Data Package Metadata   View Summary

High frequency limnological sensor data from three lakes in the Pocono Mountains region, Pennsylvania USA, 2016-2023

General Information
Data Package:
Local Identifier:edi.1632.3
Title:High frequency limnological sensor data from three lakes in the Pocono Mountains region, Pennsylvania USA, 2016-2023
Alternate Identifier:DOI PLACE HOLDER
Abstract:

This dataset publication provides access to seven years of high-frequency sensor data from three lakes: Giles, Lacawac, and Waynewood. These lakes are located in the Pocono Mountains region of Pennsylvania, USA and have been the site of long-term monitoring and research. Lake Giles is a relatively clear-water low dissolved organic matter oligotrophic lake in a largely protected watershed. Lake Lacawac has higher dissolved organic matter concentrations and is considered a dystrophic brown-water system; it is also in a highly-protected watershed. Lake Waynewood is a relatively productive eutrophic lake with a larger watershed that is mixed agricultural, forested, and residential use. High-frequency sensors were deployed on sensor lines at the deepest point in each lake. Measurements included temperature and dissolved oxygen through the water column, fluorescent dissolved organic matter at the surface and bottom, and chlorophyll fluorescence at the surface of each lake. These data are collected at a frequency of 10 to 30 minutes and are available in the data packages GilesHighFrequencyData.csv, LacawacHighFrequencyData.csv, and WaynewoodHighFrequencyData.csv. Data from weather stations located adjacent to each lake can be found in the data package PoconosWeatherStationData.csv. Additional long-term limnological data (four decades) for Lakes Giles, Lacawac, and Waynewood are available in the data package edi.186.8.

Publication Date:2024-05-16
For more information:
Visit: DOI PLACE HOLDER

Time Period
Begin:
2016-10-16
End:
2023-10-16

People and Organizations
Contact:Rose, Kevin C (Rensselaer Polytechnic Institute, Lead Principal Investigator) [  email ]
Creator:Rose, Kevin C (Rensselaer Polytechnic Institute, Principal Investigator)
Creator:Robinson, Jenna (Rensselaer Polytechnic Institute, PhD Candidate)

Data Entities
Data Table Name:
GilesHighFrequencyData
Description:
High-frequency data from sensors in Lake Giles in the Pocono Mountains, PA, USA.
Data Table Name:
LacawacHighFrequencyData
Description:
High-frequency data from sensors in Lake Lacawac in the Pocono Mountains, PA, USA.
Data Table Name:
WaynewoodHighFrequencyData
Description:
High-frequency data from sensors in Lake Waynewood in the Pocono Mountains, PA, USA.
Data Table Name:
PoconoLakesWeatherStationData
Description:
Data from weather stations located adjacent to Lakes Giles, Lacawac, and Waynewood.
Detailed Metadata

Data Entities


Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/1632/3/c653b8de40dc20d3e894736a54144c87
Name:GilesHighFrequencyData
Description:High-frequency data from sensors in Lake Giles in the Pocono Mountains, PA, USA.
Number of Records:10510565
Number of Columns:14

