Biology unit 9

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Across
  1. 2. created from a mutualistic symbiotic relationship between a plant and a fungus - often the pioneer species in primary succession
  2. 7. when human populations become so large they are not able to be supported by ecosystems - populations are higher than carrying capacity
  3. 8. aquatic regions that do not have sunlight, unable to support photosynthesis
  4. 9. predictable changes in an ecosystem as it progresses from pioneer species on bare rock to a mature climax community - starts with no soil
  5. 10. visual representation of the feeding interactions in ecosystems - helps show interconnectedness among species
  6. 14. land ecosystems characterized by average temperature and precipitation
  7. 16. clearing forested land and repurposing it for non-forest use like agriculture, or urban development
  8. 17. species that evolve and are only found in one isolated geographic location - ex: marsupials in australia
  9. 18. non-native species in a community, often able to outcompete endemic species because they are removed from the limiting factors they evolved with
  10. 19. aquatic regions where sunlight penetrates, able to support photosynthesis
  11. 20. mature form of an ecosystem, end result of biological succession
Down
  1. 1. key organisms in an ecosystem that help stabilize or maintain that ecosystem - ex wolves in yellowstone
  2. 3. biomes where fresh and saltwater meet - typically very productive areas due to influx of nutrients from terrestrial ecosystems
  3. 4. pockets ecosystems at the bottom of the ocean near divergent plate boundaries - producers in this ecosystem use chemosynthesis
  4. 5. measurement of the variety and richness of an ecosystem, measured in part by species richness, species evenness, and endemic species
  5. 6. long term changes in average global temperatures causes changes in weather patterns - human interactions with ecosystems have accelerated this process
  6. 11. collection of ecosystems characterized with similar temperatures, rainfall totals, and climax communities
  7. 12. water ecosystems characterized by light availability, water depth, and salinity
  8. 13. first species to invade or populate an area, typically a lichen in primary succession
  9. 15. predictable changes in an ecosystem after a disturbance as it progresses toward reestablishing a mature climax community - some soil already exists