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[1]SUN Fei-da,LONG Rui-jun,GAN You-min.Effects of Plateau Pikas (Ochotona curzoniae) Activities on Plant Biomass Seasonal Distribution of Alpine Meadow Population[J].Research of Soil and Water Conservation,2010,17(02):204-207,211.

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Effects of Plateau Pikas (Ochotona curzoniae) Activities on Plant Biomass Seasonal Distribution of Alpine Meadow Population

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 02 Page number: 204-207,211 Column: Public date: 2010-04-20

Title:: Effects of Plateau Pikas (Ochotona curzoniae) Activities on Plant Biomass Seasonal Distribution of Alpine Meadow Population

Author(s):: SUN Fei-da¹, LONG Rui-jun², GAN You-min¹; 1. Department of Grassland Science, Sichuan Agricultural University, Ya’an, Sichuan 625014, China;
2. International Center for Tibetan Plateau Ecosystem Management, Lanzhou 730020, China

Keywords:: Plateau pikas(Ochotona curzoniae); burrowing rodents densities; alpine meadow; plant biomass; seasonal distribution

CLC:: Q948.1

DOI:: -

Abstract:: Fourty plateau pikas (Ochotona curzoniae) activities plots and four typical plots were investigated to find out the relationship between pikas effective burrows densities and plant biomass seasonal distribution of alpine meadow population. The results showed that the different burrows densities and every biomass indexes were satisfied with quadratic equation. To aboveground biomass index, burrows in MDP with 512 holes/hm², the biomass declined to the minimum. Overall the aboveground biomass changed to single-peak curve with seasonal variation. The maximum biomass with different extent of pikas activities appeared in August which was ahead of AZDP reaching this spot in September. Biomass in July was nearly closed to the annual average, so it could be used as the important basis for evaluating whole annual hay reserves. To belowground biomass, the minimum appeared at the end of August. Of four plots MDP was the least and the AZDP was the most. Total biomass was dominated mainly by belowground root composition and showed the same trend. In summary, aboveground biomass was more sensitive to piksa activities and growing season than belowground roots. Plateau pikas activities had no significant effects on the belowground biomass formation and the quantity in the short term.

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