| Wetland macrophyte diversity, trophic status and phytoplankton： a case study of the cascading effects of an invasive herbivore |
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| 摘 要： | Shallow water bodies can exist in alternative stable states, a clear water state with high coverage of macrophytes or a turbid state with high phytoplankton biomass. The alternative equilibria hypothesis has been proposed to explain the occurrence of the alternative stable states (Scheffer et al., 1993)1], which assumes that: 1),
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| 关 键 词： | 湿地 植物多样性 营养状况 浮游植物 草食动物 |
Wetland macrophyte diversity,trophic status and phytoplankton:a case study of the cascading effects of an invasive herbivore |
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| Authors: | QIU Jian-Wen |
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| Institution: | Department of Biology,Hong Kong Baptist University |
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| Abstract: | Shallow water bodies can exist in alternative stable states,a clear water state with high coverage of maerophytes or a turbid state with high phytoplankton biomass.The alternative equilibria hypothesis has been proposed to explain the occurrence of the alternative stable states (Scheffer et al.,1993)1],which assumes that:1),turbidity increases with the nutrient level; 2),macrophyte reduces turbidity; and 3),macrophyte disappears when a critical turbidity is exceeded.At low nutrient levels,the water should be clear,with low phytoplanlaon biomass and extensive macrophyte coverage.At high nutrient levels,the water should be turbid,with high phytoplankton biomass and a lack of macrophytes. |
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