quantifying antarctic marine biodiversity and richness using scar-marbin huw griffiths bruno danis...
TRANSCRIPT
Quantifying Antarctic marine biodiversity and richness using
SCAR-MarBIN
Huw Griffiths Bruno Danis and Andrew Clarke
Overview• Methodology
•Taxonomic coverage
•Area of interest
•Geographic distribution
•Phylum level species and sampling distributions
•Major groups level species and sampling distributions
•Depth distributions
•Conclusions
•Polar Synthesis Macroscope Update
•Plea for help!
Methodology
• Cleaning of whole ANTOBIS database
• Depth data added to all benthic records using ETOPO2 data
• Species counts vs number of stations maps for each major phylum (nematoda, mollusca, cnidaria, echinodermata, chordata, arthropoda & annelida)
• Species counts vs number of stations maps for major groups: (fish, birds and mammals, pelagic & benthic)
• Depth analysis. Numbers of benthic stations & species by depth
SCAR-MarBIN & RAMS
0
10
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30
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% Species
% Records
Areas of interest
SCAR-MarBIN data distribution
All Species
Nematoda
Annelida
Cnidaria
Echinodermata
Mollusca
Chordata
Arthropoda
Summary
• Spatial & taxonomic coverage varies greatly between groups
• Major taxa “missing”: Sponges, Isopods, Pycnogonids, Bryozoans, Decapoda, Crinoidea & Brachiopoda
• Under-sampled & un-sampled areas: W. Weddell Sea, Amundsen Sea, deep sea
Benthic Species
Planktonic Species
Birds & Mammals
Fish
Summary• Bias towards shallow, presence of bases and ship routes
• Overall dataset: bird & mammal observations and tags dominate the station analysis
• Benthic data drives overall pattern of species richness
• Concurrence between benthic data hotspots and station presence
• Fish and CPR observation data drive pelagic data patterns
Depth Analysis
Conclusions• Sampling bias's drive many of the patterns• Depth bias, massive under sampling in deep water for
benthos• Well sampled areas and groups are suitable for
further analysis and predictions………..
Macroscope update
• 251 “Bi-polar” species- increased Arctic species list
• Physical classification of Ice-Oceans (benthic and pelagic)
• First comprehensive Arctic species list• Diversity modelling
Temperature Depth & Rugosity Distance FromShallows
Benthic classification
Pelagic classification
Plea for help……..
• New “bi-polar” species coordinator!• New sponge dataset!• More datasets needed for modelling and
phylogenetic analysis