How do exotic species threaten ecosystems quizlet?
Explain how exotic species threaten ecosystems. Exotic species can threaten native species that have no natural defenses against them. They can end up taking over and ruin the natural function of an ecosystem.
Why are exotic or invasive species a threat to biodiversity quizlet?
Because invasive species generally do not have predators and have unlimited resources in their new habitat, they hurt stable ecosystems.
How do invasive species affect biodiversity quizlet?
They do not naturally inhabit the ecosystem. Introduced species that can dramatically change or destroy ecosystems. Rapid spread of invasive species is a major couse of global biodiversity loss. Introduced species can affect native species through competition, predation, disease, parasitism, and habitat alteration.
What is an exotic species How do exotic species harm biodiversity?
Alien species have been moved by humans to areas outside of their native ranges. Exotic species threaten biodiversity by (1) causing disease, (2) acting as predators or parasites, (3) acting as competitors, (4) altering habitat, or (5) hybridizing with local species.
How does invasion of exotic species affect biodiversity?
Invasive alien species have devastating impacts on native biota, causing decline or even extinctions of native species, and negatively affecting ecosystems. … They reproduce rapidly, out-compete native species for food, water and space, and are one of the main causes of global biodiversity loss.
How do introduced species damage ecosystems quizlet?
Some introduced species can be invasive and can destroy ecosystems. These species reproduce rapidly and are often aggressive. Lacking natural predators, they easily outcompete native species and alter habitats.
How does biodiversity loss affect crop diversity?
Loss of biodiversity will impact the number of pharmaceuticals available to humans. Crop diversity is a requirement for food security, and it is being lost. … Loss of biodiversity threatens these ecosystem services and risks making food production more expensive or impossible.
What effect does the introduction of exotic species have on native species?
Invasive species can lead to the extinction of native plants and animals, destroy biodiversity, and permanently alter habitats through both direct and indirect effects. This can result in huge economic impacts and fundamental disruptions of aquatic and terrestrial ecosystems.
What are threats to biodiversity quizlet?
Habitat destruction, habitat fragmentation, habitat degradation (pollution), global climate change, and overexploitation. The result of expansion of human activities and the primary cause of loss of biological diversity. You just studied 13 terms!
How can Introduced species disrupt ecosystems?
When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. It can breed and spread quickly, taking over an area. … Invasive species can change the food web in an ecosystem by destroying or replacing native food sources.
Why are invasive species an issue quizlet?
Invasive species can make a natural habitat unsuitable for native species by changing its structure or composition. This may mean changed light levels, altered soil chemistry, or increased soil erosion. They can also upset the balance of nutrient cycling, pollination, and energy flow.
What is species diversity quizlet?
Species diversity. The number of different species and the number of individuals of each species within a community. Genetic diversity. The variety of genes possessed by the individuals that make up any one species.
Why are invasive species a problem for ecosystems?
Invasive species are harmful to our natural resources (fish, wildlife, plants and overall ecosystem health) because they disrupt natural communities and ecological processes. … The invasive species can outcompete the native species for food and habitats and sometimes even cause their extinction.