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1.
Dynamics and relationships of Ca, Mg, Fe in litter, soil fauna and soil in Pinus koraiensis-broadleaf mixed forest 总被引：1，自引：0，他引：1
The Liangshui Natural Reserve in Heilongjiang Province of China was selected as the study area. The authors collected the samples of forest litter （Tilia amurensis, Fraxinus mandshurica, Pinus koraiensis, Acer mono, Betula costata, and mixed litter）, soil in humus horizon （0--5cm） and soil horizon （5-20cm）, and soil macrofauna （Oligochaeta, Geophiloporpha and Juliformia） from 2001 to 2002. The role of soil macrofauna in the material cycle was analyzed through comparing the macro-element contents among various parts of the subsystems and using enrichment index （El）. The results indicate that dynamic changes of various litters are very complicated. The contents of Fe in each kind of litter increase firstly, and then decrease in the study period. The changes of macro-element contents are greater in the broad-leaf litter than in the coniferous litter, and the mixed litter is in the middle level, but the differences among them are not significant. The contents of Mg and Fe in humus are higher than those in soil, but the contents of Ca in soil are higher than that in humus. The dynamic changes of macro-element contents in soil and soil fauna are not consistent with those in litter. The diplopod presented obvious enrichment of Ca and Mg （E1〉1）, but it does not significantly enrich Fe. Earthworm has a stronger enrichment ability of Fe than diplopod and scolopendra, but E1〈1. Soil fauna can make great influences on the material cycle of the subsystems. 相似文献
2.
Dynamics and Relationships of Ca,Mg,Fe in Litter,Soil Fauna and Soil in Pinus koraiensis-Broadleaf Mixed Forest 总被引：1，自引：0，他引：1
The Liangshui Natural Reserve in Heilongjiang Province of China was selected as the study area.The authors collected the samples of forest litter (Tilia amurensis,Fraxinus mandshurica,Pinus koraiensis,Acer mono,Betula costata,and mixed litter),soil in humus horizon (0-5cm) and soil horizon (5-20cm),and soil macrofauna (Oligochaeta,Geophiloporpha and Juliformia) from 2001 to 2002.The role of soil macrofauna in the material cycle was analyzed through comparing the macro-element contents among various parts of the subsystems and using enrichment index (EI).The results indicate that dynamic changes of various litters are very complicated.The contents of Fe in each kind of litter increase firstly,and then decrease in the study period.The changes of macro-element contents are greater in the broad-leaf litter than in the coniferous litter,and the mixed litter is in the middle level,but the differences among them are not significant.The contents of Mg and Fe in humus are higher than those in soil,but the contents of Ca in soil are higher than that in humus.The dynamic changes of macro-element contents in soil and soil fauna are not consistent with those in litter.The diplopod presented obvious enrichment of Ca and Mg (EI>1),but it does not significantly enrich Fe.Earthworm has a stronger enrichment ability of Fe than diplopod and scolopendra,but EI<1.Soil fauna can make great influences on the material cycle of the subsystems. 相似文献
3.
中国海洋哺乳动物区系 总被引：7，自引：0，他引：7
本文对中国海洋哺乳动物区系进行了初步分析。已知鲸目中须鲸亚目有8种,齿鲸亚目包括淡水产的白鱀豚有23种,鳍脚目有5种,海牛目有1种,总计37种。中国海洋哺乳动物在各个目然海区按种类论,渤海最贫乏,仅有8种,南海最多有26种。大陆沿岸有30种,台湾省有26种。有些种类热带性较强,明显的代表着南部海区海洋哺乳动物的区系特征,一些来自寒海区的冷温种,代表着北部海区海洋哺乳动物的区系特征。 相似文献
4.
