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Drought, deluge and declines: the impact of precipitation extremes on amphibians in a changing climate

Biology

By:
, , and
DOI: 10.3390/biology2010399

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Abstract

The Class Amphibia is one of the most severely impacted taxa in an on-going global biodiversity crisis. Because amphibian reproduction is tightly associated with the presence of water, climatic changes that affect water availability pose a particularly menacing threat to both aquatic and terrestrial-breeding amphibians. We explore the impacts that one facet of climate change—that of extreme variation in precipitation—may have on amphibians. This variation is manifested principally as increases in the incidence and severity of both drought and major storm events. We stress the need to consider not only total precipitation amounts but also the pattern and timing of rainfall events. Such rainfall “pulses” are likely to become increasingly more influential on amphibians, especially in relation to seasonal reproduction. Changes in reproductive phenology can strongly influence the outcome of competitive and predatory interactions, thus potentially altering community dynamics in assemblages of co-existing species. We present a conceptual model to illustrate possible landscape and metapopulation consequences of alternative climate change scenarios for pond-breeding amphibians, using the Mole Salamander, Ambystoma talpoideum, as an example. Although amphibians have evolved a variety of life history strategies that enable them to cope with environmental uncertainty, it is unclear whether adaptations can keep pace with the escalating rate of climate change. Climate change, especially in combination with other stressors, is a daunting challenge for the persistence of amphibians and, thus, the conservation of global biodiversity.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Drought, deluge and declines: the impact of precipitation extremes on amphibians in a changing climate
Series title:
Biology
DOI:
10.3390/biology2010399
Volume
2
Issue:
1
Year Published:
2013
Language:
English
Publisher:
MDPI AG
Publisher location:
Basel, Switzerland
Contributing office(s):
Southeast Ecological Science Center
Description:
20 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Biology
First page:
399
Last page:
418
Number of Pages:
20