生態(tài)系統(tǒng)結(jié)構(gòu),、功能和穩(wěn)定性是近20年生態(tài)學(xué)和環(huán)境科學(xué)研究的焦點(diǎn)?；瘜W(xué)計(jì)量內(nèi)穩(wěn)性（環(huán)境或者食物中的養(yǎng)分組成發(fā)生變化而生物體維持相應(yīng)的元素相對不變的一種能力）是生物在長期的進(jìn)化過程中,，適應(yīng)環(huán)境變化的結(jié)果，是生理和生化調(diào)節(jié)的反映,。但是,，化學(xué)計(jì)量內(nèi)穩(wěn)性與生態(tài)系統(tǒng)特性的關(guān)系還未見報(bào)道。
中科院植物研究所韓興國研究組在內(nèi)蒙古錫林郭勒草原生態(tài)系統(tǒng)國家野外科學(xué)觀測研究站（簡稱草原站）進(jìn)行了2年的氮磷添加實(shí)驗(yàn),，結(jié)合一個(gè)1200公里的樣地實(shí)驗(yàn)和草原站27年的長期監(jiān)測實(shí)驗(yàn),，從時(shí)間和空間尺度充分證明，內(nèi)穩(wěn)性高的物種具有較高的優(yōu)勢度和穩(wěn)定性,，內(nèi)穩(wěn)性高的生態(tài)系統(tǒng)具有較高的生產(chǎn)力和穩(wěn)定性,。研究結(jié)果表明，通過調(diào)節(jié)生物對環(huán)境因子的響應(yīng),，化學(xué)計(jì)量內(nèi)穩(wěn)性成為生態(tài)系統(tǒng)結(jié)構(gòu),、功能和穩(wěn)定性維持的重要機(jī)理，在生態(tài)系統(tǒng)的相關(guān)研究中，應(yīng)該充分考慮化學(xué)計(jì)量內(nèi)穩(wěn)性的作用,。
該研究結(jié)果還可以為自然保護(hù)區(qū)的管理提供依據(jù),，研究人員建議，在自然保護(hù)區(qū)管理過程中,，除了重視生物多樣性的保護(hù),，更要重點(diǎn)保護(hù)那些內(nèi)穩(wěn)性高的“關(guān)鍵種”，因?yàn)檫@些物種對實(shí)現(xiàn)生態(tài)系統(tǒng)的功能,、保持生態(tài)系統(tǒng)穩(wěn)定有更加重要的作用,。
該項(xiàng)研究也是關(guān)于化學(xué)計(jì)量內(nèi)穩(wěn)性與生態(tài)系統(tǒng)結(jié)構(gòu)、功能和穩(wěn)定性的關(guān)系的首次研究,，拓展了生態(tài)化學(xué)計(jì)量學(xué)研究的范疇,。（生物谷Bioon.com）
生物谷推薦英文摘要：
Ecology Letters DOI: 10.1111/j.1461-0248.2010.01532.x
Linking stoichiometric homoeostasis with ecosystem structure, functioning and stability
Qiang Yu1,2,3, Quansheng Chen1, James J. Elser4, Nianpeng He1, Honghui Wu1,2, Guangming Zhang1, Jianguo Wu4,5, Yongfei Bai1, Xingguo Han1,3,*
Ecosystem structure, functioning and stability have been a focus of ecological and environmental sciences during the past two decades. The mechanisms underlying their relationship, however, are not well understood. Based on comprehensive studies in Inner Mongolia grassland, here we show that species-level stoichiometric homoeostasis was consistently positively correlated with dominance and stability on both 2-year and 27-year temporal scales and across a 1200-km spatial transect. At the community level, stoichiometric homoeostasis was also positively correlated with ecosystem function and stability in most cases. Thus, homoeostatic species tend to have high and stable biomass; and ecosystems dominated by more homoeostatic species have higher productivity and greater stability. By modulating organism responses to key environmental drivers, stoichiometric homoeostasis appears to be a major mechanism responsible for the structure, functioning and stability of grassland ecosystems.