Table Structure
Object Name:GilesHighFrequencyData.csv
Size:1442460330 byte
Authentication:dd2ec2dbe89659ea48276ebc62b7d6ad Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 FileNameSensorTypeSerialNumberDateTimeDepth_mVariableTypeSensorValueBattery_voltQGainaccelerationX_gaccelerationY_gaccelerationZ_g
Column Name:FileName  
SensorType  
SerialNumber  
Lake  
DateTime  
Depth_m  
VariableType  
SensorValue  
Battery_volt  
Q  
Gain  
accelerationX_g  
accelerationY_g  
accelerationZ_g  
Definition:Contains the name of the original source file of the dataContains the type of sensor that recorded the dataSensor serial numbersThe lake the data was collected inDate and Time in UTCDepth from the surface of the lakeThe variable measuredThe value recorded by the sensor. Units included in Variable Type.Battery voltage at the time of measurementMeasurement of qualityMeasurement of the power of the signal1 of 3 axes of acceleration1 of 3 axes of acceleration1 of 3 axes of acceleration
Storage Type:string  
string  
float  
string  
dateTime  
float  
string  
float  
float  
float  
string  
float  
float  
float  
Measurement Type:nominalnominalrationominaldateTimerationominalratioratiorationominalratioratioratio
Measurement Values Domain:
Definitiontext
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codecyclops7
DefinitionPME Cyclops-7 logger
Source
Code Definition
CodeHOBO Temp
DefinitionHOBO Water Temperature Pro v2 Data Logger (U22-001)
Source
Code Definition
CodeLevel Logger
DefinitionSolinst Level Logger Model 3001
Source
Code Definition
CodeminiDOT
DefinitionPME miniDOT Logger
Source
Code Definition
CodeodysseyPAR
DefinitionOdyssey Photosynthetically Active Radiation Logger
Source
Code Definition
CodeminiPAR
DefinitionPME miniPAR (Photosynthetically Active Radiation) Logger
Source
UnitNA
Typeinteger
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeGiles
DefinitionLake Giles
Source
FormatYYYY-MM-DD hh:mm:ss
Precision
Unitmeter
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeCDOM
DefinitionChromophoric Dissolved Organic Matter fluorescence in RFU
Source
Code Definition
CodeChlorophyll
DefinitionChrlorophyll-a fluorescence in RFU
Source
Code Definition
CodeDO_mgL
DefinitionDissolved Oxygen in milligrams per Liter
Source
Code Definition
CodeTemp_degC
DefinitionTemperature in degrees Celcius
Source
Code Definition
CodeWater_level_m
DefinitionWater level in meters
Source
Code Definition
CodeIntegrating_Light_no_cal
DefinitionIntegrating light units from an Odyssey Logger that has not been calibrated
Source
Code Definition
CodePAR_µEinsteins.m2.s
DefinitionPhotosynthetically Active Radiation in micro Einsteins per meter squared per second
Source
Code Definition
CodePAR_umol.s.m2
DefinitionPhotosynthetically Active Radiation in micro moles per meter squared per second
Source
UnitVariable
Typereal
Unitvolt
Typereal
UnitNA
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code10
DefinitionGain of 10
Source
Code Definition
Code100
DefinitionGain of 100
Source
UnitG-force
Typereal
UnitG-force
Typereal
UnitG-force
Typereal
Missing Value Code:                
CodeNA
ExplNo data on this variable from this sensor
CodeNA
ExplNo data on this variable from this sensor
CodeNA
ExplNot measured with this sensor
CodeNA
ExplNot recorded by this sensor
CodeNA
ExplNot recorded by this sensor
CodeNA
ExplNot recorded by this sensor
Accuracy Report:                            
Accuracy Assessment:                            
Coverage:                            
Methods:                            

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/1632/3/3200d451481fe0f3865704ab70bd7b93
Name:LacawacHighFrequencyData
Description:High-frequency data from sensors in Lake Lacawac in the Pocono Mountains, PA, USA.
Number of Records:5482913
Number of Columns:14

