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https://hdl.handle.net/2440/51803
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Type: | Journal article |
Title: | Disturbance mediates the effects of nutrients on developing assemblages of epibiota |
Author: | Valdivia, N. Stehbens, J. Hermelink, B. Connell, S. Molis, M. Wahl, M. |
Citation: | Austral Ecology: a journal of ecology in the Southern Hemisphere, 2008; 33(8):951-962 |
Publisher: | Blackwell Science Asia |
Issue Date: | 2008 |
ISSN: | 1442-9985 1442-9993 |
Statement of Responsibility: | Nelson Valdivia, Jarrod D. Stehbens, Björn Hermelink, Sean D. Connell, Markus Molis and Martin Wahl |
Abstract: | Local dynamics such as resource enhancement (e.g. nutrient supply) and stochastic events of destruction (disturbances that provide new space) are hypothesized to counteractively affect species diversity and composition. We tested the independent and interactive effects of nutrients and disturbance on the development of assemblages of epibiota attached to vertical surfaces in an oligotrophic system. Nutrient concentrations were manipulated at three levels (ambient, medium and high) while disturbance was manipulated by removing biomass at seven frequencies (0×, 2×, 3×, 4×, 5×, 7×, 12×). Nutrient and disturbance regimes had opposing effects on diversity such that species richness increased with resource enhancement (nutrients) and declined with disturbance. These results support the model that increased heterogeneity of distribution of limiting resources allows the coexistence of species with low and high resource requirements. |
Keywords: | bottom-up disturbance diversity marine nutrient top-down |
Description: | © 2008 Ecological Society of Australia |
DOI: | 10.1111/j.1442-9993.2008.01866.x |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1111/j.1442-9993.2008.01866.x |
Appears in Collections: | Aurora harvest Earth and Environmental Sciences publications Environment Institute Leaders publications |
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