Erstellt von iram_sonia5
vor mehr als 11 Jahre
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Frage | Antworten |
ECOSYSTEM | A physical environment with a particular set of conditions, plus all the orgainisms in it. Can be natural or artificial |
NATURAL ECOSYSTEMS | Have high biodiversity. Different types of plants and organisms coexist in the same environment. examples: lakes and natural woodland |
ARTIFICIAL ECOSYSTEMS | Are set up and maintained for a particular purpose so have low biodiversity. Weedkillers, Pesticides and fertilisers are used to prevent other plants and organisms growing alongside crops. |
why do forestry plantations have low biodiversity comp to natural woodlands? | -havent been estabilished for long.and result from interactions and relationships between organisms -because the few species introduced at the start may not survive. |
Why do fish farms have low biodiversity in comp to lakes? | -existed a shorter time -In the absence of predators, some fish species thrive while other don't. -Fewer diseases so results in too much of certain species. |
Habitat | Is part of a physical environment, where an animal or plant lives. An organisms adapts to it so are limited to only living there. |
Community | Total number of individuals from the different populations of plants and animals that live in a habitat at once. |
Population | Total no of individuals of the same species at one time. |
why are ecosystems self supporting? | provide their own mates , shelter but only rely on energy source, sun and producers at the bottom of the food chain. |
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