Across
- 2. an area that contains a high proportion of all the species found on Earth
- 3. the limits to the abiotic conditions that species can tolerate
- 5. no regular frequency
- 9. the number of species in a region or in a particular type of habitat
- 12. a species that spreads rapidly across large areas
- 16. different kinds of life in one area
- 17. a change in the genetic composition of a population over time.
- 18. goods/products directly provided to humans for sale/use by ecosystems; goods/products are made from natural resources that ecoystems provide
- 23. measure of biodiversity, based on phylogeny (the tree of life)
- 24. the branch of biology that deals with the geographical distribution of plants and animals.
- 25. a trait that improves an individual's fitness
- 26. the change in either species composition, structure, or architecture of vegetation through time.
- 27. the base level for measuring elevation and depth on Earth.
- 29. the succession of plant life that occurs in areas that have been disturbed but have not lost their soil.
- 30. animals that acquire very unique resources
- 32. the processes by which life-supporting resources such as clean water, timber, fisheries, and agricultural crops are produced
- 33. derived from human activities
- 35. occasional events with irregular frequency
- 38. dissolved salt content in a body of water
- 39. revenue from recreational activities and profits from scientific discoveries made in ecosystem
- 42. a species that plays a far more important role in its community than its relative abundance might suggest
- 44. the result of two populations within a species evolving separately to the point that they can no longer interbreed and produce viable offspring
- 45. a random change in the genetic code produced by a mistake in the copying process
- 46. the number of species in a given area
Down
- 1. a resource that a population cannot live without and that occurs in quantities lower than the population would require to increase in size.
- 4. organisms that do not occur naturally in an area, but are introduced as the result of deliberate or accidental human activities.
- 6. an individual's ability to survive and reproduce
- 7. the genetic process by which one chromosome breaks off and attaches to another chromosome during reproductive cell division
- 8. species that live in their historical range, typically where they have lived for thousands or millions of years.
- 10. an event, caused by physical, chemical, or biological agents, resulting in changes in population size or community composition
- 11. process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest.
- 13. the diversity of life forms in an environment
- 14. all of the populations of organisms within a given area
- 15. ecological succession occurring on surfaces that are initially devoid of soil
- 19. the average weather that occurs in a given region over a long period of time
- 20. a measure of the genetic variation among individuals in a population
- 21. Species that can live in many different types of environments, and have a varied diet
- 22. physical separation of a group of individuals from others of the same species
- 28. Capacity of an organism to tolerate certain conditions or changes to its environment, due to physiological and morphological properties.
- 31. the evolution of new species
- 34. benefit provided by ecosystem processes that moderate natural conditions like climate change and air quality
- 36. natural ecosystems support processes we do ourselves making them less costly and easier for us
- 37. to move into or come to live in a region or community especially as part of a large-scale and continuing movement of population
- 40. occurs with regular frequency
- 41. an extended mass of ice formed from snow falling and accumulating over the years and moving very slowly
- 43. a particular location on Earth with interacting biotic and abiotic components