Present status and changes of the phytoplankton community after invasion of Neosalanx taihuensis since 1982 in a deep oligotrophic plateau lake, Lake Fuxian in the subtropical China.
Phytoplankton assemblages in the subtrophical oligotrophic Lake Fuxian, the second deepest lake in China, were investigated monthly from September 2002 to August 2003. A total of 113 species belonging to seven phyla were identified, among them, a filamentous green alga, Mougeotia sp., dominated almost throughout the study period and comprised most of the total phytoplankton biomass. Mougeotia sp. has made a substantial development during the past decades: it was absent in 1957, only occasionally present in 1983, increased substantially in 1993, and became predominant in 2002-2003. It is likely that natural invasion of the Taihu Lake noodlefish (Neosalanx taihuensis) has led to a change of dominant herbivorous zooplankton from small to large calanoid, which has increased grazing pressure on small edible algae, and thus has indirectly favored the development of the inedible filamentous Mougeotia sp.
Zhang
Xia
X
Donghu Experimental Station of Lake Ecosystems, State Key Laboratory for Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
Xie
Ping
P
Chen
Fei-Zhou
FZ
Li
Yan-Ling
YL
Li
Si-Xin
SX
Guo
Ni-Chun
NC
Qin
Jian-Hui
JH
D000818:Animals; D002681:China; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D000460:Chlorophyta / Q000254:growth & development*; D003124:Colorimetry; D017753:Ecosystem; D020387:Food Chain; D005618:Fresh Water; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000032:analysis; D036441:Osmeriformes / Q000502:physiology*; D010758:Phosphorus / Q000032:analysis; D010839:Phytoplankton / Q000254:growth & development*; D011157:Population Dynamics; D013045:Species Specificity; D013696:Temperature; D013997:Time Factors
D009566:Nitrates; D002734:Chlorophyll; D010758:Phosphorus; D000077194:Chlorophyll A