Ecosystem Function Recovery Of Artificial Mangrove In Dongzhai Harbor

In recent years, as population growth and economic development, mangrove wetlands present continuous trend of shrinking. Since the late1970s, scientists adopted a series of measures to suppress or slow down the trend of mangrove wetland degradation and loss. Current, the research on mangrove wetland restoration in the introduction of the mangrove plants try to grow and provenance selection, the nursery of mangrove reforestation and secondary forest transformation technology have made gratifying achievements. As of2010, the areas of Mangrove protected increase about360hm2in the Dongzhai Harbor. But only a simple study of mangrove species recovery is not enough, By quadrat survey, this topic has been research in population structure, spatial distribution pattern, the situation of natural regeneration, biomass and carbon storage of decades of the growth mangrove in Dongzhai Harbor protected areas in Hainan province. And by comparing the different plantations and plantations and natural forests to explore the recovery of the ecological function of the plantation, and the results are as follows:(1) In the cultivation of artificial mangrove communities in protected areas of Dongzhai Harbor, Sonneratia apetala and Sonneratia cylindria (L.) Engler are in early stages of natural regeneration, The natural regeneration of K. candel and Aegiceras corniculatum Blanco constitute the shrub layer. In addition to the major component K. candel and Aegiceras corniculatum Blanco,seedlings have Bruguiera sexangula and Acanthus ilicifolius L.. Diversity index of All levels species is the seedling layer> shrub layer> tree layer. May be due to planting density, etc. The types and quantities of the shrub layer and seedling layer are less in the artificial K. candel forest. The natural regeneration of community structure is lower than Sonneratia apetala and Sonneratia cylindria (L.) Engler community's,who are as a pioneer species. Although natural Kandelia candel forest and Bruguiera sexangula forest community is the native tree species, but due to vandalism and other reasons, The reasonable of community structure in the natural Kandelia candel and Bruguiera sexangula is differences.(2) Specimens of wood method to measure the biomass of Sonneratia apetala is91.614t/hm2, the biomass of Sonneratia cylindria (L.) Engler is85.835t/hm2, the biomass of Bruguiera sexangula is78.951t/hm2, the biomass of Kandelia candel plantation is74.305t/hm2, and the biomass of natural Kandelia candel is68.513t/hm2.And known,the tall trees of Sonneratia apetala and Sonneratia cylindria (L.) Engler community biomass is much larger than the petite trees of Kandelia candel forest and Bruguiera sexangula forest. Artificial K. candel forest reforestation time is limit, so the biomass is less than the natural Kandelia candel forest.(3) the determination of Provenance distance, the height of the beach face, the forest spacing, the number of the understory breathing root within the18-year-old artificial Sonneratia apetala and the data analysis shows, Of these factors was correlated with the understory natural regeneration native tree species, data analysis found that they meet the following relationship by SPSS:Shrubs:Y1=0.998X1+0.324X2+8.54 X3-0.122X1X3-75.953; seedlings:Y2=151.934-0.565X1-1.682X4.(4) The experimental plots within artificial valve Sonneratia apetala communities of native tree species is investigated and found that, Sonneratia apetala forest as a pioneer tree species in afforestation was the retention of the native trees seeds with the circle planted, And they can effectively resist the wash of waves on seedling, More conducive to natural regeneration and growth of understory native species.