The Holarctic erigonid genus Zornella has been surveyed. Four species are recognized in this genus, two Palaearctic: Z.cultrigera(L.Koch,11879) & Z.orientalis sp.nov., and two Nearctic: Z.armata(Banks, 1906) &...The Holarctic erigonid genus Zornella has been surveyed. Four species are recognized in this genus, two Palaearctic: Z.cultrigera(L.Koch,11879) & Z.orientalis sp.nov., and two Nearctic: Z.armata(Banks, 1906) & Z.cryptodon Chamberlin,1920.It is demonstrated that neither nearctic species is conspecific with Z.cultrigera as was thought by Holm and other authors. Z.orientalis sp.nov. is described from northeastern Siberia. All of the species are illustrated and their distributions mapped.展开更多
The purpose of this study is to investigate total mercury （THg） distribution and its bioaccumulation up the soil-plant-grasshopperspider in the Huludao City, which is polluted seriously by chlor-alkali and zinc smel...The purpose of this study is to investigate total mercury （THg） distribution and its bioaccumulation up the soil-plant-grasshopperspider in the Huludao City, which is polluted seriously by chlor-alkali and zinc smelting industry in Northeast of China. Results indicated that average THg concentrations in soil, plant leaves, grasshopper Locusta migratoria manilensis and Acrida chinensis, and spider were 0.151, 0.119, 0.167 and 0.134 mg/kg, respectively. THg spatial distribution suggested that most of mercury came from the chlor-alkali plant and the two zinc smelteries. The highest mercury concentration was found in the wings among different grasshoppers’ organs. Although spiders are the predatory, THg concentrations in their bodies were not high, and only on the same level as in grasshoppers, which might be due to spiders’ special living habits. In the light of the mercury transportation at every stage of the soil-plant-grasshopper-spider food chain, the bioaccumulation factors were 0.03, 0.79–1.11 and 0.80–1.13 respectively. It suggested that mercury biomagnification up terrestrial food chains was not so large and obvious as it was in the aquatic food chain.展开更多
文摘The Holarctic erigonid genus Zornella has been surveyed. Four species are recognized in this genus, two Palaearctic: Z.cultrigera(L.Koch,11879) & Z.orientalis sp.nov., and two Nearctic: Z.armata(Banks, 1906) & Z.cryptodon Chamberlin,1920.It is demonstrated that neither nearctic species is conspecific with Z.cultrigera as was thought by Holm and other authors. Z.orientalis sp.nov. is described from northeastern Siberia. All of the species are illustrated and their distributions mapped.
基金supported by the National Natural Science Foundation of China(30050002)The National Science Foundation of USA through the grant "Biotic Survey of the Gaoligongshan, a Biodiversity Hotspot in Western Yunnan,China" (No. DEB - 0103795).
基金supported by the National Natural Science Foundation of China (No 40830535, 40803021)
文摘The purpose of this study is to investigate total mercury （THg） distribution and its bioaccumulation up the soil-plant-grasshopperspider in the Huludao City, which is polluted seriously by chlor-alkali and zinc smelting industry in Northeast of China. Results indicated that average THg concentrations in soil, plant leaves, grasshopper Locusta migratoria manilensis and Acrida chinensis, and spider were 0.151, 0.119, 0.167 and 0.134 mg/kg, respectively. THg spatial distribution suggested that most of mercury came from the chlor-alkali plant and the two zinc smelteries. The highest mercury concentration was found in the wings among different grasshoppers’ organs. Although spiders are the predatory, THg concentrations in their bodies were not high, and only on the same level as in grasshoppers, which might be due to spiders’ special living habits. In the light of the mercury transportation at every stage of the soil-plant-grasshopper-spider food chain, the bioaccumulation factors were 0.03, 0.79–1.11 and 0.80–1.13 respectively. It suggested that mercury biomagnification up terrestrial food chains was not so large and obvious as it was in the aquatic food chain.
