Figure 2.21. North American coastal ecosystems threatened by development.

Source:

Bryant, D., et al. (1995).

Notes:

a. Threat ranking depicts potential risk to coastal ecosystems from development-related activities.
b. Coastal areas falling within a city or major port footprint or having a population density exceeding 150 persons per square kilometre, a road network density exceeding 150 metres of road per square kilometre, or a pipeline density exceeding 10 metres of pipeline per square kilometre.
c. Coastal areas with a population density of between 75 and 150 persons per square kilometre, a road network density of between 100 and 150 metres of road per square kilometre, or a pipeline density of between 0 and 10 metres of pipeline per square kilometre.
d. Coastal areas with a population of less than 75 persons per square kilometre, a road network density of less than 100 metres of road per square kilometre, and no pipelines known to be present.