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首页> 外文期刊>Journal of the American Water Resources Association >STREAM CONDITION IN PIEDMONT STREAMS WITH RESTORED RIPARIAN BUFFERS IN THE CHESAPEAKE BAY WATERSHED
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STREAM CONDITION IN PIEDMONT STREAMS WITH RESTORED RIPARIAN BUFFERS IN THE CHESAPEAKE BAY WATERSHED

机译：CHESAPEAKE湾流域含还原RIBULIA泡沫的皮埃蒙特湾流状况。

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This study tested the efficacy of restored forest riparian buffers along streams in the Chesapeake Bay watershed by examining habitat, selected water quality variables, and benthic macroinvertebrate community metrics in 30 streams with buffers ranging from zero to greater than 50 years of age. To assess water quality we measured in situ parameters (temperature, dissolved oxygen, and conductivity) and laboratory-analyzed grab samples (solubles reactive phosphorus, total phosphorus, nitrate, ammonium, and total suspended solids). Habitat conditions were scored using the Environmental Protection Agency Rapid Bioassessment Protocols for high gradient streams. Benthic macroinvertebrates were quantified using pooled riffle/run kick samples. Results showed that habitat, water quality, and benthic macroinvertebrate metrics generally improved with age of restored buffer. Habitat scores appeared to stabilize between 10 and 15 years of age and were driven mostly by epifaunal substrate availability, sinuosity, embeddedness, and velocity depth regime. Benthic invertebrate taxa richness, percent Ephemeroptera, Plecoptera, Trichoptera minus hydropsychids (%EPT minus H), % Ephemeroptera, and the Family Biotic Index were among the metrics which improved with age of buffer zone. Results are consistent with the hypothesis that forest riparian buffers enhance instream habitat, water quality, and resulting benthic macroinvertebrate communities with noticeable improvements occurring within 5-10 years postrestoration, leading to conditions approaching those of long established buffers within 10-15 years of restoration.
机译：这项研究通过检查30个溪流（零年龄到50岁以上）中的栖息地，选定的水质变量和底栖大型无脊椎动物群落指标，测试了切萨皮克湾流域沿岸溪流恢复的森林河岸缓冲带的功效。为了评估水质，我们测量了现场参数（温度，溶解氧和电导率）和实验室分析的样品（可溶性磷，总磷，硝酸盐，铵和总悬浮固体）。使用环境保护局快速生物评估规程对高梯度流的生境条件进行评分。使用合并的浅滩/奔跑踢样本对底栖大型无脊椎动物进行定量。结果表明，栖息地，水质和底栖大型无脊椎动物指标通常随着恢复缓冲液的年龄而改善。栖息地评分似乎稳定在10至15岁之间，并且主要受表皮基质可用性，弯曲度，嵌入度和速度深度机制的影响。底栖无脊椎动物类群的丰富度，星翅目百分数，鞘翅目，毛鳞翅目减去水生精神科动物的百分比（％EPT减去H），星翅目百分比和家庭生物指数是随着缓冲区年龄的增长而改善的指标。结果与以下假设相符：森林河岸缓冲带可改善河内生境，水质以及由此产生的底栖大型无脊椎动物群落，在恢复后的5-10年内会发生明显的改善，从而导致条件接近恢复后的10-15年内已建立的较早的缓冲带。

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