中国中、东部典型县域土壤与地表水体多样性的粒度效应及关联性
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国家自然科学基金项目(41171177)资助


Effect of grain size on and correlation analysis of pedodiversity and surface water body diversity in counties typical of Central and East China
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    摘要:

    选取河南省和江苏省的6个典型县域作为研究区,在1 km×1 km网格尺度下采用空间粒度方法研究优势土属(DSF)和稀有土属(RSF)的土壤多样性值、3个研究时期空间分布面积指数(MSHDAI)和空间分布长度指数(MSHDLI)的粒度响应类型和4个指数间的关联性和相关关系的粒度响应及稳定性。结果表明:土壤DSF和RSF多样性值对空间粒度的响应基本上属于“无响应型”,且RSF空间位置位于研究区边缘时随着粒度的增大而影响土壤多样性的稳定性;地表水体多样性MSHDAI和MSHDLI指数对粒度的响应均属于“下降型”,二者间及二者平均值间的尺度效应关系为多项式函数时,拟合度最高;2000—2013年间,襄城县和吴江区土壤和地表水体多样性间的相关性类型为稳定型,二者相关关系的粒度效应有显著正、负相关两种,且相关性均未发生本质性变化,具有一定的稳定性。林县、固始县和溧水县为不稳定型,如皋市由于水网密度过大未表现出相关性。由此可知,研究区的地形、水体形态和密度及人类活动干扰等是影响土壤和地表水体多样性关系的主要因素。

    Abstract:

    Six counties, typical of Henan and Jiangsu are selected in a case study on application of the spatial grain size method on a 1 km×1 km grid scale to exploration of soil diversity of dominant and rare soil families (DSF and RSF), type of grain size effects on MSHDAI and MSHDLI, and grain size effects on correlativity and correlations between the four indices and their stabilities. In terms of soil diversity, soil families, the highest in diversity index and in soil patch area as well are deemed as dominant ones. Counties dominated with plains in terrain are the lowest in number of soil families, while those dominated with hills are the highest. For instance, in Rugao County, the water network, being too high in density, plays a unique role in the study on correlativity between pedodiversity and surface water body diversity. With rising spatial grain size, the grain size effects on both DSF and of RSF fall basically into the type of "non-responsive", suggesting that the two indices are not sensitive to changes in spatial grain size, or that they are relatively stable. However, when RSF is located at the edge of the study area, soil patches change in shape with grain size, which in turn affects stability of the pedodiversity. In the research of surface water body diversity, the effects of grain size on MSHDAI and MSHDLI are both of the "declining type". In the study areas, regardless of research period, the relationships in terms of scale effect between MSHDLI and MSHDAI and between their means are all polynomial functions, which indicates that as time goes on, changes of the water bodies in either area or shape do not affect the fitted functional relationship between the two indices. With rising spatial grain size, the correlations between pedodiversity and the surface water body diversity exist in two types, “stable type” (including unchanged significant positive correlationship, unchanged significant negative correlationship and unchanged non-existence of significant correlationship) and “unstable type”. To sum up, of the six counties under study, Xiangcheng of Henan and Wujiang of Jiangsu are the most stable ones, which is attributed to their plain-dominated terrains, while Linzhou and Gushi of Henan and Lishui of Jiangsu are unstable ones, which is attributed to their hill-dominated terrain. Rugao, owing to its high water network density does not show any correlation between pedodiversity and surface water body diversity. It should be pointed out that the distribution of planar lakes in the southwest of Lishui is contributing to a certain extent, to the instability of the correlation, which might be associated with the setting of width and diversity index of lakes. So more efforts should be made in futuring research in this field. The study on effects of grain size on correlation coefficient of related indices in Xiangcheng and Wujiang reveals that in Xiangcheng exists a significant positive correlation between RSF with MSHDAI, and a significant negative one between DSF and MSHDAI and between DSF and MSHDLI, whereas in Wujiang exist significant positive correlations between DSF and MSHDAI and between DSF and MSHDLI. The correlation curve of the correlation coefficients of the two counties remains essentially unchanged, which shows that the soils and surface water bodies are well correlated in the two counties, regardless of regions. Results show that for the effects of grain size of the dominant soil family and rare soil family are basically of the type of "non-responsive", and with rising grain size, the RSF located at the edge of the study area, declines in stability of pedodiversity; The effects of grain size on MSHDLI and MSHDAI are of the type of “Decining”, and when the relationship between the two or their means in scale effect fits the polynomial function, the fitting peaks in degree. During 2000 ~ 2013, the correlations between the indices of pedodiversity and the surface water body diversity in Xiangcheng and Wujiang were of the “Stable type” encompassing both positive and negative ones and never underwent any substantial changes, so they were quite stable while the correlations in Linzhou, Gushi and Lishui were so stable and that in Rugao was almost nil due to its highly dense water network. Therefore, it is quite clear that terrain, shape and density of the water bodies and human activities are the major factors affecting the correlationship between pedodiversity and surface water body diversity.

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任圆圆,张学雷.中国中、东部典型县域土壤与地表水体多样性的粒度效应及关联性[J].土壤学报,2015,52(6):1237-1250. DOI:10.11766/trxb201412230667 Ren Yuanyuan, Zhang Xuelei. Effect of grain size on and correlation analysis of pedodiversity and surface water body diversity in counties typical of Central and East China[J]. Acta Pedologica Sinica,2015,52(6):1237-1250.

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  • 收稿日期:2014-12-23
  • 最后修改日期:2015-06-01
  • 录用日期:2015-08-17
  • 在线发布日期: 2015-08-31
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