autoanalyzer. In most cases, a dilution factor of 2-40 provides readings within the applicable range for these parameters. PO₄ ^3- and NO_x levels in the undiluted sample usually fall within the applicable range. For diluted samples, the nutrient value in the data files is the final, dilution-corrected version. No additional dilution correction is required.

Data value flag definitions

“BD” = below instrument/method detection limit (see data table "BLE_LTER_nutrient_chemistry_analysis_info.csv" for instrument detection limits)

“NS” = no sample available for analysis

“HIGH” = value exceeds QA/QC limits

"BUBBLE" = bubble during run/data not usable

Sample precision calculation

Sample duplicates are run periodically for sample precision. Precision will be updated continually as more samples are run on the instrument. For sample precision values, see data table "BLE_LTER_nutrient_chemistry_analysis_info.csv". Precision is calculated as the coefficient of variation (CV) of duplicate samples:

CV (%) = (standard deviation / average) * 100%

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@edirepository.org

Web Address:

https://edirepository.org

Id:

https://ror.org/0330j0z60

Creators:

Organization:

Beaufort Lagoon Ecosystems LTER, Core Program

Address:

750 Channel View Dr.,

Port Aransas, TX 78373 USA

Email Address:

BLE-IM@utexas.edu

Web Address:

https://ble.lternet.edu/

Id:

https://ror.org/055a54548

Contacts:

Organization:

Beaufort Lagoon Ecosystems LTER

Position:

Information Manager

Address:

MC R8000 The University of Texas at Austin,

Austin, TX 78712 USA

Email Address:

BLE-IM@utexas.edu

Web Address:

https://ble.lternet.edu/

Id:

https://ror.org/055a54548

Associated Parties:

Individual:

Amber K Hardison

Organization:

Virginia Institute of Marine Science

Address:

College of William & Mary,

Gloucester Point, VA 23062 USA

Phone:

804-684-7779

Email Address:

akhardison@vims.edu

Id:

https://orcid.org/0000-0002-0891-3731

Role:

investigator

Individual:

Brian S Kim

Organization:

Virginia Institute of Marine Science

Address:

College of William & Mary,

Gloucester Point, VA 23062 USA

Email Address:

bskim@vims.edu

Id:

https://orcid.org/0000-0002-0189-0530

Role:

field and lab technician

Individual:

Kaylie H Plumb

Organization:

The University of Texas at Austin

Address:

750 Channel View Dr.,

Port Aransas, TX 78383 USA

Email Address:

kaylie.plumb@austin.utexas.edu

Id:

https://orcid.org/0000-0001-6071-0547

Role:

field and lab technician

Individual:

Quinn N Roberts

Organization:

Virginia Institute of Marine Science

Address:

College of William & Mary,

Gloucester Point, VA 23062 USA

Email Address:

qroberts@vims.edu

Id:

https://orcid.org/0000-0002-9050-2172

Role:

field and lab manager

Individual:

Christina E Bonsell

Organization:

The University of Texas at Austin

Address:

750 Channel View Dr.,

Port Aransas, TX 78383 USA

Email Address:

cebonsell@gmail.com

Id:

https://orcid.org/0000-0002-8564-0618

Role:

field and lab technician, Core Program manager

Individual:

Nathan D McTigue

Organization:

The University of Texas at Austin

Address:

750 Channel View Dr.,

Port Aransas, TX 78383 USA

Email Address:

mctigue@utexas.edu

Id:

https://orcid.org/0000-0002-7686-7095

Role:

Core Program manager

Individual:

Ryan Hladyniuk

Organization:

The University of Texas at Austin

Address:

750 Channel View Dr.,

Port Aransas, TX 78383 USA

Email Address:

r.hladyniuk@austin.utexas.edu

Id:

https://orcid.org/0000-0003-4627-8174

Role:

lab technician

Individual:

An T Nguyen

Organization:

The University of Texas at Austin

Address:

Austin, TX 78758 USA

Email Address:

enthusiast@utexas.edu

Id:

https://orcid.org/0000-0001-6519-0173

Role:

information manager

Individual:

Timothy L Whiteaker

Organization:

The University of Texas at Austin

Address:

Austin, TX 78758 USA

Email Address:

whiteaker@utexas.edu

Id:

https://orcid.org/0000-0002-1940-4158

Role:

information manager

Metadata Providers:

Organization:

Beaufort Lagoon Ecosystems LTER

Address:

750 Channel View Dr.,

Port Aransas, TX 78373 USA

Email Address:

BLE-IM@utexas.edu

Web Address:

https://ble.lternet.edu/

Id:

https://ror.org/055a54548

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2018-07-23

End:

2022-08-09

Geographic Region:

Description:

Barrow (Utqiavik): Bounding box contains Elson Lagoon and nearby river sampling sites. Located in North Slope, Alaska, USA, close to Utqiaġvik (formerly Barrow). Coordinates based on WGS84 datum.

