Cascading effects of global climate change on near shore benthic communities in the Antarctic

Federal Geographic Data Committee (FGDC) Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Unknown
Publication_Date: Unknown
Title: Cascading effects of global climate change on near shore benthic communities in the Antarctic
Description:
Abstract:
Metadata record for data from ASAC Project 2300 See the link below for public details on this project. ---- Public Summary from Project---- Antarctic reefs, like their tropical counterparts, harbour a high diversity of animal life. For the first time we will determine how global warming will affect food availability to the animals which comprise the structural components of the reefs. Ultimately, we wish to predict the cascading effect through the community as one component changes. With the confirmation that sponges in Antarctic waters graze on ultraplankton there is now a global overview that sponges are the primary benthic organism that is responsible for linking the pelagic microbial food web to the benthos. Like other shallow water demosponges, sponges in Antarcticia are omnivorous sponges that graze nonselectively, consuming both heterotrophic and phototrophic organisms. Retention efficiencies of ultraplankton are similar to other sponges measured using similar techniques from shallow water to the deep sea, the tropics to boreal waters. The large amounts of water processed by these benthic suspension feeders and their diet places these sponges squarely within the functional group of organisms that link the pelagic microbial food web to the benthos. The number of macroinvertebrates that have been shown to side- step the microbial loop and directly utilize the base of the microbial food web as a primary food source is ever growing and currently includes demosponges, ascidians, soft corals, and bivalves. Dense macroinvertebrate communities dominated by demosponges and corals in shallow water have been shown to remove as much as 90% of the ultraplankton from the water that passes over them. The daily fluxes of ultraplankton to these communities ranges from 9 to 1970 mg C day-1 m-2. We conservatively estimate that this single species of sponge, which comprises only a portion of the benthos, mediates a flux of 444 mg mg C day-1 m-2 from the water column, which places it in the range of shallow-water temperate and boreal systems. Furthermore, we found that physical disturbance results in changes in community structure. The subtidal rocky coasts near Casey are similar to many of the exposed rocky coasts of the world that support extensive stands of macroalgae that form a strong positive association with understorey encrusting coralline algae. Loss of canopies of algae on temperate coasts often triggers large and predictable changes to the assemblage of understorey taxa. We observed large negative effects of removing canopies of H. grandifolius on encrusting corallines growing beneath, with such effects consistent with predictions of previous research on tropical and temperate coasts. However, elevating concentrations of nutrients did not greatly reduce the magnitude of the negative effects of canopy removal. Nevertheless, our results suggest that disturbance (removal) to canopies of H. grandifolius has large consequences for those organisms associated with this widely distributed (circumpolar) species of canopy-forming algae. See the full copy of the final report (available for download from the URL given below) for more information. Also included in the download file, are five Excel spreadsheets. The spreadsheets contain the data collected from the transects, quadrats, etc (see the final report for more information). Where possible the spreadsheets have been converted to csv files. The fields in this dataset are: Location depth Species Transect Quadrat Irradiance PAR
Purpose:
Not Available
Supplemental_Information:
REFERENCE: Irving, A. D., S. D. Connell, E. L. Johnston, A. J. Pile, B. M. Gillanders. 2005 The response of encrusting coralline algae to canopy loss: an independent test of predictions on an Antarctic coast. Marine Biology 144 361-368
Supplemental_Information:
REFERENCE: Pile, AJ, EL Johnston, SD Connell and BM Gillanders. December 2005 Benthic-pelagic coupling of the microbial food web by Antarctic sponges Targeted for Marine Ecology Progress Series
Supplemental_Information:
REFERENCE: Johnston EL, SD Connell, AD Irving, AJ Pile and BM Gillanders December 2005 Characterising shallow rocky-reef assemblages from the Windmill Islands coast, East Antarctica Targeted for Polar Biology
Supplemental_Information:
