Investigation Of Entironmental Status And The Countermeasure For Ecological Restoration Of The West Section Of Xixi Wetland

Wetland is the idiographic and important ecosystem on the surface layer of earth,it get along with other ecosystem,such as forest,lawn,farmland and ocean ,to hold together the diversity of biology and the balance of zoology, which function is too particularly to replaceable. Wetland is provided with concernful economic function,which offer output of propagation and water resource to people,is one of the support system of human servive, and that wetland also have powerful service function of ecosystem,for instance accommodate niagara,depurate water quality, maintain biologic diversity and so on. There are 14 terms function of wetland which are listed by Wetland Internation.XiXi wetland is the most important city wetland in Hangzhou and the precious resource of zoology and civilization. The other analogous city wetland is a fat lot in other city in China and world.In these latter days, Xixi wetland was suffer from the serious invade and occupy come from the city consturct and empolder,due to frequently intervention of human. At the same time, the entironment of wetland was fall under demolish,along with the population increase and the expand of manufacture activity of the denizen who inside the wetland, the fast empolder of nearby zone, was menace fearfully to the zoology and circumstance of the wetland. The visga of physical geography of Xixi wetland has took a huge variance, the intrinsic circulate system of natural and false marsh was suffer demolish, hodiernal ecosysem is incapable recurrence effectually. It is stares in the face to resume its wetland ecosystem by consult the correlative archaic literature and handle the study production of modern ecology,biology, geology and climatology.This paper through investigated the quality of the surface water,atmosphere and the voice,as well as the botanic resource and the hydrophytic biologic resource,to analysed the problem of the entironment and the ecosystem of Xixi wetland, accordingly provided basic material and advice to the zoology rehab. The mostly investigate reult as follows:(一) The investigate result of Xixi wetland's entironment1. The quality of the surface water The pollute of the water area is comparatively graveness at the present time as a result of the infuence by the person's live,agriculture,industry and ship of this area as well the upriver and the downriver. The inspect result of water quality indicated that each site also had some index which were go beyond the kind v standard of GB3838-2002,these item were mostly concentrate at AN,P and N.The water quality of QiuXueAn and ChaoTianMoGang were preferably. The water quality of this area was worse than the kind V water.2. The quality of environmental atmosphere The quality of this area environmental atmosphere was fine collectivitily. The inspect result indicated that the daily concentration of SO₂ ranged from 0.029 mg/m3 to 0.041 mg/m3,the daily concentration of NO2 ranged from 0.051 mg/m3 to 0.080 mg/m3,these item all tally with the first kind atandard of GB3095-1996.The daily concentration of TSP ranged from 0.319 mg/m3 to 1.007 mg/m3,which wre go beyond the stantard,due to the influence by the dust of the city and this area.3. The quality of environmental voice The quality of this area environmental voice was fine collectivitily. The other spot could within touch the stantard of esch functional section in the GB3096-93,get rid of some spot which Ld and Ln got beyond the stantard due to more vehicle and construction.(二) The investigate result of Xixi wetland's zoology1. The botanic resource It is first published that there are 254 species of vascular plants of Xixi wetland, which belong to204 genera and 91 families . Among them there are about 8 families, 9 genera, 9 species in Pteridophyta. 67 families, 146genera, 184 species in Dicotyledoneae and 12 families, 43 genera, 54 species in Monocoty-hadoneae. There are various geographical elements among genera, in which the tropic elements take dominant position and make account for 47.5%. This phenomenon is the result of the broad Iatitudes and diversified habitats in Hangzhoui. Cosmopolitan elements has 35 genera. The elements accounts 17.2% in total genera, and is main components or key genera in wetland vegetation. Endemic of China is scarcein theflora2. The hydrophytic biologic resource There were pelagian alga about 5 phylum 39 genus,include 16 genus of Chlorophyta, which took apart in 41.1%; 12 genus of Bacillariophyta ,which took apart in 30.8%; 6 genus of Euglenophyta, which took apart in 15.4%; 3 genus of Chrysophyta,which took apart in 7.8%; 2 genus of Cyanophyta, which took apart in 5.1%. There were 31 genus of zooplankton, include 9 genus of Protozoa, 13 genus of Rotifera, 6 genus of Cladocera and 3 genus of Copepoda.