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Microreserves are an important tool for amphibian conservation.

Emma Steigerwald1,2, Julia Chen3,4, Julianne Oshiro3,4

  • 1Museum of Vertebrate Zoology, University of California, Berkeley, Berkeley, CA, 94720, USA. emma.c.steigerwald@gmail.com.

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Microreserves, small protected areas (<10 km²), are crucial for amphibian conservation. These areas efficiently protect threatened species with small ranges, complementing larger protected area networks.

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Area of Science:

  • Conservation Biology
  • Ecology
  • Biodiversity Studies

Background:

  • Global protected area (PA) networks aim to conserve biodiversity but often under-represent vulnerable species.
  • Amphibians, the most vulnerable vertebrate class, face significant under-representation in current PA networks.
  • The establishment of new PAs for amphibian conservation has slowed since 2010.

Purpose of the Study:

  • To evaluate the conservation value of microreserves (<10 km²) for amphibians.
  • To demonstrate how microreserves can address shortcomings in the global PA network for amphibian protection.
  • To highlight the potential of microreserves in conserving small-range endemic species.

Main Methods:

  • Analysis of amphibian range sizes compared to other terrestrial vertebrates.
  • Assessment of amphibian species richness in microreserves versus larger PAs.
  • Evaluation of the efficiency of microreserves in increasing PA network coverage of amphibian species.

Main Results:

  • Amphibians generally possess smaller geographic ranges than other terrestrial vertebrates.
  • Existing microreserves exhibit amphibian species richness comparable to PAs 1000-10,000 times larger.
  • Microreserves enhance PA network coverage of amphibian species 1.5-6 times faster than larger PAs due to high amphibian beta diversity.

Conclusions:

  • Microreserves are a highly effective conservation tool for protecting amphibians, especially threatened species with limited ranges.
  • Integrating microreserves into conservation strategies can significantly improve the efficiency and coverage of global PA networks.
  • Addressing global biodiversity loss necessitates the strategic use of microreserves to safeguard small-range endemics.