Movement of forest birds across river and clearcut edges of varying riparian buffer strip widths

Shirley, Susan M.

doi:10.1016/j.foreco.2005.10.071

Cited by 15 publications

(10 citation statements)

References 47 publications

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“…Forest specialists are often hesitant to cross boundaries marked by extreme structural contrast, such as the interface between forest and cleared land (Wiens et al. 1985; Norris & Stutchbury 2001; Shirley 2006). A contributing factor might be that forest species have had little reason to traverse clearings in their evolutionary history; therefore the avoidance of such areas might be an innate response (Greenberg 1989).…”

Section: Discussionmentioning

confidence: 99%

“…However, relatively few studies have empirically examined how individual movement pathways are influenced by landscape structure (Desrochers & Hannon 1997; Robichaud et al. 2002; Shirley 2006). Mark‐recapture, radiotelemetry and translocation studies provide critical information on long‐distance movements and have established that movement might be disrupted by habitat fragmentation (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Gap‐crossing decisions of forest birds in a fragmented landscape

Robertson

Radford²

2009

Austral Ecology

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Habitat loss and fragmentation are recognized as primary drivers of biodiversity loss worldwide. To understand the functional effects of habitat fragmentation on bird populations, data on movement across gaps in habitat cover are necessary, although rarely available. In this study, we used call playback to simulate a conspecific territorial intruder to entice birds to move through the landscape in a predictable and directional manner. We then quantified the probability of movement in continuous forest and across cleared gaps for two forest-dependent species, the grey shrike-thrush (Colluricincla harmonica) and the white-throated treecreeper (Cormobates leucophaeus). Fifty-four playback trials were conducted for each species across distances ranging from 25 to 480 m in continuous forest and 15-260 m across gaps in a forest-agricultural landscape in southern Victoria, Australia. The probability of movement was significantly reduced by gaps in forest cover for both species. Shrike-thrushes were six times more likely to move 170 m in continuous forest than to cross 170-m gaps.The mean probability that treecreepers would cross any gap at all was less than 0.5, and they were three times less likely to move 50 m across a gap than through continuous forest. Both species displayed non-linear responses to increasing gap distance: we identified a gap-tolerance threshold of 85 m for the shrike-thrush and 65 m for the treecreeper beyond which individuals were most unlikely to cross. The presence of scattered paddock trees increased functional connectivity for the shrike-thrush, with individuals crossing up to 260 m when scattered trees were present. We conclude that gaps in habitat cover are barriers to movement, and that characteristics of the intervening matrix influence landscape permeability.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gap‐crossing decisions of forest birds in a fragmented landscape

Robertson

Radford²

2009

Austral Ecology

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“…Human transformation of land cover and land use are the primary causes of biodiversity loss (Haines-Young 2009). As a consequence, continuous habitats are being divided into discontinuous patches, which affects population recruitment (Robinson et al 1995;Smith & Hellmann 2002), survival (Harris 1984) and movement (Shirley 2006;Tucker et al 2018) of terrestrial animal species (Suárez-Seoane et al 2008;Tucker et al 2018).…”

mentioning

confidence: 99%

Habitat modeling of the common pheasant Phasianus colchicus (Galliformes: Phasianidae) in a highly modified landscape: application of species distribution models in the study of a poorly documented bird in Iran

Ashoori¹,

Kafash

Moradi

et al. 2018

The European Zoological Journal

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The common pheasant is listed as a nationally protected species in Iran because it faces many threats such as habitat destruction, pollution from pesticides and overhunting. The species' habitat selection remains unknown in Iran; consequently, conservation planning for the species is hampered by this lack of information. In this study we used predictor variables including topographic, anthropogenic, land cover and climate and 122 occurrence points to model the distribution of common pheasant (subspecies P. c. talischensis), in Gilan province, Iran. The results showed that distance to agriculture and orchards as well as distance to plantation forests were the most important variables in predicting species distribution. Furthermore, we found that the total potential suitable habitat for the species in Gilan province is 315,990 hectares. We observed a shift of the species to higher altitudes in the province. We recommend raising awareness about the presence of the species especially among private landowners, creating a network of protected areas on private land, and changing land-use policies at the provincial level as essential measures for the conservation of the species in Gilan province. Our results can be applied to management and conservation of the species in other modified or rapidly changing landscapes.

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“…). Forest interior bulbuls such as these would be expected to forage within their small home ranges and thus are likely to disperse seeds over relatively short distances compared with non‐territorial or larger bodied species (Shirley , Dennis & Westcott ). In this case, with an average home range of only 2.2 ha that is roughly circular in shape, maximum dispersal distance would be expected to be less than 170 m. We discuss below evidence relating to the four predictions made in the Introduction.…”

Section: Discussionmentioning

confidence: 99%

Behavioral and Social Structure Effects on Seed Dispersal Curves of a Forest‐Interior Bulbul (Pycnonotidae) in a Tropical Evergreen Forest

et al. 2014

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Movement patterns of animals can vary dramatically as a function of their reproductive cycle or social structure; however, little is known about how changes in the social structure of dispersers affect patterns of seed dispersal. We examined the movement patterns of the forest-dwelling and cooperatively breeding Puff-throated Bulbul (Alophoixus pallidus) in relation to different stages of their reproductive cycle, time of day, and group size, to determine potential impacts on the shape and scale of dispersal curves generated using a combination of gut passage time and displacement distance data. There were significant differences in dispersal distances depending on group size, season (breeding, non-breeding), incubation (vs. other times of the year), and time of the day. The estimated median seed dispersal distance was 28 m. The median dispersal distances produced by birds in larger groups were longer than those of smaller groups (29 m vs. 25 m). During the breeding season, median dispersal distances were longer than during the non-breeding season (31 m vs. 25 m), but the median dispersal distances were significantly shorter during incubation than during outside incubation (24 m vs. 28 m). The median dispersal distance produced in the early morning (30 m) was also longer than that of other times of the day (23 m late morning, 28 m early afternoon, and 26 m late afternoon). This study suggests that various aspects of an animal's behavior are likely to have significant effects on seed shadows and that this may vary significantly even among individuals of the same species.Abstract in Thai is available in the online version of this article.

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Movement of forest birds across river and clearcut edges of varying riparian buffer strip widths

Cited by 15 publications

References 47 publications

Gap‐crossing decisions of forest birds in a fragmented landscape

Gap‐crossing decisions of forest birds in a fragmented landscape

Habitat modeling of the common pheasant Phasianus colchicus (Galliformes: Phasianidae) in a highly modified landscape: application of species distribution models in the study of a poorly documented bird in Iran

Behavioral and Social Structure Effects on Seed Dispersal Curves of a Forest‐Interior Bulbul (Pycnonotidae) in a Tropical Evergreen Forest

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