长寿湖浮游植物优势种及其影响因子

In order to explore the space-time characteristics and the environmental impact factors of phytoplankton dominant species in the Changshou Lake, the study was performed from March 2013 to February 2014 monthly at 7 sampling points. The results showed that The phytoplankton dominant species during the whole sampling period were Limnothrix sp., Komma caudate, Cryptomonas erosa , Cryptomonas marssonii, Stephanodiscus hantzschii, Merismopedia sp., Lyngbya sp., Raphidiopsis sp., Ankistrodesmus angustus, and Chlamydomonas incerta. The main dominant species in spring were Limnothrix sp., Komma caudate and Stephanodiscus hantzschii, Raphidiopsis sp., Limnothrix sp., Stephanodiscus hantzschii and Lyngbya sp. in summer, Scenedesmus bijuga, Stephanodiscus hantzschii, Komma caudate and Cryptomonas erosa in autumn, Komma caudate, Peridiniopsis niei, Lyngbya sp., Chlamydomonas incerta, Cryptomonas erosa in winter . For spatial changes, the main dominant species were Komma caudate and Stephanodiscus hantzschii in the northwest of the lake, Limnothrix sp. and Chlamydomonas incerta in the middle and eastern part of the lake. In spring, the main dominant species were significant positive correlated with and TP and a significant negative correlated with SD; In summer, the dominant species were significant positive with light intensity, and negatively correlated with DOC; the dominant species was negatively correlated with EC; the main dominant species in winter was significant positive correlated with EC, and were positive correlated with turbidity and light intensity.