Data Package Metadata View Summary

Filtered chlorophyll a time series for Beaverdam Reservoir, Carvins Cove Reservoir, Claytor Lake, Falling Creek Reservoir, Gatewood Reservoir, Smith Mountain Lake, Spring Hollow Reservoir in southwestern Virginia and Lake Sunapee in Sunapee, New Hampshire, USA during 2014-2021

General Information

Data Package:

Local Identifier:

edi.52.12

Title:

Filtered chlorophyll a time series for Beaverdam Reservoir, Carvins Cove Reservoir, Claytor Lake, Falling Creek Reservoir, Gatewood Reservoir, Smith Mountain Lake, Spring Hollow Reservoir in southwestern Virginia and Lake Sunapee in Sunapee, New Hampshire, USA during 2014-2021

Alternate Identifier:

DOI PLACE HOLDER

Abstract:

Water column chlorophyll a was analyzed from 2014 to 2021 in seven freshwater reservoirs in southwestern Virginia (VA), USA, and one freshwater lake in Sunapee, New Hampshire (NH). These water bodies are: Beaverdam Reservoir (Vinton, VA), Carvins Cove Reservoir (Roanoke, VA), Claytor Lake (Pulaski, VA), Falling Creek Reservoir (Vinton, VA), Gatewood Reservoir (Pulaski, VA), Smith Mountain Lake (Bedford, VA), Spring Hollow Reservoir (Salem, VA), and Lake Sunapee (Sunapee, NH). Beaverdam, Carvins Cove, Falling Creek, and Spring Hollow Reservoirs are owned and operated by the Western Virginia Water Authority as primary or secondary drinking water sources for Roanoke, Virginia; Gatewood Reservoir is a drinking water source for the Town of Pulaski, Virginia; and Smith Mountain Lake is jointly treated by Bedford Regional Water Authority and Western Virginia Water Authority as a drinking water source for Franklin County, Virginia. Claytor Lake is utilized for hydroelectric power generation by Appalachian Power Company. Lake Sunapee is a glacial lake known for its oligotrophic (clear-water) properties. The dataset consists of depth profiles of chlorophyll a samples generally measured at the deepest site of each reservoir adjacent to the dam or deepwater sites in Lake Sunapee. The water column samples were collected approximately fortnightly from March-April, and weekly from May-October at Falling Creek Reservoir and Beaverdam Reservoir, approximately fortnightly from May-August in most years at Carvins Cove Reservoir, approximately fortnightly from May-August in Gatewood and Spring Hollow Reservoirs from 2014-2016, approximately fortnightly from May-August of 2014 in Smith Mountain Lake, sporadically from May-August of 2014 in Claytor Lake, and weekly from June-August of 2021 in Lake Sunapee. Additional chlorophyll a samples were collected at multiple upstream and inflow sites along tributaries to Beaverdam and Falling Creek Reservoirs in summer 2019. The water samples collected were analyzed for both pheophytin and chlorophyll a to quantify and correct for degraded phytoplankton within the sample.

Publication Date:

2022-02-04

For more information:
Visit:	DOI PLACE HOLDER

Time Period

Begin:

2014-04-18

End:

2021-12-06

People and Organizations
Contact:	Carey, Cayelan C. (Virginia Tech) [ email ]
Creator:	Carey, Cayelan C. (Virginia Tech)
Creator:	Wynne, Jacob H. (Virginia Tech)
Creator:	Lofton, Mary E. (Virginia Tech)
Creator:	Hamre, Kathleen D. (Virginia Tech)
Creator:	Das, Arpita R. (Virginia Tech)
Creator:	Bryant, Caroline E. (Virginia Tech)
Creator:	Doubek, Jonathan P. (Virginia Tech)
Creator:	Niederlehner, Barbara R. (Virginia Tech)
Creator:	Breef-Pilz, Adrienne (Virginia Tech)
Creator:	Woelmer, Whitney M. (Virginia Tech)

Data Entities
Data Table Name:	manual_chlorophyll_2014_2021.csv
Description:	Manual chlorophyll a data at multiple sites
Other Name:	flagging_chla_pub.R
Description:	Script used to collate and flag data for publication up to 2020
Other Name:	chla_qaqc_2022.R
Description:	Script used to collate and flag data for publication after 2020

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/52/12/c90ced759d8a7c994e20e7d3227a84da
Name:	manual_chlorophyll_2014_2021.csv
Description:	Manual chlorophyll a data at multiple sites
Number of Records:	992
Number of Columns:	8

