How adjustments in land use patterns contribute to drought risk adaptation in a changing climate—A case study in China

In the context of climate change, adaptation to climatic extremes, such as drought, has attracted worldwide attention, yet many practical adaptation strategies need to be examined at the local level. Based on a case study of the village of Beidian, located in a drought-prone region in northern China, this study demonstrates that when faced with multiple pressures of regional climate change, drought risk and rural poverty, reasonable adjustments in land use patterns can serve as an effective adaptation strategy in the agricultural sector. We used household questionnaires, in-depth interviews with village managers, and land use surveys at the farming plot level to quantify the relationship between land use change and drought mitigation effects. Our findings indicate that in the past decade, the farming practices in Beidian have transformed from a complete reliance on the winter wheat–summer corn rotation to a new diversified mode of apple as the main crop and corn and coarse cereals as the subsidiary crops. The current farming mode is proven to possess a stronger adaptive capacity to drought due to its higher water-saving efficiency and economic benefit, which facilitates rural poverty reduction and socio-economic development. This study presents a feasible approach to address adaptation strategies at the local level, which provides policymakers with information on how to best support farm-level adaptation and to reduce farmers’ vulnerability to climatic extremes within the broader context of climate change.     

Effect of land-use change on soil fertility characteristics within water-stable aggregates of two cultivated soils in northern Iran

Forest and pastureland soils in highland of northern Iran are being seriously degraded and destructed due to extensive agricultural activities. These land use changes are usually accompanied by decreasing in concentrations of soil organic carbon and nutrients and also deterioration of soil structure in these regions. However, studies on concentration of nutrients and carbohydrates in soils suggest that the location of nutrients within aggregates of each size should be determined. This study was to evaluate the nutrient elements and carbohydrate distributions within water-stable aggregates (WSA) of virgin forest and pasture lands under different land uses in Alborz maintain range, northern Iran. In September 2006, soil samples were collected from depths of 0–20 cm in Typic Haploxerolls soils. The overall pattern indicated that the mean weight diameter (MWD) and WSA were greater in the virgin pasture and forest soils compared with the adjacent cultivated (ex-forest and ex-pasture) soils and aggregates of >1.0 mm size were dominant in the virgin soils, whereas the cultivated soils comprised aggregates of the size ≤0.5 mm. Distribution of organic carbon, nitrogen, phosphorus and carbohydrates within the WSA showed preferential enrichment of these parameters in the macroaggregate fraction (4.75–1.0 mm) for the virgin soils and microaggregate fraction (>0.25 mm) for the exposed soils. Cultivation decreased the concentration of carbohydrates by 23.6% and 20.6% in ex-forest and ex-pasture lands, respectively. Average distribution of total exchangeable bases within WSA showed that the cultivation of forest and pasture soils significantly led to reduce in these nutrient in the 4.75–2.0 mm fraction and increase in concentration of these exchangeable cations in <0.25 mm fractions. In general, results indicated that cultivation significantly led to 71% and 6% reductions in total exchangeable bases within the 4.75–2.0 and <0.25 mm aggregate fraction, respectively, for virgin soil. Since smaller aggregates are preferentially removed by erosion, this study emphasizes the need for sustainable soil management practices that they will minimize nutrient loss when forest or pastures lands are converted to croplands.     

An open-access method for targeting revegetation based on potential for emissions reduction,carbon sequestration and opportunity cost

We propose a simple heuristic that uses open-access models and government data on agricultural activities to estimate total carbon emissions from agriculture, the gross carbon benefit and the opportunity cost per tonne CO₂-e from revegetating to environmental plantings or plantation forestry. We test this across ten areas of mixed land-use that represent diverse Australian agricultural systems along a rainfall transect. The local value of agricultural production was obtained from government statistics and used to estimate the current economic opportunity cost of converting cleared agricultural land to mixed environmental plantings for carbon sequestration. Gross carbon benefit from revegetation was closely related to current agricultural use, as was financial opportunity cost. These were not related simply to site productivity potential or rainfall. The proportion of land cleared for agriculture that would need to be re-vegetated to achieve a localised zero-carbon land-use scenario was calculated by the ratio of current agricultural emissions to gross carbon benefit from revegetation; this ranged from 13% to 66% for groups of agricultural industries across Australian rainfall transects. While the heuristic does not capture the detail of models built specifically for local research questions it does provide a different lens on the questions policy makers and land managers may ask about the costs and benefits of revegetating agricultural land, and provides open-access methods to guide them.     

基于GIS的达州市土地利用变化及其驱动力分析

随着地理信息系统的发展,其成果广泛应用于土地利用监管、生态环境监测以及农业等各个方面。依据达州市2013年和2020年土地利用情况的矢量数据,通过土地利用动态度和主成分分析的方法,对达州市土地利用变化状况及其驱动因素进行分析。结果显示:达州市未利用土地占比大,建设用地持续增长;而驱动因素主要有社会经济发展、人口增长和政策。     

喀斯特地区土地利用变化与可持续利用研究——以贵州省贵阳市为例

以贵阳市为研究区域,在分析土地利用变化的基础上,从资源保护性、生态合理性、经济可行性、社会接受性等方面构建土地可持续利用指标体系.通过土地可持续利用综合评价模型和土地可持续利用障碍因素诊断模型,评价贵阳市土地可持续利用水平,分析其土地可持续利用的障碍因素,并提出相应的对策.     

