APES Unit 2: The Living World: Biodiversity

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