Effect of road traffic on amphibian density

Fahrig, Lenore; Pedlar, John H.; Pope, Shealagh E.; Taylor, Philip D.; Wegner, John

doi:10.1016/0006-3207(94)00102-v

Cited by 514 publications

(387 citation statements)

References 13 publications

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“…The association between genetic and geographical distances within Brighton was investigated further by examination of urban boundary development in the town over time from OS maps. The number of major roads and railways intersecting the intersite transects was also determined, as roads are known to be significant barriers to migrating amphibians (Cooke, 1972;Fahrig et al, 1995). Weighting the distance in kilometres by 1 x the proportion of the transect developed post-1932 improved correlation with the Cavalli-Sforza chord genetic distance slightly, to r = 0.58, P (Mantel) = 0.004 with town parks and r = 0.74, P (Mantel) = 0.001 without them.…”

Section: Genetic Analysismentioning

confidence: 99%

Genetic substructuring as a result of barriers to gene flow in urban Rana temporaria (common frog) populations: implications for biodiversity conservation

Hitchings

Beebee

1997

Heredity

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The ability to maintain small populations in quasi-natural settings is an issue of considerable importance in biodiversity conservation. The genetic structure of urban common frog (Rana temporaria) populations was determined by allozyme electrophoresis and used to evaluate the effects of restricted intersite migration. Despite the lack of any absolute barrier to movement between ponds, substantial genetic differentiation was found between sites separated by an average of only 2.3 km. Genetic distances between these town ponds correlated positively with geographical distances and were almost twice as great as those found between rural sites separated by an average of 41 km. Measures of genetic diversity and fitness were always lowest in the town, where the degree of subpopulation differentiation (FST =0.388) was high. Population decline was not evident in the town, but molecular and fitness data indicated the presence of genetic drift and inbreeding depression. The long-term survival of artificially restricted populations, particularly of relatively sedentary species, may require molecular monitoring, if genetic diversity is not to be lost by chance when facets of the species niche prove to be poorly understood.

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Section: Genetic Analysismentioning

confidence: 99%

Genetic substructuring as a result of barriers to gene flow in urban Rana temporaria (common frog) populations: implications for biodiversity conservation

Hitchings

Beebee

1997

Heredity

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“…Among the negative road impacts are situations of altered animal behaviour due to roads (reviewed in Trombulak and Frissell 2000), landscape impermeability to small (Richardson et al 1997;Gerlach and Musolf 2000) and larger mammals (Hansen 1983;Thiel 1985;McLellan and Shackleton 1988;Romin and Bissonette 1996) and increased amphibian mortality (Fahrig et al 1995;Carr andFahrig 2001, Cushman 2006). Physical and chemical conditions in areas subjected to road construction are altered (Trombulak and Frissell 2000) as are the hydrologic and geomorphologic attributes of a site (Jones et al 2000).…”

Section: Introductionmentioning

confidence: 99%

“…Merriam et al 1989;Vos and Chardon 1998), increased mortality (Rosen and Lowe 1994;Fahrig et al 1995;Barthelmess and Brooks 2010), habitat fragmentation and edge effects (Mader 1984;Andrews 1990;Soulé et al 1992;Thiollay 1993' Henjum et al 1994Wigley and Roberts 1994;Jaeger et al 2007;Roedenbeck et al 2007;Spellerberg 1998), invasion by exotic species (Lonsdale and Lane 1994), or increased human access to wildlife habitats (Graham et al 2010), all of which are expected to increase local extinction rates or decrease local recolonization rates.…”

Section: Introductionmentioning

confidence: 99%

Road effects on habitat richness of the Greek Natura 2000 network

Votsi¹,

Mazaris²,

Kallimanis³

et al. 2012

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The road network has both positive and negative ecological effects, and understanding these helps identify environmentally preferable solutions for transportation policy and planning. We investigated the relationship between road density and habitat type richness of Greek protected areas. We used digital vector maps of 214 sites included in the Greek Natura 2000 network. We calculated road density for the terrestrial part of each site and correlated it with habitat type richness. Average road density of protected areas (0.377 km/ km 2 ) was significantly lower than the national road density of Greece (0.446 km/km 2 ). We identified 32 sites that were not intersected by roads. These roadless sites were located at mountain tops, at islets, or in remote coastal zones. Overall we found no significant correlation between road density and habitat type richness. We suggest that the effect of road networks on habitat type richness is less apparent at landscapes with long history of human presence, because the landscape (and its habitat diversity) has coevolved with human activities over the past millennia. Our analysis provides a step towards quantifying the effect of road density on the diversity of habitats and consequently on species of conservation interest in international networks of protected areas such as the European Natura 2000 network.

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“…The presence of roads and traffic intensity can result in the direct mortality of amphibian species [149,150]. For instance, a study in Canada found that with increasing traffic intensity, the proportion of dead frogs and toads increased while the density decreased [149].…”

Section: Roadsmentioning

confidence: 99%

“…For instance, a study in Canada found that with increasing traffic intensity, the proportion of dead frogs and toads increased while the density decreased [149]. Another study, which recorded the deaths of newt and frog species during attempted road crossings, determined that velocity of the species and diurnal movement pattern of both species and vehicles influenced likelihood of road mortality [151].…”

Section: Roadsmentioning

confidence: 99%

Environmental and Anthropogenic Factors Influencing Salamanders in Riparian Forests: A Review

Clipp

Anderson

2014

Forests

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Salamanders and riparian forests are intimately interconnected. Salamanders are integral to ecosystem functions, contributing to vertebrate biomass and complex food webs in riparian forests. In turn, these forests are critical ecosystems that perform many environmental services, facilitate high biodiversity and species richness, and provide habitat to salamander populations. Due to the global decline of amphibians, it is important to understand, as thoroughly and holistically as possible, the roles of environmental parameters and the impact of human activities on salamander abundance and diversity in riparian forests. To determine the population responses of salamanders to a variety of environmental factors and anthropogenic activities, we conducted a review of published literature that compared salamander abundance and diversity, and then summarized and synthesized the data into general patterns. We identify stream quality, leaf litter and woody debris, riparian buffer width, and soil characteristics as major environmental factors influencing salamander populations in riparian forests, describe and explain salamander responses to those factors, and discuss the effects of anthropogenic activities such as timber harvest, prescribed fires, urbanization, road construction, and habitat fragmentation. This review can assist land and natural resource managers in anticipating the consequences of human activities and preparing strategic conservation plans. OPEN ACCESSForests 2014, 5 2680

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Effect of road traffic on amphibian density

Abstract: We studied the effect of traffic intensity on local abundance of anurans.

Cited by 514 publications

References 13 publications

Genetic substructuring as a result of barriers to gene flow in urban Rana temporaria (common frog) populations: implications for biodiversity conservation

Genetic substructuring as a result of barriers to gene flow in urban Rana temporaria (common frog) populations: implications for biodiversity conservation

Road effects on habitat richness of the Greek Natura 2000 network

Environmental and Anthropogenic Factors Influencing Salamanders in Riparian Forests: A Review

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