Environmental Management最新文献

The continuous increase of anthropogenic activities reinforces their stress on aquatic ecosystems (from continental to marine ecosystems) that are the most altered ecosystems on Earth. To evaluate the risk of ecosystem decline toward human alterations, the concept of “ecological vulnerability” was developed to help managers to prioritize conservation actions. Various definitions of vulnerability and its components were used, but this concept is often centered on the intersection of three components: sensitivity, exposition, and adaptive capacity. The aim of this study was through a review of the scientific literature of the last 10 years, first to assess the goals of the use of the concept of vulnerability in aquatic ecology: for which pressure (e.g., climate change, predation) and organism, on which level of organization (individuals, species, …). The second objective, was to address the methods developed to assess vulnerability: which components were considered, which metrics were used, the scoring process… Fish were the organisms the most frequently concerned and the number of publications decreased with the increasing complexity of biodiversity studied (from populations to multitrophic organizations). Climate change was the main stressor for which vulnerability was assessed. Vulnerability was commonly defined as being highly sensitive, highly exposed and lowly adaptable even if adaptive capacity was rarely addressed. This study showed an interest in the concept of vulnerability to protect aquatic ecosystems. Nonetheless, to better evaluate their risk of biodiversity loss, we should consider vulnerability at a higher level of organization and encompass the adaptive capacity of the biota.

This study uses stated preference techniques to evaluate the willingness to pay for improved groundwater in PEI, which allows us to estimate the social cost of nitrogen in this region. ‘Beneficial Management Practices’ (BMPs) are often employed in PEI’s agricultural sector, to improve crop yields but also reduce adverse environmental effects such as nitrogen leaching that can affect ground and surface waters. PEI residents were surveyed to estimate a dollar value of improved water quality due to reduced nitrogen leaching due to BMPs. From the responses to a double-bounded dichotomous choice survey, models using maximum likelihood estimation showed that residents of PEI were willing to pay roughly $230 per year to see a reduction in nitrogen of either 20% or 50%, which translated to $5–13 per kg of nitrogen reduced. However, excluding ‘yeah-sayers’ and protest votes suggests that WTP is lower for the 20% reduction and increases as nitrogen reduction increases. Thus, a social cost of $13/kg should be considered an upper bound in PEI. WTP values, as well as estimates of the social cost of nitrogen are similar to values in previous literature. We find that variables such as cell phone usage, belief that farmers should pay for BMPs, and spending on water filtration have a statistically significant impact on WTP. Other variables are significant in some model specifications, however many demographic variables such as employment status and education do not affect WTP.

Despite various interventions to protect forests, many developing countries, including Ethiopia, continue to face substantial forest conservation challenges, particularly where local communities heavily rely on forests for their livelihoods. Recognizing the urgency of this issue, the government of Ethiopia introduced Participatory Forest Management (PFM) and devolved forest management responsibilities to enhance forest conservation. Therefore, this assessment examines the impacts of PFM on forest cover based on an analysis of the Land Use/Land Cover Change (LULCC) over the last 23 years in Adaba-Dodola, and its implications for REDD+ implementation. The study involved determining the LULCC of the Adaba-Dodola forest after the introduction of PFM from 2000 to 2023. Landsat images of 2000, 2012, and 2023 were analyzed to detect LULCC. The study result showed that the Adaba-Dodola forest cover increased by 1.83% since the PFM was introduced. The decreased agricultural land by 0.87% was the main factor attributed to the increase in shrub cover, while shrubland attributed to the rise in forest cover. Net areas of about 148 ha/year of shrublands were converted into forest land owing to significant forest regeneration, while shrublands had a net gain of 110.5 ha/year from agriculture and grasslands between 2000 and 2023. The increase in forest cover is attributed to the effectiveness of PFM in halting deforestation and promoting forest conservation. Thus, the PFM approach is a tool for preserving forest ecosystems and mitigating the adverse effects of deforestation and forest degradation, therefore would be used as an umbrella for implementing REDD+.

Collaborative governance has become a prominent, if not dominant, framework for thinking about multi-scalar and cross-jurisdictional environmental management. The literature broadly and consistently suggests that collaborative capacity and inter-organizational networks provide the institutional framework for addressing social-ecological system challenges. Surprisingly little scholarship addresses processes of social influence (or contagion) in social-ecological systems writ large, or more specifically as it relates to collaborative capacity. In this study, we consider the relationship between network position and structure and “collaborative capacity”. We use a linear network autocorrelation model to establish a quantifiable, statistical relationship between an organizational-level outcome (collaborative capacity) for organizations that are relationally connected in a network addressing conservation and management issues in the U.S. sagebrush biome. We test three general hypotheses: (1) that social position – operationalized as network centrality – is related to collaborative capacity, (2) that subgroup or community structure – operationalized as modularity – is related to collaborative capacity, and (3) that there is a social contagion effect of collaborative capacity. Our results identify a positive relationship between collaborative capacity and organizations in positions of brokerage as well as evidence of a “collaborative capacity” contagion effect. This work contributes to our understanding of the role of bridging organizations and networks for large-scale environmental management.

Climate change impacts comprise a particular challenge for authorities when reconciling the implications of land use planning decisions. Whilst Strategic Environmental Assessment (SEA) is typically applied to the development of urban land use plans, the selection of mitigation and adaptation strategies for climate change impacts can have knock-on effects on nature. However, Nature-based Solutions (NbSs) could provide an innovative means of addressing climate change mitigation and adaptation without these knock-on effects. The main aim of this research is therefore to propose a conceptual framework for embedding NbSs into the main stages of the SEA process to potentially enhance climate change mitigation and adaptation in urban land use planning. This is achieved through a systematic literature review of academic and grey literature sources, with subsequent content analysis. This study demonstrates the value of matching these manifold NbS approaches to climate change impacts potentially addressed in SEA process stages and suggests how this might be achieved in practice focusing on urban land use plans.