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Analysis of responses of typical vegetation in Nanji Wetland National Nature Reserve of Poyang Lake to water depth and submergence frequency
Time: 2019-05-15 | Hits:

Abstract: Hydrological process is the main driving factor that controls the development and succession of wetland ecological process and plays an important role in the whole process of wetland formation, development,succession and demise. Wetland vegetation communities are the significant components and mainly primary producers of wetland ecosystem. Their structures, functions and ecological characteristics comprehensively reflect the basic features of the wetland ecological environment. In this paper, taking Nanji Wetland National Nature Reserve as an example,the authors analyzed the tolerances and sensitivities of the five typical wetland vegetation communities to hydrological features using histogram and sensitivity index. The results showed that the tolerances and sensitivities of different vegetation communities to water depth and submergence frequency were different: (1) the two communities of  Phalaris and Polygonum criopolitanum had the strongest tolerance to water depth; on the contrary, the Triarrhena lutarioriparia community was the weakest; the Carex community was the most tolerant to the submergence frequency, while the Polygonum criopolitanum community was the weakest; (2) compared with submergence frequency, these five typical vegetation communities were more sensitive to water depth; and (3) Triarrhena lutarioriparia community was more sensitive to water depth and submergence frequency,while the sensitivities of Polygonum criopolitanum community to hydrologic features were the lowest.


Keywords:histogram;sensitivity index;hydrologic features;Nanji Wetland National Nature Reserve;Poyang Lake

(Journal of China Institute of Water Resources and Hydropower Research, Vol. 16, No. 6, 2018)

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