IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 4 - HYDRO-ENVIRONMENT : Effects of Phytoplankton Spirogyra Arcta on Growth of Submerged Macrophyte Communities
Effects of Phytoplankton Spirogyra Arcta on Growth of Submerged Macrophyte Communities
Author : Ruihua Liu and Qiuwen Chen
The existence of phytoplankton can greatly reduce the amount of light to reach submerged plants and subsequently reduce their growth. Spirogyra (Spirogyra arcta) coexists with many submerged macrophytes, but no study is conducted to exam the effects of spirogyra distributions on the growth of submerged plants or the structure of submerged plants community. In this research, control experiments that grow 4 species of submerged plants in three treatments of spirogyra cover (100% spirogyra cover, 50% spirogyra cover and 0% spirogyra cover) are carried out. The results showed that the increasing spirogyra cover significantly decreased total biomass, total number of nodes and total shoot length of the submerged macrophyte H. verticillata, E. densa and C. vulgaris, but did not affect the growth of C. demersum. The results suggest that C. demersum can tolerate shading from spirogyra, leading to an advantageous position in the light-shortage condition, while C. vulgaris has competitiveness in adequate light condition.
File Size : 96,837 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Article : THEME 4 - HYDRO-ENVIRONMENT
Date Published : 18/07/2016
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