Table Structure
Object Name:LacawacHighFrequencyData.csv
Size:760775950 byte
Authentication:49c053ce479f9c603b80c31bcddabaa1 Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 FileNameSensorTypeSerialNumberDateTimeDepth_mVariableTypeSensorValueBattery_voltQGainaccelerationX_gaccelerationY_gaccelerationZ_g
Column Name:FileName  
SensorType  
SerialNumber  
Lake  
DateTime  
Depth_m  
VariableType  
SensorValue  
Battery_volt  
Q  
Gain  
accelerationX_g  
accelerationY_g  
accelerationZ_g  
Definition:Contains the name of the original source file of the dataContains the type of sensor that recorded the dataSensor serial numbersThe lake the data was collected inDate and Time in UTCDepth from the surface of the lakeThe variable measuredThe value recorded by the sensor. Units included in Variable Type.Battery voltage at the time of measurementMeasurement of qualityMeasurement of the power of the signal1 of 3 axes of acceleration1 of 3 axes of acceleration1 of 3 axes of acceleration
Storage Type:string  
string  
float  
string  
dateTime  
float  
string  
float  
float  
float  
string  
float  
float  
float  
Measurement Type:nominalnominalrationominaldateTimerationominalratioratiorationominalratioratioratio
Measurement Values Domain:
Definitiontext
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codecyclops7
DefinitionPME Cyclops-7 logger
Source
Code Definition
CodeHOBO Temp
DefinitionHOBO Water Temperature Pro v2 Data Logger (U22-001)
Source
Code Definition
CodeLevel Logger
DefinitionSolinst Level Logger Model 3001
Source
Code Definition
CodeminiDOT
DefinitionPME miniDOT Logger
Source
Code Definition
CodeodysseyPAR
DefinitionOdyssey Photosynthetically Active Radiation Logger
Source
Code Definition
CodeminiPAR
DefinitionPME miniPAR (Photosynthetically Active Radiation)
Source
UnitNA
Typeinteger
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeLacawac
DefinitionLake Lacawac
Source
FormatYYYY-MM-DD hh:mm:ss
Precision
Unitmeter
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeCDOM
DefinitionChromophoric Dissolved Organic Matter fluorescence in RFU
Source
Code Definition
CodeChlorophyll
DefinitionChrlorophyll-a fluorescence in RFU
Source
Code Definition
CodeDO_mgL
DefinitionDissolved Oxygen in milligrams per Liter
Source
Code Definition
CodeTemp_degC
DefinitionTemperature in degrees Celcius
Source
Code Definition
CodeWater_level_m
DefinitionWater level in meters
Source
Code Definition
CodeIntegrating_Light_no_cal
DefinitionIntegrating light units from an Odyssey Logger that has not been calibrated
Source
Code Definition
CodePAR_µEinsteins.m2.s
DefinitionPhotosynthetically Active Radiation in micro Einsteins per meter squared per second
Source
Code Definition
CodePAR_umol.s.m2
DefinitionPhotosynthetically Active Radiation in micro moles per meter squared per second
Source
UnitVariable
Typereal
Unitvolt
Typereal
UnitNA
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code10
DefinitionGain of 10
Source
Code Definition
Code100
DefinitionGain of 100
Source
Code Definition
Code1
DefinitionGain of 1
Source
UnitG-force
Typereal
UnitG-force
Typereal
UnitG-force
Typereal
Missing Value Code:                
CodeNA
ExplNo data on this variable from this sensor
CodeNA
ExplNo data on this variable from this sensor
CodeNA
ExplNo data on this variable from this sensor
CodeNA
ExplNot recorded by this sensor
CodeNA
ExplNot recorded by this sensor
CodeNA
ExplNot recorded by this sensor
Accuracy Report:                            
Accuracy Assessment:                            
Coverage:                            
Methods:                            

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/1632/3/4f24b01a526aa248a1ce9858b18736c7
Name:WaynewoodHighFrequencyData
Description:High-frequency data from sensors in Lake Waynewood in the Pocono Mountains, PA, USA.
Number of Records:4590226
Number of Columns:14

