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Biodiversity
Envi Test 2
| Term | Definition |
|---|---|
| Prokaryotic Cell | bacteria, enclosed by membrane, no nucleus, have DNA |
| Eukaryotic Cell | all other life besides bacteria, enclosed by membrane, nucleus, specialized internal structures |
| 3 Domains | bacteria, archaea, eukarya |
| 6 Kingdoms | eubacteria, archaebacteria, protista, fungi, plantae, animalia |
| Order of Taxonomic Classification | domain, kingdom, phylum, class, order, family, genus, species |
| Species Diversity | the number and abundance of the different kinds of species living in an ecosystem |
| Species Richness | the number of different species in a community |
| Species Evenness | a measure of the comparative abundance in an ecosystem, roughly equal numbers of individuals within each species |
| Where do we see high Species Diversity? | tropical areas, coral reefs, ocean bottom zones |
| What is Genetic Diversity and why is it good? | variety of genes within a population or in a species, it gives a greater chance of surviving and adapting within an environment |
| Major Biomes | tropical forests, savanna, temperate grasslands, desert, scrublands, temperate forest, conifer forest, and tundra |
| Ecological Niche | the total use of biotic and abiotic resources for a species in its environment, includes water, sunlight, space, what it feeds on, how it reproduces, temperatures and conditions it can tolerate |
| Habitat | place or type of ecosystem where a species lives and obtains what it needs to survive |
| Generalist | broad niches, can live in many different places, eat anything, tolerate wide range of conditions, Ex: flies, cockroaches, coyotes, humans |
| Specialist | narrow niches, more prone to extinction, Ex: panda |
| Native Species | naturally occur in a region where they evolved |
| Nonnative Species | species that migrate or are introduced accidentally or deliberately into an ecosystem - not all are invasive |
| Invasive Species | a species that causes ecological or economic harm to a new environment where it is not native |
| Non-Invasive but Non-Native Species | honey bees |
| Indicator Species | provide early warning of changes in environmental conditions, their presence, absence, or abundance provides information on the health of an ecosystem |
| Keystone Species | has a large effect on the types and abundance of other species in an ecosystem, usually relative to the size of their population |
| What is the result of the loss of a Keystone Species? | population crashes and extinctions |
| Yellowstone National Park Wolf Reintroduction Summary | - wolves were exterminated from the park, elk populations rise - elk population rises caused vegetation decreases - wolves are reintroduced to the park, elk populations decrease - vegetations increases, aspen trees also increase, trees not grow taller |
| Trophic Cascade | when top consumers reduce the biomass of the next trophic level and this reduction cascades down the food chain |
Created by:
victoriabrotschol
Popular Ecology sets