Relationships between metals and hyporheic invertebrate community structure in a river recovering from metals contamination

摘要: Biota and chemistry from hyporheic samplers were used to describe environmental changes, after treatment of mine drainage, in the shallow zone upper Arkansas River, Colorado, U.S.A. Samples collected (1992–1997) above below drainage source, further downstream where a historically cleaner tributary enters system. Hyporheic metal concentrations high during spring runoff at impacted site even initiation treatment, but declined several years. Correspondence analysis increased invertebrate taxa richness suggested that macroinvertebrates recovering previously site. Differences substrate between sites water flows 1995 also appeared affect communities. High abundance, unique those found surface, metals suggests sampling this is important for monitoring recovery polluted streams.