Salamander Ecology and Climate Adaptation

Salamanders occupy a unique position in terrestrial and freshwater ecosystems, serving as both predators of invertebrates and prey for higher trophic levels while mediating nutrient cycling and energy flow. As lungless ectotherms, many species depend critically on moist microhabitats to maintain skin respiration, restrict water loss and regulate body temperature. Geographic variation in topography, canopy cover and soil moisture creates fine-scale environmental gradients that influence local abundance, behaviour and population dynamics. Salamanders exhibit a range of reproductive strategies, from direct development to aquatic larval stages, each with distinct sensitivity to temperature and precipitation regimes. Climate change threatens these species through habitat warming, altered precipitation patterns and reduced refugia availability, leading to shifts in distribution, body size and phenology. Understanding how salamanders respond physiologically and ecologically to climatic stressors is essential for conserving global amphibian diversity and preserving the ecosystem services they support.

Research from Nature Portfolio

Long-term surveys of headwater stream communities have revealed divergent responses among co-occurring species to climate and habitat change. While median body length of trout declined by up to 13 per cent over three decades, a large stream salamander maintained its size, suggesting differential resilience linked to density-dependent and density-independent factors. Modelling of temperature, flow and habitat complexity demonstrated that stream temperature alone did not account for observed trends, but that interactions among biotic abundance, microhabitat and hydroclimate drive size dynamics. Continued monitoring is needed to predict potential trophic cascades and biodiversity loss.

Experimental work on montane salamanders has uncovered a crucial role for thermal cues in the development of resistance to desiccation. Individuals exposed to elevated temperatures exhibited enhanced water-loss tolerance, underpinned by upregulation of genes involved in vascular development and tissue regeneration. These findings indicate that plastic modulation of skin capillarity may act as a physiological buffer against drying conditions, highlighting an adaptive mechanism that could extend to other terrestrial ectotherms facing increasingly arid microclimates.

Salamander Ecology and Climate Adaptation publication trend

The graph below shows the total number of articles in salamander ecology and climate adaptation across all publications each year (not limited to Nature Index journals).

Technical terms

Ectotherm: An organism that relies on external heat sources to regulate body temperature.

Desiccation resistance: Physiological capacity to minimise water loss and withstand dry conditions.

Phenotypic plasticity: The ability of an organism to alter its morphology, physiology or behaviour in response to environmental variation.

Microclimate refugia: Localised areas where conditions remain relatively stable, offering shelter from broader climatic extremes.

Niche modelling: Computational methods to predict species’ suitable habitats based on environmental variables.

References

1. Fine-Scale Habitat Associations of a Terrestrial Salamander: The Role of Environmental Gradients and Implications for Population Dynamics. PLOS ONE (2013).
2. The trophic role of a forest salamander: impacts on invertebrates, leaf litter retention, and the humification process. Ecosphere (2014).
3. Shrinking sizes of trout and salamanders are unexplained by climate warming alone. Scientific Reports (2024).
4. Thermal cues drive plasticity of desiccation resistance in montane salamanders with implications for climate change. Nature Communications (2019).
5. Evaluating within‐population variability in behavior and demography for the adaptive potential of a dispersal‐limited species to climate change. Ecology and Evolution (2016).
6. Projected Loss of a Salamander Diversity Hotspot as a Consequence of Projected Global Climate Change. PLOS ONE (2010).
7. Predicted Changes in Climatic Niche and Climate Refugia of Conservation Priority Salamander Species in the Northeastern United States. Forests (2014).