Adaptive responses and disruptive effects: how major wildfire influences kinship‐based social interactions in a forest marsupial

Banks, Sam C.; Blyton, Michaela D. J.; Blair, David; McBurney, Lachlan; Lindenmayer, David B.

doi:10.1111/j.1365-294x.2011.05282.x

Cited by 19 publications

(21 citation statements)

References 48 publications

(133 reference statements)

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“…Even within the same study region (and species), different studies have revealed contradictory patterns in different populations. Mountain brushtail possums at Cambarville (within the broader region studied here) shared dens less often and used fewer trees where hollow trees were scarce [15], [23], [46]. These results contradict the present findings and are consistent with predictions from theoretical and empirical work suggesting that resource defence behaviour and intolerance of other individuals develops under resource competition [30].…”

Section: Discussionsupporting

confidence: 68%

Can Individual and Social Patterns of Resource Use Buffer Animal Populations against Resource Decline?

et al. 2013

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Species in many ecosystems are facing declines of key resources. If we are to understand and predict the effects of resource loss on natural populations, we need to understand whether and how the way animals use resources changes under resource decline. We investigated how the abundance of arboreal marsupials varies in response to a critical resource, hollow-bearing trees. Principally, we asked what mechanisms mediate the relationship between resources and abundance? Do animals use a greater or smaller proportion of the remaining resource, and is there a change in cooperative resource use (den sharing), as the availability of hollow trees declines? Analyses of data from 160 sites surveyed from 1997 to 2007 showed that hollow tree availability was positively associated with abundance of the mountain brushtail possum, the agile antechinus and the greater glider. The abundance of Leadbeater’s possum was primarily influenced by forest age. Notably, the relationship between abundance and hollow tree availability was significantly less than 1∶1 for all species. This was due primarily to a significant increase by all species in the proportional use of hollow-bearing trees where the abundance of this resource was low. The resource-sharing response was weaker and inconsistent among species. Two species, the mountain brushtail possum and the agile antechinus, showed significant but contrasting relationships between the number of animals per occupied tree and hollow tree abundance. The discrepancies between the species can be explained partly by differences in several aspects of the species’ biology, including body size, types of hollows used and social behaviour as it relates to hollow use. Our results show that individual and social aspects of resource use are not always static in response to resource availability and support the need to account for dynamic resource use patterns in predictive models of animal distribution and abundance.

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Section: Discussionsupporting

confidence: 68%

Can Individual and Social Patterns of Resource Use Buffer Animal Populations against Resource Decline?

et al. 2013

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“…) or fire (Banks et al . ). Differences in spatial genetic structure between two locations may simply be capturing points in which temporal variation differs; variation in dispersal patterns is not necessarily synchronous between sites.…”

Section: Discussionmentioning

confidence: 97%

Similarity in temporal variation in sex‐biased dispersal over short and long distances in the dark‐eyed junco,Junco hyemalis

2013

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Patterns of sex-biased dispersal (SBD) are typically consistent within taxa, for example female-biased in birds and male-biased in mammals, leading to theories about the evolutionary pressures that lead to SBD. However, generalizations about the evolution of sex biases tend to overlook that dispersal is mediated by ecological factors that vary over time. We examined potential temporal variation in between- and within-population dispersal over an 11-year period in a bird, the dark-eyed junco (Junco hyemalis). We measured between-population dispersal patterns using genetic assignment indices and found yearly variation in which sex was more likely to have immigrated. When we measured within-population spatial genetic structure and mark–recapture dispersal distances, we typically found yearly SBD patterns that mirrored between-population dispersal, indicating common eco-evolutionary causes despite expected differences due to the scale of dispersal. However, in years without detectable between-population sex biases, we found genetic similarity between nearby males within our population. This suggests that, in certain circumstances, ecological pressures may act on within-population dispersal without affecting dispersal between populations. Alternatively, current analytical tools may be better able to detect within-population SBD. Future work will investigate potential causes of the observed temporal variation in dispersal patterns and whether they have greater effects on within-population dispersal.

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“…dispersal) must be fine‐tuned to local constraints and immediate opportunities (Arnaud et al. 2012; Banks et al. 2012; Blyton et al.…”

Section: Kin Competitionmentioning

confidence: 99%

Social systems: demographic and genetic issues

Perrin¹,

Petit²,

Ménard³

2012

Molecular Ecology

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International audienceAnimal societies certainly count among the most complex structures that emerged on earth, the latest of the 'major transitions' in evolution. Their study necessarily involves a wide panel of disciplines and a large diversity of approaches. The field is expanding at a rapid pace, which, however, is not going without some turbulence, as testified by recent fierce controversies regarding the concept of inclusive fitness. These battles elicited appeals for 'more cooperation among altruism researchers' (Okasha 2010). In this spirit, we recently organized at the University of Rennes (10-15 October 2010) a workshop on mammalian social systems. The idea was to bring together 'social scientists' working on a diversity of animal models (from bats to elephants and from hyenas to whales) and using a diversity of approaches (from demography to population genetics and from game-theoretical models to behavioural experiments), with the aim of evaluating how key processes (e.g. inclusive fitness and kin selection, versus cooperation and reciprocity, or the interplay between inbreeding, kin competition and kin recognition) might differently affect the emergence and evolution of social systems in a diversity of mammalian lineages, depending on ecological settings or other constraints. This diversity of complementary approaches explains why the several contributions to the workshop collected in the present Special Issue are not all 'pure' molecular ecology

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Adaptive responses and disruptive effects: how major wildfire influences kinship‐based social interactions in a forest marsupial

Cited by 19 publications

References 48 publications

Can Individual and Social Patterns of Resource Use Buffer Animal Populations against Resource Decline?

Can Individual and Social Patterns of Resource Use Buffer Animal Populations against Resource Decline?

Similarity in temporal variation in sex‐biased dispersal over short and long distances in the dark‐eyed junco,Junco hyemalis

Social systems: demographic and genetic issues

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