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Responses of estuaries to natural and ... - University of Hull

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atural fac<strong>to</strong>rs<br />

<strong>natural</strong> variation<br />

(noise)<br />

Physical<br />

system<br />

Physicochemical<br />

system<br />

The integral system<br />

Ecological<br />

system<br />

Biological<br />

system<br />

process<br />

structure<br />

Ecological quality:<br />

-absolute species numbers<br />

-diversity<br />

-community structure<br />

-l<strong>and</strong>scape<br />

Judgement <strong>of</strong> the environmental<br />

quality by the social community<br />

Consumer preferences<br />

(DEMAND)<br />

Judgement <strong>of</strong> the<br />

environmental quality by<br />

the social community<br />

Economic<br />

system<br />

(COST)<br />

Production possibilities<br />

Economic quality:<br />

(AVAILABILITY)<br />

Judgement <strong>of</strong> the<br />

economical quality by<br />

the social community<br />

Anthropogeni<br />

plans & activities<br />

de Jonge et al. 2003

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