Affiliation:
1. Institute of Biology, Leiden University, 2333 BE Leiden, The Netherlands
2. Naturalis Biodiversity Center, 2333 CR Leiden, The Netherlands, pim.arntzen@gmail.com
Abstract
Abstract
Theory suggests that spatial segregation of similar, co-occurring species may be driven by alternative innate life history and dispersal strategies, and that it operates through catastrophic events. An inventory of the evolutionary closely related small-bodied newts Lissotriton helveticus and L. vulgaris in the northwest of France demonstrated the species’ spatial partitioning, with L. vulgaris dominating in two pond-rich and historically disturbed coastal areas and L. helveticus prevailing inland where ponds are sparser. Population numbers were followed over several decades (1975–2021) in a pond within the narrow (ca. 2000 m wide) species transition zone. Early in the temporal survey (1986) a massive die-off was observed of two-third of the L. helveticus breeding population from a late frost event. Yet, the contribution of L. helveticus to the newt assemblage was more or less stable around 60%, even though the total population size fluctuated by an order of magnitude. Lissotriton vulgaris and a third species, Ichthyosaura alpestris, made up ca. 30% and 10% of the total till 1993, after which date their relative contributions reversed. These data suggest that a state shift may have occurred among the latter two species and that the assumed two-species dynamics of Lissotriton underlying the study has been an oversimplification. The local decline of L. vulgaris is paralleled by the loss of well-vegetated ponds from the wider agricultural terrain that affects this species more than L. helveticus and I. alpestris.
Subject
Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics
Reference68 articles.
1. Testing for equal catchability of Triturus newts by dip netting;Arntzen, J.W.,2002
2. Amphibian decline, pond loss and reduced population connectivity under agricultural intensification over a 38-year period;Arntzen, J.W.,2017
3. Rare hybridization and introgression in smooth and palmate newts (Salamandridae: Triturus vulgaris and T. helveticus);Arntzen, J.W.,1998
4. Cost comparison of marking techniques in long-term population studies: pit-tags versus pattern maps;Arntzen, J.W.,2004
5. Sampling efficiency, bias and shyness in funnel trapping aquatic newts;Arntzen, J.W.,2020
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