Across
- 2. The totality of an organism’s adaptations, its use of resources, and the lifestyle to which it is fitted. The role an organism plays in the ecosystem, different for every species.
- 6. an event that drastically reduces the size of a population.
- 7. Appear first when the ground is still bare rock or bare soil after a disturbance, characterized
- 10. The degree of variation
- 12. human impact/done by humans, not natural
- 13. Goods that come from natural resources or services/functions that ecosystems carry out that have measurable economic/financial value to humans.
- 14. study of the loss of Earth’s biologicaldiversity and the ways to prevent loss
- 15. Appear last, after soil is deepened and enriched with nutrients by cycle of growth and death by early and mid successional species,
- 16. the process by which a large expanse of natural habitat is transformed into a number of smaller isolated patches of smaller area, bad for ecosystem because edges are more dangerous, more invasive species
- 18. unpredictable(earthquakes and volcanic eruptions)
- 20. All populations have some, or variability in genomes of individuals; crossing over in parent chromosomes creates new combinations of genes(and therefore traits)
- 22. Any environmental resource that, because of its scarce or unfavorable levels, restricts the ecological niche of an organism
- 25. The study of ecological relationships and community structures on islands.
- 27. the reduction in the amount of space where a particular species can survive and reproduce
- 28. Frequency is sometimes unpredictable, overall idea in large time frame(fires/hurricanes)
- 29. Range where the organism will die, ex. Thermal shock, lack of oxygen/food/water, suffocation,
- 30. Any factor that controls population growth, lack of space/food
- 32. an organism that helps define an entire ecosystem.
- 33. the identification by humans of desirable traits in plants and animals, and the steps taken to enhance and perpetuate those traits in future generations.
- 35. Individuals with adaptations pass them onto offspring and individuals without adaptation die off, which leads to entire population having adaptation over time
- 36. Starts with already established soil in an area where a disturbance (human or natural) cleared out most of plant life.
- 37. areas with a lot of biodiversity
- 38. an animal leaves its home because the habitat is no longer ideal for them and they need to find a more suitable environment.
- 39. Organisms that are better adapted to their environment survive and produce more offspring
- 40. Competition within a species over a resource like food or shelter, limits population
- 41. an org whose presence/absence/abundance reflects a specific environmental condition.
- 42. Species diversity may be greatest in an area where disturbances are moderate in frequency and severity. (Too much kills off too many organisms, too little and the ecosystem is mostly specialists, not a lot of diversity) and disturbances can have positive effects (tree falling creates habitats, fires release nutrients)
Down
- 1. the current geological age. the period in which human activity has been the dominant influence on the environment/climate change.
- 2. the number of different habitats available in a given area
- 3. Diversity of life forms in an ecosystem; measured on three different levels (genetic, species, habitat)
- 4. Competition between different species over a resource like food or shelter, limits population
- 5. The ratio of deaths in an area to the population of that area; expressed per 1000 per year.
- 8. A random mistake in that happens when copying genetic code(DNA), create new traits
- 9. an area of habitat connecting wildlife populations separated by human activities/creations
- 11. an animal establishes a home in a habitat because it has resources it can utilize or because the habitat is ideal for them.
- 17. Starts from bare rock in an area with no previous soil formation.
- 19. single species rapidly evolving into several new species to use different resources and reduce competition
- 21. Range of conditions such as temp, salinity, pH, and sunlight, that an organism can endure before injury or death results
- 23. the complete disappearance of a species from Earth.
- 24. A species in danger of becoming endangered in the near future
- 26. (predictable/regular), always going to happen(seasonal rains)
- 31. organisms that can survive with a wide range of conditions/niches. More likely to be able to immigrate to islands and survive disturbances/1st to repopulate. More likely to be invasive. Mostly omnivores (rabbits, rats)
- 34. (r) is the total number of different species in an ecosystem
- 36. orgs that require specific environmental conditions/niches. ie. panda/koala. Unlikely threat to be invasive