Replacement of culvert styles has minimal impact on benthic macroinvertebrates in forested, mountainous streams of Northern California

作者: Justin E. Lawrence , Matthew R. Cover , Christine L. May , Vincent H. Resh

DOI: 10.1016/J.LIMNO.2014.02.002

关键词: CulvertEnvironmental scienceInvertebrateEcologyHabitatAbundance (ecology)Channel (geography)Species richnessSTREAMSBenthic zone

摘要: Abstract Culvert styles are being replaced on many road-stream crossings to provide long-term (>2 years) benefits, but these projects may result in short-term (0–2 biological impacts. We quantified the effects of replacing steel-pipe culverts with open-arch structures benthic-macroinvertebrate communities 6 streams Klamath National Forest Northern California USA. Physical habitat showed notable site-specific channel form and sedimentation, no significant change among sites. In contrast, we observed small though impacts culvert style replacement benthic macroinvertebrates sites, including a statistically reduction both taxa richness ( p  = 0.012) abundance intolerant  = 0.004). Moreover, there was also modest evidence slightly elevated variability downstream following style. The benefits that have been other studies outweigh minor, streams.

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