A Comparative Study On Diversity And Biomass Of Phytocoenosium In Three Typical Mining Areas Of Fujian

Based on the methods of Quantitative Ecology,the diversity and biomass of three typical mining areas' phytocoenosium in Fujian have been researched,the mainly research topics including the species composition and the floristic characteristics,the quantity characteristics of dominant species,the biomass of arborescent stratum and undergrowth vegetation,species diversity features,the evaluation of eco-environmental quality and the risk coefficient of dominant species.The main results were as following:(1)The research on species composition and floristic characteristics of these three typical mining areas showed that the phytocoenosium in Xiaoban village's mining areas had 136 kinds of species in all,including 13 kinds of pteridophytas,which belonging to 9 families and 11 genus,including 2 families,2 genus and 2 species of gymnosperm,including 47 families,96 genus and 121 species of angiosperms;the phytocoenosium in Tongkeng village's mining areas had 93 kinds of species in all,including 8 kinds of pteridophytas,which belonging to 7 families and 8 genus,including 3 families,3 genus and 3 species of gymnosperm,including 41 families,70 genus and 82 species of angiosperms;the phytocoenosium in Xiping village's mining areas had 123 kinds of species in all,including 8 kinds of pteridophytas,which belonging to 4 families and 5 genus,including 2 families,2 genus and 2 species of gymnosperm,including 42 families,92 genus and 113 species of angiosperms;The areal-types of seed plants' genera of community in the Xiaoban village's mining areas had 14 kinds,including 57 tropic genus,account for 58.16%of the whole genus which cosmopolitan distribution was not included;The areal-types of seed plants' genera of community in the Tongkeng village's mining areas had 12 kinds,including 44 tropic genus,account for 61.11%of the whole genus which cosmopolitan distribution was not included;The areal-types of seed plants' genera of community in the Xiping village's mining areas had 12 kinds,including 63 tropic genus,account for 67.02%of the whole genus which cosmopolitan distribution was not included;In summary all of these three areas' floristics had tropic nature obviously.(2)The research on quantity characteristics of dominant species of these three typical mining areas showed that the main species with a relatively larger importance value in Xiaoban village's arborescent stratum were Pinus massoniana Lamb,Phyllostachys angusta,etc.The species with the largest importance value was Pinus massoniana Lamb,it's the dominant species in this community significantly;The main species with a relatively larger importance value in the Shrub Stratum were Indocalamus tessellatus,etc.The distribution of Shrub Stratum' importance value was homogeneous relatively;The main species with a relatively larger importance value in the herbaceous stratum were Dicranopteris linearis,Miscanthus floridulus,etc.The species with the largest importance value was Dicranopteris linearis,it's the dominant species in the herbaceous stratum significantly.the main species with a relatively larger importance value in Tongkeng village's arborescent stratum were Pinus massoniana Lamb,Phyllostachys angusta,etc.The species with the largest importance value was Pinus massoniana Lamb,it's the dominant species in this community significantly;The main species with a relatively larger importance value in the Shrub Stratum were Loropetalum chinens,Camellia japonica,etc.The species with the largest importance value was Loropetalum chinens,it's the dominant species in the Shrub Stratum significantly;The distribution of other species' importance value was homogeneous relatively;The main species with a relatively larger importance value in the herbaceous stratum were Dicranopteris linearis,Gahnia tristis Nees,etc.The species with the largest importance value was Dicranopteris linearis,it's the dominant species in the herbaceous stratum significantly,The distribution of other species' importance value was homogeneous relatively.The main species with a relatively larger importance value in Xiping village's arborescent stratum were Camellia oleifera Abel,Cunninghamia lanceolata,etc.The species with the largest importance value was Camellia oleifera Abel,it's the dominant species in this community significantly;The main species