Table Structure

Object Name:

manual_chlorophyll_2014_2021.csv

Size:

45866 bytes

Authentication:

7bd213dd43dc4a1e27c0df5a2156e650 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Column Name:

Reservoir

Site

DateTime

Depth_m

Chla_ugL

Pheo_ugL

Flag_Chla

Flag_Pheo

Definition:

"Three-letter code corresponding to sampled reservoir; BVR=Beaverdam Reservoir, CCR= Carvins Cove, CLY = Claytor Lake, Reservoir, FCR=Falling Creek Reservoir, GWR=Gatewood Reservoir, SHR=Spring Hollow Reservoir, SML = Smith Mountain Lake, SNP = Lake Sunapee"

"Sampling site within each reservoir; 50 = Deep hole or site nearest to dam in each reservoir, 45 = Upstream pelagic site nearest to the deep hole in each reservoir, 30 = Upstream pelagic site in transitional zone of the reservoir, 20 = Different upstream pelagic site in transitional zone of the reservoir, 99 = Farthest downstream site on inflow stream to Falling Creek Reservoir; 100 = Inflow stream to Falling Creek Reservoir or Beaverdam Reservoir; 101 = upstream site along inflow to Falling Creek Reservoir; 102 = Furthest upstream site on inflow stream to Falling Creek Reservoir; 200 = Secondary inflow (wetland) stream to Falling Creek Reservoir or right arm inflow to Beaverdam Reservoir); 01 = Outflow site at spillway of Falling Creek Reservoir or Beaverdam Reservoir; For CCR: 01 = Site near floating platform at Carvins Cove Reservoir; 02 = Near shore site at Carvins Cove Reservoir; 03 = Pelagic site upstream of boat launch at Carvins Cove Reservoir; 04 = Site near boat launch at Carvins Cove Reservoir; 05 = Pelagic site downstream of boat launch at Carvins Cove Reservoir; For SNP: 50 = Site of the Lake Sunapee Protective Association water quality buoy; 40 = Deepest site in close proximity to the Lake Sunapee Protective Association water quality buoy"

Date of sampling. All data were collected in the eastern time zone of the U.S.A.

Water depth where the sample was collected

Chlorophyll a concentration

Pheophytin concentration

Data flag for Chlorophyll a

Data flag for pheophytin

Storage Type:

string

float

date

float

string

Measurement Type:

nominal

ratio

dateTime

ratio

nominal

Measurement Values Domain:

Definition

Unit	dimensionless
Type	natural
Min	1
Max	200

Format	YYYY-MM-DD hh:mm:ss
Precision

Unit	meter
Type	real
Min	0.1
Max	34

Unit	microgramsPerLiter
Type	real
Min	0
Max	158

Unit	microgramsPerLiter
Type	real
Min	-67.2
Max	36.6

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	0 = No flag
Source

Code Definition

Code	1
Definition	1 = Sample below detection
Source

Code Definition

Code	2
Definition	2 = Sample not taken
Source

Code Definition

Code	3
Definition	3 = Duplicate check failed
Source

Code Definition

Code	4
Definition	4 = Pigment in extract below detection (<34 ug/L)
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	0 = No flag
Source

Code Definition

Code	1
Definition	1 = Sample below detection
Source

Code Definition

Code	2
Definition	2 = Sample not taken
Source

Code Definition

Code	3
Definition	3 = Duplicate check failed
Source

Code Definition

Code	4
Definition	4 = Pigment in extract below detection (<34 ug/L)
Source

Missing Value Code:

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Code	NA
Expl	value is missing

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

flagging_chla_pub.R

Entity Type:

unknown

Description:

Script used to collate and flag data for publication up to 2020

Physical Structure Description:

Object Name:

flagging_chla_pub.R

Size:

17688 bytes

Authentication:

c2475f2ed5c4ce5090515086bd41205b Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/52/12/05eb0f4f09c7c31bb78e6b5180a80b2f

Non-Categorized Data Resource

Name:

chla_qaqc_2022.R

Entity Type:

unknown

Description:

Script used to collate and flag data for publication after 2020

Physical Structure Description:

Object Name:

chla_qaqc_2022.R

Size:

4267 bytes

Authentication:

4230ce2815c734f2dcb04da8465a1a54 Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/52/12/e67005c4f4e525d0a30af612721e6c40

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data (\"Data User\" herein) is required to cite it appropriately in any publication that results from its use. 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 duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
carey lab controlled vocabulary	Virginia Tech, Stream Team, Carey Lab, Western Virginia Water Authority, Falling Creek Reservoir, filtered chlorophyll, manual chlorophyll, Sunapee
cuahsi controlled vocabulary	Lake, Reservoir
lter controlled vocabulary	chlorophyll, chlorophyll a, plankton, phytoplankton, algae

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:

SAMPLING TIMES; Sampling occurred between the hours of 9:00 and 15:00 EST and are denoted in the DateTime column as 12:00.

