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Land degradation means a loss of management options
Journal of Arid Environments ( IF 2.7 ) Pub Date : 2021-03-24 , DOI: 10.1016/j.jaridenv.2021.104502
Gabriel del Barrio , Maria E. Sanjuán , Jaime Martínez-Valderrama , Alberto Ruiz , Juan Puigdefábregas

This essay approaches land degradation by targeting its ultimate thermodynamic causes, rather than its immediate environmental consequences. The objective is to make some propositions that could help understand the essence of the process, and contribute to a theoretical framework to be developed. These propositions are: 1. Human populations are an ecosystem component, not an external driver. 2. Coupled Human and Natural Systems (CHANS) tend to increase their overall complexity over time. CHANS complexity cannot feasibly be managed. 3. CHANS are made up of two types of subsystems, a consuming Foreland (FL) consisting of the human population, and a producing Backland (BL) in its environment. 4. The FL maintains its order at the expense of simplifying the BL, which becomes an entropy sink. This is the essence of ecological degradation, which is inherent to CHANS persistence. 5. Land degradation is an ecological state, not a landscape type. Hence it should be assessed within a complete range of states of ecological maturity. 6. Land use creates degradation proportional to the simplification of the ecosystems involved. Such degradation can be defined as a decrease in exergy, and results in loss of management options. Three associated corollaries are: a) A more effective target may be to regulate rather than attempt to eliminate land degradation; b) Monitoring ecological degradation trajectories may be more effective than assessing land degradation states; c) Land degradation can be decreased by maximizing the potential for interconversion between land uses.



中文翻译:

土地退化意味着失去管理选择

本文着眼于土地退化的最终热力学原因,而不是直接的环境后果。目的是提出一些建议,以帮助理解过程的本质,并为要发展的理论框架做出贡献。这些主张是:1.人口是生态系统的组成部分,而不是外部驱动因素。2.随着时间的流逝,人与自然系统(CHANS)耦合会增加其整体复杂性。无法切实管理CHANS的复杂性。3. CHANS由两种子系统组成,一个是由人口组成的消耗性前陆(FL),另一个是其环境中的生产性Backland(BL)。4. FL维持其顺序,但以简化BL为代价,这成为了一个熵接收器。这是生态退化的本质,这是CHANS持久性所固有的。5.土地退化是一种生态状态,而不是景观类型。因此,应该在生态成熟度的完整范围内对其进行评估。6.土地利用造成的退化与所涉生态系统的简化成正比。这种降级可以定义为本能的减少,并导致管理选择权的丧失。三个相关的推论是:a)一个更有效的目标可能是规范而不是试图消除土地退化;b)监测生态退化轨迹可能比评估土地退化状况更为有效;c)通过最大程度地利用土地之间相互转换的潜力,可以减少土地退化。因此,应在生态成熟度的完整范围内进行评估。6.土地利用造成的退化与所涉生态系统的简化成正比。这种降级可以定义为本能的减少,并导致管理选择权的丧失。三个相关的推论是:a)一个更有效的目标可能是规范而不是试图消除土地退化;b)监测生态退化轨迹可能比评估土地退化状况更为有效;c)通过最大程度地利用土地之间相互转换的潜力,可以减少土地退化。因此,应该在生态成熟度的完整范围内对其进行评估。6.土地利用造成的退化与所涉生态系统的简化成正比。这种降级可以定义为本能的减少,并导致管理选择权的丧失。三个相关的推论是:a)一个更有效的目标可能是规范而不是试图消除土地退化;b)监测生态退化轨迹可能比评估土地退化状况更为有效;c)通过最大程度地利用土地之间相互转换的潜力,可以减少土地退化。并导致管理选项的丢失。三个相关的推论是:a)一个更有效的目标可能是规范而不是试图消除土地退化;b)监测生态退化轨迹可能比评估土地退化状况更为有效;c)可以通过最大程度地利用土地之间相互转换的潜力来减少土地退化。并导致管理选项的丢失。三个相关的推论是:a)一个更有效的目标可能是规范而不是试图消除土地退化;b)监测生态退化轨迹可能比评估土地退化状况更为有效;c)可以通过最大程度地利用土地之间相互转换的潜力来减少土地退化。

更新日期:2021-03-25
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