Environmental Engineering Reference
In-Depth Information
Figure 23.10
Two ecosystems of strikingly different
complexity. The simple blackbird case (a) is vulnerable to
collapse if one component is adversely affected; the estuary
ecosystem (b) is likely to survive the loss of one component.
Source: After Woodwell (1967).
Plate 23.2
A beluga whale is the only whale to live the whole
year round in Arctic waters. Tagging and satellite tracking
enable scientists to map their migration routes, calving areas
and feeding grounds. Such knowledge enables conservation
to be planned in an appropriate manner.
Photo: Ken Atkinson.
