Modelling the Effects of Dispersal and Landscape Configuration on Population Distribution and Viability in Fragmented Habitat

Alderman, J.; McCollin, Duncan; Hinsley, Shelley A.; Bellamy, Paul E.; Picton, Philip; Crockett, Robin G M

doi:10.1007/s10980-005-4135-5

Cited by 36 publications

(25 citation statements)

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“…The results of this study and others (Shukuroglou & McCarthy 2006, Knight & Beale 2005, Manton et al 2005, Alderman et al 2005 have indicated that other environmental or biological factors may be more important in determining the distribution of birds.…”

Section: Discussionsupporting

confidence: 53%

“…Modelling habitat suitability has become an important technique in the planning of avian conservation strategies (Bradbury et al 2005, Oja et al 2005, LopezLopez et al 2006, Olivier & Wotherspoon 2006, Manton et al 2005, Alderman et al 2005, Osborne et al 2001, Hashimoto et al 2005, Guisan & Zimmermann 2000, Knight & Beale 2005. Habitat suitability models require the simultaneous consideration of information on key environmental variables in situations where the species is present or absent.…”

mentioning

confidence: 99%

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A model of habitat suitability for Krueper's NuthatchSitta krueperi

2011

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Section: Discussionsupporting

confidence: 53%

mentioning

confidence: 99%

A model of habitat suitability for Krueper's NuthatchSitta krueperi

2011

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“…Dispersal of all young in a fledged brood was assumed to occur on the same day, as recorded by Morley (1953), although there is evidence that this is not always the case (Nilsson and Smith 1985). Marsh tit juvenile dispersal was modelled by applying behavioural rules based on these life-cycle characteristics with reference to the structure of the wood, including territory shape and location, an approach in which both habitat structure and species' characteristics govern population sizes and distribution (Alderman et al 2005). …”

Section: Species Modellingmentioning

confidence: 99%

“…We use an individual-based Spatially Explicit Population Model (SEPM) (Alderman et al 2005, Alderman and and use the marsh tit Poecile palustris as an example to show that the potential for successful establishment after initial natal dispersal may be affected by natal territory location within a woodland patch and that this influence may be positive or negative depending on the availability of surrounding woodland. The marsh tit is largely confined to mature deciduous woodland, seldom breeds in habitat patches of less than 4-5 ha and is relatively sedentary (Cramp and Perrins 1993, Broughton et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…During a simulation run, the locations of individuals are superimposed on the landscape, presenting a real-time visual output to the user. PatchMapper is further described in Alderman et al (2005), with typical applications given in Alderman et al (2005) and Alderman and Hinsley (2007). The description of the model configuration used for the investigations detailed in this paper which follows is based on the Overview, Design concepts and Details (ODD) protocol as proposed by Grimm et al (2006), for describing individual based models.…”

Section: Introductionmentioning

confidence: 99%

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Local Settlement in Woodland Birds in Fragmented Habitat: Effects of Natal Territory Location and Timing of Fledging

et al. 2011

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Factors such as early fledging and natal territory location have been shown to influence dispersal and settlement success of woodland birds. Early fledging allows for earlier dispersal, increasing the chances of an individual locating good quality habitat. However, for birds in fragmented woodland, the advantages of early dispersal may be modified by natal territory location in relation to the availability of suitable habitat in the surrounding landscape. Connecting habitat corridors may promote dispersal, and connectivity in landscapes is usually considered as positive, but this may not always be the case. In landscapes where habitat is highly fragmented, corridors may promote departure, but leave dispersers with little chance of success.An individual-based Spatially Explicit Population Model was used to investigate the effects of timing of fledging, natal territory location and proximity to potential dispersal corridors on local settlement rates. Modelling was based on both hypothetical and real woodlands and used marsh tit as an example woodland bird. For each modelled scenario, the number of young that settled was recorded for each territory, the overall results being expressed as the mean percentage settlement rate per territory.Territory location and edge effects were both found to influence dispersal and settlement rate. Fledging early clearly demonstrated a general advantage for local settlement success. However, territory location, in relation to the likelihood of dispersing out of the wood was found to interact with fledging order. Fledglings from internal territories had an advantage over those from edge territories and local settlement rate could be reduced by a location favourable to emigration. In general, the effect of exits was to reduce the settlement rate of early fledging young while that of later young tended to increase. In highly fragmented woodland, fledging late from a well-connected edge territory would appear to be the worst case scenario.

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