2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/08/2017 | 9:45 AM - 10:00 AM | PATTERNS AND DRIVERS OF ARID LAND AQUATIC MICROBIAL COMMUNITIES | 305B
PATTERNS AND DRIVERS OF ARID LAND AQUATIC MICROBIAL COMMUNITIES
Aridification has driven significant environmental change in central Australia over millennia. Most of the Australian continent did not undergo Pleistocene glaciation, as experienced in the Northern Hemisphere. Instead, ongoing aridification has resulted in perennial freshwater systems in the arid interior being restricted to isolated groundwater-fed springs and a network of intermittently flowing rivers which contain isolated waterholes for most of each year. We recently completed the first study of the microbiomes of arid land springs and riverine waterholes. Our results suggest that local, rather than landscape, processes appear to be an important driver of community composition at these sites. We found that the composition of biofilm microbial communities varied greatly within a site, whilst the water column microbial communities were more homogenous and displayed considerable site fidelity. These results are in direct contrast with studies in Northern Hemisphere temperate streams where streambed biofilm microbial communities are less diverse than stream water microbial communities. A much larger spatial study (over the entire arid biome) is now planned to better understand the patterns and processes driving arid land aquatic microbial communities.
- C11 Community Ecology
- C18 Biodiversity
- C04 Microbial Ecology
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Presenters/Authors
Jenny Davis
(), Charles Darwin University, Jenny.Davis@cdu.edu.au;
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Mirjam Kaestli
(), Charles Darwin University, Mirjam.Kaestli@cdu.edu.au;
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Niels Munksgaard
(), Charles Darwin University, Niels.Munksgaard@cdu.edu.au;
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Karen Gibb
(), Charles Darwin University, Karen.Gibb@cdu.edu.au;
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