نتایج جستجو برای: ecosystem services
تعداد نتایج: 369182 فیلتر نتایج به سال:
Evidence is accumulating that the continued provision of essential ecosystem services is vulnerable to land-use change. Yet, we lack a strong scientific basis for this vulnerability as the processes that drive ecosystem-service delivery often remain unclear. In this paper, we use plant traits to assess ecosystem-service sensitivity to land-use change in subalpine grasslands. We use a trait-base...
Assumption 1-(ii) ensures that an equilibrium in which both firms have positive demand prevails when only one of the firms offers the service (else, one firm would set a price to undercut the other and capture the entire market). Similarly, Assumption 1-(iii) ensures both firms have positive demand when both firms offer the service, and Assumption 1-(iv) ensures both firms have positive demand ...
The ecosystem services approach has been proposed as a powerful tool for the analysis of coupled social-ecological systems. This approach is particularly useful for the evaluation of cultural landscapes, which represent the joint evolution of humans and nature across an extended time span. Transhumance is a customary practice of mobile pastoralism, involving the regular seasonal migration of li...
Modern public health challenges require interdisciplinary solutions that integrate knowledge of human behavior and its complex relationship with the physical environment. Historically, this discourse was dominated by studies of hazards and other negative health consequences associated with human–environment interactions. However, growing evidence suggests that contact with green spaces (e.g., p...
The current rate of biodiversity loss threatens to disrupt greatly the functioning of ecosystems, with potentially significant consequences for humanity. The magnitude of the loss is generally measured with the use of species extinction rates, an approach that understates the severity of the problem and masks some of its most important consequences. Here, we propose a major expansion of this fo...
despite of fifteen years old legislation of environmental impact assessment (eia) in iran, investigations show that there are some kinds of shortcoming in the effectiveness and efficiency of these assessments. although some of these failures were attributed by weakness in the administrative structure, but methodological shortcomings and lack of transparency had an effective role in the these pr...
www.frontiersinecology.org © The Ecological Society of America E generate a range of goods and services important for human well-being, collectively called ecosystem services. Over the past decade, progress has been made in understanding how ecosystems provide services and how service provision translates into economic value (Daily 1997; MA 2005; NRC 2005). Yet, it has proven difficult to move ...
It has become essential in policy and decision-making circles to think about the economic benefits (in addition to moral and scientific motivations) humans derive from well-functioning ecosystems. The concept of ecosystem services has been developed to address this link between ecosystems and human welfare. Since policy decisions are often evaluated through cost-benefit assessments, an economic...
Are we cutting down tropical forests too rapidly and too extensively? If so, why? Answers to both questions are obscured in some ways by insufficient and unreliable data on the economic worth of forest ecosystem services. It is clear, however, that rapid, excessive cutting of forests can irreversibly and substantively impair ecosystem functions, thereby endangering the flow of several socially ...
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