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Gallou, Arnaud ; Jump, Alistair S. ; Lynn, Joshua S. ; Field, Richard ; Irl, Severin D. H. ; Steinbauer, Manuel ; Beierkuhnlein, Carl ; Chen, Jan-Chang ; Chou, Chang-Hung ; Hemp, Andreas ; Kidane, Yohannes ; König, Christian ; Kreft, Holger ; Naqinezhad, Alireza ; Nowak, Arkadiusz ; Nuppenau, Jan-Niklas ; Trigas, Panayiotis ; Price, Jonathan P. ; Roland, Carl A. ; Schweiger, Andreas H. ; Weigelt, Patrick ; Flantua, Suzette G. A. ; Grytnes, John-Arvid:
Diurnal temperature range as a key predictor of plants’ elevation ranges globally.
In: Nature Communications.
Bd. 14
(2023)
Heft 1
.
- 7890.
ISSN 2041-1723
DOI: https://doi.org/10.1038/s41467-023-43477-8
Abstract
A prominent hypothesis in ecology is that larger species ranges are found in
more variable climates because species develop broader environmental tolerances,
predicting a positive range size-temperature variability relationship.
However, this overlooks the extreme temperatures that variable climates
impose on species, with upper or lower thermal limits more likely to be
exceeded. Accordingly, we propose the ‘temperature range squeeze’ hypothesis,
predicting a negative range size-temperature variability relationship. We
test these contrasting predictions by relating 88,000 elevation range sizes of
vascular plants in 44 mountains to short- and long-termtemperature variation.
Consistent with our hypothesis, we find that species’ range size is negatively
correlated with diurnal temperature range. Accurate predictions of short-term
temperature variation will become increasingly important for extinction risk
assessment in the future.