with a relatively larger importance value in the Shrub Stratum were Camellia oleifera Abel,Rhus chinensis,etc.The species with the largest importance value was Camellia oleifera Abel,it's the dominant species in the shrub stratum significantly;The distribution of other species' importance value was homogeneous relatively;The main species with a relatively larger importance value in the herbaceous stratum were Miscanthus floridulus,Dicranopteris linearis,etc.The species with the largest importance value was Miscanthus floridulus,it's the dominant species in the herbaceous stratum significantly,Dicranopteris linearis was the subdominant species,The distribution of other species' importance value was homogeneous relatively.(3)The research on biomass of arborescent stratum in the three typical mining areas showed that the main species with a relatively larger biomass in the Xiaoban village's mining areas were Pinus massoniana(32.811t/hm2)?Phyllostachys heterocycla cv.Pubescens(26.069t/hm2)?Cunninghamia lanceolata 19.422t/hm2),the biomass of arborescent stratum had 106.896t/hm2;The main species with a relatively larger biomass in the Tongkeng village's mining areas were Pinus massoniana(26.891t/hm2)?Cunninghamia lanceolata(23.189t/hm2)?Phyllostachys heterocycla cv.Pubescens(18.659t/hm2),the biomass of arborescent stratum had 107.617t/hm2;The main species with a relatively larger biomass in the Xiping village's mining areas were Camellia oleifera(2.422t/hm2)?Cunninghamia lanceolata(4.938t/hm2)?Pinus massoniana(4.48t/hm2),the biomass of arborescent stratum had 12.753t/hm2;The order of arborescent stratum' biomass was Tongkeng village>Xiaoban village>Xiping village.The research on biomass of undergrowth vegetation in the three typical mining areas showed that the main species' biomass of Shrub Stratum and herbaceous stratum(the species with a important value that was top 10)in the Xiaoban village's mining areas were 1150.45kg/hm2 and 221.23kg/hm2 respectively;The main species' biomass of Shrub Stratum and herbaceous stratum in the Tongkong village's mining aeras were 1326.86kg/hm2 and 259.20kg/hm2 respectively;The main species' biomass of Shrub Stratum and herbaceous stratum in the Xiping village's mining areas were 890.01kg/hm2 and 167.54kg/hm2 respectively;The order of undergrowth vegetation' biomass was Tongkeng village>Xiaoban village>Xiping village.(4)6 species diversity indexes were used to estimate the species diversity of phytocoenosium in three typical mining areas showed that the order of species diversity in Xianban village's minging aeras was shrub stratum>arborescent stratum>herbaceous stratum,the order of species diversity in Tongkeng village's minging aeras was shrub stratum>arborescent stratum>herbaceous stratum,the order of species diversity in Xiping village's minging aeras was shrub stratum>herbaceous stratum>arborescent stratum.Judging from the arborescent stratum,the order of species diversity was Tongkeng village>Xianban village>Xiping village;Judging from the shrub stratum,the order of species diversity was Xianban village>Xiping village Tongkeng village;Judging from the herbaceous stratum,the order of species diversity was Xiping village>Xianban village>Tongkeng village;the order of species diversity in total was Tongkeng village>Xianban village>Xiping village.To compare with Evergreen Broad-leaved Forests in the same climatic region,these three typical mining areas' species diversity of arborescent stratum were obviously low,especially the phytocoenosium of xiping village's mining aeras(5)The judgment of phytocoenosium's Eco-Environmental Quality in three typical mining areas showed that the eco-environment of these three mining areas were less influenced by destruction,the ecosystem structure was complete,the function is good,the regeneration ability of system was strong,the ecological problems were not notable,the disasters were not serious.The judgment of species' risk coefficient of phytocoenosium in three typical mining areas showed that the score of representative species' evaluation in Xiaoban village's mining areas was 5,the score of representative species' evaluation in Tongkeng village's mining areas was 6,the score of representative species' evaluation in Xiping village's mining areas was 6.The TN value of these three species was less than 7,belonging to the species of general class,the conservation value was relatively small.