Table Structure
Object Name:WaynewoodHighFrequencyData.csv
Size:652019599 byte
Authentication:d743109ffbba9f3a3f5af0c7da4f6a2c Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 FileNameSensorTypeSerialNumberDateTimeDepth_mVariableTypeSensorValueBattery_voltQGainaccelerationX_gaccelerationY_gaccelerationZ_g
Column Name:FileName  
SensorType  
SerialNumber  
Lake  
DateTime  
Depth_m  
VariableType  
SensorValue  
Battery_volt  
Q  
Gain  
accelerationX_g  
accelerationY_g  
accelerationZ_g  
Definition:Contains the name of the original source file of the dataContains the type of sensor that recorded the dataSensor serial numbersThe lake the data was collected inDate and Time in UTCDepth from the surface of the lakeThe variable measuredThe value recorded by the sensor. Units included in Variable Type.Battery voltage at the time of measurementMeasurement of qualityMeasurement of the power of the signal1 of 3 axes of acceleration1 of 3 axes of acceleration1 of 3 axes of acceleration
Storage Type:string  
string  
float  
string  
dateTime  
float  
string  
float  
float  
float  
string  
float  
float  
float  
Measurement Type:nominalnominalrationominaldateTimerationominalratioratiorationominalratioratioratio
Measurement Values Domain:
Definitiontext
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codecyclops7
DefinitionPME Cyclops-7 logger
Source
Code Definition
CodeHOBO Temp
DefinitionHOBO Water Temperature Pro v2 Data Logger (U22-001)
Source
Code Definition
CodeLevel Logger
DefinitionSolinst Level Logger Model 3001
Source
Code Definition
CodeminiDOT
DefinitionPME miniDOT Logger
Source
Code Definition
CodeodysseyPAR
DefinitionOdyssey Photosynthetically Active Radiation Logger
Source
UnitNA
Typeinteger
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeWaynewood
DefinitionLake Waynewood
Source
FormatYYYY-MM-DD hh:mm:ss
Precision
Unitmeter
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeCDOM
DefinitionChromophoric Dissolved Organic Matter fluorescence in RFU
Source
Code Definition
CodeChlorophyll
DefinitionChrlorophyll-a fluorescence in RFU
Source
Code Definition
CodeDO_mgL
DefinitionDissolved Oxygen in milligrams per Liter
Source
Code Definition
CodeTemp_degC
DefinitionTemperature in degrees Celcius
Source
Code Definition
CodeWater_level_m
DefinitionWater level in meters
Source
Code Definition
CodeIntegrating_Light_no_cal
DefinitionIntegrating light units from an Odyssey Logger that has not been calibrated
Source
Code Definition
CodePAR_µEinsteins.m2.s
DefinitionPhotosynthetically Active Radiation in micro Einsteins per meter squared per second
Source
UnitVariable
Typereal
Unitvolt
Typereal
UnitNA
Typereal
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Code10
DefinitionGain of 10
Source
Code Definition
Code100
DefinitionGain of 100
Source
UnitG-force
Typereal
UnitG-force
Typereal
UnitG-force
Typereal
Missing Value Code:                
CodeNA
ExplNo data on this variable from this sensor
CodeNA
ExplNo data on this variable from this sensor
CodeNA
ExplNot measured with this sensor
CodeNA
ExplNot recorded by this sensor
CodeNA
ExplNot recorded by this sensor
CodeNA
ExplNot recorded by this sensor
Accuracy Report:                            
Accuracy Assessment:                            
Coverage:                            
Methods:                            

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/edi/1632/3/d63f078796998cf1bac9b7d6688b5035
Name:PoconoLakesWeatherStationData
Description:Data from weather stations located adjacent to Lakes Giles, Lacawac, and Waynewood.
Number of Records:261172
Number of Columns:11

Table Structure
Object Name:PoconosWeatherStationData.csv
Size:24444289 byte
Authentication:5c7db0190368a1143bb028dcd170d3de Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 LakeDateTimeRain_cmPAR_umol_m2_sTemp_CRH_percPressure_HgWindSpeed_mphGustSpeed_mphWindDirection_degDewPt_C
Column Name:Lake  
DateTime  
Rain_cm  
PAR_umol_m2_s  
Temp_C  
RH_perc  
Pressure_Hg  
WindSpeed_mph  
GustSpeed_mph  
WindDirection_deg  
DewPt_C  
Definition:The Lake the weather station is located adjacent to.Date and time of data collection.Amount of rain collected within the prior 15 minutes.Photosynthetically Active RadiationTemperature in degrees CelsiusPercent relative humidity.Barometric pressure in Inches of MercuryWind Speed in miles per hourMaximum wind gust speed in prior 15 minutesDirection of wind in degreesDew Point in degrees Celsius
Storage Type:string  
dateTime  
float  
float  
float  
float  
float  
float  
float  
float  
float  
Measurement Type:nominaldateTimeratioratioratioratioratioratioratioratioratio
Measurement Values Domain:
Allowed Values and Definitions
Enumerated Domain 
Code Definition
CodeGiles
DefinitionWeather Station located adjacent to Lake Giles.
Source
Code Definition
CodeLacawac
DefinitionWeather Station located adjacent to Lake Lacawac.
Source
Code Definition
CodeWaynewood
DefinitionWeather Station located adjacent to Lake Waynewood.
Source
FormatYYYY-MM-DD hh:mm:ss
Precision
Unitcentimeter
Typereal
UnitmicromolePerMeterSquaredPerSecond
Typereal
Unitcelsius
Typereal
Unitpercent
Typereal
Unitin Hg
Typereal
UnitmilePerHour
Typereal
UnitmilePerHour
Typereal
Unitdegree
Typereal
Unitcelsius
Typereal
Missing Value Code:    
CodeNA
ExplMissing data
CodeNA
ExplMissing data
CodeNA
ExplMissing data
CodeNA
ExplMissing data
 
