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- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_2e_(OpenStax)/08%3A_Unit_VIII-_Ecology/8.04%3A_Conservation_Biology_and_Biodiversity/8.4.02%3A_The_Biodiversity_CrisisScientists generally accept that the term biodiversity describes the number and kinds of species in a location or on the planet. Species can be difficult to define, but most biologists still feel comf...Scientists generally accept that the term biodiversity describes the number and kinds of species in a location or on the planet. Species can be difficult to define, but most biologists still feel comfortable with the concept and are able to identify and count eukaryotic species in most contexts. Biologists have also identified alternate measures of biodiversity, some of which are important for planning how to preserve biodiversity.
- https://bio.libretexts.org/Courses/Fresno_City_College/Introduction_to_Conservation_Biology/12%3A_Extinction/12.02%3A_History_of_ExtinctionExtinction is the global loss of a species. Five mass extinctions have occurred in geological history, and extinction rates were particular high during these events. Earth is currently experiencing a ...Extinction is the global loss of a species. Five mass extinctions have occurred in geological history, and extinction rates were particular high during these events. Earth is currently experiencing a sixth mass extinction, which is driven by human activities. When mass extinctions are not occurring, extinction still occurs at a low rate, the background extinction rate. The local elimination of a species (extirpation) is also of conservation concern.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_10%3A_Population_modeling/10.4%3A_Projecting_population_growthOnce the population growth rate of a population has been estimated we can predict how the population will change in the future. This is called projecting the population into the future and is a key s...Once the population growth rate of a population has been estimated we can predict how the population will change in the future. This is called projecting the population into the future and is a key step in population analysis for understanding the prospects of a population to increase, decrease, or even go extinct.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/23%3A_Conservation_Biology/23.02%3A__Biodiversity_Loss_over_timeThe biologists studying cichlids in the 1980s discovered hundreds of cichlid species representing a variety of specializations to particular habitat types and specific feeding strategies: eating plank...The biologists studying cichlids in the 1980s discovered hundreds of cichlid species representing a variety of specializations to particular habitat types and specific feeding strategies: eating plankton floating in the water, scraping and then eating algae from rocks, eating insect larvae from the bottom, and eating the eggs of other species of cichlid.
- https://bio.libretexts.org/Courses/Monterey_Peninsula_College/Raskoff_Environmental_Science/05%3A_Biodiversity_and_Conservation/5.02%3A_Importance_of_BiodiversityBiodiversity exists at multiple levels of organization, and is measured in different ways depending on the goals of those taking the measurements. These include numbers of species, genetic diversity, ...Biodiversity exists at multiple levels of organization, and is measured in different ways depending on the goals of those taking the measurements. These include numbers of species, genetic diversity, chemical diversity, and ecosystem diversity. The number of described species is estimated to be 1.5 million with about 17,000 new species being described each year. Estimates for the total number of eukaryotic species on Earth vary but are on the order of 10 million.
- https://bio.libretexts.org/Courses/Monterey_Peninsula_College/Raskoff_Environmental_Science/05%3A_Biodiversity_and_ConservationThis chapter discusses biodiversity's significance, threats, preservation methods, geological changes, current extinction events, and conservation efforts, highlighting its crucial role in ecosystems ...This chapter discusses biodiversity's significance, threats, preservation methods, geological changes, current extinction events, and conservation efforts, highlighting its crucial role in ecosystems and the necessity for protection and sustainability.
- https://bio.libretexts.org/Courses/Prince_Georges_Community_College/BIO-1110_(Environmental_Biology)_OER_Textbook/02%3A_Ecological_Systems/2.02%3A_Chapter_7_-_Conservation/7.04%3A_ExtinctionExtinction (the complete disappearance of a species from Earth) is an important part of the evolution of life on Earth. The current diversity of species is a product of the processes of extinction and...Extinction (the complete disappearance of a species from Earth) is an important part of the evolution of life on Earth. The current diversity of species is a product of the processes of extinction and speciation throughout the previous 3.8 billion year history of life. There might be 40 million species alive today, but between 5 and 50 billion species have lived at some time during the history of the Earth.
- https://bio.libretexts.org/Courses/Norco_College/Principles_of_Ecology/08%3A_Conservation_Biology_and_Biodiversity/8.02%3A_The_Biodiversity_CrisisScientists generally accept that the term biodiversity describes the number and kinds of species in a location or on the planet. Species can be difficult to define, but most biologists still feel comf...Scientists generally accept that the term biodiversity describes the number and kinds of species in a location or on the planet. Species can be difficult to define, but most biologists still feel comfortable with the concept and are able to identify and count eukaryotic species in most contexts. Biologists have also identified alternate measures of biodiversity, some of which are important for planning how to preserve biodiversity.
- https://bio.libretexts.org/Courses/Monterey_Peninsula_College/Raskoff_Environmental_Science/05%3A_Biodiversity_and_Conservation/5.03%3A_Threats_to_BiodiversityThis page discusses the severe threats to global biodiversity resulting from human population growth and resource consumption, including habitat loss, overharvesting, and invasive species introduction...This page discusses the severe threats to global biodiversity resulting from human population growth and resource consumption, including habitat loss, overharvesting, and invasive species introductions. Climate change exacerbates these issues by altering habitats and species distributions, significantly increasing extinction risks by 2050.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Principles_of_Biology/03%3A_Chapter_3/27%3A_Conservation_Biology_and_Biodiversity/27.01%3A_The_Biodiversity_CrisisThe biologists studying cichlids in the 1980s discovered hundreds of cichlid species representing a variety of specializations to particular habitat types and specific feeding strategies: eating plank...The biologists studying cichlids in the 1980s discovered hundreds of cichlid species representing a variety of specializations to particular habitat types and specific feeding strategies: eating plankton floating in the water, scraping and then eating algae from rocks, eating insect larvae from the bottom, and eating the eggs of other species of cichlid.
- https://bio.libretexts.org/Courses/Evergreen_Valley_College/Introduction_to_Ecology_(Kappus)/12%3A_Biodiversity_and_The_Extinction_Crisis/12.03%3A_ExtinctionExtinction is the global loss of a species. Five mass extinctions have occurred in geological history, and extinction rates were particular high during these events. Earth is currently experiencing a ...Extinction is the global loss of a species. Five mass extinctions have occurred in geological history, and extinction rates were particular high during these events. Earth is currently experiencing a sixth mass extinction, which is driven by human activities. When mass extinctions are not occurring, extinction still occurs at a low rate, the background extinction rate. The local elimination of a species (extirpation) is also of conservation concern.