Bounding Coordinates:

Northern:	71.395000	Southern:	71.107110
Western:	-156.603000	Eastern:	-155.914000

Geographic Region:

Description:

Kaktovik: Bounding box contains Jago and Kaktovik Lagoons and nearby river and ocean sampling sites. Located in North Slope, Alaska, USA, close to Kaktovik. Coordinates based on WGS84 datum.

Bounding Coordinates:

Northern:	70.150159	Southern:	70.070734
Western:	-143.776703	Eastern:	-143.241119

Geographic Region:

Description:

Prudhoe Bay: Bounding box contains Simpson Lagoon, Stefansson Sound, and nearby river and ocean sampling sites. Located in North Slope, Alaska, USA, close to Prudhoe Bay. Coordinates based on WGS84 datum.

Bounding Coordinates:

Northern:	70.568803	Southern:	70.190688
Western:	-149.924927	Eastern:	-147.788086

Project

Parent Project Information:

Title:

LTER: Beaufort Sea Lagoons: An Arctic Coastal Ecosystem in Transition

Personnel:

Individual:

Kenneth Dunton

Organization:

The University of Texas at Austin, Marine Science Institute

Phone:

361-749-6744 (voice)

Email Address:

ken.dunton@utexas.edu

Id:

https://orcid.org/0000-0003-3498-8021

Role:

Lead Principal Investigator

Individual:

James McClelland

Organization:

Marine Biological Laboratory

Phone:

508-289-7162 (voice)

Email Address:

jmcclelland@mbl.edu

Id:

https://orcid.org/0000-0001-9619-8194

Role:

Co-Lead Principal Investigator

Individual:

Byron Crump

Organization:

Oregon State University

Email Address:

byron.crump@oregonstate.edu

Id:

https://orcid.org/0000-0001-7062-1273

Role:

Co-Principal Investigator

Individual:

Amber Hardison

Organization:

Virginia Institute of Marine Science, College of William & Mary

Email Address:

akhardison@vims.edu

Id:

https://orcid.org/0000-0002-0891-3731

Role:

Co-Principal Investigator

Individual:

Katrin Iken

Organization:

University of Alaska Fairbanks

Email Address:

kbiken@alaska.edu

Id:

https://orcid.org/0000-0001-7961-1012

Role:

Co-Principal Investigator

Individual:

Jeremy Kasper

Organization:

University of Alaska Fairbanks

Email Address:

jlkasper@alaska.edu

Id:

https://orcid.org/0000-0003-0975-6114

Role:

Co-Principal Investigator

Individual:

Vanessa Lougheed

Organization:

The University of Texas at El Paso

Email Address:

vlougheed@utep.edu

Id:

https://orcid.org/0000-0002-6091-1151

Role:

Co-Principal Investigator

Individual:

Andrew Mahoney

Organization:

University of Alaska Fairbanks

Email Address:

armahoney@alaska.edu

Id:

https://orcid.org/0000-0002-8699-3175

Role:

Co-Principal Investigator

Individual:

Bailey McMeans

Organization:

University of Toronto Missisauga

Email Address:

bailey.mcmeans@utoronto.ca

Id:

https://orcid.org/0000-0002-9793-6811

Role:

Co-Principal Investigator

Individual:

Michael Rawlins

Organization:

University of Massachusetts Amherst

Email Address:

mrawlins@umass.edu

Id:

https://orcid.org/0000-0002-3323-8256

Role:

Co-Principal Investigator

Individual:

Yvette Spitz

Organization:

Oregon State University

Email Address:

yvette.spitz@oregonstate.edu

Id:

https://orcid.org/0000-0002-6026-4900

Role:

Co-Principal Investigator

Individual:

Craig Tweedie

Organization:

The University of Texas at El Paso

Email Address:

ctweedie@utep.edu

Id:

https://orcid.org/0000-0002-3409-8881

Role:

Co-Principal Investigator

Individual:

Nathan McTigue

Organization:

