Evaluating riparian solutions to multiple stressor problems in river ecosystems - A conceptual study.

摘要: Rivers are among the most sensitive of all ecosystems to effects global change, but options prevent, mitigate or restore ecosystem damage still inadequately understood. Riparian buffers widely advocated as a cost-effective option manage impacts, empirical evidence is yet identify ideal riparian features (e.g. width, length and density) which enhance ecological integrity protect services in face catchment-scale stressors. Here, we use an extensive literature review synthesise on buffer catchment management instream environmental conditions nutrients, fine sediments, organic matter), river organisms functions. We offer conceptual model mechanisms through might impact streams either positively negatively. The distinguishes scale-independent benefits (shade, thermal damping, matter large wood inputs) that arise from at any scale scale-dependent (nutrient sediment retention) reflect stressor broader (sub-catchment catchment) scales. latter require concerted efforts over equally domains combined with nutrient restrictions). relationships between configuration (width, length, zonation, consistent, suggesting high certainty effects. In contrast, well biological responses more uncertain, ongoing diffuse pollution (nutrients, sediments), also sources variability hydrology, climate) scales may interfere local management. Without across relevant scales, full recovery damaged lotic unlikely. There is, nevertheless, sufficient outweigh potential adverse effects, particular if located upstream part stream network. This supports restoration no-regrets improve sustain functioning biodiversity.