Biodiversity — Flashcards

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Biodiversity is the variety of life on Earth. It includes the variety within species, between species, and in ecosystems.

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Habitat loss destroys the natural place where organisms live. When forests, wetlands, or grasslands are removed, species lose food, shelter, and space. This is one of the greatest threats to biodivers…

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Overharvesting means taking too many animals, fish, plants, or other natural resources from nature. Over-hunting, over-fishing, and over-collecting can quickly reduce populations and push species towa…

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Exotic species can replace native species and disturb the natural balance. They may compete for food, space, and other resources, which can lead to the decline or extinction of local species.

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Pollution can cause damage that living systems may not recover from quickly. Climate change can alter rainfall, temperature, and habitat conditions. Species that cannot adapt fast enough may disappear…

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Biodiversity decreases because the original habitat is lost. Many plants and animals lose shelter and food. Soil can also become loose, leading to erosion and further damage to the ecosystem.

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This is habitat loss. Wetlands are important homes for many organisms, including birds and aquatic life. When the wetland is drained, many species lose their living space.

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Human activities reducing biodiversity began about 30,000 years ago when social and language skills improved and better stone tools were used to trap and kill larger animals. Later, growing human need…