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生態(tài)系統(tǒng)服務(wù)_熵值灰色預(yù)測法在生態(tài)環(huán)境脅迫性研究中的應(yīng)用

發(fā)布時間:2016-11-12 16:28

  本文關(guān)鍵詞:生態(tài)環(huán)境脅迫性,由筆耕文化傳播整理發(fā)布。


熵值灰色預(yù)測法在生態(tài)環(huán)境脅迫性研究中的應(yīng)用

作者:汪雪格等

來源:《安徽農(nóng)業(yè)科學(xué)》2015年第10期

摘要

以松嫩平原典型地區(qū)通榆縣為例,在構(gòu)建生態(tài)環(huán)境脅迫性評價指標(biāo)體系的基礎(chǔ)上,運用熵值- GM(1∶1)對生態(tài)環(huán)境脅迫性進(jìn)行評價和預(yù)測研究。結(jié)果表明,水資源短缺、沙漠化、鹽堿化、草地退化和人口增加是通榆縣生態(tài)環(huán)境惡化的主要脅迫因子;1994~2013年該區(qū)生態(tài)環(huán)境脅迫系數(shù)逐年增加,脅迫程度從Ⅲ級躍升到Ⅳ級。預(yù)測結(jié)果顯示,如果不采取保護(hù)生態(tài)環(huán)境的措施,脅迫系數(shù)仍會增長,脅迫程度仍會加重。針對上述情況,提出了河湖連通、水資源優(yōu)化配置、防沙治堿、改良退化草地等措施,以減輕對生態(tài)環(huán)境的脅迫,,促進(jìn)資源、環(huán)境與社會經(jīng)濟(jì)的協(xié)調(diào)發(fā)展。

關(guān)鍵詞生態(tài)環(huán)境脅迫性;脅迫系數(shù);熵值-GM(1∶1);松嫩平原;通榆縣

中圖分類號S181.3文獻(xiàn)標(biāo)識碼A文章編號0517-6611(2015)10-259-04

AbstractTaking Tongyu County as an example, based on the indicator system of

ecoenvironmental stress, using the model of the entropyGM(1∶1), the ecoenvironmental stress was evaluated and forecasted. Results showed that the short of water resources, desertification, salinization, grassland degeneration and population increase are major factors of ecoenvironment worsen in Tongyu County; stress coefficient in 1994 to 2013 were increase year by year, the stress degree jumped from III level to IV level. The forecast result showed that, if the measures doesn’t be taken to protect ecoenvironment, the coefficient still grow, the degree aggravate. In view of the above situation, this paper takes the measures to lighten ecoenvironment stress, promote the coordinated development of resources, environment, social and economy, such as water resources optimization distribution, prevention and control of desertification and salinization, improvement of degenerated grassland.

Key words Ecoenvironmental stress; Stress coefficient; Entropy- GM(1∶1); Songnen Plain; Tongyu County

隨著生態(tài)環(huán)境科學(xué)的發(fā)展,生態(tài)環(huán)境脅迫性研究已成為生態(tài)學(xué)領(lǐng)域研究的熱點。在生態(tài)學(xué)領(lǐng)域中,脅迫是生態(tài)學(xué)家從工程中借用的一個詞匯,用來表述各種不利生態(tài)因子所引起的生物體生理變化,以及種群、群落和生態(tài)層次上的生態(tài)變化,這種變化又稱為脅迫效應(yīng)[1]。脅迫一詞最早用于逆境生理學(xué)的研究中,是生物所處的不利環(huán)境的總稱[2]。Odum等認(rèn)為,脅迫是


  本文關(guān)鍵詞:生態(tài)環(huán)境脅迫性,由筆耕文化傳播整理發(fā)布。



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