A large-scale “experiment” to examine the effects of landscape context and habitat fragmentation on mammals

Lindenmayer, David B.; Cunningham, Ross B.; Pope, M

doi:10.1016/s0006-3207(98)00111-6

Cited by 110 publications

(117 citation statements)

References 32 publications

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“…Riparian habitats with different local habitat condition are likely to contain different bird species assemblages regardless of similar landscape contexts. While several studies have examined the influence of landscape context on fauna of different habitat types (Lindenmayer et al, 1999, Mazerolle and Villard, 1999, Wolff et al, 2002, Brotons et al, 2003, Collinge et al, 2003and Shriver et al, 2004 this is the first to examine the influence of landscape context specifically on birds of the riparian zone.…”

Section: Introductionmentioning

confidence: 99%

Is landscape context important for riparian conservation? Birds in grassy woodland

Martin

McIntyre

Catterall

et al. 2006

Biological Conservation

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An important challenge for riparian management is to determine the extent to which landscape context influences the faunal assemblages of riparian habitats. We examined this challenge in the variegated landscapes of southeastern Queensland, Australia where riparian vegetation is surrounded by both extensive grazing and intensive cropping. We investigated whether riparian habitats adjacent to different landuses support similar bird assemblages. Three types of riparian habitat condition were sampled (uncleared ungrazed; uncleared grazed; cleared grazed) in four different land-use contexts (ungrazed woodland; grazed woodland; native pasture; crop) although only six of the 12 possible treatment combinations were available. Eighty percent of bird species responded significantly to changes in both riparian habitat condition and landscape context, while fewer than 50% of species were significantly influenced by landscape context alone. The influence of landscape con-text on the bird assemblage increased as the surrounding land use became more intensive (e.g., woodland to native pasture to crop). Riparian zones have been shown to have consistently high biodiversity values relative to their extent. These findings suggest it is not enough to conserve riparian habitats alone, conservation and restoration plans must also take into consideration landscape context, particularly when that context is intensively used land.

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Section: Introductionmentioning

confidence: 99%

Is landscape context important for riparian conservation? Birds in grassy woodland

Martin

McIntyre

Catterall

et al. 2006

Biological Conservation

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“…Entre las principales acciones destaca proteger los árboles remanentes, cuidar los patrones de pastizales, manejar el fuego y reducir el impacto de las actividades humanas, específica-mente el de la explotación de madera, de los asentamientos, del trazo de carreteras y del uso de agroquímicos (Fitzimmons, 2003;Lapin, 2003;Gibbs, 2001;Fahrig, 2001;Verboom et al, 2001;Ford et al, 2001;Riitters et al, 2000;Lindenmayer et al, 1999;Wigley y Roberts, 1997y Ehrlich, 1996. En este sentido apunta la elección de fragmentos prioritarios para la conservación de los ecosistemas vegetales de la subcuenca del río Pilón, en los que inicialmente se sugiere implementar estrategias de manejo forestal que tiendan a un uso más racional de este valioso recurso (Tabla 5).…”

Section: Discussionunclassified

Fragmentación forestal en la subcuenca del río Pilón: diagnóstico y prioridades

Némiga

Garza

Jurado

2016

MYB

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RESUMENLa subcuenca del río Pilón es importante por la captación de agua para la agricultura comercial y por la conservación de la riqueza biológica del estado de Nuevo León. Sin embargo, se desconoce la magnitud de la fragmentación de sus bosques y matorrales, y no se han identificado los fragmentos remanentes prioritarios para conservar. Por lo tanto, este estudio evalúa la fragmentación de sus comunidades vegetales usando el tamaño del fragmento y la relación entre el perímetro y el área del fragmento (P/A) como indicadores de tamaño y forma, así como la distancia al vecino más próximo y el índice de intersección y yuxtaposición como indicadores de conectividad. Estos se calcularon en mapas generados mediante interpretación de imágenes de satélite Landsat de 1974 y 2000 (clasificación supervisada y estratificada). Los resultados muestran cambios estadísticamente significativos en el tamaño y forma de los fragmentos de todas las comunidades evaluadas, así como en su conectividad. Las comunidades más afectadas por la fragmentación en su forma y tamaño son el bosque de oyamel y de encino, así como el huizachal, el matorral submontano y el bosque de pino. En su conectividad, la fragmentación afecta sobre todo a los matorrales tipo tamaulipeco, submontano y desértico, así como los huizachales. En este estudio se evalúan los fragmentos prioritarios a conservar, considerando sus funciones como zonas de amortiguamiento y de estabilización de laderas, mediante la aplicación de criterios en un sistema de información geográfica. Al respecto se recomienda conservar 347 fragmentos para amortiguamiento y 210 fragmentos para estabilización de laderas.PALABRAS CLAVE: Conservación de recursos naturales, fragmentación forestal, Nuevo León, SIG, río Pilón. ABSTRACTThe watershed of the Pilón River is important for its water capture for commercial agriculture and for the conservation of the biological diversity of Nuevo Leon state. However, the magnitude of the forest and shrub fragmentation has not been determined, and the remaining fragments of higher conservation priority have not been identified. This study evaluates the vegetation fragmentation, using the fragment size and the relation between the perimeter and the fragment area (P/A) as indicators of size and shape, as well as the distance to the nearest neighbor and the intersection index and juxtaposition as connectivity indicators. These indicators were calculated in maps generated through satellite images Landsat of 1974 and 2000 interpretation (classification supervised and stratified). The results show statistically significant changes in the size and shape of fragments as well as in connectivity for all plant communities evaluated. The communities more affected by fragmentation in their size and shape were Abies and Oak forests, as well as the huizachal (Acacia scrub), piedmont scrub and

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“…Forests are moderately increasing in almost every distance classes possibly due to the abandonment of arable land and pastures, but they show a greater fragmentation compared to the past. Forest fragmentation may indicate an increasing environmental fragility, because large and intrinsicallyconnected forest patches have a critical role in providing habitat and sustaining ecosystem functions (Christian et al, 1998;Lindenmayer et al, 1999).…”

Section: Discussionmentioning

confidence: 99%

Land-Use Structure and Urbanization-Driven Land Fragmentation: Revisiting the Monocentric Model in a Sprawling Region

Ranalli¹,

Salvati²

2015

ESR&P

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A large-scale “experiment” to examine the effects of landscape context and habitat fragmentation on mammals

Cited by 110 publications

References 32 publications

Is landscape context important for riparian conservation? Birds in grassy woodland

Is landscape context important for riparian conservation? Birds in grassy woodland

Fragmentación forestal en la subcuenca del río Pilón: diagnóstico y prioridades

Land-Use Structure and Urbanization-Driven Land Fragmentation: Revisiting the Monocentric Model in a Sprawling Region

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