ECOLOGY
ORGANISMS AND THE ENVIRONMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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false
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true
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Either A or B
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None of the above
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Detailed explanation-1: -For a species to become invasive, it must successfully out-compete native organisms for food and habitat, spread through its new environment, increase its population and harm ecosystems in its introduced range.
Detailed explanation-2: -Ecosystem productivity is a result of bio-diversity, which is understood as local species richness. Invasive species increase local species richness and, therefore, increase the conservation value of local ecosystems.
Detailed explanation-3: -Invasive species are primarily spread by human activities, often unintentionally. People, and the goods we use, travel around the world very quickly, and they often carry uninvited species with them. Ships can carry aquatic organisms in their ballast water, while smaller boats may carry them on their propellers.
Detailed explanation-4: -An invasive species is an organism that is not indigenous, or native, to a particular area. Invasive species can cause great economic and environmental harm to the new area. Not all non-native species are invasive.