Abstract:

In April 2010, the content of chlorophyll a, primary production and their relationships with environmental factors were studied in the different portion of Weishan Lake. The results showed that average content of chlorophyll a was 6.29 μg/L; it showed that entryway portion>sea-route portion>breed portion. Average content of primary production was 188.67 mgC/(m3?d); and it showed that entryway portion>breed portion>sea-route portion. Stepwise multiple regressions were used to study the influence of environment factors to chlorophyll a and primary production, and the results showed that the Weishan Lake chlorophyll a content was significantly impacted by total nitrogen and total phosphorus; entryway portion chlorophyll a content was significantly impacted by total phosphorus. Weishan Lake primary production was significantly impacted by phosphorus content; and primary production in entryway portion was significantly impacted by total phosphorus and phosphate.