Suchergebnisse

Agricultural Land-Use Change (ALUC) is a major driver of global environmental change, not least via its direct impact on the sustainability and resilience of the rural economy. Its drivers are complex and have remained contentious, necessitating further empirical study. This study aims to derive context-specific evidence on the driving factors and effects of ALUC from different stakeholders' perceptions. We carried out household surveys and participatory rural appraisal across Benue State, Nigeria. ALUC has economic, social, ecological, and institutional implications for farmers and on agricultural productivity. Farmers perceived that the main factors driving ALUC were land conflict, government land-use policies and infrastructural development. Stakeholders' perceptions revealed that although the factors driving ALUC are diverse in nature, they are somewhat embedded within the broader issue of land-use conflict, which has led to cropland abandonment, clearing of forest vegetation, soil degradation, changes from large scale to subsistence farming, and farmers' eventual loss of interest in agriculture. This suggest that the drivers and implications of ALUC go beyond simple changes to the extent of land used for agriculture, but also incorporates other regional socio-ecological changes. Our study highlights the importance of stakeholders' perceptions in understanding complex socio-ecological issues if we are to provide clear direction into areas where policy interventions are most needed.

Today, one of the biggest challenges facing the UK is the new target set when the nation became first major economy to pass net zero emissions law, which requires the country to bring all greenhouse gas emissions to net zero by 2050. On the one hand, there are already a few ideas about how we should farm and use land in order to deliver such a target. On the other hand, the government has a new strategy which is to pay farmers for providing public goods, especially for climate change mitigation through the reduction and storage of greenhouse gas emissions. The most critical task is to find a solution to such a question as "How should public spending on farm public goods be allocated?" In this paper, we argue that formulating an effective subsidy scheme cannot focus on the public need alone, but should also take into consideration what farmers must endure and the opportunities they must forgo. This requires a good understanding about the generating process behind the spatial heterogeneity of agricultural land-use at a _ne spatial scale. We aim to provide government and its agents with decision support for policy making post-Brexit in two directions. Firstly, we employ detailed spatial resolution data and establish a new statistical tool that can help: (i) to effectively capture the spatial heterogeneity of agricultural land-use, (ii) to disentangle the contributions of terrain formulations, environmental characteristics, climatic conditions, policies, and other legacy and agglomeration effects in the generating process of the land-use patterns, and (iii) accurately gauge their relative importance across different regions of GB for more targeted subsidies schemes. Secondly, we employ our new method and provide policy advice and evaluation.

Agricultural Land-Use Change (ALUC) is a major driver of global environmental change, not least via its direct impact on the sustainability and resilience of the rural economy. Its drivers are complex and have remained contentious, necessitating further empirical study. This study aims to derive context-specific evidence on the driving factors and effects of ALUC from different stakeholders' perceptions. We carried out household surveys and participatory rural appraisal across Benue State, Nigeria. ALUC has economic, social, ecological, and institutional implications for farmers and on agricultural productivity. Farmers perceived that the main factors driving ALUC were land conflict, government land-use policies and infrastructural development. Stakeholders' perceptions revealed that although the factors driving ALUC are diverse in nature, they are somewhat embedded within the broader issue of land-use conflict, which has led to cropland abandonment, clearing of forest vegetation, soil degradation, changes from large scale to subsistence farming, and farmers' eventual loss of interest in agriculture. This suggest that the drivers and implications of ALUC go beyond simple changes to the extent of land used for agriculture, but also incorporates other regional socio-ecological changes. Our study highlights the importance of stakeholders' perceptions in understanding complex socio-ecological issues if we are to provide clear direction into areas where policy interventions are most needed.

AbstractAgriculture, the world's most dominant land use type, burdens freshwater biodiversity with a multitude of stressors such as diffuse pollution and hydromorphological alteration. However, it is difficult to directly link agricultural land use with biota response as agricultural stressors can also originate from other causes. Also, there is evidence for positive and negative effects of agriculture on organisms, agricultural impact differs strongly with the biological metric and study region considered and agricultural impact differs among practice and type, which in turn affects different organism groups with varying severity. Against this background, our study aimed at assessing, if agricultural land use has a consistent effect on river biota. We conducted a systematic review of the literature, which yielded 43 studies and 76 relationships between agriculture and aquatic organism groups. The relationships were subjected to a meta-analysis using Hedge's g to calculate the standardized mean difference of effects. Overall, we detected a medium to strong effectg = − 0.74 of agricultural land use on freshwater biota, only marginally influenced by study design, river type and region. Strong differences in biota response could be observed depending on the biological metric assessed, with ecological quality indices of agricultural impairment performing best. Sensitive taxa declined with agricultural impact, while tolerant taxa tended to benefit. In addition, the biota response differed among agricultural types and practices and organism group, with macroinvertebrates showing the strongest effect. Our results quantify the effects of agriculture on riverine biota and suggest biological metric types for assessing agricultural impact. Further research is needed to discriminate between agricultural types and account for intensity.