4.8 Article

Who likes it hot? A global analysis of the climatic, ecological, and evolutionary determinants of warming tolerance in ants

Journal

GLOBAL CHANGE BIOLOGY
Volume 18, Issue 2, Pages 448-456

Publisher

WILEY
DOI: 10.1111/j.1365-2486.2011.02542.x

Keywords

biodiversity; Formicidae; global warming; insect; physiology; temperature

Funding

  1. DOE-PER [DE-FG02-08ER64510]
  2. NASA [NNX09AK22G]
  3. NSF [09533390]
  4. SE Climate Science Center (USGS)
  5. Division Of Environmental Biology
  6. Direct For Biological Sciences [0953390] Funding Source: National Science Foundation
  7. NASA [114537, NNX09AK22G] Funding Source: Federal RePORTER

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Effects of climate warming on wild populations of organisms are expected to be greatest at higher latitudes, paralleling greater anticipated increases in temperature in these regions. Yet, these expectations assume that populations in different regions are equally susceptible to the effects of warming. This is unlikely to be the case. Here, we develop a series of predictive models for physiological thermal tolerances in ants based on current and future climates. We found that tropical ants have lower warming tolerances, a metric of susceptibility to climate warming, than temperate ants despite greater increases in temperature at higher latitudes. Using climatic, ecological and phylogenetic data, we refine our predictions of which ants (across all regions) were most susceptible to climate warming. We found that ants occupying warmer and more mesic forested habitats at lower elevations are the most physiologically susceptible to deleterious effects of climate warming. Phylogenetic history was also a strong indicator of physiological susceptibility. In short, we find that ants that live in the canopies of hot, tropical forest are the most at risk, globally, from climate warming. Unfortunately this is where many, perhaps most, ant and other species on Earth live.

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