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What are some specific types of human actions that threaten biodiversity and ecosystems?
Some specific types of human actions that threaten biodiversity and ecosystems include over-hunting/over-exploitation, habitat loss/degradation/fragmentation, deforestation, invasion of non-native species, pollution, climate change, and cultural impacts.
What is an invasive species?
An invasive species is an animal or plant from another region of the world that does not fit in their new environment and can lead to the extinction of native plants and animals, destroy biodiversity, and permanently alter habitats.
How can invasive species be introduced to an area?
Invasive species can be introduced to an area by ship ballast water, accidental release, and most often, by people.
When did scientists become aware of the deleterious effect of biological invasions on habitats and ecosystems?
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Who observed the phenomenon of non-native species as far back as the 18th century?
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How can invasive species be introduced to an area?
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What effect can invasive species have on habitats and ecosystems?
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What is the definition of invasive species?
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What are some specific types of human actions that threaten biodiversity and ecosystems?
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When did scientists become aware that biological invasions can have a deleterious effect on habitats and ecosystems?
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Study Notes
Threats to Biodiversity and Ecosystems
- Habitat destruction through urbanization, agriculture, and deforestation reduces living space for species.
- Pollution from industrial activities contaminates air, water, and soil, adversely affecting wildlife and plant life.
- Overexploitation, such as overfishing and poaching, leads to declines in specific species populations.
- Climate change alters habitat conditions, impacting ecosystems and species’ survival rates.
Invasive Species
- Defined as non-native species that, when introduced to a new habitat, cause harm to the environment, economy, or human health.
- Invasive species often outcompete native species for resources, disrupt local ecosystems, and can lead to native species extinction.
Introduction of Invasive Species
- Can occur through various means, including international trade, travel, and agriculture (e.g., accidental transport in cargo).
- Release from gardens or aquariums often introduces species to non-native habitats.
- Climate change may create more favorable conditions for invasive species to thrive in new areas.
Historical Awareness of Biological Invasions
- Scientists began recognizing the negative impacts of biological invasions in the 19th century.
- The phenomenon of non-native species was first observed by early naturalists in the 18th century, noting their impacts on local ecosystems.
Effects of Invasive Species
- Invasive species can drastically alter habitat structure, leading to diminished habitat complexity and diversity.
- They can introduce diseases to which native species have no resistance, further threatening biodiversity.
- Economic costs arise from controlling invasive species and lost ecosystem services provided by native species.
Summary of Invasive Species
- Invasive species pose a significant threat to biodiversity and ecosystems through competition, predation, and disease introduction.
- Awareness of these threats has developed over the centuries, leading to increased research and management efforts.
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Description
Learn about the specific human actions that threaten biodiversity and ecosystems, leading to the extinction of many species. Explore the impacts of over-hunting, habitat loss, deforestation, invasion of non-native species, pollution, climate change, and cultural influences.
