Economic valuation of marine ecosystem services in the Baltic Sea region has gained importance, as policy-makers are recognizing their decline and focusing on achieving good environmental status there in terms of, for example, reduced eutrophication. Parallel with this development, several initiatives have been launched, leading to a large number of economic valuation studies. However, current research indicates that neither a common approach to classifying ecosystem services nor a widely accepted methodological framework for assessing their economic value exist yet. This paper seeks to shed light on the current state of the economic valuation of ecosystem services provided by the Baltic Sea through reviewing all currently available empirical studies on the topic. The results indicate that only a few ecosystem services, including recreation and reduction of eutrophication, have been extensively monetarily valued, and still lack cross-study methodological consistency, while many other marine ecosystem services have rarely or never been valued with economic methods. The paper concludes that existing economic valuation studies provide only limited practical guidance for policy-makers intending to improve the environmental status of the Baltic Sea. There is a need for more widely shared agreement on the systematic nature of marine and coastal ecosystem services and especially on a coherent methodological framework for assessing their economic value.
In contemporary media discourse, suggestions for publicly mandated climate change mitigation or adaptation measures are frequently challenged from a cost perspective. However, empirical data on the actual economic appreciation of local mitigation and adaptation measures expressed as citizen willingness-to-pay (WTP) are scarce. In this paper, we report results of a preference survey using a choice experiment (CE) that quantifies economic preferences for biodiversitybased climate change mitigation and adaptation in the region surrounding Hainich National Park (Thuringia, Germany). A representative sample of 302 respondents -the majority of them frequent Hainich forest visitors -was interviewed in autumn 2006. Nested logit analysis showed that respondents state a substantially positive WTP for climate change mitigation by afforestation (p < 0.001). If converted to WTP for an additional sequestration of carbon that average German citizens emit as CO 2 , a monetary value of 7.34 € yr -1 t C -1 is obtained. For increasing forest resistance and resilience against insect pests and storms (climate change adaptation) a WTP of 27.54 € yr -1 (p < 0.001) is obtained, and 16.83 € yr -1 (p < 0.001) is obtained for increasing the general resilience and resistance of forest ecosystems to environmental stressors. Respondents support moderate programs to eradicate invasive plants when compared to more aggressive eradication measures. Due to the lack of comparable studies, it can only be conservatively assumed that WTP would be lower if mitigation and adaptation measures were to be implemented in forests not, or only rarely, used by respondents. As all proposed means for climate change mitigation and adaptation contribute to local forest ecosystem biodiversity, the results of the study advocate the realization of measures that potentially benefit both climate policy and regional conservation concerns.
Since first of January 2015, the EU-regulation 1143/2014 obligates all member states to conduct costbenefit analyses in preparation of control programs for invasive alien species to minimize and mitigate their impacts. In addition, with ratification of the Rio Declaration and the amended Federal Nature Conservation Act, Germany is committed to control any further spread of invasive species. This is the first cost-benefit analysis estimating positive welfare effects and societal importance of H. mantagezzianum invasion control in Germany. The paper analyses possible control options limiting stands of giant hogweeds (H. mantegazzianum) based on survey data of n = 287 German districts. We differentiate between several control options (e.g. root destruction, mechanical cutting or mowing, chemical treatment and grazing) depending on infested area size and protection status. The calculation of benefits is based on stated preference results (choice experiment; n = 282). For the cost side, we calculate two different invasion scenarios (i) no re-infestation after successfully conducted control measures (optimistic) and (ii) re-infestation twice after conducting control measures occurring within ten years (pessimistic). Minimum costs of eradication measures including a time span of ten years and a social discount rate of 1% result in a total of 3,467,640 € for optimistic scenario and 6,254,932 € for pessimistic invasion scenario, where no success of the first eradication attempt is assumed. Benefits of invasion control in Germany result in a total of 238,063,641 € per year and overassessment-factor corrected in 59,515,910 € per year.
Rangeland depletion is a persistent problem in many developing countries and is often a result of inappropriate management activities such as overstocking, particularly in the regions of West Asia and North Africa (WANA). To convert to a sustainable system of range management, programs aimed at improving rangeland condition, such as range management or livestock development plans, which are mainly based on the range succession model, have been developed and implemented by several governments. A primary objective of these programs is to maintain stocking rates at a sustainable level. However, in many cases, rangeland users’ ignorance of socioeconomic factors has caused ineffectual implementation and thus a reduction in the effectiveness of these programs overall. In this study, a survey was conducted on rangeland communities in central northern Iran where the livestock population is 15% above the proposed carrying capacity 20 years after the inception of the Range Management Plan (RMP). The focus of this study was to investigate reasons that the RMP has not been successful, from the perspective of the rangeland holders. The data were collected using open-ended interviews. The data analysis indicated that the primary barriers to the successful implementation of the RMP are quite well matched with the description of the ‘diffusion of innovations’ theory. The three characteristics of the RMP innovation, including the lack of high relative advantages, incompatible structure of the RMP with the traditional rules, and lack of observability of short-term benefits from the RMP, were realised as the main barriers to the success of the RMP adoption. An additional concern for the rangeland holders was drought, which they felt was not adequately addressed or dealt with in the RMP. Lastly, the government’s failure to fulfil the initial commitments of the RMP, for instance financial supports, has resulted in a loss of confidence of rangeland holders in the enforcement agency and governmental policies.
A growing and promising sector of precision agriculture is the site-specific application of pesticides, having a high potential for reductions in pesticide use. Within the research project ‘AssSys’, site-specific pesticide applications with a direct injection sprayer system and an automatic application assistant were evaluated economically with respect to herbicide and fungicide applications. The application assistant aims to support farmers in decision-making and implementation of site-specific pesticide applications either in the planning stage or as ex-post analysis. The economic assessment was based on field trials and scenario analysis referring to a model farm. The field trials were conducted in 2018 and 2019 in northern Germany. In the scenario analysis, two site-specific application scenarios were compared to conventional uniform treatment (100% of the field area). Weed monitoring was conducted as (1) standard procedure according to integrated pest management, (2) camera-based and (3) drone-based in the field trials. The pesticide application costs include pesticide costs, labour and machine costs of monitoring and pesticide applications. Investment costs of the necessary technical equipment for site-specific applications were included as annual labour and machine costs. As a major key performance indicator of partial budgeting at field level, extended gross margins were calculated. The economic scenario analysis showed pesticide application cost savings from 26 to 66% for site-specific applications compared to conventional applications. The average extended gross margin for site-specific applications of 787 € ha−1 compared to 631 € ha−1 for conventional application showed a clear economic advantage of the site-specific application scenarios. Site-specific pesticide applications can support farmers in implementing precise, sustainable and economically beneficial pesticide management. The technology presented may contribute to meet the goals of the European Green Deal to reduce use and risks of pesticides.
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