SAMPLE COLLECTION AND EQUIPMENT; Unfiltered water samples were collected at the following depths for each reservoir or lake: 0.1, 5, 6, 12, 14, 18, 19, 20, and 21 meters within Carvins Cove Reservoir, which has a maximum depth (Zmax) of 21.3 meters at full pond; 0.1, 5, 6, 7, 30, and 34 meters within Claytor Lake; 0.1, 4, 5, 6, 8, 9, 10, 12, 13, 13.5 and 14 meters within Gatewood Reservoir, which has a Zmax of 14 meters; 0.1, 5, 7, 8, 14, 25, 28 and 31 meters within Spring Hollow Reservoir, which has a Zmax of >60 m; 0.1, 6, 7, 8, 25, 28 and 30 meters within Smith Mountain Lake; 0.1, 1.5, 3, 3.5, 4, 5, 6, 6.5, 6.8, 7, 7.5, 9, and 12 meters within Beaverdam Reservoir, which has a Zmax of 13 meters at full pond; 0.1, 1, 1.6, 2, 2.8, 3.8, 4, 4.1, 4.5, 5, 6, 6.2, 7, and 9 meters within Falling Creek Reservoir, which has a Zmax of 9.3 meters at full pond; and 0.1, 1, and 9 meters within Lake Sunapee, which has a Zmax of 32 meters. A 4-L Van Dorn water sampler was used to collect samples (Wildco, Yulee, Florida, USA) which were stored in opaque 2-L high-density polyethylene bottles. Samples were refrigerated and filtered within 48 hours of collection with GF/C filters and filters were immediately frozen after filtration. Samples were generally analyzed within 4 months of collection date.

CHEMICAL ANALYSES AND EQUIPMENT; Samples were extracted using a 96% ethanol solution at room temperature for 3-24 hours (Wasmund et al. 2006) and then analyzed by spectrophotometric analysis. To quantify the concentration of pheophytin within the sample, the analysis adopts the acidification recommendation of Parker et al. (2016), in which 240 microliters of 0.1 N HCl was added to the sample. The sample was homogenized and left to sit for 90 seconds for samples analyzed through 2018, or 120 seconds for samples analyzed after 2019. Samples were quantified using the monochromatic spectrophotometric method for chlorophyll a after correction for the presence of pheopigments, to provide a metric of "live" phytoplankton at the time of collection (Lorenzen 1967). The pheophytin concentration (a metric of "dead" but still fluorescing phytoplankton) is also reported. In 2014, total chlorophyll a was corrected for pheophytin but values for pheophytin were lost during digitization. Samples were deemed below detection based on the difference between values quantified before and after acidification. Both extraction and analysis were performed in the absence of direct light to prevent the degradation of chlorophyll a. Samples collected were not always analyzed, leading to occasional incomplete water column profiles for certain dates within the dataset.

REFERENCES;

Lorenzen, C.J. 1967. Determinations of chlorophyll and pheo-pigments: spectrophotometric equations. Limnol. Oceanogr. 12:343-346.

Parker, S. P., W. B. Bowden, and M. B. Flinn. 2016. The effect of acid strength and postacidification reaction time on the determination of chlorophyll a in ethanol extracts of aquatic periphyton. Limnology and Oceanography: Methods 14:839-852.

Wasmund, N., I. Topp, and D. Schories. 2006. Optimising the storage and extraction of chlorophyll samples. Oceanologica 48(1):125-144.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@environmentaldatainitiative.org

Web Address:

https://environmentaldatainitiative.org

Id:

https://ror.org/0330j0z60

Creators:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Individual:

Jacob H. Wynne

Organization:

Virginia Tech

Email Address:

jacobwynne@vt.edu

Id:

https://orcid.org/0000-0003-4221-1247

Individual:

Mary E. Lofton

Organization:

Virginia Tech

Email Address:

melofton@vt.edu

Id:

https://orcid.org/0000-0003-3270-1330

Individual:

Kathleen D. Hamre

Organization:

