Shen Ya-Qiang, Wei Hong-Bin, Cheng Wang-Da, Zhang Hong-Mei, Wang Wei-Dong, Yin Cheng-Qing
Jiaxing Academy of Agricultural Sciences, Zhejiang Province, Jiaxing 314016, China.
Huan Jing Ke Xue. 2011 Oct;32(10):2883-90.
The Shijiuyang ecological wetland for drinking water of Jiaxing City, Zhejiang Province is one of the biggest constructed wetlands for water resource protection in China. To ensure a deep understanding of the present status of the wetland vegetation of Shijiuyang ecological wetland which has been run for 2.5 years and provide support for the vegetation management of ecological wetland, systematic investigation was carried out by using plot method and quadrat method in October to November, 2010. The species composition, dynamics of plant diversity and the biomass production during operation were analyzed. Altogether 70 species belonging to 28 families and 62 genera were recorded. Among them, there were 26 wetland plants, 20 mesophytes, 14 emergent, 4 submerged, 6 floating ones. Compared with the preliminary stage, the species numbers of wetland plants increased significantly from 15 species to 70 species. The spatial pattern of riparian species diversity was examined by adopting the Simpson index and Shannon-Wiener index as species diversity indices. The results showed that the riparian species diversity was higher in the west of the Beijiaohe river (Simpson index = 0.468 3, Shannon-Wiener index = 0.835 2) than that in the south of the Dongsheng Road (Simpson index = 0.357 6, Shannon-Wiener index = 0.660 4). The analyses of quantitative characteristics of wetland vegetation showed that the plants in the root-channel purification zone in the south of the Dongsheng Road grew better than those in the west of the Beijiaohe river. With regard to the riparian vegetation, the riparian plants in the west of the Beijiaohe river were more abundant. The mean biomass production (dry weight) in the root-channel purification zone was 1.73 kg x m(-2) and the total area was 9.12 x 10(4) m2, so the total biomass production was estimated to be 157.8 t. In the same way, the mean riparian vegetation biomass production(dry weight) was 0.83 kg x m(-2) and the total vegetation area was 3.75 x 10(4) m2, so the total riparian vegetation biomass production(dry weight) was estimated as 31.1 t.
浙江省嘉兴市石臼漾饮用水源生态湿地是我国最大的人工建设的水资源保护湿地之一。为深入了解已运行2.5年的石臼漾生态湿地植被现状，并为生态湿地植被管理提供支持，于2010年10月至11月采用样地法和样方法进行了系统调查。分析了运行期间的物种组成、植物多样性动态和生物量生产情况。共记录到70种植物，隶属于28科62属。其中，湿地植物26种，中生植物20种，挺水植物14种，沉水植物4种，浮水植物6种。与初期相比，湿地植物物种数从15种显著增加到70种。采用辛普森指数和香农 - 威纳指数作为物种多样性指数，对河岸带物种多样性的空间格局进行了研究。结果表明，北郊河以西河岸带物种多样性较高（辛普森指数 = 0.468 3，香农 - 威纳指数 = 0.835 2），高于东升路以南（辛普森指数 = 0.357 6，香农 - 威纳指数 = 0.660 4）。湿地植被数量特征分析表明，东升路以南的根槽净化区植物生长状况优于北郊河以西。就河岸植被而言，北郊河以西的河岸植物更为丰富。根槽净化区平均生物量生产（干重）为1.73 kg·m⁻²，总面积为9.12×10⁴ m²，因此总生物量生产估计为157.8 t。同样，河岸植被平均生物量生产（干重）为0.83 kg·m⁻²，总植被面积为3.75×10⁴ m²，因此河岸植被总生物量生产（干重）估计为31.1 t。
