中科院生態(tài)環(huán)境研究中心的最新研究證實(shí)，退耕還林還草是黃土高原地區(qū)生態(tài)系統(tǒng)固碳增加的主要原因，八年間黃土高原生態(tài)系統(tǒng)固碳量增加了96.1Tg（百萬噸）,。相關(guān)研究成果日前在線發(fā)布于《自然》旗下的《科學(xué)報(bào)告》。
據(jù)介紹,，生態(tài)環(huán)境研究中心傅伯杰研究組,，聯(lián)合遙感地球所吳炳方課題組，將遙感監(jiān)測(cè)和生態(tài)系統(tǒng)模型模擬相結(jié)合,，定量研究了退耕還林還草前后黃土高原地區(qū)生態(tài)系統(tǒng)固碳服務(wù)的變化規(guī)律,。研究表明：2000～2008年期間黃土高原地區(qū)生態(tài)系統(tǒng)固碳量增加了96.1 Tg（相當(dāng)于2006年全國(guó)碳排放的6.4%）。該區(qū)域生態(tài)系統(tǒng)已從碳源轉(zhuǎn)變?yōu)樘紖R,。
研究證實(shí)了退耕還林還草是該區(qū)域生態(tài)系統(tǒng)固碳增加的主要原因,，植被固碳增加的最高值出現(xiàn)在年均降水為500毫米左右的地區(qū)。
專家建議,，為使生態(tài)系統(tǒng)恢復(fù)獲得最大投入產(chǎn)出效益,，應(yīng)根據(jù)當(dāng)?shù)氐慕邓畻l件選擇適宜的植被恢復(fù)類型。(生物谷Bioon.com)
生物谷推薦的英文摘要
Scientific Reports doi:10.1038/srep02846
How ecological restoration alters ecosystem services: an analysis of carbon sequestration in China's Loess Plateau
Xiaoming Feng,Bojie Fu,Nan Lu,Yuan Zeng & Bingfang Wu
Restoring disturbed and over-exploited ecosystems is important to mitigate human pressures on natural ecosystems. China has launched an ambitious national ecosystem restoration program called Grain to Green Program (GTGP) over the last decade. By using remote sensing techniques and ecosystem modelling, we quantitatively evaluated the changes in ecosystem carbon sequestration since China's GTGP program during period of 2000–2008. It was found the NPP and NEP in this region had steadily increased after the initiative of the GTGP program, and a total of 96.1 Tg of additional carbon had been sequestered during that period. Changes in soil carbon storage were lagged behind and thus insignificant over the period, but was expected to follow in the coming decades. As a result, the Loess Plateau ecosystem had shifted from a net carbon source in 2000 to a net carbon sink in 2008. The carbon sequestration efficiency was constrained by precipitation, and appropriate choices of restoration types (trees, shrubs, and grasses) in accordance to local climate are critical for achieving the best benefit/cost efficiency.
