Les espèces migratrices sont très variées, depuis les insectes et les oiseaux jusqu’aux bisons et aux éléphants, depuis les requins et les dauphins jusqu’aux serpents. Qu’elles parcourent des milliers de kilomètres ou quelques kilomètres seulement, ces espèces jouent un rôle essentiel dans les écosystèmes du monde entier. Mais leurs divers habitats sont menacés par la dégradation des terres et la désertification.

Las especies migratorias existen en todos los tamaños y formas, desde los de minúsculos insectos y pequeñas aves hasta grandes búfalos y elefantes, pasando por tiburones y delfines o serpientes. Tanto si el viaje que realizan es de miles de kilómetros como de unos pocos, las especies migratorias desempeñan papeles esenciales en los ecosistemas de todo el planeta. Pero sus diversos hábitats se encuentran amenazados por la degradación de las tierras y la desertificación.

A través de un análisis histórico documental se reconocen los efectos del impacto humano en el territorio insular de Aysén, entre los siglos XVI y XIX. Los resultados obtenidos permiten reconstruir un proceso de intervención ambiental que alcanzó su peak en la segunda mitad del siglo XIX, marcado por una notoria degradación de los ecosistemas locales debido a la caza comercial de pinnipedos y la tala maderera del ciprés de las Guaitecas.

Los ecosistemas pastoriles del mundo se caracterizan por algún grado de aridez y pastoreo por grandes herbívoros, que por su biomasa por área y los efectos de su actividad pueden ser consideradas especies ingenieras del ecosistema. El objetivo de esta Tesis fue estudiar el efecto del manejo del pastoreo ovino sobre distintos niveles jerárquicos de organización de la vegetación en estepas áridas de la Patagonia, desde plantas hasta ecosistemas/comunidades pasando por poblaciones.

This report presents a comprehensive regional assessment of the Mediterranean, Middle East, and Sahel in terms of climate change impacts, vulnerabilities, conflict/cooperation and human security at various scales and in a variety of contexts. The Climate Change, Hydro Conflicts and Human Security (CLICO) project builds on interdisciplinary and cross-comparative research covering a variety of geographical scales and historical contexts to unravel social, political, environmental/ ecological and economic conditions in relation to the environment.

Urban wastewater management has become a major challenge in India as infrastructural development and regulations have not kept pace with population growth and urbanisation. This study argues that against the backdrop of water scarcity and climate change, it is important to examine issues related to wastewater reuse more holistically and to investigate the challenges and opportunities for its safe and efficient reuse.

The agricultural policies after Independence in South Korea can be roughly classified into three policies: policies for food increase till the 1970s, policies for structural improvement in the 1980s and 1990s, and policies for rice production adjustment in the 2000s. In the process, a policy for price support to encourage food production and increase farmer income, the policies for modernization of production processes, and the policies for expanding the scale of management were made and implemented.

This study has collated information on the role that pollution (air, water and soil pollution) has played in environmental degradation and the consequences of such degradation for human well-being, poverty. The report has primarily collated information from investigative studies that have been conducted in DFID priority countries of sub-Saharan Africa; additional information from key studies is also provided for South and
South East Asia DFID countries.

The Mineral and Petroleum Resources Development Amendment Bill of 2013 (MPRD-AB) has generated fresh debate regarding the appropriate system for allocating mineral prospecting and mining rights in South Africa. The draft bill no longer specifies that mining rights are to be allocated according to the first-in, first-assessed (FIFA) principle.

Extractive Industries (EI) explore, find, extract, process and market sub-soil assets – oil, gas and mined minerals. EI represent a large and growing activity in many less-developed countries. But natural resource wealth does not always lead to sustainable and inclusive growth. This guide sets out the recent rise in importance of EI to less-developed countries. It provides a framework for thinking about (i) the socio-economic impacts of these industries and (ii) the relationship between EI, host country public policies and donor activities.

The guide:

How have Latin American countries been using Environmental Impact Assessments in order to build more sustainable extractive industries? A focus on Peru provides some interesting lessons.

Is it possible to develop extractive industries while preserving the environment? Several Latin American countries have been attempting to improve the environmental sustainability of their extractive industry sectors by developing their legal frameworks, in particular through the use and adaptation of the Environmental Impact Assessment (EIA) tool.

As geographical areas subjected to rapid urbanisation and constantly  changing land use, peri-urban sites offer women and men greater economic opportunities.At the sametime,peri-urbanresidents are also drawn away from traditionalmeans of livelihood.As the city encroaches into prime agricultural lands in the fringe areas,occupations become more subsistence in nature.  This increases women's workload. Often women, who migrate from rural areas after marriage and settle in peri-urban zones,face enormous challenges in accessing water.