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[1]GAO Yan,DU Feng,WANG Yannan.Relationship Between Aboveground Biomass and Species Diversity of Abandoned Community in Loess Hilly Region[J].Research of Soil and Water Conservation,2017,24(03):96-102.

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Relationship Between Aboveground Biomass and Species Diversity of Abandoned Community in Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 03 Page number: 96-102 Column: Public date: 2017-06-28

Title:: Relationship Between Aboveground Biomass and Species Diversity of Abandoned Community in Loess Hilly Region

Author(s):: GAO Yan^1,2, DU Feng^1,4, WANG Yannan³; 1. Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China;
2. University of China Academy of Sciences, Beijing 100049, China;
3. Northwest A & F University, Yangling, Shaanxi 712100, China;
4. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: species diversity; aboveground biomass; influencing mechanism; Loess Hilly Region

CLC:: Q145.2

DOI:: -

Abstract:: The study on relationship between aboveground biomass and species diversity of abandoned old-field community and its mechanism in the hilly region of the Loess Plateau is helpful for understanding community succession process and is also important for vegetation reconstruction, biodiversity protection, and ecosystem health maintenance. In this study, five typical communities were selected to investigate the monthly dynamics of aboveground biomass and its correlation with biodiversity at community scale. The results showed that: (1) the aboveground biomass of the five communities increased from May to September and the difference between different months were significant (p < 0.01); the community aboveground biomass was the highest in Bothriochloa ischaemum community (375.86 g/m²), followed by Artemisia giraldii (182.42 g/m²),Artemisia sacrorum (91.79g/m²), Artemisia scoparia (76.1 g/m²) communities, the lowest biomass was observed in Lespedeza dahurica (51.49 g/m²) community; (2) linearly positive and negative relations were found with respect to the relationships of aboveground biomass and species diversity index; in Artemisia scoparia community, aboveground biomass increased linearly with increase of species diversity index, while no relation was found in the Artemisia giraldii community; the aboveground biomass increased linearly with increase of Margalef index in Bothriochloa ischaemum and Artemisia sacrorum communities, and decreased linearly with increase of Pielou index in Bothriochloa ischaemum and Lespedeza dahurica communities. Furthermore, the influencing mechanism for the relation between aboveground biomass and biodiversity may result from occupation and utilization of blank niche, niche complementarity, interspecific interactions and competition and exclusion effect. The redundant species hypothesis perhaps resulted in the insignificant relations.

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