the conservation value of regenerating tropical forest for amphibians
DESCRIPTION
The crees foundation conducts conservation research in the Manu Biosphere Reserve, Peru, to understand the biodiversity and conservation value of regenerating tropical forest.TRANSCRIPT
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The conservation value of regenerating tropical forest for
amphibians
Olivia Hill
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The Problem
• primary forest makes up around 36% of global forest cover whilst secondary/regenerating areas constitute 57%
• there is little consensus within the scientific community about the conservation value of regenerating forests
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Location
• Manu Learning Centre, Madre de Dios, Peru
• 643ha
• 460-700masl
• Regenerating for 30-40 years
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Methodologies
Nocturnal visual encounter surveys:
• 100m transects off the main trails
• 25 minutes
• 20 transects in each forest type (+8 in Bamboo forest)
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Pitfall traps
• Two routes with 4 sites in each forest type
• 4 20L buckets and 24m plastic drift fence
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Artificial Habitats
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Results
• 62 confirmed amphibian species at the MLC
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Osteocephalus mimeticus
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Cochranella cf. nola
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Scinax funereus
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Pristimantis pharangobates
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Ameerega sp1
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Pristimantis sp1
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Pristimantis sp2
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Pristimantis sp3
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Pristimantis sp4
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Hyloscirtus cf. phyllognathus
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Amphibian communities along an altitudinal gradient
• Decrease of amphibian diversity with the increase of the altitude.
• Big shifts in species composition in a small distance
• high number of species with a restricted range
• Conservation efforts need to focus in areas like the Piñi Piñi range
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Comparison with local primary sites
Taxa
Primary forest sites used to determine
average richness Observed richness at the
MLC
Cocha Cashu Los Amigos Pakitza
Amphibians 78 (80%) 63 (98%) 82 (76%) 62
Data from: Whitworth et al (2014 – under review), A second chance to conserve? The potential biodiversity and conservation value of regenerating forest
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A Key Indicator Group - Craugistoridae
Taxa
Observed richness at MLC
(% of those predicted) Predicted richness at MLC
Average
richness from
primary
forest sites
Observed
richness of
MLC as a %
of richness
at primary
forest sites
Total Indicators Conservation
concern Total Indicators
Conservation
concern
Amphibians 62 (84%) 16 (80%) - 74 20 - 74 84%
Data from: Whitworth et al (2014 – under review), A second chance to conserve? The potential biodiversity and conservation value of regenerating forest
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Discussion
1. Regenerating forest can hold very high levels of amphibian diversity indicating that is of high conservation value.
2. These levels are not necessarily dominated by habitat generalists
but also key indicator species.
3. Many unidentified species still exist, even within human modified landscapes
4. More research on the conservation value of regenerating tropical forest is required.
5. So lets protect more areas of secondary rainforest and allow them to regenerate.
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Bibliography
• Beirne et al (2013), Herpetofaunal responses to anthropogenic habitat change within a small forest reserve in eastern Ecuador, The Herpetological Journal, 23(4)
• Whitworth et al. (2014 – under review), A Second Chance to Conserve? Assessing the potential biodiversity and conservation value of regenerating forest
• Global Forest Resource Assessment (2010)
• Chazdon.R (2008), ‘Beyond Deforestation: restoring forests and ecosystem services on degraded lands’, science, 320(5882)
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Thank you
• Special thanks to Andy Whitworth, Jaime Villacampa and Jenni Serrano-Rojas