http://lod.bco-dmo.org/id/dataset/732651
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2018-03-29
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Barnacle (Megabalanus peninsularis) cover in the central Galápagos Islands, Ecuador from Jan 2016 to Jan 2017
2018-03-29
publication
2018-03-29
revision
BCO-DMO Linked Data URI
2018-03-29
creation
http://lod.bco-dmo.org/id/dataset/732651
Jon D. Witman
Brown University
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Witman, J. D. (2018) Barnacle (Megabalanus peninsularis) cover in the central Galápagos Islands, Ecuador from Jan 2016 to Jan 2017. Biological and Chemical Oceanography Data Management Office (BCO-DMO). Version Date 2018-03-29 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/732651 [access date]
Central Galapagos subtidal temperatures Dataset Description: <p>This dataset contains barnacle (<em>Megabalanus&nbsp;peninsularis)</em>&nbsp;cover in the central Galápagos Islands, Ecuador from Jan 2016 to Jan 2017.</p> Methods and Sampling: <p>The proportion of barnacle cover is derived from 0.25 m2 photoquadrats using point-intersect methodology.</p>
<p>Photoquadrat methodology is described in Witman (1985) was adapted for a digital photographic system using a Sony alpha7 24 Megapixel camera in a Nauticam Underwater housing with the Nikkor 15 mm underwater lens.&nbsp;Images were analyzed by overlaying a random grid of points over the digital&nbsp;photoquadrat&nbsp;image, recording the proportion of points occupied by&nbsp;<em>Megabalanus&nbsp;peninsularis</em>.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1623867 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1623867
onGoing
Jon D. Witman
Brown University
401-863-3936
Ecology and Evolutionary Biology Department Box G-W Brown University
Providence
RI
02912
USA
Jon_Witman@brown.edu
pointOfContact
asNeeded
Unknown
Site
Lat
Lon
Date
Quadrat_Number
proportion_barnacles
Sony alpha7
theme
None, User defined
site
latitude
longitude
sample description
No BCO-DMO term
featureType
BCO-DMO Standard Parameters
Camera
instrument
BCO-DMO Standard Instruments
RAPDGALPGS_sites
service
Deployment Activity
Galapagos Islands, Ecuador
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
RAPID: Testing the ability of the 2015-2017 El Nino Southern Oscillation (ENSO) to drive a community-level regime shift in the Galapagos marine ecosystem
http://www.witmanlab.com/responses-to-el-nintildeo-events-in-galapagos-subtidal-ecosystems.html
RAPID: Testing the ability of the 2015-2017 El Nino Southern Oscillation (ENSO) to drive a community-level regime shift in the Galapagos marine ecosystem
<p><strong>NSF Award Abstract:</strong><br />
Changes in the ecological structure, biodiversity and functioning of ecosystems have occurred in all types of habitats. Sometimes the change is so large and abrupt that the ecosystem switches to an alternate state, or regime, that persists for long periods of time (i.e. decades to millennia) such as the switch between a vegetated and desert ecosystem in the Sahara. Since regime changes may drastically alter the ecosystem goods and services provided to humankind, there is a practical as well as theoretical need to understand the conditions and drivers leading to tipping points between alternate regimes. To date, little is known about either the pre-conditions or drivers of regime change, particularly in subtidal habitats where long-term data on the ecological state of communities of interacting species prior to regime change is difficult to obtain. Most of the knowledge about tropical regime shifts in marine habitats has focused on shifts between corals and macroalgae even though these organisms represent only part of a species-rich ecosystem with many possible trajectories and outcomes of regime change. Consequently, the overarching goal of the proposed investigation is to test a conceptual model developed herein predicting how both El Niño and La Niña phases of the unusually strong 2016 ENSO (El Niño Southern Oscillation) may drive a regime shift in the Galapagos rocky subtidal at the whole community level. As the target community involves sponges as a key component, in addition to barnacles, Crustose Coralline Algae (CCA), corals, sea urchins, sea stars and predatory fish, the model tests predictions from the Sponge Reef Hypothesis (SRH), an emerging paradigm predicting that sponges may increasingly dominate space as corals decline from future climate change (representing a coral to sponge regime change). Preliminary data indicate that counter to the SRH, sponges declined during the unusually warm temperatures at the outset of the present ENSO in Galapagos subtidal communities. However, sea urchin predation on sponges and CCA appears to have accelerated at the same time, so manipulative field experiments are proposed to rigorously test and differentiate the effects of ENSO elevated temperature on sponge mortality from the effects of enhanced sea urchin predation on sponges. These experimental results will be evaluated in the context of actual, long-term (13-16 year) changes in the whole community obtained by quantitative re-sampling of the benthic community at 12 sites in the central Galapagos throughout the present ENSO. Re-sampling this baseline will also enable the analysis of indicators leading up to the hypothesized regime change. Broader educational impacts of the project will transpire at all levels from high school students to graduate students and the public.</p>
