View source for Allan 2004 land use and stream ecosystems

{{product}}[[category:document]] [[Category:Land Use]] [[category:toxics]] [[category:watershed]] [[category:stormwater]]

'''Allan, D.J. 2004.  Landscapes and riverscales: the influence of land use on stream ecosystems.  Annual Review of Ecological and Evolutionary Systems, vol. 35, pp.257-284.'''

==Notes==
*Provides a literature review and synthesis about how land use at different scales affects stream ecosystem condition.
*Suggests six mechanisms of land use influence: sedimentation, nutrient enrichment, contaminant pollution, hydrologic alteration, riparian canopy opening, loss of wood debris.
*Defines four challenges in evaluating land use impacts:
**Covariation of natural and human features--people alter landscapes in patterns that also reflect changes in landscape function.
**Scales of influence relative to site:  catchment, riparian buffer, reach buffer.
**Nonlinearity
**Legacy effects--where dramatic historical changes to ecosystem structure or process are still driving condition
*Conclusions in relation to management are limited:
**Complex indicator arrays may be more diagnostic than indices.
**Reversion to historical conditions is usually not viable, and so we depend on BMPs, which require skillful application.
**One size all management is unlikely to be as cost effective as solutinos tailored to context.