Please wait a minute...
干旱区科学
  Forum 本期目录 | 过刊浏览 | 高级检索 |
Contribution of biodiversity to ecosystem functioning: a non-equilibrium thermodynamic perspective
Amit CHAKRABORTY, B Larry LI
1 Ecological Complexity and Modeling Laboratory, Department of Botany and Plant Sciences, University of California, Riverside CA 92521-0124, USA; 2 XIEG-UCR International Center for Arid Land Ecology, University of California, Riverside CA 92521, USA
Contribution of biodiversity to ecosystem functioning: a non-equilibrium thermodynamic perspective
Amit CHAKRABORTY, B Larry LI
1 Ecological Complexity and Modeling Laboratory, Department of Botany and Plant Sciences, University of California, Riverside CA 92521-0124, USA; 2 XIEG-UCR International Center for Arid Land Ecology, University of California, Riverside CA 92521, USA
下载:  PDF (94KB) 
输出:  BibTeX | EndNote (RIS)      
摘要 Ecosystem stays far from thermodynamic equilibrium. Through the interactions among biotic and abiotic components, and encompassing physical environments, ecosystem forms a dissipative structure that allows it to dissipate energy continuously and thereby remains functional over time. Biotic regulation of energy and material fluxes in and out of the ecosystem allows it to maintain a homeostatic state which corresponds to a self-organized state emerged in a non-equilibrium thermodynamic system. While the associated self-organizational processes approach to homeostatic state, entropy (a measure of irreversibility) degrades and dissipation of energy increases. We propose here that at a homeostatic state of ecosystem, biodiversity which includes both phenotypic and functional diversity, attains optimal values. As long as biodiversity remains within its optimal range, the corresponding homeostatic state is maintained. However, while embedded environmental conditions fluctuate along the gradient of accelerating changes, phenotypic diversity and functional diversity contribute inversely to the associated self-organizing processes. Furthermore, an increase or decrease in biodiversity outside of its optimal range makes the ecosystem vulnerable to transition into a different state.
服务
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章
Amit CHAKRABORTY
B Larry LI
关键词:  conservation  Important Plant Area  endemics  Altai Mountain System    
Abstract: Ecosystem stays far from thermodynamic equilibrium. Through the interactions among biotic and abiotic components, and encompassing physical environments, ecosystem forms a dissipative structure that allows it to dissipate energy continuously and thereby remains functional over time. Biotic regulation of energy and material fluxes in and out of the ecosystem allows it to maintain a homeostatic state which corresponds to a self-organized state emerged in a non-equilibrium thermodynamic system. While the associated self-organizational processes approach to homeostatic state, entropy (a measure of irreversibility) degrades and dissipation of energy increases. We propose here that at a homeostatic state of ecosystem, biodiversity which includes both phenotypic and functional diversity, attains optimal values. As long as biodiversity remains within its optimal range, the corresponding homeostatic state is maintained. However, while embedded environmental conditions fluctuate along the gradient of accelerating changes, phenotypic diversity and functional diversity contribute inversely to the associated self-organizing processes. Furthermore, an increase or decrease in biodiversity outside of its optimal range makes the ecosystem vulnerable to transition into a different state.
Key words:  conservation    Important Plant Area    endemics    Altai Mountain System
收稿日期:  2010-10-18      修回日期:  2010-10-26           出版日期:  2011-03-07      发布日期:  2011-03-07      期的出版日期:  2011-03-07
基金资助: U.S. National Science Foundation’s Biocomplexity Program (DEB-0421530); Long-Term Ecological Research Program (Sevilleta LTER, DEB-0620482)
通讯作者:  BaiLian LI    E-mail:  bai-lian.li@ucr.edu
引用本文:    
Amit CHAKRABORTY, B Larry LI. Contribution of biodiversity to ecosystem functioning: a non-equilibrium thermodynamic perspective[J]. 干旱区科学, 10.3724/SP.J.1227.2011.00071.
Amit CHAKRABORTY, B Larry LI. Contribution of biodiversity to ecosystem functioning: a non-equilibrium thermodynamic perspective. Journal of Arid Land, 2011, 3(1): 71-74.
链接本文:  
http://jal.xjegi.com/CN/10.3724/SP.J.1227.2011.00071  或          http://jal.xjegi.com/CN/Y2011/V3/I1/71
[1] YuGe ZHANG, Shan YANG, MingMing FU, JiangPing CAI, YongYong ZHANG, . Sheep manure application increases soil exchangeable base cations in a semi-arid steppe of Inner Mongolia[J]. 干旱区科学, 2015, 7(3): 361-369.
[2] JuYing JIAO, ZhiJie WANG, GuangJu ZHAO, WanZhong WANG, XingMin MU. Changes in sediment discharge in the sediment-rich region of the Yellow River from 1955 to 2010: implications for further soil erosion control[J]. 干旱区科学, 2014, 6(5): 540-549.
[3] Marina V. OLONOVA, DaoYuan ZHANG, ShiMing DUAN, LinKe YIN, BoRong PAN. Rare and endangered plant species of the Chinese Altai Mountains[J]. 干旱区科学, 2010, 2(3): 222-230.
[4] Yan LIU, DaoYuan ZHANG, HongLan YANG, MeiYing LIU, Xiang SHI. Fine-scale genetic structure of Eremosparton songoricum and implication for conservation[J]. 干旱区科学, 2010, 2(1): 26-32.
No Suggested Reading articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed