Keystone and Invasive Species

What are keystone species?

• Species that have no impact on their ecosystem.

• Species that are not important for maintaining ecosystem balance.

• Species that have a large impact on their ecosystem relative to their abundance.

• Species that are only found in one specific ecosystem.

Name an example of a keystone species and explain its ecological impact.

• Sea otter

• Jellyfish

• Penguin

• Sea lion

How do keystone species affect the biodiversity of an ecosystem?

• Keystone species decrease the biodiversity of an ecosystem.

• Keystone species increase the biodiversity of an ecosystem.

• Keystone species have no effect on the biodiversity of an ecosystem.

• Keystone species help regulate the biodiversity of an ecosystem.

What happens to an ecosystem if a keystone species is removed?

• The ecosystem becomes more stable and gains biodiversity.

• The ecosystem remains unchanged.

• The ecosystem becomes more vulnerable to disturbances.

• The ecosystem becomes less stable and loses biodiversity.

Define invasive species.

• A native species that causes harm to the environment, economy, or human health.

• A non-native species that benefits the environment, economy, or human health.

• A non-native species that has no impact on the environment, economy, or human health.

• A non-native species that causes harm to the environment, economy, or human health.

What are some negative effects of invasive species on ecosystems?

• Competition with native species for resources, predation on native species, alteration of habitat, and disruption of ecological processes.

• Stabilization of ecological processes, facilitation of resource availability, restoration of natural balance

• Enhancement of native species populations, promotion of biodiversity, improvement of habitat quality

• Protection of native species from predators, enhancement of ecosystem resilience, promotion of species coexistence

How do invasive species outcompete native species?

• Invasive species are less adaptable to new environments.

• Invasive species have weaker competition from native species.

• Invasive species have advantages such as rapid reproduction, lack of natural predators, ability to adapt to new environments, and aggressive behavior.

• Invasive species have fewer advantages compared to native species.

What are some strategies to control invasive species?

• Prevention, early detection and rapid response, mechanical control, chemical control, biological control, and habitat restoration.

• Using only chemical control methods

• Introducing more invasive species to control the existing ones

• Ignoring the presence of invasive species

Explain the concept of ecological succession and how invasive species can disrupt it.

• Invasive species can disrupt ecological succession by outcompeting native species, altering the physical environment, and disrupting the natural balance of the ecosystem.

• Invasive species have no impact on ecological succession.

• Invasive species can enhance ecological succession by providing new resources.

• Ecological succession is a process that only occurs in aquatic ecosystems.

Why is it important to manage and control invasive species?

• To save money by not investing in invasive species management.

• To disrupt the natural order and create chaos in ecosystems.

• To protect native species and maintain the balance of ecosystems.

• To promote the growth of invasive species and increase biodiversity.