The University of Texas at Austin

Email Address:

mctigue@utexas.edu

Id:

https://orcid.org/0000-0002-7686-7095

Role:

Project Manager

Individual:

Timothy Whiteaker

Organization:

The University of Texas at Austin

Email Address:

whiteaker@utexas.edu

Id:

https://orcid.org/0000-0002-1940-4158

Role:

Information Manager

Individual:

An T. Nguyen

Organization:

The University of Texas at Austin

Email Address:

enthusiast@utexas.edu

Id:

https://orcid.org/0000-0001-6519-0173

Role:

Information Manager

Abstract:

This project established a new Long Term Ecological Research (LTER) site along the Alaskan Arctic coastline. Research based out of Utqiagvik (formerly Barrow), Deadhorse, and Kaktovik will address how changes in shoreline erosion and freshwater inflows to the coastal ocean over seasonal, annual, and longer timeframes influence near-shore food webs. Research will be conducted in collaboration with local stakeholder groups and the U.S. Fish and Wildlife Service. This research will advance our fundamental understanding of how input of materials from land and oceanographic conditions interact to influence coastal food webs. It will also allow us to track and understand: 1) how natural climate cycles influence coastal ecosystems in the Arctic, and 2) how climate change effects such as permafrost thaw, shifting precipitation regimes, and losses of sea ice alter coastal ecosystems. Near-shore food webs along the Alaskan Arctic coastline support large populations of migratory fish and waterfowl that are essential to the culture of Iñupiat communities of northern Alaska. The research at this LTER site will create a framework for anticipating the impacts of future changes on the coastal ecosystem that are of great concern to these communities. Results from this LTER program will also be of interest to a broader science community that is working to understand potential connections between Arctic change and global carbon cycling. Finally, this LTER project includes a strong commitment to education through graduate and undergraduate student involvement, post-doctoral mentoring, continuation of a very successful Summer Science K-12 Program in Kaktovik, and establishment of a parallel K-12 program in Utqiagvik. In addition, this project will employ native high school seniors or recently graduated students living in Utqiagvik and Kaktovik as field research assistants.

Recent studies suggest that the ecological framework for understanding what controls food web structure needs to be expanded to include temporal forcing. More specifically, there is mounting evidence that differential availability of seasonally-distinct resources is critical for defining trophic linkages and maintaining stability and resilience of food webs. This new LTER program will use lagoons along the Alaskan Beaufort Sea coast as experimental units to test this concept, and broaden it to include temporal variations over longer timeframes. The Beaufort lagoons are ideal for testing this concept because they experience extreme variability in seasonal cycles, which are now subject to rapid directional shifts driven by climate change. Our overarching question is: How do variations in terrestrial inputs, local production, and exchange between lagoon and ocean waters over seasonal, inter-annual, inter-decadal, and longer timeframes interact to control food web structure through effects on carbon and nitrogen cycling, microbial and metazoan community composition, and trophic linkages? Arctic lagoons provide a unique opportunity to study these interactions in the absence of fringing wetlands that often modulate land-ocean interactions in other lagoon systems. In addition, barrier island geomorphology, which exerts a strong control on water exchange between lagoons and the open ocean, is highly dynamic in the Arctic because sea-ice effects on coastal geomorphology are superimposed on the effects of currents, sea level, and waves. Thus, connections between inputs from land and lagoon ecosystems are more direct, and water exchanges between lagoons and the open ocean are more variable than is typical of lower latitude systems. Specific study sites will be located in Elson Lagoon (western Beaufort), Simpson Lagoon and Stefansson Sound (central Beaufort), and Kaktovik and Jago lagoons (eastern Beaufort). The LTER will include seasonal field work during ice covered, ice break-up, and open water periods and also include sensor deployments for continuous measurements of key biogeochemical and hydrographic parameters.

Funding:

BLE LTER is supported by the National Science Foundation under award #1656026 (2017-08-01 to 2022-07-31).

Additional Award Information:

Funder:

National Science Foundation - Office of Polar Programs

Funder ID:

https://dx.doi.org/10.13039/100000001

Number:

1656026

Title:

LTER: Beaufort Sea Lagoons: An Arctic Coastal Ecosystem in Transition

URL:

https://www.nsf.gov/awardsearch/showAward?AWD_ID=1656026

Maintenance

Maintenance:

Description:

Dataset will be updated every year, normally scheduled for the fall and spring following field season.

