ZOOPLANKTON IN A CANADIAN ARCTIC ESTUARY

摘要: Abstract Zooplankton was collected as part of a biological investigation the Eskimo Lakes and Liverpool Bay, first study its kind carried out on one major estuaries in Canadian arctic. Of 43 zooplankton species found system, copepods, polychaete cirripede larvae, rotifers were most abundant. Principal component analysis showed five geographical groups stations estuary, which dominated by character inflowing waters at both extremities, salinity water source strongest determinants composition. Essentially freshwater originating feed head system innermost stations. Marine from Beaufort Sea prevailed outermost The abundant copepods Acartia clausi, Eurytemora herdmani, Pseudocalanus sp., Limnocalanus macrurus Drepanopus bungei, occurred widely but reached maximum numbers different parts estuary. annual cycle standing stock is extreme seasonality, with biomass peaks occurring mid-summer. A mean 80 mg (wet weight) per m3 represents an especially low stock. This additional factors primary productivity phytoplankton stocks suggest oligotrophy within