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Book (stand-alone)Technical studyDeep-ocean climate change impacts on habitat, fish and fisheries
FAO Fisheries and Aquaculture Technical Paper No. 638
2019Also available in:
No results found.This publication presents the outcome of a meeting between the FAO/UNEP ABNJ Deep-seas and Biodiversity project and the Deep Ocean Stewardship Initiative. It focuses on the impacts of climatic changes on demersal fisheries, and the interactions of these fisheries with other species and vulnerable marine ecosystems. Regional fisheries management organizations rely on scientific information to develop advice to managers. In recent decades, climate change has been a focus largely as a unidirectional forcing over decadal timescales. However, changes can occur abruptly when critical thresholds are crossed. Moreover, distribution changes are expected as populations shift from existing to new areas. Hence, there is a need for new monitoring programmes to help scientists understand how these changes affect productivity and biodiversity. The principal cause of climate change is rising greenhouse gases and other compounds in the atmosphere that trap heat causing global warming, leading to deoxygenation and acidification in the oceans. Three-dimensional fully coupled earth system models are used to predict the extent of these changes in the deep oceans at 200–2500 m depth. Trends in changes are identified in many variables, including temperature, pH, oxygen and supply of particulate organic carbon (POC). Regional differences are identified, indicating the complexity of the predictions. The response of various fish and invertebrate species to these changes in the physical environment are analysed using hazard and suitability modelling. Predictions are made to changes in distributions of commercial species, though in practice the processes governing population abundance are poorly understood in the deep-sea environment, and predicted -
Book (stand-alone)Technical bookGlobal Symposium on Soil Erosion (GSER 2019): Symposium working documents
Assessment tools, management practices and economics of soil erosion
2019Also available in:
No results found.At its Sixth Session in June 2018, the Global Soil Partnership (GSP) Plenary Assembly (PA), upon request of its Intergovernmental Technical Panel on Soils (ITPS), voted to organize a Symposium on soil erosion “considering that this is the main threat affecting global soils”. The Symposium aims to incentivize bottom-up global soil erosion assessments under the umbrella of the Food and Agriculture’s (FAO) GSP. The Global Symposium on Soil Erosion (GSER19) is organized around three key themes: 1. Soil erosion assessment tools and data: creation, consolidation and harmonization; 2. Best erosion management practices of the last 20 years and policy support to address human-induced erosion; 3. The economics of soil erosion Although the three themes will be treated separately during the Symposium, they are inter-related. Prior to the GSER19 and for each of the themes, working groups were set up with the objective of discussing the key topics to be tackled for each theme. The discussions held within each of the three working groups were then translated into working documents that are presented in this final document. The three theme working documents will eventually assist the GSP and its partners in planning upcoming actions to address soil erosion at the global, regional and local level. A revised version of this document will be included in the outcome c of the Symposium, which will be published after the event. The working groups were composed of experts, members of the GSP’s ITPS, and the Science-Policy Interface of the United Nations Convention to Combat Desertification (SPI-UNCCD), who participated on a voluntary basis. -
MeetingMeeting documentGlobal Symposium on Soil Erosion - Concept Note
Rome, Italy, 15-17 May 2018
2019Also available in:
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