Road networks predict human influence on Amazonian bird communities
Sadia E Ahmed1, Alexander C Lees2, Nárgila G Moura3
1Computational Science Laboratory, Microsoft Research, 21 Station Road, Cambridge CB1 2FB, UK Department of Life Sciences, Imperial College London, Silwood Park Campus, Ascot, Berkshire SL5 7PY, UK sadia@microsoft.com.
Proceedings. Biological Sciences
|October 3, 2014
Summary
Road networks significantly impact forest bird diversity and composition, even independently of habitat loss. Protecting roadless areas is crucial for conserving avian biodiversity in the Amazon.
Area of Science:
- Ecology
- Conservation Biology
- Environmental Science
Background:
- Road construction causes direct and indirect biodiversity loss, including mortality and habitat fragmentation.
- Previous research has not fully quantified road network impacts beyond general habitat loss.
Purpose of the Study:
- To assess the relationship between roadless volume and forest bird species richness and composition in the Brazilian Amazon.
- To determine if road networks impact biodiversity independently of forest cover.
Main Methods:
- Compared forest bird species richness and composition with roadless volume (RV) in hydrological catchments.
- Analyzed the correlation between RV and forest cover.
- Utilized variance partitioning to assess additive effects of RV and forest cover.
Main Results:
- A significant positive relationship was found between RV and forest bird richness and unique species.
- Forest bird community composition was significantly affected by RV.
- RV impacted biodiversity independently of forest cover, indicating additive effects.
Conclusions:
- Road networks negatively affect avian biodiversity through mechanisms beyond habitat loss, such as fragmentation and disturbance.
- Roadless volume is a valuable metric for assessing biodiversity impacts.
- Conservation strategies should consider both forest cover and road network metrics for effective biodiversity management.
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