REFERENCE: Connell, SD, EL Johnston, AD Irving, TE Wernberg, BM Gillanders, BD Russell, AJ Pile May 2006 How do the understorey assemblages at the Windmill Islands of Antarctica compare to those in Australia? Targeted for Polar Biology
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20030930
Ending_Date: 20050331
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: 62.0
East_Bounding_Coordinate: 110.0
North_Bounding_Coordinate: -65.0
South_Bounding_Coordinate: -68.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: GCMD SCIENCE PARAMETERS
Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ANCILLARY KEYWORDS
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > SPONGES
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MICROALGAE
Theme_Keyword: EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PLANTS > MACROALGAE (SEAWEEDS)
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON > ZOOPLANKTON
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > PLANKTON
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > SPECIES PREDATION
Theme_Keyword: EARTH SCIENCE > BIOSPHERE > ECOLOGICAL DYNAMICS > SPECIES/POPULATION INTERACTIONS > GRAZING DYNAMICS/PLANT HERBIVORY
Theme_Keyword: FIELD SURVEYS
Theme_Keyword: FIELD INVESTIGATION
Theme_Keyword: THERMISTORS
Theme_Keyword: FLOW CYTOMETRY
Theme_Keyword: Antarctica
Theme_Keyword: Benthic Communities
Theme_Keyword: Climate Change
Theme_Keyword: Sponges
Theme_Keyword: Coralline
Theme_Keyword: Ultraplankton
Theme_Keyword: Quadrats
Theme_Keyword: Transects
Theme_Keyword: BIOTA
Theme_Keyword: OCEANS
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: These data and a copy of the final report are available for download from the URL given below.
Use_Constraints:
This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at the URL below when using these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ADELE PILE
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: School Of Biological Sciences
Address: University of Sydney
Address: RM 202A HAYDON-LAURENCE BLDG A08
City: Sydney
State_or_Province: New South Wales
Postal_Code: 2006
Country: Australia
Contact_Voice_Telephone: +61 2 9351 2440
Contact_Facsimile_Telephone: +61 2 9351 2558
Contact_Electronic_Mail_Address: apile@bio.usyd.edu.au
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Values provided in temporal and spatial coverage are approximate only. This record has been updated by staff at the Australian Antarctic Data Centre (rather than the listed investigator), and therefore it's accuracy and quality cannot be guaranteed. See the final report at the URL below for full and accurate information.
Logical_Consistency_Report:
Not Available
Completeness_Report:
Not Available
Lineage:
Process_Step:
Process_Description:
Not Available
Process_Date: Unknown
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Spatial_Reference_Information:
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: AU/AADC > Australian Antarctic Data Centre, Australia
Contact_Person: DATA OFFICER AADC
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Australian Antarctic Division
Address: 203 Channel Highway
City: Kingston
State_or_Province: Tasmania
Postal_Code: 7050
Country: Australia
Contact_Voice_Telephone: +61 3 6232 3244
Contact_Facsimile_Telephone: +61 3 6232 3351
Contact_Electronic_Mail_Address: metadata@aad.gov.au
Resource_Description: ASAC_2300
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: word, csv, excel
Transfer_Size: 24 kb
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/portal/download_file.c...
Access_Instructions:
Download point for the data - final report and data
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
https://secure3.aad.gov.au/proms/public/projects/r...
Access_Instructions:
Public information for ASAC project 2300
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://data.aad.gov.au/aadc/metadata/citation.cfm?...
Access_Instructions:
Citation reference for this metadata record and dataset
Fees: Free
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Metadata_Reference_Information:
Metadata_Date: 20030526
Metadata_Review_Date: 20140829
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: ADELE PILE
Contact_Position: INVESTIGATOR
Contact_Position: TECHNICAL CONTACT
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: School Of Biological Sciences
Address: University of Sydney
Address: RM 202A HAYDON-LAURENCE BLDG A08
City: Sydney
State_or_Province: New South Wales
Postal_Code: 2006
Country: Australia
Contact_Voice_Telephone: +61 2 9351 2440
Contact_Facsimile_Telephone: +61 2 9351 2558
Contact_Electronic_Mail_Address: apile@bio.usyd.edu.au
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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