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Displaying 637 - 648 of 1181

Land institutions and supply chain configurations as determinants of soybean planted area and yields in Brazil

Journal Articles & Books
Décembre, 2013
Brésil

Soybean production has become a significant force for economic development in Brazil. It has also received considerable attention from environmental and social non-governmental organizations as a driver of deforestation and land consolidation. While many researchers have examined the impacts of soybean production on human and environmental landscapes, there has been little investigation into the economic and institutional context of Brazilian soybean production or the relationship between soy yields and planted area.

comparative assessment of land cover dynamics of three protected forest areas in tropical eastern Africa

Journal Articles & Books
Décembre, 2010
Ouganda
Kenya
Afrique
Afrique orientale

Processes of deforestation, known to threaten tropical forest biodiversity, have not yet been studied sufficiently in East Africa. To shed light on the patterns and causes of human influences on protected forest ecosystems, comparisons of different study areas regarding land cover dynamics and potential drivers are needed. We analyze the development of land cover since the early 1970s for three protected East African rainforests and their surrounding farmlands and assess the relationship between the observed changes in the context of the protection status of the forests.

Adapting a global stratified random sample for regional estimation of forest cover change derived from satellite imagery

Journal Articles & Books
Décembre, 2011

A desirable feature of a global sampling design for estimating forest cover change based on satellite imagery is the ability to adapt the design to obtain precise regional estimates, where a region may be a country, state, province, or conservation area. A sampling design stratified by an auxiliary variable correlated with forest cover change has this adaptability. A global stratified random sample can be augmented by additional sample units within a region selected by the same stratified protocol and the resulting sample constitutes a stratified random sample of the region.

Comparison and analysis of agricultural and forest land changes in typical agricultural regions of northern mid-latitudes

Journal Articles & Books
Décembre, 2013
Chine
États-Unis d'Amérique
Europe

The northeastern China, the United States, and the western Europe are important agricultural regions both on the global and regional scales. The western Europe has a longer history of agricultural land development than the eastern United States. These two regions have changed from the deforestation and reclamation phase in the past to the current land abandonment and reforestation phase. Compared with the two regions, large-scale land exploitation has only been practiced in the northeastern China during the last century.

Confronting the Food–Energy–Environment Trilemma: Global Land Use in the Long Run

Journal Articles & Books
Décembre, 2016

Economic, agronomic, and biophysical drivers affect global land use, so all three influences need to be considered in evaluating economically optimal allocations of the world’s land resources. A dynamic, forward-looking optimization framework applied over the course of the coming century shows that although some deforestation is optimal in the near term, in the absence of climate change regulation, the desirability of further deforestation is eliminated by mid-century.

Aquatic systems and water security in the Metropolitan Valley of Mexico City

Journal Articles & Books
Décembre, 2011

In megacities water quantity and quality are threatened by complex and interrelated processes caused by population growth, land use change, unsustainable agricultural practices, deforestation, erosion, destruction of ecosystems, lack of planning, laissez-faire policies, unsustainable water management, political conflicts, and increasingly also by the impacts of climate change.

Multidisciplinary study of Holocene archaeological soils in an upland Mediterranean site: Natural versus anthropogenic environmental changes at Cecita Lake, Calabria, Italy

Journal Articles & Books
Décembre, 2013
Italie

This paper highlights results of a multidisciplinary and multi-analytical study of Holocene archaeological soils around Cecita Lake (Sila massif, Calabria, southern Italy), which represents a typical upland Mediterranean environment. It is focused on assessment of climatic and environmental changes that took place since late Neolithic to Roman times, trying to discriminate natural from anthropogenic signals.

Linking Land Cover Changes in the Sub‐Alpine and Montane Belts to Changes in a Torrential River

Journal Articles & Books
Décembre, 2016

Channel changes are the consequence of changes in sediment yield from the slopes and in the connectivity between slopes and channels because of distinct land use and climate impacts. In this study, we investigated the characteristics and evolution of a short reach in the headwater of the Ijuez River, central–southern Pyrenees. Assessment of a series of sedimentary and geomorphic structures confirmed major changes to the valley bottom, mainly related to changes in the intensity of human activity.

