The seasonal biomass and productivity of the submerged macrophytes in a polluted Wisconsin stream

摘要: SUMMARY 1. We measured biomass and light/dark bottle productivity of macrophytes in a Wisconsin stream throughout one growing season. Except for brief period early spring when Cladophora glomerata-filamentous algal community was dominant, Potamogeton pectinatus the dominant macrophyte species Badfish Creek. 2. Maximum 710 g DW m−2, with maximum above ground 620 m−2 below 120 m−2. Annual estimated at 1435 year−1, calculated P/B 2.01. 3. In situ net production averaged 2.83g C AFDW−1 h−1 Net positive carbon gain by P. occurred water temperatures were 15°C, daylength least 12h. This is correlated to onset tuber germination spring, point maximal decline autumn.