Climate change and invasive species: a physiological performance comparison of invasive and endemic bees in Fiji.

Autor: da Silva CRB; School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia carmen.dasilva@monash.edu.; College of Science and Engineering, Flinders University, Bedford Park, SA 5000, Australia., Beaman JE; School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia.; College of Science and Engineering, Flinders University, Bedford Park, SA 5000, Australia., Dorey JB; College of Science and Engineering, Flinders University, Bedford Park, SA 5000, Australia.; Biological and Earth Sciences, South Australian Museum, Adelaide, SA 5000, Australia., Barker SJ; College of Science and Engineering, Flinders University, Bedford Park, SA 5000, Australia., Congedi NC; College of Science and Engineering, Flinders University, Bedford Park, SA 5000, Australia., Elmer MC; College of Science and Engineering, Flinders University, Bedford Park, SA 5000, Australia., Galvin S; School of Geography, Earth Science and Environment, The University of the South Pacific, Laucala Campus, Suva, Fiji., Tuiwawa M; South Pacific Regional Herbarium and Biodiversity Centre, The University of the South Pacific, Laucala Campus, Suva, Fiji., Stevens MI; Biological and Earth Sciences, South Australian Museum, Adelaide, SA 5000, Australia.; Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia., Alton LA; School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia., Schwarz MP; College of Science and Engineering, Flinders University, Bedford Park, SA 5000, Australia., Kellermann V; School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia.
Jazyk: angličtina
Zdroj: The Journal of experimental biology [J Exp Biol] 2021 Jan 12; Vol. 224 (Pt 1). Date of Electronic Publication: 2021 Jan 12.
DOI: 10.1242/jeb.230326
Abstrakt: Anthropogenic climate change and invasive species are two of the greatest threats to biodiversity, affecting the survival, fitness and distribution of many species around the globe. Invasive species are often expected to have broad thermal tolerance, be highly plastic, or have high adaptive potential when faced with novel environments. Tropical island ectotherms are expected to be vulnerable to climate change as they often have narrow thermal tolerance and limited plasticity. In Fiji, only one species of endemic bee, Homalictus fijiensis , is commonly found in the lowland regions, but two invasive bee species, Braunsapis puangensis and Ceratina dentipes , have recently been introduced into Fiji. These introduced species pollinate invasive plants and might compete with H. fijiensis and other native pollinators for resources. To test whether certain performance traits promote invasiveness of some species, and to determine which species are the most vulnerable to climate change, we compared the thermal tolerance, desiccation resistance, metabolic rate and seasonal performance adjustments of endemic and invasive bees in Fiji. The two invasive species tended to be more resistant to thermal and desiccation stress than H. fijiensis , while H. fijiensis had greater capacity to adjust their CT max with season, and H. fijiensis females tended to have higher metabolic rates than B. puangensis females. These findings provide mixed support for current hypotheses for the functional basis of the success of invasive species; however, we expect the invasive bees in Fiji to be more resilient to climate change because of their increased thermal tolerance and desiccation resistance.
Competing Interests: Competing interestsThe authors declare no competing or financial interests.
(© 2021. Published by The Company of Biologists Ltd.)
Databáze: MEDLINE
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