Subtidal temperature values from RAPDGALPGS project in the Eastern Tropical Pacific, Galapagos Islands, Ecuador in 2015 and 2016 (RAPDGALPGS project)

Website: https://www.bco-dmo.org/dataset/628180
Data Type: Other Field Results
Version:
Version Date: 2017-02-10

Project
» RAPID: Understanding Thresholds and regime shifts in marine ecosystems: effects of the 2014-2015 El Nino in the Galapagos rocky subtidal (RAPDGALPGS)
ContributorsAffiliationRole
Witman, Jon D.Brown UniversityPrincipal Investigator, Contact
Smith, FranzBrown UniversityContact
Gegg, Stephen R.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager
York, Amber D.Woods Hole Oceanographic Institution (WHOI BCO-DMO)BCO-DMO Data Manager


Coverage

Spatial Extent: N:-0.14065 E:-90.23696 S:-0.74908 W:-91.32879

Dataset Description

This dataset contains subtidal temperature data from 2015 to 2016 at sites in the central Galapagos Islands, Ecuador at depths of 6-15 m.

Approximate sampling location:
Eastern Tropical Pacific, Galapagos Islands, Ecuador 


Acquisition Description

Temperature data collected by Onset Tidbit temperature loggers (http://www.onsetcomp.com/products/ data-loggers/utbi-001) at 10-minute intervals. Loggers were attached to subtidal rock walls at 6-15 m depth. The temperature loggers have an accuracy of 0.2 degrees C.


Processing Description

Data Processing:
Data are raw, with no processing.

BCO-DMO Processing Notes
- Generated from original .csv file: galapagos_temperatures_20150107-20150715.csv contributed by Franz Smith
- Parameter names edited to conform to BCO-DMO naming convention found at Choosing Parameter Name
- "time" header changed to "Date" since no times were included with the data
- Date reformatted to YYYYMMDD
- Added ISO Date format generated from Date and Time values
- Data version 10 Feb 2017 replaces version 03 Dec 2015 and includes more temperature deployments extending into 2016 and also includes data from additional sites.
- Data format updated to accommodate new data.  Depth stripped from previous site names and added to new "depth" parameter to match new data.  
- Data sorted so it can be viewed by site.
- Added two new deployments 


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Parameters

ParameterDescriptionUnits
siteSite text
dateDate of Measurement in format yyyy-mm-dd (UTC) Date (UTC) in format yyyy-mm-dd
tempTemperature degrees Celsius
timeTime of measurement in format HH:MM (UTC) unitless
depthDepth of temperature logger meters
deploymentDeployment name (made from date range) unitless
latSite Latitude (South is negative) decimal degrees
lonSite Longitude (West is negative) decimal degrees
ISO_DateTime_UTCISO timestamp based on the ISO 8601:2004(E) standard in format YYYY-mm-ddTHH:MM:SS[.xx]Z (UTC) unitless


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Instruments

Dataset-specific Instrument Name
Onset Tidbit temperature logger
Generic Instrument Name
Onset HOBO TidbiT v2 (UTBI-001) temperature logger
Dataset-specific Description
Temperature data collected by Onset Tidbit temperature loggers (http://www.onsetcomp.com/products/ data-loggers/utbi-001) at 10 minute intervals. Loggers were attached to subtidal rock walls at 12-15 m depth. The temperature loggers have an accuracy of 0.2 degrees C.
Generic Instrument Description
A temperature logger that measures temperatures over a wide temperature range. It is designed for outdoor and underwater environments and is waterproof to 300 m. A solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 or M-RSA Solar Radiation Shield). With an operational temperature range between -20 degrees Celsius and +70 degrees Celsius, the TidbiT v2 has an accuracy of +/-0.21 and a resolution of 0.02 degrees Celsius.


