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What is the leading contributor to the extinction rates of terrestrial and freshwater organisms?
currents, turbulence of fast-moving rivers and streams. :)
What is a Diversification Rates?
Rate at which new lineages/taxa originate - Changes in diversity over time - "Taxonomic Rates": diversification and extinction rates.
How does the rate of extinction today compare to the rates in the past?
they are much lower
How do biologists estimate extinction rates?
Biologists estimate extinction rates by monitoring population sizes, habitat loss, and factors affecting species survival such as climate change and human activities. They use mathematical models to predict future extinction probabilities based on current trends. Additionally, researchers collect data on species declines and the rate of biodiversity loss over time to assess and quantify extinction rates at a global scale.
What is mass depletions?
Mass depletion is an event in which extinction rates are higher than normal but not high enough to be classified as a mass extinction.
How have extinction rates changed over time?
Extinction rates have varied throughout history, with some periods experiencing increased rates due to factors like natural events and changes in climate. However, human activity in recent times has accelerated extinction rates significantly, leading to a current global crisis of biodiversity loss. Efforts are being made to combat this trend and protect endangered species.
What is a diversification?
Rate at which new lineages/taxa originate - Changes in diversity over time - "Taxonomic Rates": diversification and extinction rates.
Why do you think extinction rates for fresh water animals are 6 times higher?
Extinction rates for fresh water animals are 6 times higher because of the changes in sea levels and currents as well as gases due to volcanic activity.
What is the relationship between environmental change speciation mass extinction?
Environmental changes can stimulate speciation by creating new opportunities for organisms to evolve and adapt to new conditions. However, rapid and extreme environmental changes, such as those associated with mass extinctions, can lead to widespread species loss and disruption of ecosystems, accelerating the extinction rates.
What is one important abiotic factor in freshwater ecosystems?
One important abiotic factor in freshwater ecosystems is temperature. Temperature influences the metabolic rates of organisms, as well as the solubility of gases and nutrients in water. Changes in temperature can have significant impacts on the overall health and biodiversity of a freshwater ecosystem.
What happens to a population or organisms when limiting factors needed for the organisms to survive are not ideal?
When limiting factors are not ideal, the population may face increased competition for resources, reduced reproductive rates, lower survival rates, and ultimately decline in numbers. This can lead to stress, decrease in genetic diversity, and potential extinction if the conditions persist.
What are some reasons for the acceleration in extinction rates in recent decades?
Some reasons for the acceleration in extinction rates in recent decades include habitat destruction, climate change, pollution, and human activities such as overexploitation of resources and introduction of invasive species. These factors have disrupted ecosystems and pushed many species towards extinction at an alarming rate.
