Cascading effects of global climate change on near shore benthic communities in the Antarctic
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 f...
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Australian Antarctic Data Centre
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Online Access: | https://researchdata.ands.org.au/cascading-effects-global-communities-antarctic/699841 https://doi.org/10.4225/15/5747E5A937DC9 https://data.aad.gov.au/metadata/records/ASAC_2300 http://nla.gov.au/nla.party-617536 |
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ftands:oai:ands.org.au::699841 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans ANIMALS/INVERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION SPONGES MICROALGAE PLANTS MACROALGAE (SEAWEEDS) ZOOPLANKTON BIOSPHERE AQUATIC ECOSYSTEMS PLANKTON PHYTOPLANKTON EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC SPECIES PREDATION ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS GRAZING DYNAMICS/PLANT HERBIVORY ANTARCTICA BENTHIC COMMUNITIES CLIMATE CHANGE coralline ultraplankton quadrats transects Thermistors FLOW CYTOMETRY FIELD SURVEYS FIELD INVESTIGATION CONTINENT > GEOGRAPHIC REGION > POLAR |
spellingShingle |
biota oceans ANIMALS/INVERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION SPONGES MICROALGAE PLANTS MACROALGAE (SEAWEEDS) ZOOPLANKTON BIOSPHERE AQUATIC ECOSYSTEMS PLANKTON PHYTOPLANKTON EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC SPECIES PREDATION ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS GRAZING DYNAMICS/PLANT HERBIVORY ANTARCTICA BENTHIC COMMUNITIES CLIMATE CHANGE coralline ultraplankton quadrats transects Thermistors FLOW CYTOMETRY FIELD SURVEYS FIELD INVESTIGATION CONTINENT > GEOGRAPHIC REGION > POLAR Cascading effects of global climate change on near shore benthic communities in the Antarctic |
topic_facet |
biota oceans ANIMALS/INVERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION SPONGES MICROALGAE PLANTS MACROALGAE (SEAWEEDS) ZOOPLANKTON BIOSPHERE AQUATIC ECOSYSTEMS PLANKTON PHYTOPLANKTON EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC SPECIES PREDATION ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS GRAZING DYNAMICS/PLANT HERBIVORY ANTARCTICA BENTHIC COMMUNITIES CLIMATE CHANGE coralline ultraplankton quadrats transects Thermistors FLOW CYTOMETRY FIELD SURVEYS FIELD INVESTIGATION CONTINENT > GEOGRAPHIC REGION > POLAR |
description |
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 Antarctica 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 |
author2 |
PILE, ADELE (hasPrincipalInvestigator) PILE, ADELE (processor) Australian Antarctic Data Centre (publisher) |
format |
Dataset |
title |
Cascading effects of global climate change on near shore benthic communities in the Antarctic |
title_short |
Cascading effects of global climate change on near shore benthic communities in the Antarctic |
title_full |
Cascading effects of global climate change on near shore benthic communities in the Antarctic |
title_fullStr |
Cascading effects of global climate change on near shore benthic communities in the Antarctic |
title_full_unstemmed |
Cascading effects of global climate change on near shore benthic communities in the Antarctic |
title_sort |
cascading effects of global climate change on near shore benthic communities in the antarctic |
publisher |
Australian Antarctic Data Centre |
url |
https://researchdata.ands.org.au/cascading-effects-global-communities-antarctic/699841 https://doi.org/10.4225/15/5747E5A937DC9 https://data.aad.gov.au/metadata/records/ASAC_2300 http://nla.gov.au/nla.party-617536 |
op_coverage |
Spatial: northlimit=-65.0; southlimit=-68.0; westlimit=62.0; eastLimit=110.0; projection=WGS84 Temporal: From 2003-09-30 to 2005-03-31 |
long_lat |
ENVELOPE(62.0,110.0,-65.0,-68.0) |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Australian Antarctic Data Centre |
op_relation |
https://researchdata.ands.org.au/cascading-effects-global-communities-antarctic/699841 5148eccd-51ca-4a47-97cd-9325db58691e doi:10.4225/15/5747E5A937DC9 ASAC_2300 https://data.aad.gov.au/metadata/records/ASAC_2300 http://nla.gov.au/nla.party-617536 |
op_doi |
https://doi.org/10.4225/15/5747E5A937DC9 |
_version_ |
1766245857534935040 |
spelling |
ftands:oai:ands.org.au::699841 2023-05-15T13:46:57+02:00 Cascading effects of global climate change on near shore benthic communities in the Antarctic PILE, ADELE (hasPrincipalInvestigator) PILE, ADELE (processor) Australian Antarctic Data Centre (publisher) Spatial: northlimit=-65.0; southlimit=-68.0; westlimit=62.0; eastLimit=110.0; projection=WGS84 Temporal: From 2003-09-30 to 2005-03-31 https://researchdata.ands.org.au/cascading-effects-global-communities-antarctic/699841 https://doi.org/10.4225/15/5747E5A937DC9 https://data.aad.gov.au/metadata/records/ASAC_2300 http://nla.gov.au/nla.party-617536 unknown Australian Antarctic Data Centre https://researchdata.ands.org.au/cascading-effects-global-communities-antarctic/699841 5148eccd-51ca-4a47-97cd-9325db58691e doi:10.4225/15/5747E5A937DC9 ASAC_2300 https://data.aad.gov.au/metadata/records/ASAC_2300 http://nla.gov.au/nla.party-617536 Australian Antarctic Data Centre biota oceans ANIMALS/INVERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION SPONGES MICROALGAE PLANTS MACROALGAE (SEAWEEDS) ZOOPLANKTON BIOSPHERE AQUATIC ECOSYSTEMS PLANKTON PHYTOPLANKTON EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > BENTHIC SPECIES PREDATION ECOLOGICAL DYNAMICS SPECIES/POPULATION INTERACTIONS GRAZING DYNAMICS/PLANT HERBIVORY ANTARCTICA BENTHIC COMMUNITIES CLIMATE CHANGE coralline ultraplankton quadrats transects Thermistors FLOW CYTOMETRY FIELD SURVEYS FIELD INVESTIGATION CONTINENT > GEOGRAPHIC REGION > POLAR dataset ftands https://doi.org/10.4225/15/5747E5A937DC9 2020-01-05T21:16:44Z 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 Antarctica 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 Dataset Antarc* Antarctic Antarctica Research Data Australia (Australian National Data Service - ANDS) Antarctic The Antarctic ENVELOPE(62.0,110.0,-65.0,-68.0) |