NDLI: Ecological divergence among colour morphs mediated by changes in spatial network structure associated with disturbance.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Lattanzio, Matthew S. Miles, Donald B.
Spatial Coverage	Arizona
Description	Country affiliation: United States Author Affiliation: Lattanzio MS ( Department of Biological Sciences, Ohio University, 107 Irvine Hall, Athens, OH, 45701, USA.); Miles DB ( Department of Biological Sciences, Ohio University, 107 Irvine Hall, Athens, OH, 45701, USA.)
Abstract	Differences in individual behaviour affect social interactions and contribute to the spatial structuring of animal populations. However, disturbance should also affect spatial networks by altering habitat heterogeneity and resource availability. Variation in resource availability should perturb the frequency and nature of social and ecological interactions within a population by affecting the spatial distribution of individuals. In disturbed habitats where resources are limiting, spatial relationships should reflect behavioural differences among individuals, with higher-quality resources controlled by dominant individuals. In contrast, all individuals may exploit preferred resources in resource-rich habitats. Environmental variation and population reorganization may also result in variation in morphological, behavioural and ecological traits, which ultimately affect fitness. We addressed these considerations for male tree lizards (Urosaurus ornatus) at three sites that differ in levels of disturbance. The habitats at these localities differed in the availability of live trees, the preferred microhabitat of U. ornatus. In addition, male U. ornatus exhibits a polymorphism in dewlap colour linked with differences in aggression, which should influence their position in a network and access to resources. We applied a network framework to characterize the spatial organization of male morphs at each site and quantified male aggressive behaviour in the laboratory. We also compared body size, body condition, number of bite marks, parasite load and the microhabitat use and diet, of males among the sites. We detected no significant differences in spatial network structure between unburned and infrequently burned sites. However, at a frequently burned site, the network shifted towards geographically closer, heteromorphic male neighbour associations. Males at this site were also larger, more aggressive and had more bite marks but fewer parasites than males at the other sites. Moreover, we detected divergence in microhabitat use and diet among the morphs at the frequently burned site that reflected the shift in spatial network structure and differences in morph behaviour. That is, only more aggressive morphs usurped trees and consumed prey from higher trophic levels. We conclude that environmental variation may influence animal spatial network structure. Jointly, behavioural and environmental variation may promote despotic social dynamics and ecological divergence in resource-limited habitats.
File Format	HTM / HTML
ISSN	00218790
e-ISSN	13652656
Journal	Journal of Animal Ecology
Issue Number	6
Volume Number	83
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2014-11-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Discipline Zoology Aggression Ecosystem Lizards Physiology Pigmentation Social Behavior Animals Arizona Fires Genetics Polymorphism, Genetic Population Dynamics Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s.
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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Data from: Ecological divergence among colour morphs mediated by changes in spatial network structure associated with disturbance (Dataset)

Community-level demographic consequences of urbanization: an ecological network approach.

Life-history trade-offs mediate 'personality' variation in two colour morphs of the pea aphid, Acyrthosiphon pisum.

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Ecological divergence among colour morphs mediated by changes in spatial network structure associated with disturbance.