Human Impact 2019

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What is genetic drift via bottleneck effect?

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Genetic drift via bottleneck effect occurs when a population's size is significantly reduced for at least one generation, leading to a loss of genetic diversity. This can happen due to events like natural disasters or human activities.

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What is the impact of desalination on ocean environments?

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Desalination can alter ocean salt levels, potentially causing loss of species and unbalanced populations in marine food webs due to changes in salinity.

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Why is biodiversity important in ecosystems?

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Biodiversity increases the chance that some organisms will survive major environmental changes, contributing to ecosystem resilience.

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What factors should be considered when leasing land for strip mining?

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Factors include the threat to local biodiversity, management of the land post-mining, potential job creation, and increased traffic.

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How does biodiversity affect resistance to invasive species?

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Areas with higher biodiversity are generally more resistant to invasive species, as diverse ecosystems can better withstand and adapt to changes.

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What is gene flow?

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Gene flow is the transfer of genetic material between populations, which can increase genetic diversity and reduce differences between populations.

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What is the founder's effect?

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The founder's effect is a form of genetic drift that occurs when a small group of individuals establishes a new population, leading to reduced genetic variation.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What are the consequences of habitat destruction?

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Habitat destruction can lead to loss of biodiversity, extinction of species, and disruption of ecosystem services.

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What is an invasive species?

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An invasive species is a non-native organism that, when introduced to a new environment, can cause harm to native species and ecosystems.