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[1]TAO Yu,WEN Zhongming,ZHU Duoju,et al.Response Relationship Between Functional Diversity/Species Diversity and Rainfall-Runoff-Sediment Yield in Loess Hilly Region[J].Research of Soil and Water Conservation,2018,25(04):120-128.

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Response Relationship Between Functional Diversity/Species Diversity and Rainfall-Runoff-Sediment Yield in Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 04 Page number: 120-128 Column: Public date: 2018-06-13

Title:: Response Relationship Between Functional Diversity/Species Diversity and Rainfall-Runoff-Sediment Yield in Loess Hilly Region

Author(s):: TAO Yu¹, WEN Zhongming², ZHU Duoju¹, ZENG Hongwen¹, ZHANG Jing²; 1. Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China

Keywords:: functional diversity; species diversity; hilly and gully region of Loess Plateau; simulated rainfall; runoff; sediment yield

CLC:: Q145⁺.2

DOI:: -

Abstract:: From the perspective of plant functional diversity and species diversity, an experiment was conducted to explore the appropriate vegetation parameters for assessing the soil and water conservation benefits of vegetation under the simulated rainfall. According to the design of the study，the experimental plots with similar vegetation coverage and different vegetation structure were selected in Zhifanggou Watershed, Ansai County. In the selected plots, we measured the traits of the dominant species including the specific leaf area, leaf tissue density, and specific root length and root tissue density. The functional richness index (FR_ic), the functional evenness index (FE_ve), the fFunctional divergence index (FR_iv), and the species diversity index were calculated. The simulated rainfall intensity was 150 mm/h and the rainfall duration was 30 min. The runoff time, total runoff and sediment yield of each plot were recorded, and the correlation between them and the community diversity index were analyzed. The results showed that: (1) the runoff duration decreased with the increase of the FR_ic; (2) among the three community functional diversity indexes, only the FR_ic showed the linear response relationship to the total runoff of the slope; (3) compared with the Simpson index, Shannon-Wiener index and Pielou index, the functional diversity index is more sensitive, which can better reflect the benefits of soil and water conservation.

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