Can management practices in rice fields contribute to amphibian conservation in southern Brazilian wetlands?
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Published source details
Machado I.F. & Maltchik L. (2010) Can management practices in rice fields contribute to amphibian conservation in southern Brazilian wetlands?. Aquatic Conservation: Marine and Freshwater Ecosystems, 20, 39-46.
Published source details Machado I.F. & Maltchik L. (2010) Can management practices in rice fields contribute to amphibian conservation in southern Brazilian wetlands?. Aquatic Conservation: Marine and Freshwater Ecosystems, 20, 39-46.
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This study is summarised as evidence for the following.
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Regulate water levels Action Link |
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Regulate water levels
A replicated, controlled study in 2005–2006 of rice fields in southern Brazil (Machado & Maltchik 2010) found that keeping fields flooded after harvest did not result in increased amphibian species richness or abundance, but did change species composition. Mean species richness and abundance did not differ between flooded and drained fields (species: 2–8; abundance: 3–66). However, species composition did differ between flooded and dry fields, and a natural wetland. Mean species richness and abundance was lower in flooded and drained fields than the natural wetland (species: 5–8; abundance: 54–139). Abundance at all sites was higher in the growing seasons. Amphibians were monitored in six randomly selected rice fields (1 ha), three that were kept flooded after harvest and three that were drained dry. Three surveys were undertaken in a natural wetland (10 km2). Each field was surveyed six times at night using six random 15 minute visual transects in June 2005 to June 2006.
(Summarised by: Rebecca K Smith)
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