Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Generalizing Levins metap… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Generalizing Levins metapopulation model in explicit space: Models of intermediate complexity

Artikel i vetenskaplig tidskrift
Författare M. Roy
Karin C. Harding
R. D. Holt
Publicerad i Journal of Theoretical Biology
Volym 255
Nummer/häfte 1
Sidor 152-161
ISSN 0022-5193
Publiceringsår 2008
Publicerad vid Linnécentrum för marin evolutionsbiologi (CEMEB)
Institutionen för marin ekologi
Sidor 152-161
Språk en
Ämnesord allee effect, rescue effect, anti-rescue effect, spatial clustering, power law, range limit, theoretical-models, self-organization, species borders, dynamics, extinction, persistence, conservation, disturbance, signatures, patterns
Ämneskategorier Biologiska vetenskaper

Sammanfattning

A recent study [Harding and McNamara, 2002. A unifying framework for metapopulation dynamics. Am. Nat. 160, 173-185] presented a unifying framework for the classic Levins metapopulation model by incorporating several realistic biological processes, such as the Allee effect, the Rescue effect and the Anti-rescue effect, via appropriate modifications of the two basic functions of colonization and extinction rates. Here we embed these model extensions on a spatially explicit framework. We consider population dynamics on a regular grid, each site of which represents a patch that is either Occupied or empty, and with spatial coupling by neighborhood dispersal. While broad qualitative similarities exist between the spatially explicit models and their spatially implicit (mean-field) counterparts, there are also important differences that result from the details of local Processes. Because of localized dispersal, spatial correlation develops among the dynamics of neighboring populations that decays with distance between patches. The extent of this correlation at equilibrium differs among the metapopulation types, depending on which processes prevail in the colonization and extinction dynamics. These differences among dynamical processes become manifest in the spatial pattern and distribution of "clusters" of occupied patches. Moreover, metapopulation dynamics along a smooth gradient of habitat availability show significant differences in the spatial pattern at the range limit. The relevance of these results to the dynamics of disease spread in metapopulations is discussed. (C) 2008 Elsevier Ltd. All rights reserved.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?