Frequency:

annually

History:


scope:	Metadata and data
old value:	No previous revision
change date:	2020-05-14
comment:	An Nguyen : First upload.

scope:	Data
old value:	See previous revision 1
change date:	2020-05-27
comment:	An Nguyen : Fix NAs in longitude values

scope:	Metadata and data
old value:	See previous revision 2
change date:	2020-07-27
comment:	An Nguyen : Change concentrations to molar units

scope:	Metadata and data
old value:	See previous revision 3
change date:	2022-07-23
comment:	An Nguyen : Add data from 2021 field campaigns, change dates collected YYYY-MM-DD to date times collected YYYY-MM-DDThh:mm:ss-hh. Noon local time (AKDT in most cases) is used as a placeholder when times were not recorded (e.g. 2021 and prior). Stefansson Sound stations now denoted with a SSL prefix instead of STL as in previous versions.

scope:	Metadata and data
old value:	See previous revision 4
change date:	2022-11-17
comment:	An Nguyen : Fix labeling error

scope:	Metadata and data
old value:	See previous revision 5
change date:	2023-08-21
comment:	Timothy Whiteaker : Add 2022 data

Other Metadata

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'replicationPolicy' in ns 'http://ns.dataone.org/service/types/v1' ('d1v1:replicationPolicy')
        |     |     |  \___attribute 'numberReplicas' = '1'
        |     |     |  \___attribute 'replicationAllowed' = 'true'
        |     |     |___text '\n        '
        |     |     |___element 'preferredMemberNode'
        |     |     |     |___text 'urn:node:ARCTIC'
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

Additional Metadata

additionalMetadata
        |___text '\n    '
        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'abbreviation' = 'nm'
        |     |     |     |  \___attribute 'id' = 'nanometer'
        |     |     |     |  \___attribute 'multiplierToSI' = '0.000000001'
        |     |     |     |  \___attribute 'name' = 'nanometer'
        |     |     |     |  \___attribute 'parentSI' = 'meter'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text '.000000001 meters'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'abbreviation' = 'umol_L'
        |     |     |     |  \___attribute 'id' = 'microMolesPerLiter'
        |     |     |     |  \___attribute 'multiplierToSI' = '0.000001'
        |     |     |     |  \___attribute 'name' = 'microMolesPerLiter'
        |     |     |     |  \___attribute 'unitType' = 'amountOfSubstanceConcentration'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'µM = µmoles per liter of solution'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'dimensionless'
        |     |     |     |  \___attribute 'name' = 'dimensionless'
        |     |     |     |  \___attribute 'unitType' = 'dimensionless'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'a designation asserting the absence of an associated unit'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'abbreviation' = 'degree'
        |     |     |     |  \___attribute 'id' = 'degree'
        |     |     |     |  \___attribute 'multiplierToSI' = '0.0174532924'
        |     |     |     |  \___attribute 'name' = 'degree'
        |     |     |     |  \___attribute 'parentSI' = 'radian'
        |     |     |     |  \___attribute 'unitType' = 'angle'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text '360 degrees comprise a unit circle.'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

Copyright 2024 Environmental Data Initiative. This material is based upon work supported by the National Science Foundation under grants #2223103 and #2223104. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Please contact us with questions, comments, or for technical assistance regarding this web site or the Environmental Data Initiative. Please read our privacy policy to know what information we collect about you and to understand your privacy rights.

EDI is a collaboration between the University of New Mexico and the University of Wisconsin – Madison, Center for Limnology:

Data Package Metadata View Summary

Water column and sediment porewater nutrient concentrations from lagoon, river, and ocean sites along the Alaska Beaufort Sea coast, 2018-ongoing

Data Entities

Data Table

Data Table

Data Table

Data Table

Data Package Usage Rights

External Annotations

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Water Column Water Chemistry

Sediment Porewater Water Chemistry

Data value flag definitions

Sample precision calculation

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Metadata

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Water column and sediment porewater nutrient concentrations from lagoon, river, and ocean sites along the Alaska Beaufort Sea coast, 2018-ongoing

+/- Data Entities

Data Table

Data Table

Data Table

Data Table

+/- Data Package Usage Rights

+/- External Annotations

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Water Column Water Chemistry

Sediment Porewater Water Chemistry

Data value flag definitions

Sample precision calculation

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Metadata

+/- Additional Metadata

Data Entities

Data Package Usage Rights

External Annotations

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Metadata

Additional Metadata