当前位置：
X-MOL 学术
›
River Res. Appl.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Toward natural approaches in restoration: Experiments of co-evolving physical and biological structures in a self-organizing step-pool channel
River Research and Applications ( IF 1.7 ) Pub Date : 2021-08-30 , DOI: 10.1002/rra.3851 Anne Chin 1 , Alison P. O'Dowd 2 , Patina Mendez 3 , Katrina Velasco 3 , Joan L. Florsheim 4 , Laura R. Laurencio 1 , Roger D. Leventhal 5
River Research and Applications ( IF 1.7 ) Pub Date : 2021-08-30 , DOI: 10.1002/rra.3851 Anne Chin 1 , Alison P. O'Dowd 2 , Patina Mendez 3 , Katrina Velasco 3 , Joan L. Florsheim 4 , Laura R. Laurencio 1 , Roger D. Leventhal 5
Affiliation
Although the science and practice of river restoration has progressed in recent years toward more natural approaches, few example projects of headwater step-pool channels exist in the literature. This study examined a restoration design in the headwaters of Wildcat Creek (Berkeley, California, USA) that allowed the creek to form its own stable morphology, instead of utilizing an engineered form. The creation of an experimental reach—where natural flows redistributed randomly placed clasts into step-pool sequences after construction of an initial plane-bed channel—afforded opportunity to test hypotheses regarding a co-evolution of self-organizing geomorphic and ecological responses over time. During three seasons following the initial restoration, we documented how the streambed self-organized into step-pool sequences by constructing plan maps and surveying changes in channel morphology. Concurrently, we sampled benthic macroinvertebrates in step, pool, and intermediate run habitats in the experimental reach and in an upstream reference reach. Results showed how natural flows created a characteristic step-pool pattern quickly following the second post-construction storm season. Taxonomic and functional metrics revealed that benthic macroinvertebrate communities assembled at a similarly rapid pace, becoming more distinct and diverse among habitat types as the step-pool morphology developed. Multivariate ordination revealed that the benthic macroinvertebrate community in the experimental reach became more similar to that in the reference reach over time. Findings suggest a rapid morphologic and ecological co-organization in the development of a complex stable step-pool channel, giving promise for natural approaches in future restoration designs of “letting the river do the work,” to the extent afforded by local socioeconomic factors.
更新日期：2021-08-30
京公网安备 11010802027423号