Studied by 4 people
Define Biodiversity
Sure for biological diversity, is the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem.
What does the study of biodiversity starts with?
The unfinished task of cataloging all the species that exist on earth
What is the known number of species known to science?
1.9 million.
When are new species considered known?
Collected and described scientifically
Where do unknown species exist?
Remote wilderness, deep ocean, and even in cities
Define species diversity
Refers to all the differences between populations of species, as well as between different species
Define ecosystem diversity
Refers to the variety of habitats, communities, and ecological processes within and between ecosystems
Define genetic diversity
Refers to all the different genes contained within all members of a population
Define gene
Hey, segment of DNA that is located in a chromosome and that codes for a specific hereditary trait
What does biodiversity affect the stability of?
Ecosystems and sustainability of populations
Define Keystone species
A species that is critical to the functioning of the ecosystem in which it lives because it affects the survival and abundance of many other species in its community.
What happens when genetic variation increases?
The chances that some members of the population may survive environmental pressures or changes.
What happens when genetic variation decreases?
Population shrinks
What are prescribed drugs in the U.S. deprived from?
Plants as well as chemicals found in fungi
Define Hybrids
Crops developed by combining genetic material from other populations
Define Ecotourism
A form of tourism that supports the conservation and sustainable development of ecologically unique areas
Define Mass extinction
The extinction of many species in a relatively short period of time.
What is the cause of the current mass extinction?
Global Change in climate
What species are at risk of extinction?
Those that migrate
Define endangered species
A species that has been identified to be in danger of extinction throughout all or a significant part of its range and that is thus under protection by regulations or conservation measures.
Define Threatened Species
A species that has been identified to be likely to become endangered in the foreseeable future.
What are the major causes of extinction today?
Destruction of habitats, the introduction of nonnative species, pollution , and overharvesting of species
Define exotic species
A species that is not native to a particular region
What are other causes of extinctions?
Excessive Hunting
What are rare species harvested and sold for?
Pets, Houseplants, wood, food, or herbal medicine
Define Poaching
The illegal harvesting of fish, game, or other species.
What are some pollutants used by humans making their way into food webs around the globe?
Pesticides, cleaning agents, drugs, and other chemicals
Define endemic species
A species that is native to a particular place and that is found only there
What are tropical rainforest cleared for?
Farming and Cattle Grazing
What are coral reefs threatened by?
Human Activities such as, pollution, development along waterways, and overfishing
Define biodiversity hotspots
The most threatened areas of high species diversity on earth.
What are examples of a biodiversity hotspot?
Tropical Rainforest, Coastal Areas, and islands
What are some unique ecosystems in the U.S. ?
Florida Everglades, The California Coastal Region, Hawaii, the midwestern prairies, and the forest of the Pacific Northwest
What land plants are high in diversity?
Pine Trees and Sunflowers
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