Rapid assessment of linear transport infrastructure in relation to the impact on landscape continuity for large ranging mammals

Kaphegyi, Thomas A. M.; Dees, Matthias; Zlatanova, Diana; Ueffing, Christoph; Dutsov, Aleksandar; Kaphegyi, Ursula

doi:10.1007/s10531-012-0409-9

Cited by 11 publications

(6 citation statements)

References 34 publications

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“…Overall, many studies agreed that crossing structures alone where not as effective as expected [98][99][100][101][102], and those studies that reported road mortality rates more often saw reductions ranging from 10 to 20% [103,104]. Nevertheless, two studies speculated that crossing structures were still biologically effective as low crossing frequencies may be enough to maintain functional connectivity [105,106].…”

Section: Survey Design and Mitigationmentioning

confidence: 97%

Effects of Road Density and Pattern on the Conservation of Species and Biodiversity

Bennett

2017

Curr Landscape Ecol Rep

137

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The development and presence of roads can reduce landscape permeability, lead to habitat loss, and increase habitat fragmentation. It is these fundamental changes in landscape structure that can have both direct and indirect impacts on the conservation of species and biodiversity. In this review, I examine 215 research studies conducted between 2011 and 2015 that explore the impacts of roads and road networks on a wide range of species. I divided these studies into four main categories: 1) the direct effects of roads on wildlife, 2) the indirect effects of roads on wildlife, 3) the consequences of road networks on wildlife populations, and 4) survey design and mitigation including both innovations and evaluations. I found that the majority of studies (38%) explored the indirect effects of roads on wildlife, including displacement, fitness consequences, and road crossing ability of wildlife. Nevertheless, despite there being a pressing need to understand how existing road networks impact wildlife and how increasing road density may influence local and regional population persistence, only 10% of the studies considered the implications of road networks on wildlife. However, there is an increasing trend towards the development of predictive models that can be used for a better understanding of road network impacts, assess landscape connectivity, and devise mitigation. This review also highlighted the continued need to devise and evaluate mitigation measures so transportation authorities and conservation practitioners may be better equipped to address the ecological implications of roads and proposed road development.

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Section: Survey Design and Mitigationmentioning

confidence: 97%

Effects of Road Density and Pattern on the Conservation of Species and Biodiversity

Bennett

2017

Curr Landscape Ecol Rep

137

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“…km (occasional habitat), with the population categorized as stable [ 3 ]. Against the background of these data, the number of 600–800 bears for the same period (2012), given by another source [ 29 ], seems rather exaggerated. In relation to a genetic analysis of the population for the period 2008–2012, about 368 samples of brown bear were gathered and analyzed, mainly from the region of the Rhodopes and to a lesser extent from the Balkan Mountain.…”

Section: Resultsmentioning

confidence: 99%

Status and Numbers of the Brown Bear (Ursus arctos L.) in Bulgaria

Serbezov

Spassov

2023

Animals

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Until recently, the Bulgarian bear population (Ursus arctos L.) was considered one of the significant ones in Europe and one of the few with more than 500 bears. While the numbers of some neighboring populations may be increasing, the Bulgarian population has been on a downward trend since the early 1990s. The probable numbers of the species at the end of the 1980s was about 700–750 individuals. Calculations based on field data from national monitoring and statistical analysis show probable numbers in Bulgaria in 2020 of about 500 individuals (data for the autumn state). This decline is mostly related to poaching due to weaker control activity, the reduction of forest areas and habitat fragmentation. The preservation of the Bulgarian population, which, together with the other Balkan populations and the Apennine bear, has a unique gene pool, is particularly important from the point of view of preserving the biodiversity of the species in Europe.

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“…Our results show that the distance from capybara habitat to roads and navigable rivers plays an important role in defining large areas of high habitat suitability. Negative effects of road access on ecosystems and habitat quality for other mammal species, such as an increase of poaching and traffic deaths, habitat loss, and changes in both structure and function of ecosystems, have been widely highlighted in other studies [e.g., 55,[64][65][66][67].…”

Section: Discussionmentioning

confidence: 99%

A Habitat Suitability Model for Capybara (Hydrochoerus Hydrochaeris) at Its Core Area in Argentina

Schivo

Kandus

Bolkovic

et al. 2015

Tropical Conservation Science

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Habitat loss is one of the main factors reducing wildlife diversity and restricting its conservation. Habitat suitability models are important tools for wildlife management and conservation in order to evaluate the impacts of human activities on wildlife habitats. The capybara (Hydrochoerus hydrochaeris) is a semi-aquatic rodent that lives in South American wetlands that are subject to heavy human use. A spatially explicit model of capybara´s Potential Habitat Suitability (PHS) was developed for the core area of its distribution in the humid subtropical region of Argentina. Predictive variables in this deductive model were related to capybara habitat requirements, and their values were obtained from existing published papers. The PHS model was performed using two data subsets that evaluated both ecological requirements and anthropogenic threats, resulting in two partial indices: Potential Ecological Suitability (PES), and Risk of Human Impact (RHI). The PES assesses vegetation cover and the presence of lentic and lotic freshwater bodies. The RHI estimates habitat fragmentation and accessibility of poachers. Variables for the habitat requirements were spatially expressed through Geographic Information Systems. The model accuracy assessment was performed through field work and achieved 72% of overall accuracy. Results indicate that 13% of the study area had the highest values of PHS index, characterized by the presence of vast wetlands, habitats with low fragmentation and low accessibility for poachers. These results are a useful tool to improve conservation and management programs for protection of capybara habitat.

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Rapid assessment of linear transport infrastructure in relation to the impact on landscape continuity for large ranging mammals

Cited by 11 publications

References 34 publications

Effects of Road Density and Pattern on the Conservation of Species and Biodiversity

Effects of Road Density and Pattern on the Conservation of Species and Biodiversity

Status and Numbers of the Brown Bear (Ursus arctos L.) in Bulgaria

A Habitat Suitability Model for Capybara (Hydrochoerus Hydrochaeris) at Its Core Area in Argentina

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