Organizing anarchy: The food security–biodiversity–climate crisis and the genesis of rural land use planning in the developing world

Shortfalls in global food production, coupled with the growing visibility of climate change's disruptive effects, have underlined for many observers the importance of devoting rural lands to their ‘optimal’ use, where they can make maximal contributions to the global imperatives of feeding the human population and maintaining vital environmental services. In this context observers have endorsed rural land use planning as a way to insure that, at least in theory, lands get devoted to their best uses. In practice, land use planning in the developing world has resembled ‘organized anarchy’. Small landholders with insecure land tenure, overseas investors seeking large land deals, NGOs representing indigenous peoples, government officials, and staff from international environmental NGOs and multilateral organizations have come together in strategic action fields to struggle over and sometimes negotiate land use plans for contested landscapes. These plans represent a strategic, spatially explicit response to the climate change–biodiversity–food security crisis.     

Stakeholder perceptions and governance challenges in urban protected area management: The case of the Las Piñas – Parañaque Critical Habitat and Ecotourism Area,Philippines

The conservation and management of protected areas in urban settings has become increasingly challenging with dynamics over land use change in adjacent urban areas being highly relevant to, but at times conflicting with, the protected area. This study seeks to better understand the implications of land use change processes to urban protected area management through the case study of the Las Piñas – Parañaque Critical Habitat and Ecotourism Area (LPPCHEA) in Metro Manila, Philippines. Factors and processes influencing land use change and protected area management and the impact of stakeholders’ perceptions on protected area were analyzed. The urban protected area in itself has limited influence on its surrounding urban areas, as land use change in these areas is shaped more by social, economic and policy/institutional factors occurring within the context of urban-regional development. The study also found that land use conflict is evident in an urban protected area due to the competing ecosystem services derived by various stakeholders. This discord is deepened by the lack of coordination between land use planning and protected area management. Integrating protected area management with land use planning through legally binding instruments, specific timeframes and clear internal procedures can help resolve land use conflict for an urban protected area at the strategic or policy level.     

Does demographic change affect land use patterns?: A case study from Germany

Recent demographic change, mainly characterised by a decreasing and ageing population, is seen as one of the main factors for future land use development in Europe. However, there is still insufficient evidence about the relationship between demographic changes and land use changes since quantitative studies dealing with these interactions are still rare. We aim to fill that gap by presenting the first comprehensive study that investigates statistical relationships and spatial differentiations between demographic and land use change for the whole of Germany. Our study is based on data for the period from 1995/1996 to 2003/2004. The results clearly show that in most growing regions in the West of Germany a correlation was found between land use, natural population growth and net-migration, whereas for land use change in the shrinking regions in the East of Germany economic variables are of noticeable importance. A cluster analysis reveals “gaining” and “shrinking” regions concerning both urbanisation and demographic change. Neither a decreasing nor an ageing population imply reduced land consumption for housing and transportation. Furthermore we found a decreasing settlement population density for almost all German districts regardless of population growth or shrinkage.     

Does EU rural expenditure correspond to regional development needs?

The EU offers a complex system of rural development interventions as part of its Common Agricultural Policy. A Common Monitoring and Evaluation Framework (CMEF) has been developed for the programming period 2007–2013 in response to challenges faced with the evaluation of rural development measures in earlier programming periods.Statistical and multivariate analysis of CMEF baseline (regional characteristics) and input (expenditure) indicator data at the NUTS2 subdivision level is used to compare four typical expenditure allocation patterns (Competitiveness, Environment, Rural Viability, Equal Spending) in terms of associated regional characteristics and development trends.The results suggest expenditure priorities are generally in line with regional needs and that there are some positive development trends, for example higher increase of agricultural labour productivity in the Competitiveness Group, while for environmental topics the level of data required remains unsatisfactory for trend assessment. 17% of the regions have a budget allocation pattern deviating from other regions with similar characteristics, which could indicate ineffective priority setting. Consistent CMEF data over multiple programming periods would be desirable to support the relationships found and to facilitate time series analysis, but this seems questionable given that the European Commission has discontinued the CMEF in 2014 with further adaptations for the 2014–2020 programming period underway.     

“Let's try to get the best out of it” understanding land transactions during land use change

This article investigates land transactions in relation to intended land use change from a micro-scale perspective. A better understanding of land transactions is important for understanding and influencing how land is used. The aim is to explore how the different aspects and their interrelations influence landowner behaviour during land transactions initiated by the government. The study draws on 42 explorative interviews with land purchasers, land policy experts, planning professionals and local farmers.The study shows that uncertainty, and feelings of justice are pivotal aspects during land transactions. Moreover, land transactions are co-evolving with the planning process. Landowners exhibit strategic behaviour based on their personal situation and their expectations on uncertain aspects. The strategies are strongly interrelated with the evolution of land use change. Land use changes are both input on which actors base their strategies, as well as the outcome of those strategies. The aspects found in this study were strongly interrelated and changed over time. Some aspects were context dependent, while others are expected to influence land transactions in general. In this light, the strength of a successful planner is twofold: on the one hand a planner needs to be a good communicator; on the other hand a planner should be able to deal with uncertainty and expectations during plan processes.