Bad Roads, Good Roads

Laurance, William F.

doi:10.1002/9781118568170.ch2

Cited by 36 publications

(15 citation statements)

References 26 publications

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“…Roads have been associated with human settlements since historical time to facilitate the movement of goods and travel of people around the world (Forman et al 2003;Coffin 2007;Liu et al 2013;van der Ree et al 2015). Therefore, roads play a role in stimulating economic growth and development of the regions (Laurance 2015). In contrast, roads are also known as one of the most critical threats to species existence (Forman et al 2003;Coffin 2007;van der Ree et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Impact of highway on vertebrate roadkill in Nam Nao National Park, Thailand

et al. 2020

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Abstract. Kummoo W, Teampanpong J, Paansri P, Suksavate W, Utsa P, Duengkae P, Prompat S. 2020. Impact of highway on vertebrate roadkill in Nam Nao National Park, Thailand. Biodiversitas 21: 5540-5550. Roads lead to biodiversity loss, primarily through wildlife collisions. This phenomenon is widespread, despite limited attention in Thailand. To reduce road mortality, the roadkilled species and their distributions along the road become a significant component for designing management strategies. We surveyed vertebrate mortality covering 44 kilometers of Highway 12, passing through Nam Nao Nation Park in Phetchabun Province of Thailand for 34 replicates between August 2018 and July 2019. We recorded 1,389 carcasses of 578 amphibians, 540 reptiles, 190 mammals and 81 birds. The rate of wildlife-vehicle collisions (WVCs) was 1.089 ± 0.823 carcasses-km-1day-1, comprised mostly of amphibians. The distribution pattern of WVCs was arranged in spatial clusters. Five wildlife collision hotspots for four taxa groups were identified. Overall, the WVC presence was positively associated with vegetation types but negatively associated with distance to the forest edge, the presence of road barriers and the number of road lane. Concurrently, the numbers of roadkill incidents were positively associated with amphibians more than other vertebrate groups, the night time and number of daily vehicles. Our results suggest that WVC rates on HW12 vary among taxonomic groups, temporal scales and environmental factors. It highlights key hotspots where mitigation strategies should be implemented for biodiversity conservation.

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Section: Introductionmentioning

confidence: 99%

Impact of highway on vertebrate roadkill in Nam Nao National Park, Thailand

et al. 2020

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“…Over 20 km of road and 14 km of electricity transmission lines through Tapanuli orangutan habitat are planned, and at least 3 million m3 of excavated spoil is planned to be dumped in orangutan habitat (Comanditaire Venotschap (CV) Global Inter System, , ). Furthermore, it is well‐established that infrastructure development, especially roads, can facilitate human access into previously inaccessible areas, eventually leading to additional and often unrestricted levels of habitat degradation and loss, hunting, and/or human‐animal conflict (Laurance, ; Laurance & Arrea, ; van der Ree, Smith, & Grilo, ).…”

mentioning

confidence: 99%

The Tapanuli orangutan: Status, threats, and steps for improved conservation

Wich

Fredriksson²,

Usher³

et al. 2019

Conservat Sci and Prac

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“…Understanding seasonal changes in avian diversity and how they are affected by human impacts is crucial to improve management alternatives capable of ameliorating the ecological effects of roads in tropical regions. The extent of the road network and traffic volume are expected to increase in the next decade across the Tropics (Laurance, 2015), and thus, it is critical to understand the impacts of roads on sensitive species, especially in regions bordering and bisecting protected areas. The results of this study are relevant to increase our knowledge on turnover rates of tropical birds, establish a baseline for future studies, and identify groups sensitive to road disturbances.…”

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confidence: 99%

Effect of a major highway on the spatial and temporal variation in the structure and diversity of the avifauna of a tropical premontane rain forest

Ávalos

Bermúdez

2016

RBT

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Roads immersed in conservation areas will increase in number, size, and traffic over the next decade, and thus, understanding their effects on forest-dependent wildlife is crucial for improving current management practices and reducing the negative impacts of roads on sensitive species. We examined the influence of route 32 (a.k.a. Guápiles Highway) on temporal and spatial changes in the structure of the avifauna of Braulio Carrillo National Park, Costa Rica, a site crossed by this road along 25 km. The highway connects the capital city of San José with the Harbor of Limón in the Caribbean Sea (142 km). Although the road is narrow (12 m in width and comprised by two lanes along most of the route) it services over 1.5 million motor vehicles per year, 12 % are heavy trucks and trailers. We expected the highway to divide the avifauna, and thus to observe significant differences in species structure on opposite sides of the road. We described changes in bird diversity between wet and dry seasons at Las Palmas and Ceibo trails located on opposite sides of the highway (14 point counts per trail), and evaluated how abundance and diversity varied with road distance. Censuses took place during wet and dry seasons from 2002 to 2005. We listed 245 species and 6 035 observations during the 4-yr survey. Rare species dominated the avifauna (65 % of species < 5 observations), and species overlap between trails was high (Sorensen= 71 %; Morisita= 0.96). Species accumulation curves varied little among trails, yielding 190 species. Resident species represented 70 % of observations, followed by elevational (15 %) and long-distance migrants (1-2 %). Understory species were the most abundant (60 %) followed by canopy birds (30 %). Species turnover rate was 55 % between seasons, but species composition between trails remained homogeneous. Overall, birds were avoiding the road (abundance increased away from the road) although other diversity parameters (richness, dominance, Shannon index, and equitability) were not influenced by road proximity. Although the avifauna remained homogeneous on both sides of the road, which did not support the fragmentation hypothesis, the highway reduced the abundance and diversity of specialized understory insectivores associated with primary forests near the road. This highway will expand outside the National Park (from 2 to 4 lanes along 107 km from Río Frío to Limón) in the next years, which will increase traffic volume and road impacts within the Park. Roads are increasing across highly diverse tropical areas justifying the need for management practices based on the identification of sensitive groups. Rev. Biol. Trop. 64 (4): 1383-1399. Epub 2016 December 01.

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Bad Roads, Good Roads

Cited by 36 publications

References 26 publications

Impact of highway on vertebrate roadkill in Nam Nao National Park, Thailand

Impact of highway on vertebrate roadkill in Nam Nao National Park, Thailand

The Tapanuli orangutan: Status, threats, and steps for improved conservation

Effect of a major highway on the spatial and temporal variation in the structure and diversity of the avifauna of a tropical premontane rain forest

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