science

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Author:
pinklover925
ID:
42260
Filename:
science
Updated:
2010-10-14 21:10:52
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science
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science
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  1. watershed
    All of the land that drains into the river
  2. floodplain
    the flat land next to a river that is covered with water during floods
  3. tributary
    a small stream that runs into a larger one
  4. point pollution
    • pollution that can be tracked
    • Ex:factory stacks, pipes
  5. non-point pollution
    • can not be tracked
    • Ex:runoff, storm sewers,fertilizers
  6. benthic macroinvertebrates
    • insects on the bottom of the creek
    • short life cycle
    • easy to catch and identify
    • sensitive to polluntion
  7. trophic level
    • omnivore-plants, eat decaying plant
    • herbivore-scrape algae off rocks
    • carnivore -eat other benthics
  8. taxa
    level of sensitivity to pollution
  9. population
    a single species living in one place at a time
  10. carrying capacity
    population size that environment can support
  11. density-dependent factors
    • resoures that are used up faster if population is large
    • Ex:predation,disease,shelter,water and food
  12. density-independent factors
    • are not affected by population density
    • Ex:weather and climate
  13. r-strategists
    • often in rapidly changing environments
    • small
    • rproduce rapidly
    • short life
    • many off spring
  14. k-strategists
    • grow slow
    • small population
    • long life
    • reproduce late
  15. community
    many different species that live together
  16. ecosystem
    a community and all the non-living parts or habitat
  17. sedimentation
    dirt,clay
  18. Erosion
    when sediment falls off the vanks into tream
  19. embededdness
    how far rocks are in ground
    • DRAGONFLY
    • predator
    • taza 2
    • scoop-like lower jaw
    • flattened head
    • no tail appendages
    • DAMSELFLY
    • predator
    • taxa 2
    • 3 leaf-shaped tail appendages
    • MAYFLY
    • 3 tail appendages
    • live in clear streams
    • taxa 1
    • make the M with your hand
    • CADDISFLY
    • many make cases out of rocks/leaves
    • we see the one without the case
    • taxt 2
    • hard head capsule
    • MIDGE LARVA
    • C-shaped
    • taxa 3
    • lives in low qality streams
    • BLACK FLY LARVA
    • lower end of body is wider than the head
    • taxa 3
    • SOWBUG
    • long antennae
    • many legs
    • vertically flat
    • taxa 2
    • SCUD
    • many legs
    • horizantally flat
    • taxa 2
    • CRAYFISH
    • claws
    • resembles small lobster
    • taxa 2
    • WATER STRIDER
    • not a benthic
    • lives on the surface of hte water
    • LEECH
    • segmented body
    • large sucker on both ends
    • taxa 3
    • RIFFLE BEETLE
    • small bug with wings
    • taxa 1
    • SNAIL
    • hard shell
    • left hand opening=pouch snail
    • right hand opening=gilled snail
    • WATER PENNY
    • flat saucer
    • 6 legs
    • taxa 1
    • CRANE FLY
    • plump like a caterpillar
    • taxa 2
    • WATER BOATMAN
    • not a benthic
    • walks on the water

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