Developmental disorders
Chapter C.4
Divers
Chapitre J.1
Edition en français
Traduction : Laure Woestelandt, Jordan Sibeoni Sous la direction de : Marie-Rose Moro Avec le soutien de la SFPEADA
Trouble de l'humeur
Chapitre E.2
Edition en français Traduction : Xavier Benarous Sous la direction de : David Cohen Avec le soutien de la SFPEADA
Troubles anxieux
Chapitre F.1
Edition en français Traduction : Jean-Philippe Raynaud Avec le soutien de la SFPEADA
Autres troubles
Chapitre H.2
Edition en français Traduction : Vladimir Ferrafiat Sous la direction de : Priscille Gérardin Avec le soutien de la SFPEADA
Autres troubles
Chapitre H.4
Troubles du Développement
Chapitre C.2
Phil. Trans. R. Soc. B (2010) 365, 2959–2971; doi:10.1098/rstb.2010.0143.
Agricultural ecosystems provide humans with food, forage, bioenergy and pharmaceuticals and are essential to human wellbeing. These systems rely on ecosystem services provided by natural ecosystems, including pollination, b...iological pest control, maintenance of soil structure and fertility, nutrient cycling and hydrological services. Preliminary assessments indicate that the value of these ecosystem services to agriculture is enormous and often underappreciated. Agroecosystems also produce a variety of ecosystem services, such as regulation of soil and water quality, carbon sequestration, support for biodiversity and cultural services. Depending on management practices, agriculture can also be the source of numerous disservices, including loss of wildlife habitat, nutrient runoff, sedimentation of waterways, greenhouse gas emissions, and pesticide poisoning of humans and non-target species. The tradeoffs that may occur between provisioning services and other ecosystem services and disservices should be evaluated in terms of spatial scale, temporal scale and reversibility. As more effective methods for valuing ecosystem services become available, the potential for ‘win–win’ scenarios increases. Under all scenarios, appropriate agricultural management practices are critical to realizing the benefits of ecosystem services and reducing disservices from agricultural activities.
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Arsenic contaminated tube well water was first detected in Bangladesh in early 1990s. The arsenic comes from naturally arsenic-rich material delivered by the region's river systems, deposited over many years to make up the land of Bangladesh. Arsenic contamination is not caused by tube wells, or by ...irrigation or application of fertilizers.
Today, although 98 per cent of the population uses an improved drinking water source the safe water coverage of Bangladesh is 86 per cent because of arsenic contamination.
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Identifying and quantifying planetary boundaries that must not be transgressed could help prevent human
activities from causing unacceptable environmental changes.
nature Vol 461|24 September 2009
November 3, 2009https://doi.org/10.1371/journal.pmed.1000176
PLoS Med 6(11): e1000176. https://doi.org/10.1371/journal.pmed.1000176
BMJ 2009; 338 doi: https://doi.org/10.1136/bmj.b158 (Published 05 February 2009)
Cite this as: BMJ 2009;338:b158
Correspondence to: A Burns alistair.burns@manchester.ac.uk