CodeNA
ExplMissing data
CodeNA
ExplMissing data
CodeNA
ExplMissing data
CodeNA
ExplMissing data
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 is considered professional etiquette to provide attribution of the original work if this data package is shared in whole or by individual components. A generic citation is provided for this data package on the website https://portal.edirepository.org (herein "website") in the summary metadata page. Communication (and collaboration) with the creators of this data package is recommended to prevent duplicate research or publication. This data package (and 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 website shall not be liable for any damages resulting from misinterpretation or misuse of the data package or its components. Periodic updates of this data package may be available from the website. Thank you.

Keywords

By Thesaurus:
(No thesaurus)Lake Giles, Lake Lacawac, Lake Waynewood, Pennsylvania, Pike County, Pocono Mountains, Wayne County, Seasonality, fDOM, LTREB
LTER Controlled Vocabularybiogeochemical processes, aquatic ecosystems, ecosystem ecology, lakes, water quality, winter, water column, dataloggers, depth, water level, temperature, dissolved oxygen, fluorescence, irradiance, chlorophyll a, precipitation

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:

High-frequency weather and limnological data from Lakes Giles, Lacawac, and Waynewood, Pennsylvania USA, from 2016 – 2023.

Each of the three lakes contain a sensor line located in the deepest part of the lake (Giles = 24 m, Lacawac = 13 m, and Waynewood = 11 m). The sensor lines are anchored to the bottom of the lake and extend up to ~0.5 m from the surface (sub-surface float). This configuration design enabled year-round deployment, including under ice cover. The sensor lines were equipped with sensors that measure temperature (every meter through the water column), dissolved oxygen (every two meters), chlorophyll fluorescence (1 m from the surface), fluorescent dissolved organic matter (~1 m from the surface and 1 m off the bottom), photosynthetically active radiation (PAR; ~0.5 and ~1.5 m from the surface, removed 2023), and water level (~5 m from the surface). Adjacent to each lake was a weather station (starting in 2021). Sampling frequency varied from 10 to 30-minute intervals and most years include a full-year time span, including under ice.

All data in the high frequency lake-data packages have been quality checked to remove measurements that fall outside of 2.96 standard deviations from the daily mean, any obviously errant readings, and artifacts of sensor line maintenance. Because of this, as well as sensor errors and failure, not all data is available at every point each year. Data were quality checked by J. Robinson (robinj8@rpi.edu).

Data in the weather station package have not undergone any quality control and should be inspected prior to usage. Any missing data is a result of sensor errors or failure.

Instrument(s):HOBO Water Temperature Pro v2 Data Logger U22-001 PME miniDOT Logger PME Cyclops-7 Logger (Chlorophyll and CDOM/FDOM) Solinst Level Logger Model 3001 PME miniPAR Logger Odyssey PAR Logger

People and Organizations

Publishers:
Organization:Environmental Data Initiative
Email Address:
info@edirepository.org
Web Address:
https://edirepository.org
Id:https://ror.org/0330j0z60
Creators:
Individual: Kevin C Rose
Organization:Rensselaer Polytechnic Institute
Position:Principal Investigator
Email Address:
rosek4@rpi.edu
Id:https://orcid.org/0000-0002-1292-9381
Individual: Jenna Robinson
Organization:Rensselaer Polytechnic Institute
Position:PhD Candidate
Email Address:
robinj8@rpi.edu
Id:https://orcid.org/0000-0003-0415-8385
Contacts:
Individual: Kevin C Rose
Organization:Rensselaer Polytechnic Institute
Position:Lead Principal Investigator
Email Address:
rosek4@rpi.edu
Id:https://orcid.org/0000-0002-1292-9381

Temporal, Geographic and Taxonomic Coverage

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

Time Period
Begin:
2016-10-16
End:
2023-10-16
Geographic Region:
Description:• N: 41.376157, S: 41.376157, E: -75.092916, W: -75.092916 • N: 41.381964, S: 41.381964, E: -75.292494, W: -75.292494 • N: 41.394801, S: 41.394801, E: -75.36251, W: -75.36251
Bounding Coordinates:
Northern:  41.394801Southern:  41.376157
Western:  -75.36251Eastern:  -75.092916