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Deployments

RAPDGALPGS_Champion-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-07
End Date
2015-07-12
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Champion Site, 15 meter depth

RAPDGALPGS_Cuatro_Hermanos-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-07
End Date
2015-07-13
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Cuatro Hermanos Site, 15 meter depth

RAPDGALPGS_Islote_Gardner-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-07
End Date
2015-07-12
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Islote Gardner Site, 15 meter depth

RAPDGALPGS_Las_Cuevas-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-07
End Date
2015-07-12
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Las Cuevas Site, 15 meter depth

RAPDGALPGS_La_Botella-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-07
End Date
2015-07-13
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - La Botella Site, 15 meter depth

RAPDGALPGS_Pinzon-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-07
End Date
2015-07-14
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Pinzon Site, 15 meter depth

RAPDGALPGS_Rocas_Beagle-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-09
End Date
2015-07-14
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Rocas Beagle Site, 15 meter depth

RAPDGALPGS_Daphne_Menor-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-09
End Date
2015-07-15
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Daphne Menor Site, 15 meter depth

RAPDGALPGS_Guy_Fawkes-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-08
End Date
2015-07-15
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Guy Fawkes Site, 15 meter depth

RAPDGALPGS_Champion-12m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-07
End Date
2015-07-12
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Champion Site, 12 meter depth

RAPDGALPGS_Daphne_Menor-6m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-01-09
End Date
2015-07-15
Description
Subtidal temperature data from 2015 at sites in the central Galápagos Islands (12-15 m depth), Ecuador - Daphne Menor Site, 6 meter depth

RAPDGALPGS_Rocas_Gordon-15m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-07-15
End Date
2016-01-09

RAPDGALPGS_Cousins-6m

Website
Platform
RAPDGALPGS Temperatures
Start Date
2015-07-22
End Date
2016-07-21


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Project Information

RAPID: Understanding Thresholds and regime shifts in marine ecosystems: effects of the 2014-2015 El Nino in the Galapagos rocky subtidal (RAPDGALPGS)


Coverage: Eastern Tropical Pacific, Galapagos Islands: 00.41100 S, 90.27525 W


The question addressed in this project is: Does the 2014-2015 El Niño cause a regime shift in Galapagos subtidal ecosystems? And if so, what thresholds are crossed to drive the change from rocky subtidal communities with abundant corals to a barnacle dominated regime? Regime shifts are non-linear "ecological surprises" in the sense that the endpoint is not predictable as a linear outcome of a driver variable. The working hypothesis for this project is that the forthcoming 2014-2015 El Niño will create non-linear effects that are negative for corals which bleach during extreme temperature variability of the El Niño Southern Oscillation (ENSO), but are positive for the benthic (bottom dwelling) food chain dependent on barnacles for food. The specific work in the Galapagos will contribute to the general understanding of non-linear effects of climate stress in marine ecosystems, which has been highlighted as a critical information gap needed to understand the effects of climate change on ecosystems. The study will also inform best practices for the conservation of corals, which are threatened worldwide by multiple stressors and cumulative direct, and indirect impacts. 

Perturbations such as El Niños can drive ecosystems to a tipping point as thresholds are exceeded and a sudden transition to a different state (regime) occurs. Since the frequency of extreme El Niños is projected to increase with climate change, there is a pressing need to develop a more comprehensive understanding of how ENSOs affect marine communities in the context of climate change. Currently, the National Oceanic and Atmospheric Administration (NOAA) Climate Prediction Center predicts a 70-80 % chance of an El Niño occurring during the northern hemisphere summer-winter of 2014-2015. This project leverages an existing quantitative baseline on benthic community structure in the Galapagos subtidal to address 12 predictions about community-ecosystem level impacts of the oncoming 2014-2015 El Niño. The research employs an observational-experimental approach to test the predictions and to discern if additional bleaching stress to corals and further increases in barnacles associated with this ENSO ultimately leads to an ecosystem state (regime) characterized by declining coral populations and increasing barnacles and their predators.



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Funding

Funding SourceAward
NSF Division of Ocean Sciences (NSF OCE)

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