<p>Although regime changes have been described as abrupt shifts to alternate, persistent states in many ecosystems in response to natural or anthropogenic drivers, research on regime change in bottom-dwelling communities of tropical oceans has largely focused on a switch from coral-dominated to macroalgal- dominated regimes. This narrow focus overlooks potential influences of the diverse assemblages of sessile invertebrates such as sponges that share space on the hard substrate of reefs with corals and could proliferate as a new regime if corals are diminished. The SRH is an emerging community ecological paradigm that posits that sponges may increasingly dominate space as corals decline from future climate change and ocean acidification, yet it has not been rigorously tested. The exceptionally strong El Niño occurring in the Galapagos Islands presents a unique opportunity evaluate the potential for climate oscillations to create regime shifts at the community level and to test the SRH because subtidal benthic community structure has been quantified at least annually since 1999 at multiple sites in the central Galapagos Islands. Recent 2015 surveys indicated significant mortality of sponges at multiple sites coincident with the present El Niño warming, counter to the SRH. However, sea urchin predation on sponges and Crustose Coralline Algae (CCA) appears to have accelerated at the same time, so manipulative field experiments are proposed to rigorously test and differentiate the effects of ENSO elevated temperature on sponge mortality from the effects of enhanced sea urchin predation on sponges. More specifically, eight main hypotheses along with four alternate hypotheses are developed and proposed from a new conceptual model predicting direct and indirect pathways of regime change in a community of CCA, sponges, barnacles, corals, sea urchins, sea stars and predatory fish. The research will be performed in the rocky subtidal at the 12 community baseline sites in the central Galapagos archipelago during four trips in 2016-2017 bracketing the El Niño and La Niña phases. The proposed combination of experimental and observational (i.e. baseline re-sampling) methods will enable a rigorous evaluation of climate-induced direct and indirect pathways of regime change in tropical benthic ecosystems.</p>
SPONGERAPDGALPGS
largerWorkCitation
project
eng; USA
oceans
Galapagos Islands, Ecuador
-91.32879
-90.23696
-0.74908
-0.14065
2016-01-06
2017-01-26
Eastern Tropical Pacific, Galápagos Islands, Ecuador (00.41100 S, 90.27525 W)
0
BCO-DMO catalogue of parameters from Barnacle (Megabalanus peninsularis) cover in the central Galápagos Islands, Ecuador from Jan 2016 to Jan 2017
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/732675.rdf
Name: Site
Units: unitless
Description: <p>Site name</p>
http://lod.bco-dmo.org/id/dataset-parameter/732676.rdf
Name: Lat
Units: decimal degrees
Description: <p>Latitude of site</p>
http://lod.bco-dmo.org/id/dataset-parameter/732677.rdf
Name: Lon
Units: decimal degrees
Description: <p>Longitude of site</p>
http://lod.bco-dmo.org/id/dataset-parameter/732678.rdf
Name: Date
Units: unitless
Description: <p>Date of sampling (UTC-6) in format yyyy-mm-dd</p>
http://lod.bco-dmo.org/id/dataset-parameter/732679.rdf
Name: Quadrat_Number
Units: unitless
Description: <p>Replicate number of 0.25 m^2 photographic quadrat</p>
http://lod.bco-dmo.org/id/dataset-parameter/732680.rdf
Name: proportion_barnacles
Units: dimensionless
Description: <p>Proportion of quadrat occupied by Megabalanus barnacles derived from point-intersect methodology</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
22422
https://datadocs.bco-dmo.org/file/VJJWq7Nhl2j61n/barnacles.csv
barnacles.csv
Primary data file for dataset ID 732651
download
https://osprey.bco-dmo.org/dataset/732651/data/download
download
onLine
dataset
<p>The proportion of barnacle cover is derived from 0.25 m2 photoquadrats using point-intersect methodology.</p>
<p>Photoquadrat methodology is described in Witman (1985) was adapted for a digital photographic system using a Sony alpha7 24 Megapixel camera in a Nauticam Underwater housing with the Nikkor 15 mm underwater lens.&nbsp;Images were analyzed by overlaying a random grid of points over the digital&nbsp;photoquadrat&nbsp;image, recording the proportion of points occupied by&nbsp;<em>Megabalanus&nbsp;peninsularis</em>.</p>
Specified by the Principal Investigator(s)
<p>Data are raw, with no processing.</p>
<p>BCO-DMO Data Manager Processing Notes:<br />
* added a conventional header with dataset name, PI name, version date<br />
* modified parameter names to conform with BCO-DMO naming conventions<br />
* "NA" values replaced with no data value 'nd' for "no data"&nbsp;<br />
* site positions added from dataset: &nbsp;<a href="https://www.bco-dmo.org/dataset/628159">https://www.bco-dmo.org/dataset/628159</a><br />
* site names modified to match site list format and other datasets in this project:<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Daphne -&gt; Daphne Menor<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Roca Cousins -&gt; Cousins<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Baltra -&gt; North Baltra<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Gardner -&gt; Islote Gardner</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Sony alpha7
Sony alpha7
PI Supplied Instrument Name: Sony alpha7 PI Supplied Instrument Description:Sony alpha7 24 Megapixel camera in a Nauticam Underwater housing with the Nikkor 15 mm underwater lens Instrument Name: Camera Instrument Short Name:camera Instrument Description: All types of photographic equipment including stills, video, film and digital systems. Community Standard Description: http://vocab.nerc.ac.uk/collection/L05/current/311/
Deployment: RAPDGALPGS_sites
RAPDGALPGS_sites
Galapagos_Islands
island
RAPDGALPGS_sites
Jon D. Witman
Brown University
Galapagos_Islands
island