FORESTRY
ECOLOGY AND ENVIRONMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A native (naturally found) species which are added to an area.
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A non-native (not naturally found) species added to an area.
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A keystone species in an environment
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none of the above
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Detailed explanation-1: -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.
Detailed explanation-2: -An alien or non-native species is one that has been intentionally or accidentally transported and released into an environment outside of its historic or resident geographical range or habitat. Such species are described as ‘invasive’ if they are ecologically and/or economically harmful.
Detailed explanation-3: -Invasive species are organisms that are introduced to an area where they are not known to occur. They may be a virus, bacteria, insect, plant, or weed, etc.
Detailed explanation-4: -Solution: Doob grass or Cynodon is not an invasive species. Carrot grass, water hyacinth and Lantana are invasive species that pose threat to indigenous species from Indian context.