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http://hdl.handle.net/10773/28473
Title: | Disturbance and change in biodiversity |
Author: | Dornelas, Maria |
Keywords: | Perturbation Species richness Neutral model Stress Threat Diversity |
Issue Date: | 27-Nov-2010 |
Publisher: | The Royal Society |
Abstract: | Understanding how disturbance affects biodiversity is important for both fundamental and applied reasons. Here, I investigate how disturbances with different ecological effects change biodiversity metrics. I define three main types of disturbance effects: D disturbance (shifts in mortality rate), B disturbance (shifts in reproductive rates) and K disturbance (shifts in carrying capacity). Numerous composite disturbances can be defined including any combination of these three types of ecological effects. The consequences of D, B and K disturbances, as well as of composite DBK disturbances are examined by comparing metrics before and after a disturbance, in disturbed and undisturbed communities. I use simulations of neutral communities and examine species richness, total abundance and species abundance distributions. The patterns of change in biodiversity metrics are consistent among different types of disturbance. K disturbance has the most severe effects, followed by D disturbance, and B disturbance has nearly negligible effects. Consequences of composite DBK disturbances are more complex than any of the three types of disturbance, with unimodal relationships along a disturbance gradient arising when D, B and K are negatively correlated. Importantly, regardless of disturbance type, community isolation enhances the negative consequences and hinders the positive effects of disturbances. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/28473 |
DOI: | 10.1098/rstb.2010.0295 |
ISSN: | 0080-4622 |
Appears in Collections: | CESAM - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Dornelas - 2010 - Disturbance and change in biodiversity.pdf | 665.12 kB | Adobe PDF |
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