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Discuss the importance of human activities in maintaining the biodiversity of semi-natural ecosystems. Include the importance of man-made habitats in promoting biodiversity. Humans play an important role in maintaining the biodiversity of semi-natural habitats. Such areas are managed to prevent succession, conserve rare species and try to improve species richness. This conservation is putting to good use the country resources for amenity and recreation. Semi-natural ecosystems have many important values, including economic, environmental, wildlife, archival and heritage. Without human activities the biodiversity of semi-natural ecosystems would more than likely decrease in response to succession, agricultural processes, including nutrient enrichment, and to atmospheric pollution. Human activities aim to maintain natural ecosystems, traditional landscapes, high biodiversity and target species and community types. Many man-made habitats have improved species richness and had positive inputs to the environment. These include chalk and limestone quarries, gravel pits and inland waters, and the building of canals. In the UK...

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