Benthic Macrofaunal Assemblage in the Arid Zone Mangroves of Gulf of Kachchh - Gujarat 总被引：1，自引：0，他引：1
The total benthic macrofauna consisting of 62 species in 5 groups, viz. crustaceans （18）, gastropods （17）, bivalves （16）, polychaetes （9） and fishes （2）, was recorded in western Kachchh mangroves near Gujarat. The population densities of benthic macrofauna ranged from 424 to 2393 ind.m^-2, the diversity ranged from 1.84 to 2.45 bits ind.^-1, the richness varied between 0.82 and 0.98, and the evenness varied between 0.64 and 0.81. Two maximum diversity values were recorded during winter and summer. The salinity ranged from 34 to 44, temperature varied between 17 and 37 ℃, and the acidity ranged from 7 to 8.9. 相似文献
5.
Paul COPPER 《《地质学报》英文版》2005,79(4):437-452
The Wangchengpo Frasnian section of Dushan County contains two atrypid brachiopod assemblages. The lower is characterized by the Atryparia （Costatrypa） dushanensis fauna that appears at the base of the Hejiazhai Member approximately in the falsiovalis to transitans conodont zones： the upper is characterized by the Radiatrypa yangi fauna, which appears in the Lujiazhai Member approximately correspondent with the hassi to Upper rhenana conodont zones. Atrypid brachiopods, together with other brachiopods from the Dushan section show that the Hejiazhai Member is of Frasnian age. Preliminary analyses of Frasnian atrypid brachiopods from sections of South China indicate that there are nine genera and subgenera including Atryparia （Costatrypa）, Kyrtatrypa, Spinatrypa, lsospinatrypa, Spinatrypina, lowatrypa, Desquamatia （Desquamatia）. Desquamatia （Seratrypa）, and Radiatr）pa. Atrypid species diversity did not change much through the Frasnian. On a regional scale in South China, most atrypid species went extinct prior to the Frasnian/Famennian boundary. At any specific locality or section, these atrypids became extinct about 20-40 m below the Frasnian/Famennian （F/F） boundary, within the linguiformis conodont Zone, marking this as the major extinction level. Three new atrypid species are described： Atryparia （Costatrypa） dushanensis, lowatrypa pseudobodini, and Radiatrypa yangi. 相似文献
6.
1955年11月,苏联科学院海洋研究所考察船"勇士号"在其第二十二航次从太平洋返航途中,曾穿过中国东海的北部,航向由琉球群岛的吐噶喇海峡指向济州岛,然后穿过日本海的朝鲜海峡。在此航程中设了十二个海洋观测站,在这些站上,除了其它的观测外,还获得了底部沉积物和底栖动物区系的资料。应该指出,以前中国东海北部的沉积物没有任何人进行过系统的研究,并且一切有关的资料主要是海图上的底质点。根据这些资料所编制的底质图(例如:Bottom sedimentchart of adjacent Sea of Japen,1949)具有极大的概略性,同时也不能断定海洋沉积物的 相似文献
7.
基于对中国海域海葵目700余条采集记录的分类整理和分析,对中国海域的海葵物种多样性与区系特点进行了总结。迄今共记录并核实了81个海葵目物种,其中黄渤海有29种,东海有23种,南海有55种,物种多样性呈"南海最高、黄渤海次之、东海最低"的分布格局。中国海海葵目这一分布模式既与中国大多数海洋生物类群由北向南递增的物种多样性格局不同,也不同于其所隶属的珊瑚虫纲与刺胞动物门从赤道向两极明显减少的纬度梯度分布模式,亦与全球海葵目物种多样性由南北纬30o—40o向低纬度热带海域和高纬度逐步降低的分布格局不同。本文将我国海城分布的海葵进行了区系划分并分析了各海域海葵的区系特点,探讨了驱动海葵物种多样性分布的环境因素。 相似文献
8.
山东省东平湖桡足类的初步研究 总被引：3，自引：0，他引：3
１９９４年，分别于枯水期，丰水期，平水期对东平湖桡足类群落结构进行了调查研究，同时探讨了东平湖桡足类区系结构特征。 相似文献
9.
Stephan Schaal 《东北亚地学研究》2005,8(1):9-14
The paper reports sunthetically the Cocene fauna of the Messel Pit Fossil site of Germany, in detail, including its rich taxanomic composttions, geological and paleogeographic backgroud, and the studying and applying history. 相似文献
10.