Đánh giá rủi ro sinh thái khu vực đã được tiến hành cho sông núi lưu vực ở Tasmania, Australia. Các mô hình nguy cơ tương đối (RRM) đã được sử dụng trong kết hợp với hệ thống thông tin địa lý (GIS) giải thích. các bên liên quan giá trị được sử dụng để phát triển thiết bị đầu cuối đánh giá, và những căng thẳng trong khu vực và môi trường sống được xác định. Các giả thuyết rủi ro được thể hiện trong mô hình khái niệm được rằng nông nghiệp và thanh toán bù trừ đất cho phát triển dân cư. | Chapter 8 Developing a Regional Ecological Risk Assessment A Case Study of a Tasmanian Agricultural Catchment Rachel Walker Wayne G. Landis and Philip Brown contents The Relative Risk Problem The Risk Defining Assessment Endpoints within the Mountain River Identifying Stressors in the Identifying Habitats in the Interaction of Stressors and Habitats Risk Hypotheses in the Conceptual Risk Analysis Using the Relative Risk Identifying Risk Ranking Ranking Relative Risk Calculations Using the Conceptual Risk Sensitivity A Basis for Discussion Regional Risk Previously published in the Journal of Human and Ecological Risk Assessment 7 2 2001. Reprinted with permission. 159 2005 by CRC Press LLC 160 REGIONAL SCALE ECOLOGICAL RISK ASSESSMENT INTRODUCTION A regional ecological risk assessment was conducted for the Mountain River catchment in Tasmania Australia. The relative risk model RRM was used in conjunction with geographic information systems GIS interpretations. Stakeholder values were used to develop assessment endpoints and regional stressors and habitats were identified. The risk hypotheses expressed in the conceptual model were that agriculture and land clearing for rural residential development are producing multiple stressors that have potential for contamination of local water bodies eutrophication changes in hydrology reduction in the habitat of native flora and fauna reductions in populations of beneficial insects in agricultural production systems increased weed competition in pastures and loss of aesthetic value in residential areas. In the risk analysis the catchment was divided into risk regions based on topography and landuse. Stressors were ranked on likelihood of occurrence while habitats were ranked on .