Virginia Tech

Email Address:

kdhamre@vt.edu

Individual:

Arpita R. Das

Organization:

Virginia Tech

Email Address:

arpitadas@vt.edu

Individual:

Caroline E. Bryant

Organization:

Virginia Tech

Email Address:

Carolb00@vt.edu

Individual:

Jonathan P. Doubek

Organization:

Virginia Tech

Email Address:

jdoubek@lssu.edu

Id:

https://orcid.org/0000-0003-2651-4715

Individual:

Barbara R. Niederlehner

Organization:

Virginia Tech

Email Address:

bniederl@vt.edu

Individual:

Adrienne Breef-Pilz

Organization:

Virginia Tech

Email Address:

abreefpilz@vt.edu

Id:

https://orcid.org/0000-0002-6759-0063

Individual:

Whitney M. Woelmer

Organization:

Virginia Tech

Email Address:

wwoelmer@vt.edu

Id:

https://orcid.org/0000-0001-5147-3877

Contacts:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Temporal, Geographic and Taxonomic Coverage

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

Time Period

Begin:

2014-04-18

End:

2021-12-06

Geographic Region:

Description:

"Beaverdam Reservoir is located in Vinton, Virginia, USA"

Bounding Coordinates:

Northern:	37.322865	Southern:	37.311961
Western:	-79.824834	Eastern:	-79.813848

Geographic Region:

Description:

"Carvins Cove Reservoir is located in Roanoke, Virginia, USA"

Bounding Coordinates:

Northern:	37.409127	Southern:	37.365345
Western:	-79.978642	Eastern:	-79.944052

Geographic Region:

Description:

"Claytor Lake is located in Pulaski, Virginia, USA "

Bounding Coordinates:

Northern:	37.086718	Southern:	36.967031
Western:	-80.74543	Eastern:	-80.576912

Geographic Region:

Description:

"Falling Creek Reservoir is located in Vinton, Virginia, USA"

Bounding Coordinates:

Northern:	37.309589	Southern:	37.30266
Western:	-79.839249	Eastern:	-79.836009

Geographic Region:

Description:

"Gatewood Reservoir is located in Pulaski, Virginia, USA"

Bounding Coordinates:

Northern:	37.054358	Southern:	37.03819
Western:	-80.89188	Eastern:	-80.858492

Geographic Region:

Description:

"Smith Mountain Lake is located in Bedford, Franklin and Pittsylvania, Virginia, USA"

Bounding Coordinates:

Northern:	37.158577	Southern:	37.002455
Western:	-79.726699	Eastern:	-79.522078

Geographic Region:

Description:

"Spring Hollow Reservoir is located in Salem, Virginia, USA"

Bounding Coordinates:

Northern:	37.231092	Southern:	37.217594
Western:	-80.179076	Eastern:	-80.170407

Geographic Region:

Description:

"Lake Sunapee is located in Sunapee, New Hampshire, USA"

Bounding Coordinates:

Northern:	43.431481	Southern:	43.321181
Western:	-72.08948	Eastern:	-72.033127

Project

Parent Project Information:

Title:

No project title to report

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

Western Virginia Water Authority

Related Project:

Title:

SCC-IRG Track 2: Resilient Water Systems: Integrating Environmental Sensor Networks and Real-Time Forecasting to Adaptively Manage Drinking Water Quality and Build Social Trust

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

National Science Foundation 1737424

Related Project:

Title:

Collaborative Research: Consequences of changing oxygen availability for carbon cycling in freshwater ecosystems

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

National Science Foundation 1753639

Related Project:

Title:

Collaborative Research: CIBR: Cyberinfrastructure Enabling End-to-End Workflows for Aquatic Ecosystem Forecasting

Personnel:

Individual:

Cayelan C. Carey

Organization:

Virginia Tech

Email Address:

cayelan@vt.edu

Id:

https://orcid.org/0000-0001-8835-4476

Role:

Principal Investigator

Funding:

National Science Foundation 1933016

Related Project:

Title:

Collaborative Research: CIBR: Cyberinfrastructure Enabling End-to-End Workflows for Aquatic Ecosystem Forecasting

Personnel:

Individual:

Renato J. Figueiredo

Organization:

University of Florida

Email Address:

renato@ece.ufl.edu

Id:

https://orcid.org/0000-0001-9841-6060

Role:

Principal Investigator

Funding:

National Science Foundation 1933102

Maintenance

Maintenance:

Description:	ongoing
Frequency:

Additional Info

Additional Information:

