Ecosystem issues on a local scale
- Created by: Lauren
- Created on: 08-06-11 14:02
Urban niches - The place and role an organism occupies in an ecosystem
Types of urban habitat:
-Roads and railways
-Pavements, walls, buildings, abandoned warehouses and derelict land
-Ponds, lakes, resevoirs, canals, dock basins and sewerage works
-Gardens, allotments, cemeteries, city parks, playing fields and deer parks
-Remnents of woodlands, heathlands, meadows and wetlands
Changes in ecosystems as a result of urbanisation
Light availability - tall buildings reduce solar radiation
-Visual light pollution (seen at night) effects birds as they cannot see buildings and fly into them
-Moths like light = Bats eat moths
Water flow - Increased paved and tarmacced areas increases surface runoff so plant species are removed
Soil drainage - Soil is shallow and can be polluted by humans
-There are only a few green spaces in urban areas
Atmospheric pollution - Produces acid rain, pollutes lakes and kills plants
Colonisation of wasteland secondary succession
-Lithosere (bare rock)
-Provides microhabitats (heaps of rubble, gravelled areas, old walls/buildings)
1) Pioneer species colonise on bare soil 2) Mosses and lichens then grow 3) Grasses and herbs grow 4) Shrubs grow…
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