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Flashcards in monitoring change Deck (10):
1

name two examples of chemical inputs into the marine environment

oil spills

runoff

2

name five examples of human impacts on the environment

-fishing (trawling)

-dredging/mining (e.g. Tauranga harbour)

-terrestrial runoff (important stressor in NZ)

-nutrient loading (causing algal blooms, eutrophication)

-organic enrichment (e.g. salmon farms)

 

3

What changes following a disturbance?

-Loss of some or all members of the community

-near-bed hydrodynamics (removal of biogenetic structure, alteration of channel flow)

-food supply (increase if there is organic loading, decrease if the surface organic layer is removed)

-chemical gradients (RPD disturbed)

-sediment grain size (smaller or larger dependent on dusturbance)

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4

describe macrofaunal succession 

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5

how is the population growth rate related to the frequency of disturbance?

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6

display the impacts of multiple impacts comparing stable and unstable assemblage

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7

what are three potential problems when detecting impacts?

•Many populations sustained by recruits from elsewhere so loss of a species may not be indicative of environmental degradation

•Substantial natural variation in time and space which must be assessed

•Ensuring adequate sampling effort to be certain a species is not present (see previous lecture)

8

describe a survey design to detect impacts

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9

describe the function of a ABC curve

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10