In:
Environmental Conservation, Cambridge University Press (CUP), Vol. 7, No. 4 ( 1980), p. 325-332
Abstract:
Since 1970 a large number of environmental problems have been identified as resulting from the long-term effects of human impacts. Consideration of human activity within the environment as three orders of impact, provides a basic framework for the appreciation and evaluation of long-term problems. Consequent upon dam construction, major changes of flood magnitude and frequency and of the quantity and calibre of sediment loads (first-order impacts), will induce the readjustment of channel morphology and ecology (second-order impacts). However, the macrophytic and macro-invertebrate population, for example, are also adjusted to channel morphology—particularly channel shape and substrate composition—so that further readjustments of the macrophyte and macro-invertebrate populations may be effected by changes of channel form (third-order impacts).
Type of Medium:
Online Resource
ISSN:
0376-8929
,
1469-4387
DOI:
10.1017/S0376892900008183
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
1980
detail.hit.zdb_id:
1470226-5
SSG:
12
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