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No Allee effect detected during the natural recolonization by a large carnivore despite low growth rate

Andren, Henrik and Hemmingmoore, Heather and Aronsson, Malin and Åkesson, Mikael and Persson, Jens (2022). No Allee effect detected during the natural recolonization by a large carnivore despite low growth rate. Ecosphere. 13 :3 , e3997
[Research article]

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Abstract

Eurasian lynx (Lynx lynx) have recently naturally recolonized southern Sweden. The first documented reproduction of lynx in recent times occurred in 2003, and the population increased from 2 to 48 family groups (the unit of measurement in Swedish monitoring) during its first 18 years (2003/2004-2020/2021). We did not detect any Allee effect, that is, lower growth rate at low population density, during the recolonization of southern Sweden, although our population simulations revealed a non-negligible (30%) chance that population observed development could include an Allee effect. The probable absence of an Allee effect was likely because colonizing females did not lack mating partners, as a larger number of wide-ranging males were established in the area before documented reproduction took place. Despite the absence of an Allee effect, the growth rate during recolonization was lower in southern Sweden (lambda = 1.20) than in central Sweden (lambda = 1.29). We have no evidence of higher mortality, including that from poaching, or lower reproduction in southern Sweden could explain the lower growth rate. Instead, we suggest that the lower growth rate during the recolonization of southern Sweden was explained by fewer immigrants arriving from central Sweden due to areas of less suitable habitat between central and southern Sweden, partially preventing immigration southward. From a conservation point of view, it is positive that this small population could recover without being negatively influenced by an Allee effect, as small populations with an Allee effect experience lower viability than those without.

Authors/Creators:Andren, Henrik and Hemmingmoore, Heather and Aronsson, Malin and Åkesson, Mikael and Persson, Jens
Title:No Allee effect detected during the natural recolonization by a large carnivore despite low growth rate
Series Name/Journal:Ecosphere
Year of publishing :2022
Volume:13
Number:3
Article number:e3997
Number of Pages:12
Publisher:WILEY
ISSN:2150-8925
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:Allee effect, barrier, colonization, growth rate, habitat suitability, inverse density dependence, lynx
URN:NBN:urn:nbn:se:slu:epsilon-p-116745
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116745
Additional ID:
Type of IDID
DOI10.1002/ecs2.3997
Web of Science (WoS)000776291100001
ID Code:27602
Faculty:S - Faculty of Forest Sciences
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:25 Apr 2022 07:25
Metadata Last Modified:25 Apr 2022 07:31

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