Macroalgae in a spring stream in Shanxi Province:composition and relation to physical and chemical variables  

作　　者：胡变芳 谢树莲 

机构地区：[1]School of Life Science and Technology, Shanxi University

出　　处：《Chinese Journal of Oceanology and Limnology》2007年第3期317-321,共5页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Nature Science Foundation of China (No. 30470118 and 30270119);the Nature Science Foundation of Shanxi Province, China (No. 20021079).

摘　　要：Fourteen stream segments were investigated throughout the Xin’an Spring in Shanxi Province, China in 2004. The variation ranges in stream size, current velocity, discharge, dissolved oxygen, and specific conductance were large. Twenty-two macroalgae species were found in the stream. Major divisions in terms of species numbers were Chlorophyta (59.1%), Cyanophyta (22.8%), Xanthophyta (9.1%), Rhodophyta (4.5%) and Charophyta (4.5%). The most widespread species, Cladophora rivularis (50.0%), also Oedogonium sp. (42.9%) and Spirogyra sp. (42.9%) were well represented throughout the stream, whereas another 10 species were found in only one sampling site. Total percentage cover varied from <1% to 90%. Red algae Batrachospermum acuatum and the charophytes Chara vulgaris have the highest percentage cover. Among the parameters analyzed, the stream width, specific conductance and dissolved oxygen were the ones that more closely related to the species number and percentage cover of macroalgal communities. The species number of each site was negatively correlated with dissolved oxygen content. The total percentage cover of the macroalgae was negatively correlated with the stream width and the specific conductance.Fourteen stream segments were investigated throughout the Xin＇an Spring in Shanxi Province, China in 2004. The variation ranges in stream size, current velocity, discharge, dissolved oxygen, and specific conductance were large. Twenty-two macroalgae species were found in the stream. Major divisions in terms of species numbers were Chlorophyta （59.1%）, Cyanophyta （22.8%）, Xanthophyta （9.1%）, Rhodophyta （4.5%） and Charophyta （4.5%）. The most widespread species, Cladophora rivularis （50.0%）, also Oedogonium sp. （42.9%） and Spirogyra sp. （42.9%） were well represented throughout the stream, whereas another 10 species were found in only one sampling site. Total percentage cover varied from 〈1% to 90%. Red algae Batrachospermum acuatum and the charophytes Chara vulgaris have the highest percentage cover. Among the parameters analyzed, the stream width, specific conductance and dissolved oxygen were the ones that more closely related to the species number and percentage cover of macroalgal communities. The species number of each site was negatively correlated with dissolved oxygen content. The total percentage cover of the macroalgae was negatively correlated with the stream width and the specific conductance.

关 键 词：stream macroalgae COMPOSITION physical and chemical factors spring stream Xin＇an Spring SHANXI China 

分 类 号：Q933[生物学—微生物学]