NDLI: Dispersal, niche breadth and population extinction: colonization ratios predict range size in North American dragonflies.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	McCauley, Shannon J. Davis, Christopher J. Werner, Earl E. Robeson, Michael S.
Spatial Coverage	North America
Description	Country affiliation: Canada Author Affiliation: McCauley SJ ( Department of Biology, University of Toronto Mississauga, 3359 Mississauga Road North, Mississauga, ON L5L 1C6, Canada.); Davis CJ ( Department of Ecology & Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON M5S 3B2, Canada.); Werner EE ( Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA.); Robeson MS ( Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109-1048, USA.)
Abstract	Species' range sizes are shaped by fundamental differences in species' ecological and evolutionary characteristics, and understanding the mechanisms determining range size can shed light on the factors responsible for generating and structuring biological diversity. Moreover, because geographic range size is associated with a species' risk of extinction and their ability to respond to global changes in climate and land use, understanding these mechanisms has important conservation implications. Despite the hypotheses that dispersal behaviour is a strong determinant of species range areas, few data are available to directly compare the relationship between dispersal behaviour and range size. Here, we overcome this limitation by combining data from a multispecies dispersal experiment with additional species-level trait data that are commonly hypothesized to affect range size (e.g. niche breadth, local abundance and body size.). This enables us to examine the relationship between these species-level traits and range size across North America for fifteen dragonfly species. Ten models based on a priori predictions about the relationship between species traits and range size were evaluated and two models were identified as good predictors of species range size. These models indicated that only two species' level traits, dispersal behaviour and niche breadth were strongly related to range size. The evidence from these two models indicated that dragonfly species that disperse more often and further had larger North American ranges. Extinction and colonization dynamics are expected to be a key linkage between dispersal behaviour and range size in dragonflies. To evaluate how extinction and colonization dynamics among dragonflies were related to range size we used an independent data set of extinction and colonization rates for eleven dragonfly species and assessed the relationship between these populations rates and North American range areas for these species. We found a negative relationship between North American range size and species' extinction-to-colonization ratios. Our results indicate that metapopulation dynamics act to shape the extent of species' continental distributions. These population dynamics are likely to interact with dispersal behaviour, particularly at species range margins, to determine range limits and ultimately species range sizes.
File Format	HTM / HTML
ISSN	00218790
e-ISSN	13652656
Journal	Journal of Animal Ecology
Issue Number	4
Volume Number	83
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2014-07-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Discipline Zoology Animal Distribution Ecosystem Extinction, Biological Odonata Physiology Biological Evolution Climate Change Geography North America Population Dynamics Species Specificity 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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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Data from: Dispersal, niche breadth, and population extinction/colonization ratios predict range size in North American dragonflies (Dataset)

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Data from: Dispersal, niche breadth, and population extinction/colonization ratios predict range size in North American dragonflies (Dataset)

Incorporating population-level variation in thermal performance into predictions of geographic range shifts.

Variable impact of late-Quaternary megafaunal extinction in causing ecological state shifts in North and South America.

Realized climatic niche of North American plant taxa lagged behind climate during the end of the Pleistocene.

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Late Cretaceous restructuring of terrestrial communities facilitated the end-Cretaceous mass extinction in North America.

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Dispersal, niche breadth and population extinction: colonization ratios predict range size in North American dragonflies.