2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 9:45 AM - 10:00 AM | DRIVING VARIABLES OF STREAM MACROINVERTEBRATE COMMUNITIES IN GREENLAND | 420 B
DRIVING VARIABLES OF STREAM MACROINVERTEBRATE COMMUNITIES IN GREENLAND
In Greenland, rivers are far less studied than lakes restricted to 60-70oN (low Arctic) in west Greenland and 70-74oN (high Arctic) in east Greenland. Benthic macroinvertebrates in rivers data consisted of 87 samples from 9 rivers in the low-subarctic area and 10 rivers in high arctic areas. Most samples were collected in the years 2013-2015 (Zackenberg), comprising a short timeseries, and 1982-85 (all other locations). Benthic macroinvertebrate biodiversity is difficult to evaluate due to variation in taxonomic details between studies. In rivers, one-way ANOVA showed a significant relationship between the ratio of EPT:Chironomidae and latitude (P=<0.01). EPT was only found below 65.6°N latitude. Winter snow pack extent was a major driver of macroinvertebrate community structure in Zackenberg. Chironomidae were the most abundant taxon, found in all rivers. However identification beyond Chironomidae was not undertaken in many studies, and thus true diversity within this group is unknown. Other taxa included Baetis, Apataniidae and Limnephilidae, Oligochaetae, Collembola, Nematoda and other Diptera. These data highlight our limited knowledge of freshwater systems in Greenland and show a need for taxonomic standardisation between studies to compare biodiversity and predict changes.
- Invertebrate
- Community
- Hydrology
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Presenters/Authors
Catherine Docherty
(), University of Birmingham, catherine.l.docherty@gmail.com;
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Victoria Milner
(), University of Worcester, v.milner@worc.ac.uk;
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Kirsten Seestern Christoffersen
(), Freshwater Biological Laboratory, University of Copenhagen, Depth of Arctic Biology, University Center in Svalbard, Norway, kchristoffersen@bio.ku.dk;
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