By United Nations
This lovely 400-page Atlas is a distinct and robust booklet which brings to gentle tales of environmental switch at greater than a hundred destinations unfold throughout each nation in Africa. There are greater than three hundred satellite tv for pc pictures, three hundred floor images and one hundred fifty maps, besides informative graphs and charts that supply a vibrant visible portrayal of Africa and its altering atmosphere that offer medical facts of the impression that common and human actions have had at the continents surroundings over the last numerous a long time. The observations and measurements of environmental switch aid gauge the level of growth made by way of African nations in the direction of attaining the United international locations Millennium improvement targets. extra importantly, this booklet contributes to the data and figuring out which are crucial for model and remediation, and will be of great worth to all those that need to know extra approximately Africa and who care concerning the way forward for this continent.
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Extra info for Africa: Atlas of Our Changing Environment
The effective use of biodiversity at all levels—genetic material, species, communities, and ecosystems—is a precondition for sustainable development. However, human activities are the root cause of declining biodiversity worldwide; losses of plants, animals, and other species are taking place at a rate far higher than the natural background rate of extinction (UNEP 2008). The African mainland has between 40 000 and 60 000 plant species. Southern Africa alone has at least 580 families and about 100 000 known species of insects, spiders, and other arachnids (Anon 2007).
Aquaculture is gaining importance in Africa. Egypt is the largest producer of ﬁsh by aquaculture, and is second only to China in the production of tilapia, a native African species (FAO 2006). ). 20 Tub of tilapia K. com Freshwater Fish The abundance of ﬁsh in a number of Africa’s major river systems has declined (as it has in Asia, Australia, Europe, the Middle East, North America, and South America) due to targeted ﬁshing for large freshwater species (FAO 2006). ). In addition to unsustainable harvests, inland ﬁsheries are affected by environmental degradation and exotic species introductions (Balirwa 2007).
Local ﬁsheries are periodically affected by episodic warming in the eastern Atlantic that causes sea temperatures to rise offshore of Namibia and southern Angola. These events displace ﬁsh stocks and cause massive marine-life mortalities. The region is also subject to harmful algal blooms (HABs), since much of the water is naturally hypoxic (lacking in oxygen), a condition exacerbated by local oxygen depletion processes. For many decades, a large variety of ﬁsh species have been exploited in this region, especially pilchards and mackerels, ground ﬁsh, rock lobster, high seas tuna, shrimps, and deepsea species.
Africa: Atlas of Our Changing Environment by United Nations