Reservoir Sites

Falling Creek Reservoir - Site 50 - Verbal Description: Deep hole nearest to the dam of Falling Creek Reservoir o Latitude: 37.30325 o Longitude: -79.83726

- Site 45 - Verbal Description: Upstream pelagic site nearest to the deep hole of Falling Creek Reservoir o Latitude: 37.30418 o Longitude: -79.83833

- Site 30 - Verbal Description: Upstream pelagic site in transitional zone of Falling Creek Reservoir o Latitude: 37.30534 o Longitude: -79.83825

- Site 20 - Verbal Description: Different upstream pelagic site in transitional zone of Falling Creek Reservoir o Latitude: 37.30769 o Longitude: -79.8371

- Site 99 - Verbal Description: Farthest downstream site on inflow stream to Falling Creek Reservoir. o Latitude: 37.307613 o Longitude: -79.8360878

- Site 100 - Verbal Description: Inflow stream to Falling Creek Reservoir. o Latitude: 37.30858 o Longitude: -79.83494

- Site 101 - Verbal Description: Upstream site along inflow to Falling Creek Reservoir. o Latitude: 37.309653 o Longitude: -79.830467

- Site 102 - Verbal Description: Furthest upstream site on inflow stream to Falling Creek Reservoir. o Latitude: 37.311678 o Longitude: -79.827357

- Site 200 - Verbal Description: Secondary inflow (wetland) stream to Falling Creek Reservoir. o Latitude: 37.30943 o Longitude: -79.8361

- Site 01 - Verbal Description: Outflow site at spillway of Falling Creek Reservoir. o Latitude: 37.30247 o Longitude: -79.83692

Beaverdam Reservoir - Site 50 - Verbal Description: Deep hole nearest to the dam of Beaverdam Reservoir. o Latitude: 37.31288 o Longitude: -79.81593

- Site 45 - Verbal Description: Upstream pelagic site nearest to the deep hole of Beaverdam Reservoir o Latitude: 37.314465 o Longitude: -79.818717

- Site 30 - Verbal Description: Upstream pelagic site in transitional zone of Beaverdam Reservoir. o Latitude: 37.31921 o Longitude: -79.818226

- Site 20 - Verbal Description: Different upstream pelagic site in transitional zone of Beaverdam Reservoir. o Latitude: 37.30769 o Longitude: -79.8371

- Site 100 - Verbal Description: Inflow stream to Beaverdam Reservoir. o Latitude: 37.31957 o Longitude: -79.82437

- Site 200 - Verbal Description: Right arm inflow to Beaverdam Reservoir. o Latitude: 37.322851 o Longitude: -79.81721

- Site 01 - Verbal Description: Outflow pipe in transitional zone of Beaverdam Reservoir. o Latitude: 37.314783 o Longitude: -79.820864

Carvins Cove Reservoir - Site 50 - Verbal Description: Deep hole nearest to the dam of Carvins Cove Reservoir. o Latitude: 37.369712 o Longitude: -79.957976

- Site 1 - Verbal Description: Site near floating platform at Carvins Cove Reservoir. o Latitude: 37.3839 o Longitude: -79.9491

- Site 2 - Verbal Description: Near shore site at Carvins Cove Reservoir. o Latitude: 37.3850 o Longitude: -79.9510

- Site 3 - Verbal Description: Pelagic site upstream of boat launch at Carvins Cove Reservoir. o Latitude: 37.3922 o Longitude: -79.9488

- Site 4 - Verbal Description: Site near boat launch at Carvins Cove Reservoir. o Latitude: 37.3845 o Longitude: -79.9471

- Site 5 - Verbal Description: Pelagic site downstream of boat launch at Carvins Cove Reservoir. o Latitude: 37.3788 o Longitude: -79.9529

Lake Sunapee - Site 50 - Verbal Description: Site of the Lake Sunapee Protective Association water quality buoy. o Latitude: 43.391308 o Longitude: -72.058973

- Site 40 - Verbal Description: Deepest site in close proximity to the Lake Sunapee Protective Association water quality buoy o Latitude: 43.382772 o Longitude: -72.064545

CCC developed and led the reservoir monitoring program 2013-present, and oversaw the collection and analysis of this dataset throughout this time. JHW is the point person for chlorophyll-a data collation and laboratory analysis, QAQC and publishing from 2019 - 2021. ABP led field collection in 2020 and 2021. WMW helped coordinate and supervise chlorophyll-a analysis and processing from 2019-2021. AD and CEB led field prep and post-processing in 2021. MEL was the point person for chl data collection, analysis, and QAQC from 2016–2018. KDH was the point person for chl data collection, analysis, QAQC and publishing from 2014-2015, and JPD was the point person for data collection, analysis, QAQC and publishing for 2013-2014. BRN developed analysis methods, led chemical analyses during COVID 19 (2020-2021), and trained all co-authors on analytical chemistry instruments, analyses, and QAQC best practices.

