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- Title
Effects of elevated CO<sub>2</sub> concentration on the growth of submerged macrophyte Potamogeton malaianus in Taihu Lake.
- Authors
Deng Jian-cai; Zhai Shui-jing; Chen Qiao
- Abstract
An outdoor culture experiment was conducted to study the growth and nutrient con tents of submerged macrophyte Potamogeton malaianus in Taihu Lake under different CO2 concentrations. As affected by elevated CO2 concentration (1 000 μmol∙mol-1), the biomass per plant increased by 44.3% (P<0.01) , but the shoot biomass decreased by 5.5% (P<0.05). The N content in root and leaf decreased by 18.1% (P<0.05) and 6.4% (P<0.05), respectively, but that in stem was less affected (P>0.05). The P content in root, shoot, and leaf increased by 22.2% (P<0.05), 26.6% (P>0.05) and 38.8% ( P<0.05), soluble sugar content increased by 27.3%, 18.3% and 37.5% (P< 0.05), and total C content increased by 4.6%, 5.3% and 2.0%, respectively. E levated CO2 concentration decreased the N and P concentrations in water body by 7.9% and 5.1% (P<0.05), respectively, but had less effects on the N and P contents in sediment. It was suggested that elevated CO2 concentration had definite effects on the growth and habitat of submerged macrophytes.
- Subjects
CHINA; CARBON dioxide &; the environment; POTAMOGETON; PLANT biomass; PLANT growth; SUGAR; BODIES of water; LAKE ecology; ECOLOGY; LAKES
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2009, Vol 20, Issue 6, p1299
- ISSN
1001-9332
- Publication type
Article