Across
- 1. community of organisms resists change and remains stable despite the disturbance
- 7. scientists who classify species using an organism’s physical appearance and genetic makeup
- 8. the division of the habitat into smaller pieces → greatest cause of biodiversity loss today
- 12. extreme weather increase stress on populations
- 16. can push native species towards extinction
- 19. an area that both supports an especially high number of endemic species and is rapidly losing biodiversity
- 20. individual distinction among many species due to genetic variance
- 21. the number or variety of species in a given area
Down
- 2. the disappearance of a particular population from a given area, but not of the entire species globally
- 3. environmentally responsible travel to protected natural areas for the purpose of appreciating nature, promoting conservation, and providing economic benefit to local people
- 4. illegal capture or killing of an organism
- 5. passed in 1973; forbid government and citizens from harming listed endangered and threatened species or their habitats
- 6. the general increase in species richness toward the equator
- 9. likely to become endangered soon
- 10. process of breeding and raising organisms in controlled conditions → program called ssp → species survival plan
- 11. when extinction rates have been far above the normal background rate (+65%)
- 13. at serious risk of extinction
- 14. a community changes in response to a disturbance, but later returns to its original state
- 15. happens when humans hunt, fish, or harvest a species faster than it can replenish its population
- 17. the population of organisms that have genetically based characteristics such as size or color that differ from members of the same species in a different area
- 18. heavy metals, fertilizers, pesticides and toxic chemicals can poison people and wildlife