Ecosystems Flashcards

(11 cards)

1
Q

What is dispersal?

A

The movement of individuals (or their propagules, such as seeds, spores, or larvae) away from their place of origin

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2
Q

What are pioneer species?

A

Good at dispersal
* Grow fast
* Short lived
* Thrive in poor/absent soils
* Help build soils

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3
Q

What are Intermediate species?

A
  • Require some soil nutrients
  • Grow moderately fast and
    moderately high
  • Moderate lifespan
  • Moderate dispersal
  • Help build soils more
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4
Q

What are climax community species?

A
  • Slow dispersal
  • Grow slowly but get very tall
  • Long lived
  • Require rich soils
  • Great competitors
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5
Q

What is Succession?

A

The process by which the community of species in an area changes over time.”

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6
Q

What are pools?

A

Pools are storage compartments or reservoirs

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6
Q

What are fluxes?

A

Fluxes are exchanges between pools (inputs & outputs). Its almost the rate a substance moves.

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7
Q

What drives succession over time?

A

Dispersal and competition

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8
Q

What is runoff?

A

The movement of water over the land surface and into bodies of water such as rivers, lakes, and oceans.

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9
Q

What is percolation/infiltration ?

A

The process by which water seeps into the soil downward through pores and fractures.

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10
Q

What is a dead zone?

A

A region of oxygen-free (anoxic) ocean water created by a chain of events that starts with over-fertilization with nitrogen.

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