The Benthic Macro-Invertebrates and Dominant Groups Idenfication in the Yangtze Estuary
|School||East China Normal University|
|Keywords||Yangtze River estuary wetland Of macrobenthos Dominant species Evolve|
Benthic animals are an important part of the estuarine wetland ecosystem, in building ecosystem structure embodies ecosystem functions are of great significance. Yangtze estuary and the research base, relying on detailed and reliable first-hand survey data, focusing dominant species of macrobenthos ecology research. Expanded according to the needs of different research areas of macrobenthos dominant species of the Yangtze River estuary, the dominant species is divided into different types, to determine the appropriate species, to explore the ecological characteristics; summarized Yangtze estuary of macrobenthos the the type and distribution of scientific management period of estuarine macrobenthic animal resources and sustainable use to provide a scientific basis. The main findings are as follows: 1. Collate, verify, supplement and perfect the macrobenthos in List of the Yangtze River estuary. Macrobenthos in the directory containing 126 (5 species were identified to genus), attached to the 5 8 22 orders and 71 families 101 genera (excluding benthic insects). Which coelenterate species, 13 kinds of annelids, mollusks, 37 species, 73 kinds of crustaceans, echinoderms two kinds. To correct historical errors identified four kinds and more than 30 species, the addition of a new record of the Yangtze Delta. Estimates and accordingly List of macrobenthos taxonomic diversity of the Yangtze River estuary. 2. Different research needs to expand the scope of macrobenthos in the dominant species of the Yangtze River estuary, the dominant species is divided into three types of sex, to determine the appropriate type of explore its ecological characteristics. a. Defined was the dominant species throughout the estuary, the density of the dominant types Ⅰ, service resources in the Yangtze estuary macrobenthic animals. Types: intertidal zone: hard jaws beginning root Gammarus Eohaustorius cheliferus, intends marsh snail Assiminea sp. , Tan's mud crab Ilyoplax deschampsi, river clam Corbicula fluminea, pansy be the the marsh snail Assiminea violacea, no teeth mantis arm relative hand crab Chinomantes dehaani, smooth narrow-mouth screw Stenothyra glabra, of, Fei intends marsh snail Assiminea latericea, 8 kinds of; subtidal: Angle white shrimp Exopalaemon annandalei, the shrimp Palaemon Palaemon gravieri in, the beautiful white shrimp Exopalaemon modestus River clam Corbicula fluminea, narrow jaw new the mitten crab Neoeriocheir leptognatha the basket, Heilongjiang River clams Potamocorbula in upper layers in man - made inducing unevenaged multilayered broadleaved, Angle class closed tail water lice Cleantioides in annandalei, ridge tail the white shrimp Exopalaemon cariniauda at, the Macrobrachium nipponense of Japan Macrobrachium, 9 species, a total of 16 species. Through comparative analysis, from the point of view of resources, relative to the subtidal, intertidal zone is the dominant species Ⅰ more important distribution area. b. Defined in a particular community, the dominant species are the dominant species the Ⅱ, services Macrobenthic Communities in the Yangtze River estuary. Determine the type: subtidal: Angle, water lice, Closed End Cleantioides annandalei-River clam Corbicula fluminea, Exopalaemon annandalei Exopalaemon annandalei-River clams. Corbicula fluminea, the narrow jaw cashmere mitten crab Neoeriocheir leptognathus Palaemon shrimp Palaemon gravieri in, the Angle of white shrimp Exopalaemonannandalei Palaemon shrimp Palaemon gravieri in, longitudinal ribs the Nassarius Nassarius variciferus, narrow jaw mitten crab Neoeriocheir leptognathus Angle the white shrimp Exopalaemon annandalei, a red belt Nassarius Nassarius succinctus-small Siliqua Siliqua minima; the intertidal: River clams of Corbicula fluminea → Tan's mud crab Ilyoplax deschampsi → 0 River clams of Corbicula fluminea → Tan's mud crab Ilyoplax deschampsi → no teeth mantis arm phase hand crab Chinomantes dehaani the river clams of Corbicula fluminea → Tan's mud crab Ilyoplax deschampsi proposed marsh snail Assiminea sp. → toothless mantis trying to stop the relative hand the crab Chinomantes dehaani the rainbow, cherry clams Moerella, Ming iridescens → the proposed marsh snail Assiminea sp. The → the sharp cone intended to the crabs keep snails Cerithidea largillierli, hard jaws beginning of the root Gammarus Eohaustorius cheliferus → 0 → 0, Japan convolute Potter Wasps gossip of Corophium volutator River clam Corbicula fluminea → intend marsh snail Assiminea sp. The -> toothless mantis arm phase the hands crabs Chinomantes dehaani hard jaws before root Gammarus sp Eohaustorius cheliferus → contemplated the marsh snail Assiminea sp. → toothless mantis the arm relative Hand the crab Chinomantes dehaani 0 → proposed marsh snail Assiminea sp. → toothless mantis arm relative hand the crab Chinomantes dehaani, tiny snails Elachisina sp. → intend marsh snail Assiminea sp. → sharp cone intends the crabs keep Lo Cerithidea largillierli, the prop's insects Chang Lo Umbonium thomasi-hard claws before root Gammarus Eohaustorius cheliferus → 0 → 0, the river clams of Corbicula fluminea → Tan's mud crab Ilyoplax deschampsi proposed marsh snail Assiminea sp. → 0, Green dragonfly Glauconome chinensis → the the proposed marsh snail Assiminea sp. → the sharp cone intend crab keep snails Cerithidea largillierli, green mantis Glauconome chinensis → the proposed marsh snail Assiminea sp. → multi the tooth Wai nereis Perinereis nuntia. For the subtidal macrobenthos in terms, the salinity is the dominant factor to determine the number of species and community structure; intertidal macrobenthos in the number of species, community structure and comprehensive analysis of the environmental factors, suggesting that , environmental factors play an integrated role, there was no significant dominant factor. c. Euryhaline species as the dominant species III the defined extension estuary gradient almost the whole distribution service macrobenthos in the diffusion of the dominant species in the Yangtze River estuary, distribution and evolution of research. Types: subtidal: the narrow jaw mitten crab Neoeriocheir leptognatha; intertidal zone: Japan convolute the Potter Wasps gossip Corophium volutator the the round serrated kiss of Nereis Dentinephtys galbra and Fei intended to the marsh snail Assiminea latericea, a total of four kinds. Ecological research through the teeth of the saw kiss Nereis example, the inference that kind of estuary sandbar to land early in the process landing types, also as iconic species of estuarine areas. 3. The macrobenthic animals dominant species II Evolution of. The results showed that the shorter time scales of change - seasonal changes in animal behavior to adapt to the environment (temperature, sunlight, etc.) is based on the universal law of animal life history that formed. Longer time scales, the dominant species II are not significant changes in the estuarine intertidal zone wetlands in the climax Beach development is complete, the dominant species of each tidal zone Ⅱ formation, stability, secluded The major change; the accompanied into land process, more adapted to benthic animal (insect larvae) to move into terrestrial, a major factor in the species composition, taxonomic diversity changes will not occur over time. Human interference will be caused by the increase of the dominant species II, show that the Yangtze River estuary contains a certain number of fixed type, the adhesion of macrobenthos larvae, once they adapt to the matrix in the corresponding region of solid type, attached macrobenthos animals have the opportunity to become the dominant species II. Through time and space swap method to achieve the purpose of the dominant species of macrobenthos II evolution trend forecast newborn sandbar intertidal zone, while in fact, the process of evolution for a longer time scale process.