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The Timeperal-spatial Variation of Zoobenthos and Its Functional Groups in Yellow River Delta Wetlands

Author: LiuLiJie
Tutor: LiChuanRong；XuJingWei
School: Shandong Agricultural University
Course: Forest cultivation
Keywords: Of macrobenthos Yellow River Delta wetland Plant communities Diversity Environmental factors Trophic functional groups
CLC: Q958.8
Type: Master's thesis
Year: 2010
Downloads: 107
Quote: 1
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Abstract

The macrobenthos animals play an important role in the transformation process of the matter and energy of the wetland ecosystem. Related research, however, there is only focused on the level of the species cataloged distribution and change laws to improve the composition and structure of the Yellow River Delta wetland ecosystem reveal macrobenthos in time and space, respectively, in the spring of 2006, the summer and in the summer of 2008, in the Yellow River the typical delta wetlands ecosystem, homemade 0.1m ~ 3 boxes Borrow take soil samples, investigation and monitoring of macrobenthic animals, including species composition, diversity, spatial and temporal distribution and environmental factors on this basis of macrobenthic functional groups divided. The results are as follows: (1) of macrobenthos space distribution of horizontal space by the estuary extends inland process, the mollusk species gradually reduced and more than 80% of distribution tide flat; the annelids performance for aquatic plant communities gt; Plant Community gt; xeric plant communities; arthropod crustaceans Insecta animal transition Macrobenthic Communities species, biomass, diversity index showed aquatic plant communities gt; Plant Community gt; xeric plant communities, evenness and richness index performance for students plant communities gt; aquatic plant communities gt; xeric plant communities. Vertical space, 95% of the species and the individual are distributed within the range of 0 ~ 20cm soil, and surface gathering is very obvious. (2) the macrobenthos in time distribution of macrobenthos in late spring, little change in the end of the summer species, the different seasons habitats of macrobenthos biomass changes showed for the reed to gt; farmland cotton gt; intertidal zone (low tide Beach,, and climax Beach) gt; shelterbelts (Robinia pseudoacacia, Ash forest and poplar forest) gt; grass; on the whole of macrobenthos biomass was significantly higher than in summer in spring. (3) macrobenthic functional groups divided into 41 kinds of macrobenthos herbivores 14 representative species of the advantages of functional groups, large gray weevil; planktophagous the smooth river Basket clams as the representative species; six kinds of meat eaters, aibuhitensis as representative species; detritus eater six kinds, Zhili Pheretima for representative species; omnivores, as the representative of Japan dark brown ant species. Estuary extends inland from the spatial distribution of plankton eaters are mainly distributed in the aquatic plant communities, herbivores are mainly distributed in the plant communities of high school students. On the time of the distribution, composition and species diversity differences of macrobenthic functional groups of the various habitats in different seasons is not reed biggest difference, the two kinds of spring detrital food, summer disappears. (4) analysis of macrobenthos relationship with environmental factors in the soil physical and chemical factors in the water content of macrobenthos maximum correlation, in addition to the types of outside reached a significant level above; soil salinity of macrobenthos richness than soil inorganic carbon macrobenthic species significant positive correlation, and water-soluble organic carbon and biomass, soil available nitrogen species highly significant negative correlation, available K and richness index was significantly negatively correlated with available phosphorus and evenness index highly significant correlation. (5) Macrobenthic Communities similarity of the Yellow River Delta wetland the macrobenthos in environmental factors clustering analysis of macrobenthos community similarity analysis found that the higher the similarity of the living environment more similar plant communities of macrobenthos community similarity between woodland and farmland, the lower of the remaining habitat.

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