Project

Parent Project Information:

Title:Collaborative LTREB Proposal: Will increases in dissolved organic matter accelerate a shift in trophic status through anoxia-driven positive feedbacks in an oligotrophic lake?
Personnel:
Individual: Kevin C Rose
Organization:Rensselaer Polytechnic Institute
Address:
NY
Email Address:
rosek4@rpi.edu
Web Address:
https://orcid.org/0000-0002-1292-9381
Id:https://orcid.org/0000-0002-1292-9381
Role:Principal Investigator
Abstract:

Lakes provide many services to society, such as clean drinking water and productive fisheries. Many lakes, however, are now experiencing increased input of carbon and nutrients, warming temperatures, and declining ice cover, which may reduce water quality or cause blooms of potentially harmful algae. Specifically, many lakes across the United States are experiencing increased browning due to high loading of organic matter leached from land plants. Browning reduces water clarity and interferes with drinking water management practices. In addition, it can cause other changes that may lead to rapid long-term declines in water quality. This research will test the hypothesis that browning may reduce oxygen concentrations in lakes. Low oxygen can cause nutrient release from lake sediments that may increase algae blooms, leading to lake eutrophication. Understanding the effects of browning will increase knowledge of lake ecosystems, and improve forecasts of how lakes will change as their surrounding environments change. This research will also train graduate and undergraduate students, and will lead to better public understanding of threats to lake water quality.

Ecological tipping points are of vital interest as anthropogenic activities rapidly transform natural ecosystems. Changes in dissolved organic matter (DOM) represent one important potential driver of tipping points in aquatic ecosystems. This project will investigate whether increases in terrestrial DOM loading can push clear-water oligotrophic lakes beyond a critical tipping point by stimulating hypolimnetic anoxia and sediment DOM and phosphorus release, which may initiate a positive feedback loop of decreasing water clarity, stronger thermal stratification, and enhanced hypolimnetic anoxia. This feedback loop accelerates ecological change and ultimately may shift lake trophic status toward greener, mesotrophic to eutrophic as well as browner, dystrophic conditions. This project will extend a long-term data set of water quality variables sampled since the late 1980s in two lakes in or near the Lacawac Sanctuary and Biological Field Station, located in northeastern Pennsylvania. Complementing these long-term observations, experiments and modeling will be carried out to understand feedbacks associated with browning and enhancing understanding of broader patterns of change in inland water bodies. The project will support a regional lake monitoring network in Pennsylvania and closely interface with GLEON, the Global Lake Ecological Observatory Network.

Additional Award Information:
Funder:DBI Div Of Biological Infrastructure NSF
Number:DEB-1754265
Title:National Science Foundation DEB-1754265
URL:https://www.nsf.gov/awardsearch/showAward?AWD_ID=1754265&HistoricalAwards=false
Related Project:
Title:Collaborative LTREB Proposal: Will increases in dissolved organic matter accelerate a shift in trophic status through anoxia-driven positive feedbacks in an oligotrophic lake
Personnel:
Individual: Craig E Williamson
Organization:Miami University
Address:
OH
Email Address:
willia85@miamioh.edu
Id:https://orcid.org/0000-0001-7350-1912
Role:Principal Investigator
Abstract:

Lakes provide many services to society, such as clean drinking water and productive fisheries. Many lakes, however, are now experiencing increased input of carbon and nutrients, warming temperatures, and declining ice cover, which may reduce water quality or cause blooms of potentially harmful algae. Specifically, many lakes across the United States are experiencing increased browning due to high loading of organic matter leached from land plants. Browning reduces water clarity and interferes with drinking water management practices. In addition, it can cause other changes that may lead to rapid long-term declines in water quality. This research will test the hypothesis that browning may reduce oxygen concentrations in lakes. Low oxygen can cause nutrient release from lake sediments that may increase algae blooms, leading to lake eutrophication. Understanding the effects of browning will increase knowledge of lake ecosystems, and improve forecasts of how lakes will change as their surrounding environments change. This research will also train graduate and undergraduate students, and will lead to better public understanding of threats to lake water quality.

