Awareness of the adverse ecological effects of road and other large construction projects has resulted in a rapidly growing demand to quantitatively predict and evaluate the effects on gene flow among plants and anima...Awareness of the adverse ecological effects of road and other large construction projects has resulted in a rapidly growing demand to quantitatively predict and evaluate the effects on gene flow among plants and animals in natural habitats.In this study,we evaluated the effects of different road construction scenarios on animal species movement by using the methods of ecological landscape connectivity in the typical regions of Yunnan Province,China.The results showed landscape connectivity levels(Probability of Connectivity(PC))decreased after road construction and species with lower dispersal abilities were more affected to the subsequent habitat fragmentation.First level roads affected landscape connectivity most significantly.At a distance of 100 m,the PC index decreased more than 50%.Further analysis suggested that the use of landscape connectivity to assess landscape processes revealed the adverse effects on the species movement more effectively compared with the traditional landscape pattern analysis.In addition,we conducted a graph theory and a least-cost modeling discussion,it is obvious that they are powerful tools to represent and analyze landscape networks with respect to related species movement.Network analysis offers a quantitative and simple but effective tool for ecological process assessment and biological conservation on large scales.展开更多
Ecological restoration and reconstruction refers to how to prevent the main factors and processes from further degrading the ecosystem, as well as how to regulate and optimize the exchanging process and the space-time...Ecological restoration and reconstruction refers to how to prevent the main factors and processes from further degrading the ecosystem, as well as how to regulate and optimize the exchanging process and the space-time cycling system of substance, energy and information through man force, in order to restore the structure, function and eco-potentiality back to the original level or even higher, with the help of certain biological, ecological and engineering techniques. Ecological restoration and reconstruction involves problems of different levels and different fields, with the focus on the ecosystem （species communities）, the landscape and certain areas. Problems in the process of road-area ecosystem construction are as follows： attention is paid to the conditions of the road itself and the short-term effects, not to the natural propagation of species within the whole road-area or the ecological safety area; the importance of biological diversity in ecological restoration is neglected; the property of heterogeneity necessary for a sound ecosystem is ignored; the ecological interaction among species doesn＇t earn enough attention; properties like localization and adaptability in different districts are not paid enough attention. Landscape ecology can guide the work of road-area ecosystem restoration, through the space pattern.展开更多
基金Under the auspices of Nonprofit Environment Protection Specific Project of China(No.201209029-4)
文摘Awareness of the adverse ecological effects of road and other large construction projects has resulted in a rapidly growing demand to quantitatively predict and evaluate the effects on gene flow among plants and animals in natural habitats.In this study,we evaluated the effects of different road construction scenarios on animal species movement by using the methods of ecological landscape connectivity in the typical regions of Yunnan Province,China.The results showed landscape connectivity levels(Probability of Connectivity(PC))decreased after road construction and species with lower dispersal abilities were more affected to the subsequent habitat fragmentation.First level roads affected landscape connectivity most significantly.At a distance of 100 m,the PC index decreased more than 50%.Further analysis suggested that the use of landscape connectivity to assess landscape processes revealed the adverse effects on the species movement more effectively compared with the traditional landscape pattern analysis.In addition,we conducted a graph theory and a least-cost modeling discussion,it is obvious that they are powerful tools to represent and analyze landscape networks with respect to related species movement.Network analysis offers a quantitative and simple but effective tool for ecological process assessment and biological conservation on large scales.
文摘Ecological restoration and reconstruction refers to how to prevent the main factors and processes from further degrading the ecosystem, as well as how to regulate and optimize the exchanging process and the space-time cycling system of substance, energy and information through man force, in order to restore the structure, function and eco-potentiality back to the original level or even higher, with the help of certain biological, ecological and engineering techniques. Ecological restoration and reconstruction involves problems of different levels and different fields, with the focus on the ecosystem （species communities）, the landscape and certain areas. Problems in the process of road-area ecosystem construction are as follows： attention is paid to the conditions of the road itself and the short-term effects, not to the natural propagation of species within the whole road-area or the ecological safety area; the importance of biological diversity in ecological restoration is neglected; the property of heterogeneity necessary for a sound ecosystem is ignored; the ecological interaction among species doesn＇t earn enough attention; properties like localization and adaptability in different districts are not paid enough attention. Landscape ecology can guide the work of road-area ecosystem restoration, through the space pattern.
