[Spatial heterogeneity of plant community species diversity in Ejina Oasis at the lower reaches of Heihe River].
Identifieur interne : 002C26 ( Main/Corpus ); précédent : 002C25; suivant : 002C27[Spatial heterogeneity of plant community species diversity in Ejina Oasis at the lower reaches of Heihe River].
Auteurs : Teng-Fei Yu ; Qi Feng ; Jian-Hua Si ; Hai-Yang Xi ; Li-Juan ChenSource :
- Ying yong sheng tai xue bao = The journal of applied ecology [ 1001-9332 ] ; 2011.
English descriptors
- KwdEn :
- MESH :
- geographic : China.
- classification : Plants.
- growth & development : Populus, Tamaricaceae.
- Biodiversity, Conservation of Natural Resources, Desert Climate, Ecosystem, Plant Development, Population Dynamics, Rivers.
Abstract
By the method of geostatistics, this paper studied the spatial heterogeneity of plant community species diversity in Ejina Oasis at the lower reaches of Heihe River. In the study area, the Margalef richness index (Ma), Simpson diversity index (Ds), Shannon diversity index (H') and Pielou evenness index (J') were in normal distribution, and the coefficient of variation (CV) ranged from 55.8% to 67.8%, suggesting a moderate variability. The Ma and H' were accorded with exponential models, and the Ds and J' were accorded with spherical models. The H' had the highest extent of spatial variation, followed by Ma, J' and Ds. Within the variable range, the structural factors in the spatial variation of Ma, Ds, H', and J' were dominant, ranging from 81.1% to 93.0%. The indices changed obviously parallel to the river, with significantly high values near Dalaihubu Town (42 degrees N, 101 degrees E), and obviously low values within the strips 100 degrees-101 degrees E and 102 degrees-102 degrees 30' E, mainly including east and west Gobi and the hinterland of Badain Jaran Desert.
PubMed: 22097354
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pubmed:22097354Le document en format XML
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<author><name sortKey="Yu, Teng Fei" sort="Yu, Teng Fei" uniqKey="Yu T" first="Teng-Fei" last="Yu">Teng-Fei Yu</name>
<affiliation><nlm:affiliation>Research School of Arid Environment & Climate Change, Lanzhou University, Lanzhou 730000, China. yutf08@lzu.cn</nlm:affiliation>
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<author><name sortKey="Feng, Qi" sort="Feng, Qi" uniqKey="Feng Q" first="Qi" last="Feng">Qi Feng</name>
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<author><name sortKey="Si, Jian Hua" sort="Si, Jian Hua" uniqKey="Si J" first="Jian-Hua" last="Si">Jian-Hua Si</name>
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<author><name sortKey="Xi, Hai Yang" sort="Xi, Hai Yang" uniqKey="Xi H" first="Hai-Yang" last="Xi">Hai-Yang Xi</name>
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<author><name sortKey="Chen, Li Juan" sort="Chen, Li Juan" uniqKey="Chen L" first="Li-Juan" last="Chen">Li-Juan Chen</name>
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<author><name sortKey="Si, Jian Hua" sort="Si, Jian Hua" uniqKey="Si J" first="Jian-Hua" last="Si">Jian-Hua Si</name>
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<author><name sortKey="Xi, Hai Yang" sort="Xi, Hai Yang" uniqKey="Xi H" first="Hai-Yang" last="Xi">Hai-Yang Xi</name>
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<author><name sortKey="Chen, Li Juan" sort="Chen, Li Juan" uniqKey="Chen L" first="Li-Juan" last="Chen">Li-Juan Chen</name>
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<series><title level="j">Ying yong sheng tai xue bao = The journal of applied ecology</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Biodiversity (MeSH)</term>
<term>China (MeSH)</term>
<term>Conservation of Natural Resources (MeSH)</term>
<term>Desert Climate (MeSH)</term>
<term>Ecosystem (MeSH)</term>
<term>Plant Development (MeSH)</term>
<term>Plants (classification)</term>
<term>Population Dynamics (MeSH)</term>
<term>Populus (growth & development)</term>
<term>Rivers (MeSH)</term>
<term>Tamaricaceae (growth & development)</term>
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<keywords scheme="MESH" type="geographic" xml:lang="en"><term>China</term>
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<keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Plants</term>
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<keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Populus</term>
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<front><div type="abstract" xml:lang="en">By the method of geostatistics, this paper studied the spatial heterogeneity of plant community species diversity in Ejina Oasis at the lower reaches of Heihe River. In the study area, the Margalef richness index (Ma), Simpson diversity index (Ds), Shannon diversity index (H') and Pielou evenness index (J') were in normal distribution, and the coefficient of variation (CV) ranged from 55.8% to 67.8%, suggesting a moderate variability. The Ma and H' were accorded with exponential models, and the Ds and J' were accorded with spherical models. The H' had the highest extent of spatial variation, followed by Ma, J' and Ds. Within the variable range, the structural factors in the spatial variation of Ma, Ds, H', and J' were dominant, ranging from 81.1% to 93.0%. The indices changed obviously parallel to the river, with significantly high values near Dalaihubu Town (42 degrees N, 101 degrees E), and obviously low values within the strips 100 degrees-101 degrees E and 102 degrees-102 degrees 30' E, mainly including east and west Gobi and the hinterland of Badain Jaran Desert.</div>
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<Abstract><AbstractText>By the method of geostatistics, this paper studied the spatial heterogeneity of plant community species diversity in Ejina Oasis at the lower reaches of Heihe River. In the study area, the Margalef richness index (Ma), Simpson diversity index (Ds), Shannon diversity index (H') and Pielou evenness index (J') were in normal distribution, and the coefficient of variation (CV) ranged from 55.8% to 67.8%, suggesting a moderate variability. The Ma and H' were accorded with exponential models, and the Ds and J' were accorded with spherical models. The H' had the highest extent of spatial variation, followed by Ma, J' and Ds. Within the variable range, the structural factors in the spatial variation of Ma, Ds, H', and J' were dominant, ranging from 81.1% to 93.0%. The indices changed obviously parallel to the river, with significantly high values near Dalaihubu Town (42 degrees N, 101 degrees E), and obviously low values within the strips 100 degrees-101 degrees E and 102 degrees-102 degrees 30' E, mainly including east and west Gobi and the hinterland of Badain Jaran Desert.</AbstractText>
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