Spatial Assessment of Land Degradation Risk for the Okavango River Catchment, Southern Africa

Journal Articles & Books
Décembre, 2016
Afrique australe
Afrique

The Okavango catchment in southern Africa is subject to environmental as well as socio‐economic transformation processes such as population growth and climate change. The degradation of soil and vegetation by deforestation and overgrazing is one of the downsides of this development, reducing the capacity of the land to provide ecosystem functions and services. In this study, climate simulations are brought together with secondary socioeconomic, pedologic and remote‐sensing data in a GIS‐based assessment of the factors commonly associated with land degradation risk.

Deforestation rates in insular Southeast Asia between 2000 and 2010

Journal Articles & Books
Décembre, 2011

Insular Southeast Asia experienced the highest level of deforestation among all humid tropical regions of the world during the 1990s. Owing to the exceptionally high biodiversity in Southeast Asian forest ecosystems and the immense amount of carbon stored in forested peatlands, deforestation in this region has the potential to cause serious global consequences. In this study, we analysed deforestation rates in insular Southeast Asia between 2000 and 2010 utilizing a pair of 250 m spatial resolution land cover maps produced with regional methodology and classification scheme.

Rapid deforestation threatens mid‐elevational endemic birds but climate change is most important at higher elevations

Journal Articles & Books
Décembre, 2014
Indonésie

AIM: Deforestation and climate change are two of the most serious threats to tropical birds. Here, we combine fine‐scale climatic and dynamic land cover models to forecast species vulnerability in rain forest habitats. LOCATION: Sulawesi, Indonesia. METHODS: We sampled bird communities on four mountains across three seasons in Lore Lindu National Park, Sulawesi, Indonesia (a globally important hotspot of avian endemism), to characterize relationships between elevation and abundance. Deforestation from 2000 to 2010 was quantified, and predictors of deforestation were identified.

Events

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Après la COP28, favoriser l’innovation pour mieux mesurer l’adaptation

11 Mars 2024
Mardi 12 mars 2024 16:30 - 18:00 OÙ ? Uniquement en ligne

À mesure que les impacts du changement climatique s’intensifient, il est essentiel de comprendre si l’humanité est sur la bonne voie pour s’adapter ou sur la voie d’une augmentation des niveaux de risque. Cela soulève de nombreux défis, notamment méthodologiques. Dans le sillage de la COP28, cette conférence vise à explorer les outils qualitatifs innovants pour mesurer les progrès d’adaptation, offrant des perspectives complémentaires aux méthodes quantitatives traditionnelles.

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Alors que le changement climatique continue de s'accentuer, et que les risques associés deviennent plus intenses et complexes que prévu, le dernier rapport du GIEC a montré que les politiques et les projets d’adaptation au climat sont souvent mal suivis.

Les méthodes d’évaluation basées sur des indicateurs quantitatifs ont été jusqu’à présent prédominantes, mais elles montrent des limites, notamment en ce qui concerne la difficulté d’identifier les données statistiques qui saisissent la nature complexe de l’adaptation (par exemple, au-delà des mesures quantitatives du PIB ou du revenu).

Cet événement vise à présenter des outils qualitatifs innovants pour mesurer l’adaptation basés sur des jugements d’experts structurés : Gap Track (IDDRI), le Système d’évaluation de la résilience (Banque mondiale) et le Diagnostic de la capacité d’adaptation et de résilience des pays (Banque mondiale), sont des contributions majeures pour mieux évaluer les progrès de l’adaptation à différentes échelles.

De tels outils d’évaluation peuvent donc s'avérer essentiels, à la fois pour alimenter l’Objectif mondial d’adaptation (GGA) de la CCNUCC, en particulier le programme de travail biennal sur les indicateurs décidés à la COP28, ainsi que pour les ministères de l’Environnement et tous les partenaires de développement international, dans la perspective du deuxième bilan mondial en 2028.

Le webinaire se tiendra en ligne uniquement, en anglais avec traduction française simultanée.

En savoir plus sur le programme AdaptAction : www.afd.fr/adaptaction

Agence Française de Développement
United Nations Framework Convention on Climate Change
World Bank Group

Organizations

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