Comparison and development of new graph-based landscape connectivity indices: towards the priorization of habitat patches and corridors for conservation

Pascual-Hortal, Lucía; Saura, Santiago

doi:10.1007/s10980-006-0013-z

Cited by 656 publications

(539 citation statements)

References 20 publications

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“…Based on TM remote sensing image data and topographic map data, we determined the different landscape resistance values by investigating the vegetation of different land use types and human disturbance degree. We also referred others previous research results by PascualHortal andSaura. (2011) andLiu, et al (2010).…”

Section: Corridors Selection Processmentioning

confidence: 71%

Construction of green infrastructure in coal-resource based city: a case study in Xuzhou urban area

Chang

Liu

et al. 2018

Int J Coal Sci Technol

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As an important coal-resource based city in eastern China, coal mining activities have greatly promoted economic development to Xuzhou while resulted in kinds of blocks for sustainable development. Subsidence areas caused by coal mining activities and rapid urbanization process led to the losing of ecological function and decreasing of landscape connectivity in the city. As the important life-support system, urban green infrastructure (GI as short) has great significance in improving human well-beings. Taking Xuzhou urban area as the study object, this paper proposed a green infrastructure construction method based on the principle of ecological priority. Firstly, key ecological patches were identified by GIS and RS methods. Secondly, we established corridors by minimum cost path model. Then, we built GI network and evaluated the ecological importance of different patches. Finally, by comparing the status of patches and coal mining subsidence areas, we proposed a framework for constructing GI network in Xuzhou urban area.

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Section: Corridors Selection Processmentioning

confidence: 71%

Construction of green infrastructure in coal-resource based city: a case study in Xuzhou urban area

Chang

Liu

et al. 2018

Int J Coal Sci Technol

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“…For instance, oil well-driven landscape fragmentation has limited the habitat availability for area sensitive species, the redcrown crane (Grus japonensis), one of the state-listed endangered birds in this delta (Cao and Liu, 2007). Wetland habitat fragmentation or loss has increased the distances between desirable habitat (resource) patches and lead to impairment of patch connectivity, constraining the movements of individuals and hampering the conservation of this population (Pascual-Hortal and Saura, 2006;Yue et al, 2003). Therefore, stronger efforts focusing on oil well development within and near protected areas are needed.…”

Section: Discussionmentioning

confidence: 99%

Fragmentation effects of oil wells and roads on the Yellow River Delta, North China

Wang

2011

Ocean & Coastal Management

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“…Graph theory provides a powerful way to represent complex landscape patterns and perform advanced connectivity analyses. In graph theory, habitat patches are considered as nodes, and connections among them as edges, allowing investigations of a habitat network using graph techniques (Urban and Keitt 2001;Pascual-Hortal and Saura 2006). Connectivity measures based on graph theory can assess both structural and functional connectivity.…”

Section: Open Settlements 99mentioning

confidence: 99%

“…Therefore, it is important to highlight sources of possible uncertainties (including data and software uncertainties; Lehman and Ramil 2002;Lechner et al 2013;de Rigo 2013) in connectivity assessments and their consequences in order to give practitioners more guidance on how to assess connectivity to inform conservation planning. Uncertainties in connectivity assessments focused on connectivity measures and their behavior in response to variation in landscape structure were widely discussed (e.g., Goodwin and Fahrig 2002;Pascual-Hortal and Saura 2006;Saura and Pascual-Hortal 2007a;Baranyi et al 2011). As a result, limitations of many available connectivity measures have been indicated, together with practical solutions and recommendations on best performing ones.…”

Section: Introductionmentioning

confidence: 99%

Effects of different matrix representations and connectivity measures on habitat network assessments

et al. 2014

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Assessing landscape connectivity is important to understand the ecology of landscapes and to evaluate alternative conservation strategies. The question is though, how to quantify connectivity appropriately, especially when the information available about the suitability of the matrix surrounding habitat is limited. Our goal here was to investigate the effects of matrix representation on assessments of the connectivity among habitat patches and of the relative importance of individual patches for the connectivity within a habitat network. We evaluated a set of 50 9 50 km 2 test areas in the Carpathian Mountains and considered three different matrix representations (binary, categorical and continuous) using two types of connections among habitat patches (shortest lines and least-cost paths). We compared connections, and the importance of patches, based on (1) isolation, (2) incidencefunctional, and (3) graph measures. Our results showed that matrix representation can greatly affect assessments of connections (i.e., connection length, effective distance, and spatial location), but not patch prioritization. Although patch importance was not much affected by matrix representation, it was influenced by the connectivity measure and its parameterization. We found the biggest differences in the case of the integral index of connectivity and equally weighted patches, but no consistent pattern in response to changing dispersal distance. Connectivity assessments in more fragmented landscapes were more sensitive to the selection of matrix representation. Although we recommend using continuous matrix representation whenever possible, our results indicated that simpler matrix representations can be also used as a proxy to delineate those patches that are important for overall connectivity, but not to identify connections among habitat patches.

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Comparison and development of new graph-based landscape connectivity indices: towards the priorization of habitat patches and corridors for conservation

Cited by 656 publications

References 20 publications

Construction of green infrastructure in coal-resource based city: a case study in Xuzhou urban area

Construction of green infrastructure in coal-resource based city: a case study in Xuzhou urban area

Fragmentation effects of oil wells and roads on the Yellow River Delta, North China

Effects of different matrix representations and connectivity measures on habitat network assessments

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