Ecological tipping points are of vital interest as anthropogenic activities rapidly transform natural ecosystems. Changes in dissolved organic matter (DOM) represent one important potential driver of tipping points in aquatic ecosystems. This project will investigate whether increases in terrestrial DOM loading can push clear-water oligotrophic lakes beyond a critical tipping point by stimulating hypolimnetic anoxia and sediment DOM and phosphorus release, which may initiate a positive feedback loop of decreasing water clarity, stronger thermal stratification, and enhanced hypolimnetic anoxia. This feedback loop accelerates ecological change and ultimately may shift lake trophic status toward greener, mesotrophic to eutrophic as well as browner, dystrophic conditions. This project will extend a long-term data set of water quality variables sampled since the late 1980s in two lakes in or near the Lacawac Sanctuary and Biological Field Station, located in northeastern Pennsylvania. Complementing these long-term observations, experiments and modeling will be carried out to understand feedbacks associated with browning and enhancing understanding of broader patterns of change in inland water bodies. The project will support a regional lake monitoring network in Pennsylvania and closely interface with GLEON, the Global Lake Ecological Observatory Network.

Additional Award Information:
Funder:DBI Div Of Biological Infrastructure NSF
Number:DEB-1754276
Title:National Science Foundation DEB-1754276
URL:https://www.nsf.gov/awardsearch/showAward?AWD_ID=1754276&HistoricalAwards=false
Related Project:
Title:Collaborative LTREB Proposal: Will increases in dissolved organic matter accelerate a shift in trophic status through anoxia-driven positive feedbacks in an oligotrophic lake
Personnel:
Individual: Cathy Collins
Organization:Bard College
Address:
NY
Email Address:
ccollins@bard.edu
Role:Principal Investigator
Individual: Robyn Smyth
Organization:Bard College
Address:
NY
Email Address:
rsmyth@bard.edu
Role:Former Principal Investigator
Abstract:

Lakes provide many services to society, such as clean drinking water and productive fisheries. Many lakes, however, are now experiencing increased input of carbon and nutrients, warming temperatures, and declining ice cover, which may reduce water quality or cause blooms of potentially harmful algae. Specifically, many lakes across the United States are experiencing increased browning due to high loading of organic matter leached from land plants. Browning reduces water clarity and interferes with drinking water management practices. In addition, it can cause other changes that may lead to rapid long-term declines in water quality. This research will test the hypothesis that browning may reduce oxygen concentrations in lakes. Low oxygen can cause nutrient release from lake sediments that may increase algae blooms, leading to lake eutrophication. Understanding the effects of browning will increase knowledge of lake ecosystems, and improve forecasts of how lakes will change as their surrounding environments change. This research will also train graduate and undergraduate students, and will lead to better public understanding of threats to lake water quality.

Ecological tipping points are of vital interest as anthropogenic activities rapidly transform natural ecosystems. Changes in dissolved organic matter (DOM) represent one important potential driver of tipping points in aquatic ecosystems. This project will investigate whether increases in terrestrial DOM loading can push clear-water oligotrophic lakes beyond a critical tipping point by stimulating hypolimnetic anoxia and sediment DOM and phosphorus release, which may initiate a positive feedback loop of decreasing water clarity, stronger thermal stratification, and enhanced hypolimnetic anoxia. This feedback loop accelerates ecological change and ultimately may shift lake trophic status toward greener, mesotrophic to eutrophic as well as browner, dystrophic conditions. This project will extend a long-term data set of water quality variables sampled since the late 1980s in two lakes in or near the Lacawac Sanctuary and Biological Field Station, located in northeastern Pennsylvania. Complementing these long-term observations, experiments and modeling will be carried out to understand feedbacks associated with browning and enhancing understanding of broader patterns of change in inland water bodies. The project will support a regional lake monitoring network in Pennsylvania and closely interface with GLEON, the Global Lake Ecological Observatory Network.

Additional Award Information:
Funder:DBI Div Of Biological Infrastructure NSF
Number:DEB-1754271
Title:National Science Foundation DEB-1754271
URL:https://www.nsf.gov/awardsearch/showAward?AWD_ID=1754271&HistoricalAwards=false

Maintenance

Maintenance:
Description:

Data are updated annually in June of each year.

Frequency:annually
Other Metadata

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