Перейти к основному содержанию

page search

Displaying 8221 - 8232 of 17898

Possible impacts of climate change on water quality in streams of the Czech Republic

Journal Articles & Books
декабря, 2015
Czech Republic

The impacts of changes in water temperature and flow on selected water quality parameters, as one of the consequences of climate change, were studied in river catchments in the Czech Republic with little anthropogenic influence. The impact of climate change was manifested by an increase in stream temperature by 1.15°C over 28 years. The selected water quality parameters were dependent on flow, with up to 10-fold increases in the concentrations of ammonia, phosphorus and chlorophyll- a at minimum flow levels.

Impact of Land Use and Land Cover Changes on Organic Carbon Stocks in Mediterranean Soils (1956–2007)

Journal Articles & Books
декабря, 2015
Spain

During the last few decades, land use changes have largely affected the global warming process through emissions of CO₂. However, C sequestration in terrestrial ecosystems could contribute to the decrease of atmospheric CO₂rates. Although Mediterranean areas show a high potential for C sequestration, only a few studies have been carried out in these systems. In this study, we propose a methodology to assess the impact of land use and land cover change dynamics on soil organic C stocks at different depths.

Multi‐Scale Anthropogenic Driving Forces of Karst Rocky Desertification in Southwest China

Journal Articles & Books
декабря, 2015
China

Karst rocky desertification (KRD) is a type of land degradation especially prominent in southwest China. This article analyzes the anthropogenic driving forces of KRD at two scales: rural locality and its macro socio‐economic circumstances. At the rural locality scale, the intensive human pressure on land because of a large and fast growing population and unsustainable land use are identified to be the reason for KRD. However, more radical driving forces lie in the farmers' disadvantages in social‐economic circumstances, which compel them to overuse rural land.

Mapping of regional soil salinities in Xinjiang and strategies for amelioration and management

Journal Articles & Books
декабря, 2015
China

Information on the spatial distribution of soil salinity can be used as guidance in avoiding the continued degradation of land and water resources by better informing policy makers. However, most regional soil-salinity maps are produced through a conventional direct-linking method derived from historic observations. Such maps lack spatial details and are limited in describing the evolution of soil salinization in particular instances.

Dynamics of soil organic carbon stock in a typical catchment of the Loess Plateau: comparison of model simulations with measurements

Journal Articles & Books
декабря, 2015

Land use changes are known to significantly affect the soil C balance by altering both C inputs and losses. Since the late 1990s, a large area of the Loess Plateau has undergone intensive land use changes during several ecological restoration projects to control soil erosion and combat land degradation, especially in the Grain for Green project. By using remote sensing techniques and the Yasso07 model, we simulated the dynamics of soil organic carbon (SOC) stocks in the Yangjuangou catchment of the Loess Plateau.

Spatial controls on dissolved organic carbon in upland waters inferred from a simple statistical model

Journal Articles & Books
декабря, 2015

Dissolved organic carbon (DOC) concentrations in upland surface waters in many northern hemisphere industrialised regions are at their highest in living memory, provoking debate over their “naturalness”. Because of the implications for drinking water treatment and supply there is increasing interest in the potential for mitigation through local land management, and for forecasting the likely impact of environmental change. However, the dominant controls on DOC production remain unresolved, hindering the establishment of appropriate reference levels for specific locations.

Perception of land consolidation by land owners: a case study

Journal Articles & Books
декабря, 2015
Slovakia

Land consolidation in Slovak Republic is claimed to be negatively perceived, although, there is no empirical evidence of this. This is used by administration to interfere with land consolidation. Based on owners' opinion in cadastral area of Malý Báb, where land consolidation was carried out, we show that a positive view on land consolidation prevails (almost 80%). Groups of respondents with inclination to a negative perception (e.g. the seniors with bad experiences in the past, ignorant juniors) were identified, problematic areas (e.g.

Farmer-Managed Natural Regeneration Enhances Rural Livelihoods in Dryland West Africa

Journal Articles & Books
декабря, 2015
Ghana

Declining agricultural productivity, land clearance and climate change are compounding the vulnerability of already marginal rural populations in West Africa. ‘Farmer-Managed Natural Regeneration’ (FMNR) is an approach to arable land restoration and reforestation that seeks to reconcile sustained food production, conservation of soils, and protection of biodiversity. It involves selecting and protecting the most vigorous stems regrowing from live stumps of felled trees, pruning off all other stems, and pollarding the chosen stems to grow into straight trunks.

Water content dynamics in a volcanic ash soil slope in southern Chile

Journal Articles & Books
декабря, 2015
Chile

Andisols present exceptional physical properties, making up 24%), however, during summer they can reach volumetric water contents near to the permanent wilting point quickly at a depth of 5 cm. The water table altitude was directly related to the temporal changes of θFᵢₑₗd measured at a depth of 50 cm, highlighting the fact that the saturated and unsaturated zones are connected.

Why landscape ecologists should contribute to life cycle sustainability approaches

Journal Articles & Books
декабря, 2015
Indonesia

CONTEXT: Understanding the consequences of changes in land use and land cover is among the greatest challenges in sustainability science, yet key themes related to land cover change are often left out of sustainability assessment tools. Because sustainability teaching is expanding at a rapid rate, incorporation of interdisciplinary, rigorous, quantitative tools to distinguish sustainable and unsustainable landscape change are needed.

Conserving Biodiversity: Practical Guidance about Climate Change Adaptation Approaches in Support of Land-use Planning

Journal Articles & Books
декабря, 2015

As species' geographic ranges and ecosystem functions are altered in response to climate change, there is a need to integrate biodiversity conservation approaches that promote natural adaptation into land use planning. Successful conservation will need to embrace multiple climate adaptation approaches, but to date they have not been conveyed in an integrated way to help support immediate conservation planning and action in the face of inherent spatial uncertainty about future conditions.

Agricultural drought trends and mitigation in Tillaberí, Niger

Journal Articles & Books
декабря, 2015
Niger
Global

Whether aggravated agricultural drought in the Sahel is related to a changing climate (meteorological drought, i.e., deficit of rainfall or unfavourable rainfall distribution) or to land use and land degradation (soil-water drought, i.e., decreased water infilitration and water holding capacity) is a much-debated issue.