Influence of Landscape Features on Forest Maturity: the Case of a Fragmented Landscape in the erra do Mar Coastal Forest in Brazil

Freitas, Sérgio de; Lignani, Leonardo; Cabral, Diogo C.

doi:10.4322/natcon.2011.025

Cited by 4 publications

(1 citation statement)

References 17 publications

(38 reference statements)

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“…The vegetation of both forest fragments is also classified as ombrophilous dense forest (IBGE ), but with a history of disturbances resulting in a discontinuous canopy about 20 m high, a relatively open understory, and increased presence of A. aculeatissimum , Cecropia spp., vines and lianas (details in Cabral & Fiszon ; Freitas et al . ).…”

Section: Methodsmentioning

confidence: 97%

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

et al. 2018

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One of the major challenges in animal ecology is to understand the factors and processes driving movement behaviour. Although density may influence movement patterns, the occurrence and nature of density-dependence in animal movements are still unclear, particularly whether it may vary among populations of a species, or across time within a population. Here, we evaluate the occurrence and nature of densitydependence in the movements of a Neotropical marsupial, the Grey four-eyed opossum Philander frenatus (Didelphidae, Didelphimorphia). We quantified fine-scale path tortuosity of individuals inhabiting continuous forest areas and forest fragments, in different climatic seasons (humid vs. super-humid). We also determined the relative importance of population size compared to sex and body mass on movements, using a modelselection approach. In forest fragments, path tortuosity increased with population size in the super-humid season, but decreased in the humid season. In the continuous forest, path tortuosity was affected only by sex and body mass, being slightly higher in males and negatively related to body mass. The occurrence of density-dependence on movements only in forest fragments is likely to reflect the higher overall density of P. frenatus in small forest fragments. The variation in the nature of density-dependence between climatic seasons is likely to reflect a trade off between foraging over large areas (humid season, low resource availability) versus avoiding agonistic encounters (super-humid season, high resource availability). Our results show that (i) density-dependence in movements may be context-dependent occurring only in areas of relatively high overall population density; and (ii) density may affect movements in different ways at different climatic seasons.

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Section: Methodsmentioning

confidence: 97%

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

et al. 2018

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Comparison of temporal and spatial changes in three major tropical forests based on MODIS data

Yin

2018

J. For. Res.

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Changes in aboveground locomotion of a scansorial opossum associated to habitat fragmentation

Delciellos

Ribeiro

Prevedello

et al. 2020

Journal of Mammalogy

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Habitat fragmentation may affect animal movement patterns due to changes in intra- and interspecific interactions as well as in habitat quality and structure. Although the effects of habitat fragmentation on terrestrial movements are relatively well-known, it is unclear whether and how they affect aboveground locomotion of individuals. We compared aboveground locomotion of a Neotropical small mammal, the gray four-eyed opossum, Philander quica, between two forest fragments and two areas of continuous forest in the Brazilian Atlantic Forest. We 1) quantified support availability and tested for active selection of different support diameters and inclinations by individuals; and 2) compared support diameters and inclinations used (observed values) among areas and between males and females. Both males and females selected supports based on diameters and inclinations in forest fragments. In continuous forests sites, females selected supports based on diameters and inclinations, but males selected only support diameters. Frequency of support diameter use differed significantly between forest fragments and continuous forest sites and between males and females. Frequency of support inclination use differed significantly between areas only for females, and between sexes only in continuous forest sites. Sex-related differences in support selection and use are likely related to differences in body size and conflicting energetic and behavioral demands related to use of arboreal space. Site-related differences in aboveground movements likely reflect the effects of forest edges that result in increased use of thinner supports in forest fragments. These results complement our previous findings that habitat fragmentation reduces daily home ranges and increases the total amount of aboveground locomotion of P. quica, and provide a more thorough picture of how forest-dependent species are able to use and persist in small forest fragments.

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Influence of Landscape Features on Forest Maturity: the Case of a Fragmented Landscape in the erra do Mar Coastal Forest in Brazil

Cited by 4 publications

References 17 publications

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

Negative or positive density‐dependence in movements depends on climatic seasons: The case of a Neotropical marsupial

Comparison of temporal and spatial changes in three major tropical forests based on MODIS data

Changes in aboveground locomotion of a scansorial opossum associated to habitat fragmentation

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