From 2014 to 2021, multiple whole-ecosystem manipulations were conducted at Falling Creek Reservoir. These manipulations include intermittent operation of hypolimnetic oxygenation and pulsed epilimnetic mixing engineering systems. For a detailed description of the hypolimnetic oxygenation engineered system, see Gerling et al. (2014) and for a detailed description of the epilimnetic mixing engineered system, see Chen et al. (2017). These systems were operated over time from 2014-2018 following Table 1 in Gerling et al. (2016), Table 1 in Munger et al. (2016), and Table 2 in McClure et al. (2018). 2019: 3 June-17 June; 8 July-19 July; 5 August-19 August; 2 September-1 December; 2020: 29 June-11 September; 25 September-2 December; 2021: 11 June-26 June; 26 July-14 September(different controller for oxygen-not sure how well it worked); 14 September-6 December(regular oxygen controller)

Chen, S., C. Lei, C.C. Carey, P.A. Gantzer, and J.C. Little. 2017. Predicting hypolimnetic oxygenation and epilimnetic mixing in a shallow eutrophic reservoir using a coupled three-dimensional hydrodynamic model. Water Resources Research. 53: 470-484. DOI: 10.1002/2016WR019279

Gerling, A.B., Browne, R.G., Gantzer, P.A., Mobley, M.H., Little, J.C., and C.C. Carey. 2014. First report of the successful operation of a side stream supersaturation hypolimnetic oxygenation system in a eutrophic, shallow reservoir. Water Research. 67: 129-143. doi: 10.1016/j.watres.2014.09.002

Gerling, A.B., Z.W. Munger, J.P. Doubek, K.D. Hamre, P.A. Gantzer, J.C. Little, and C.C. Carey. 2016. Whole-catchment manipulations of internal and external loading reveal the sensitivity of a century-old reservoir to hypoxia. Ecosystems. 19:555-571. DOI: 10.1007/s10021-015-9951-0

McClure, R.P., K.D. Hamre, B.R. Niederlehner, Z.W. Munger, S. Chen, M.E. Lofton, M.E. Schreiber, and C.C. Carey. 2018 Metalimnetic oxygen minima alter the vertical profiles of carbon dioxide and methane in a managed freshwater reservoir. Science of the Total Environment 636: 610-620. DOI: 10.1016/j.scitotenv.2018.04.255

Munger, Z.W., C.C. Carey, A.B. Gerling, K.D. Hamre, J.P. Doubek, S.D. Klepatzki, R.P. McClure, and M.E. Schreiber. 2016. Effectiveness of hypolimnetic oxygenation for preventing accumulation of Fe and Mn in a drinking water reservoir. Water Research. 106: 1-14. DOI: 10.1016/j.watres.2016.09.038.

Lofton, M.E., McClure, R.P., Chen, S., Little, J.C., and C.C. Carey. 2019. Whole-ecosystem experiments reveal varying responses of phytoplankton functional groups to epilimnetic mixing in a eutrophic reservoir. Water. 11, 222; DOI:10.3390/w11020222.

Other Metadata

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Data Package Metadata View Summary

Filtered chlorophyll a time series for Beaverdam Reservoir, Carvins Cove Reservoir, Claytor Lake, Falling Creek Reservoir, Gatewood Reservoir, Smith Mountain Lake, Spring Hollow Reservoir in southwestern Virginia and Lake Sunapee in Sunapee, New Hampshire, USA during 2014-2021

Data Entities

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

Data Package Usage Rights

Keywords

Methods and Protocols

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

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Parent Project Information:

Maintenance

Additional Info

Recently Added

Recently Updated

Data Package Metadata View Summary

Filtered chlorophyll a time series for Beaverdam Reservoir, Carvins Cove Reservoir, Claytor Lake, Falling Creek Reservoir, Gatewood Reservoir, Smith Mountain Lake, Spring Hollow Reservoir in southwestern Virginia and Lake Sunapee in Sunapee, New Hampshire, USA during 2014-2021

+/- Data Entities

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

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

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

+/- Additional Info

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance

Additional Info