Advances in Earth Science ›› 2008, Vol. 23 ›› Issue (9): 974-981. doi: 10.11867/j.issn.1001-8166.2008.09.0974

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Changes in Eco-chemical Properties of a Mangrove Wetland under Spartina Invasion from Zhangjiangkou, Fujian, China

Zhang Xianglin 1,2,Shi Shengli 1,2,Pan Genxing 1,Li Lianqing 1,Zhang Xuhui 1,Li Zhipeng 1   

  1. 1.Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 2100095,China;2. College of Aquatic Production, Jimei University, Xiamen 361021,China
  • Received:2008-02-19 Revised:2008-06-21 Online:2008-09-10 Published:2008-09-10

Zhang Xianglin,Shi Shengli,Pan Genxing,Li Lianqing,Zhang Xuhui,Li Zhipen. Changes in Eco-chemical Properties of a Mangrove Wetland under Spartina Invasion from Zhangjiangkou, Fujian, China[J]. Advances in Earth Science, 2008, 23(9): 974-981.

Soil samples at different depth intervals were collected under 4 plant communities with different stages of vegetation decline from mangrove due to Spartina grass invasion of a beech wetland from Lingxiao county, Fujiang Province. Soil properties of total and available C, N, P, microbial biomass C and N, and enzyme activities were determined. Prominent differences in all the soil properties were observed between the plant communities at different succession stages. At a certain depth, the change of soil organic carbon(SOC), total N and P, cation exchange capacity (CEC) and microbial biomass C and N (SMBC and SMBN) of soil from a plant community followed in a order as: mangrove> mangrove mixed with grass> pure grass > bare beach. The changes in soil enzyme activites also followed in such a trend. Meanwhile, these key values of soil and ecological property declined with depth in different magnitudes. Invasion of Spartina grass has induced significant decline of the soil ecological properties of the wetlands. Comparative study of the magnitudes of the changes of the different eco-chemical properties revealed a higher sensitivity of SOC, microbial C and N, activities of phosphorase and invetase to wetland ecosystem degradation under Spartina grass invasion. These parameters were suggested as bio-indicators for the wetland ecosystem health.

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