Liu, Yan

Liu, Ying

Shi, Fengling

Wang, Xiaohong

Zhao, Bo

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Research on Community Dominance and Functional Groups after Sandy Land Enclosed Yan Liu Shenyang Agriculture University, China Fengling Shi Zhang Wu Grassland Supervision Station, China Bo Zhao Shenyang Agriculture University, China Ying Liu Shenyang Agriculture University, China Xiaohong Wang Shenyang Agriculture 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/21/1-5/22 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 ]221　 瞯Grasslands/Rangelands Resources and Ecology ——— Ecology of Grasslands/RangelandsResearch on community dominance and functional groups after Sandy Land enclosedL iu Y an１ ,Qi Feng‐L in２ ,Zhao Bo１ ,L iu Y ing １ ,W ang X iao‐Hong １１ Shen Y ang A griculture University Horticulture Institute ,１１０１６１ , E‐mail : ly０９２６２００１ ＠ １６３ .com ,２ Zhang Wu G rsslandSuperv ision Station , E‐mail :qi f englin＠ １６３ .comKey words : sandy land , enclosure , dominance ,aboveground biomass , community functional groupsIntroduction Functional groups are usally considered species which have a direct connection with system摧s function ,and thespecies among functional groups have same effect on system which have a well comparability Therefore , it is a worthy ofaffirmitive thing that we use functional groups as species diversity index to reseach the relation between species diversity andecosystem function . ( Li Qiu‐Nian ,２００４ ) The compartmentalization of functional groups can asertain every species actingcharacter and magnitude in functional groups , which administer to making certain every species摧opposite contribution toecosystem . ( Wang Zheng‐Wen ,Long Rui Jun ,２００４ ) [ ２ ] We reseach community functional groups after sandy land enclosed ,there is a important significans to making sure ecosystem natural succession and ecological restoration processes .Natural situation The test spot ( Na‐Mu‐Si‐Lai Nature Reserve) lies on northeast Zhang Wu county Liao Ning province ,and itsituated on south of Horqin sandy land .The test spot was enclosed in １９９７ .This region is temperate zone monsoon continentalclimate ,and the four seasons change distinct ,it belongs to half drought region . The mean annual temperature is ７ .１ ℃ , meanannual precipitation is ５１０ .２mm and soil type is aeolian sandy soil .Materials and metheods All kinds of plant populations摧 density , coverage , height , frequency and aboveground biomass weremensurated by random quadrat in July , ２００６ . The quadrat area was one square meter . All items were mensurated ten times .Every kind of population摧s dominance was mensurated by calculate and compartmentalizd functional groups of life form .Results The diominance calculational result indicated that the SDR of Cleistogenes squarrosa was the maximum among all kindsof populations( Table １ ) . The perennia grasses ,such as Lespedez a bicolor Turcz . , Koeleria cristata( L .) Pers . and A gropy ronmongolicum Keng also occupied important status . The SDR of annual Salsola collina put into second status . This shown thatperennial bunch grasses became the dominating population in community by nine years enclosure , the result also suggested thatthe ecologic quality of grassland has been improved a lot .The functional groups result suggested that perennial bunch grassestook on the most aboveground biomass ( ９７ .９５ g /m２ ) ( Table ２ ) among all functional groups , and this functional group waspreponderant group . Undershurbs and subshrubs were one of the main functional groups on ecological restoration andwindbreak and sand‐fixation , the proportion reached １４ .７１ percent . There were quite a bit species and quantity of annuals andbiennials in community . Moreover , the perennial rhizome grasses had the minimal contribution .Table 1 Community dominance .Species SDR Species SDRCleis togenes squar rosa ２１ �.８５ Delp hinium grandi f lo rum ５ 镲.５８Salsola collina １４ �.４９ A rtemisiasiev rs iana Willd ４ 镲.８２L es p edez a bicolor Turcz . １４ �.４６ Meliss itus ruthenica ５ 镲.００K oele r ia c r is tata( L .) Pers . １２ �.６９ Dianthus chinensis ５ 镲.１０A grop y ron mongolicum Keng １０ �.１０ Chenopodium aris tatum ４ 镲.４７A grop y ron cris tatum ９ 觋.６０ Thalictrum squar rosum S teph . ０ 镲.２０A llium senescens L . ９ 觋.３０ H emistep ta １ y rata Bunge ０ 镲.１０Ch .acuminatum Willd ９ 觋.１１ K oele r ia c r is tata ０ 镲.１０A rtemisia cap illar ies T hunb . ８ 觋.６８ L eymus chinensis ０ 镲.１０H erba Potentillae Chinensis ７ 觋.５４ B .chinensis ０ 镲.１０P .tenui f olia Willd . ６ 觋.２７Table 2 Functional group compositions o f the li f ef orms .Community functional g roupsAbovegroundbiomas( g / m２ )undershurbs and subshrubs ２６ X.７９perennial bunch grasses ９７ X.９５perennial rhizome grasses ８ 2.８６perennial forbs １４ X.００annuals and biennials ３４ X.４６Result Perennial grasses took out a dominant status ,but there were large numbers of forbs after nine years enclosure . Sandyland enclosure can redound to ecological restoration . Perennial bunch grasses became the leading functional group .ReferenceLi Qiu Nian ,２００４ . Preliminary analysis on characteristics of degraded grassland community and species diversity in alpinemeadow ecosystem . [ J] Qing H ai Env ironment ,１４(１) :３０‐３３ .

Research on Community Dominance and Functional Groups after Sandy Land Enclosed

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=2400&amp;context=igc

Research on Community Dominance and Functional Groups after Sandy Land Enclosed

Abstract

Similar works

Full text

Available Versions

University of Kentucky