| Autor: |
Levings CD; Center for Aquaculture and Environmental Research, Fisheries and Oceans Canada, West Vancouver, BC, Canada V7V 1N6. levingsc@pac.dfo-mpo.gc.ca, Varela DE, Mehlenbacher NM, Barry KL, Piercey GE, Guo M, Harrison PJ |
| Jazyk: |
angličtina |
| Zdroj: |
Marine pollution bulletin [Mar Pollut Bull] 2005 Dec; Vol. 50 (12), pp. 1585-94. Date of Electronic Publication: 2005 Jul 20. |
| DOI: |
10.1016/j.marpolbul.2005.06.032 |
| Abstrakt: |
We investigated the effect of acid mine drainage (AMD) from an abandoned copper mine at Britannia Beach (Howe Sound, BC, Canada) on primary productivity and chlorophyll a levels in the receiving waters of Howe Sound before, during, and after freshet from the Squamish River. Elevated concentrations of copper (integrated average through the water column >0.050 mgl(-1)) in nearshore waters indicated that under some conditions a small gyre near the mouth of Britannia Creek may have retained the AMD from Britannia Creek and from a 30-m deep water outfall close to shore. Regression and correlation analyses indicated that copper negatively affected primary productivity during April (pre-freshet) and November (post-freshet). Negative effects of copper on primary productivity were not supported statistically for July (freshet), possibly because of additional effects such as turbidity from the Squamish River. Depth-integrated average and surface chlorophyll a were correlated to copper concentrations in April. During this short study we demonstrated that copper concentrations from the AMD discharge can negatively affect both primary productivity and the standing stock of primary producers in Howe Sound. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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