COST 341 — Habitat Fragmentation Due to Transportation Infrastructure: The European Review
About this book
COST 341 — Habitat Fragmentation Due to Transportation Infrastructure: The European Review, published in 2003 as the culmination of the European Cooperation in Science and Technology (COST) Action 341, is the most comprehensive scientific review of the ecological impacts of roads, railways, and other linear transport infrastructure on wildlife habitats and biodiversity across Europe. Compiled by researchers from 19 participating European countries, it synthesises two decades of research on habitat fragmentation, barrier effects, wildlife-vehicle collision mortality, and mitigation measures. The publication begins with a theoretical framework for habitat fragmentation: how transportation corridors divide continuous habitat into isolated patches, reducing effective population sizes, impeding gene flow between sub-populations, blocking seasonal migration routes, and increasing edge effects that degrade interior habitat quality.
The population viability analysis (PVA) methodology for assessing fragmentation impacts on minimum viable populations is explained, together with the landscape connectivity metrics — permeability, conductance, and least-cost path analysis — used to quantify barrier effects. A substantial section examines wildlife mortality caused by vehicle collisions, presenting national statistics on road-killed ungulates (deer, boar, elk), carnivores (badger, otter, lynx, wolf), reptiles, and amphibians, together with evidence on where these mortality concentrations occur — road-habitat interface zones, seasonal migration corridors, and river/valley crossings. The cumulative mortality impact on slow-reproducing species such as the European lynx, brown bear, and wolf is analysed in the context of metapopulation viability.
Mitigation measures are the focus of the most policy-relevant chapters. The document provides detailed technical specifications and effectiveness data for wildlife passages: fauna bridges (Grüne Brücken), underpasses of varying dimensions and substrate types for different target species, and amphibian tunnels with drift fencing systems. Case studies from Germany, Netherlands, Sweden, France, and Switzerland demonstrate mitigation effectiveness, with guidance on optimal spacing, lighting exclusion, vegetation design, and monitoring protocols.
The review examines road salt contamination of roadside habitats, noise pollution impacts on bird breeding success and territory selection, and artificial lighting effects on nocturnal wildlife behaviour. A dedicated chapter addresses the planning stage, providing guidance on environmental impact assessment (EIA) procedures, strategic environmental assessment (SEA), and the integration of ecological network maps into transport corridor routing decisions. This publication remains a cornerstone reference for transport ecology and infrastructure environmental management.