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Biotic interactions in Antarctic terrestrial ecosystems: Are they a factor? |
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| Authors: | Ian D Hogg S Craig Cary Kevin K Newsham Byron J Adams Francesco Frati Diana H Wall |
| Institution: | a Department of Biological Sciences, University of Waikato, Private Bag 3105, Hamilton, New Zealand b British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK c Institute for Research on Environment and Sustainability, Devonshire Building, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK d Microbiology and Molecular Biology Department, and Evolutionary Ecology Laboratories, Brigham Young University, 775 WIDB, Provo, UT 84602, USA e Landcare Research, Private Bag 3127, Hamilton, New Zealand f Department of Evolutionary Biology, University of Siena, via A. Moro 2, 53100 Siena, Italy g Allan Wilson Centre for Molecular Ecology and Evolution, Massey University, Private Bag 11-222, Palmerston North, New Zealand h Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523-1499, USA |
| Abstract: | Antarctic terrestrial ecosystems are noted for their relative simplicity and limited trophic structure. In this context, knowledge of biotic interactions in structuring terrestrial soil communities would seem beneficial from a theoretical perspective as well as from a conservation perspective. Unfortunately, although biotic interactions are generally seen as being insignificant in these unique ecosystems, this view is based upon few explicit studies and very little is known of the role that biotic interactions may play. Accordingly, we review our current understanding of these interactions, including analogues from other appropriate ecosystems. On the basis of this review, we conclude that: (1) Antarctic terrestrial systems are predominantly abiotically-driven systems; and (2) a network of manipulative field and laboratory experiments are needed for establishing any role for biotic interactions in structuring Antarctic soil environments. |
| Keywords: | Biotic interactions Antarctica Soil ecology Terrestrial ecosystems Invertebrates Microbiology Lichens Abiotic factors |
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