Liu, Zhongling

Xiao, Honglang

Yang, Huimin

Zhao, Liang

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Influence of Different Sampling Strategies on the Relationship of Biodiversity and Grassland Primary Production Liang Zhao Chinese Academy of Sciences, China Huimin Yang Lanzhou University, China Zhongling Liu Chinese Academy of Sciences, China Honglang Xiao Inner Mongolia University, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/1-6/10 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅰ 　 瞯 ]259　 瞯Grasslands/Rangelands Resources and Ecology ——— Ecology of Grasslands/RangelandsInfluence of different sampling strategies on the relationship of biodiversity and grasslandprimary productionL iang Zhao１ , H uimin Y ang２ ,Zhongling L iu３ , Honglang X iao１ ＊１ Cold and A rid Regions Env ironmental and Engineering Research Institute , CA S , L anz hou ７３００００ ,China ;２ College o f Pastoral A griculture Science and Technology , L anz hou University , L anz hou ７３００２０ ,China ;３ Inner Mongolia University , H uhhot ０１００２１ ,China ;倡 Corresponding author . E‐mail : z haol＠ lz u .edu .cnKey words : sampling strategy , species richness , species evenness , production , phenological separationIntroduction The relationship between biodiversity and ecosystems function ( primary production shown in most studies) is a keyissue for ecologists . The maximum community biomass in August was used as production in almost all studies . Someresearchers suggested that a multi‐harvest sampling strategy may be better in grassland communities ( Hooper and Dukes ,２００４ ) . A three‐year study was conducted in a natural grassland community to test the influence of the sampling strategy on therelationship between biodiversity and grassland primary production .Materials and methods Three plots were selected , and fenced in different years . From May to September , all live grass wasclipped every two weeks for three years . The maximum biomasses for each species during the growing season were summed asthe total annual primary production ( TANPP) , while the maximum biomass of the community in lateAugust was indicatedBmax . Both species richness ( S) and independent species evenness ( E) were used as diversity indices .Results and discussion Species richness had a positive relationship with both TANPP and Bmax in all three years . Speciesevenness had a positive relationship with TANPP in all three years while it had a negative relationship or non correlation withBmax . These results showed that complementary effect and sampling effect were confused with different sampling strategies( Mulder et al . , ２００４ ) . This may suggest that phenological separation is an important factor for interpreting the relationshipbetween diversity and production in seasonal grassland communities .Acknowledgement This work was supported by Chinese Academy of Sciences Action‐Plan for West Development ( KZCX２‐XB２‐０４) .ReferencesHooper , D .U . , Dukes , J .S . , ( ２００４ ) . Overyielding among plant functional groups in a long‐term experiment . EcologyLetters ７ , ９５‐１０５ .Mulder , C .P .H . , Bazeley‐Whiter , P .G . , Dimitrakopoulos , A , Hector , M . Scherer‐Lorenzen . Schmind , B . , ( ２００４ ) .Species evenness and p roduction in ex perimental p lant communities . Oikos １０７ , ５０‐６３ .spearman'rho=0.884 spearman'rho=0.500 700 P,<0.01 700 p<0.01 600 600 .. § 500 . . 500 0.. 0.. 400 400 z ~ . . 300 300 . . .. .. 200 200 10 12 14 16 18 20 22 24 26 28 30 32 34 36 0.20 0.25 0.30 0.35 0.40 0.45 0.50 350 spearman'rho=0.531 350 spearman'rho=-0.429 300 p<0.,01 300 p<0.05 250 250 01 -~ 200 200 E al 150 I . 150 .• 100 100 6 8 10 12 14 16 18 20 0.2 0.3 0.4 0.5 0.6 0.7 s E 

Influence of Different Sampling Strategies on the Relationship of Biodiversity and Grassland Primary Production

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Influence of Different Sampling Strategies on the Relationship of Biodiversity and Grassland Primary Production

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