Wetland Ecosystem Essay -- Environment, Sustainable Development

1.IntroductionWetland ecosystem is one of the most productive ecosystems on this planet delivering colossal goods and services to human society. However, due to poor awareness of their value and underestimation of their contribution, many wetlands hand over been converted to farmland or urban areas, or influenced by pollution due to agricultural and industrial activities. Consequentially wetland ecosystems have severely declined and degraded globally during the past decades. In order to vivify and protect wetlands, hence ensure a sustainable supply of wetland goods and services, it is serious to recognize their set. Vital to this is the development of military rank methods that explicitly link wetland values, the detonating device base of the ecosystem, to the design of policies (Pearce and Atkinson, 1993 Dasgupta and Mler, 2000 Arrow et al, 2004 Maler et al, 2008 Dasgupta, 2010). For a typical wetland ecosystem, its values can be accounted in terms of the populations of its species, fish harvested per day, the amount of deoxycytidine monophosphate stored per year, or the annual number of recreational visits. These are generally reason as values from wetland production, regulating or cultural services (MA, 2005). comme il faut and accurate estimation of these values enables comparative analysis of intervention practices and whence contributes to the improvement of the design of policies (Barbier, 1993 Barbier et al., 1997 Turner et al, 2000). Quality is a critical element in determining the values of wetlands. A healthy and functioning wetland may provide rich ecosystem services (Zedler and Kercher, 2005 Maltby, 2009). The quantity of the wetland valuation practice has change magnitude in relatively recent years. In the review by Heimlich et al. (1998), 33... ...s. Since the values derived with a benefit transfer method are not rigorously primary studies, we therefore deleted those items. Subsequently, the values that are not of a undivided ser vice, but a total economic value (TEV) or mark as various, had to be moved from the list for consistence. Finally, 70 selective information items from 27 articles remain in the analysis. The cross tables based on the entropy are given in plug-ins 1 and 2. Table 1 shows the blood between eco-services and wetland types in terms of the number of study cases, while Table 2 shows the relationship between the services and the methods used for their valuation. The most analyze services are food and raw materials which happen mainly at wetlands unspecified by the authors or at floodplains the most used valuation methods are the direct market pricing method, there are 41 data items out of the total 70.