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Are snake populations in widespread decline?
C J Reading1, L M Luiselli, G C Akani
1Centre for Ecology and Hydrology, Oxon, UK. cjr@ceh.ac.uk
Biology Letters
|June 11, 2010
Summary
Many snake populations are declining globally, impacting ecosystems. This study found sharp declines in 11 of 17 monitored snake populations across multiple countries, suggesting complex causes like climate change.
Area of Science:
- Herpetology
- Ecology
- Conservation Biology
Background:
- Global declines in vertebrate populations (fishes, amphibians, reptiles, birds, mammals) are increasingly documented.
- Amphibian and bird declines are recognized as global phenomena with often unclear etiologies.
- Snakes, as apex predators, play crucial roles in ecosystem functioning, making their population status a key indicator.
Purpose of the Study:
- To assess the population trends of various snake species across different geographic locations.
- To identify potential patterns or drivers of snake population changes.
Main Methods:
- Monitoring of 17 snake populations, encompassing eight species.
- Data collection from the United Kingdom, France, Italy, Nigeria, and Australia.
- Analysis of population trends over a defined period.
Main Results:
- Eleven of the 17 monitored snake populations exhibited sharp declines.
- Five populations remained stable, and one showed a marginal increase.
- Significant population reductions were observed across diverse geographic regions.
Conclusions:
- Snake population declines are a significant conservation concern, potentially affecting ecosystem stability.
- The causes of these declines are likely multifaceted, involving factors such as habitat degradation and prey availability.
- Global climate change is a suspected underlying factor contributing to these widespread declines.
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