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STATE OF THE ENVIRONMENT IN THE RAET NATIONAL MARINE PARK (SOUTHERN NORWAY)
Grading statements for the environmental
impact of marine-based industries.
This industry has caused no significant changes
in the overall environment (condition of habitat,
species, ecosystem processes or physical and
chemical processes) within its footprint.
This industry has caused some significant changes
in some components of the overall environment,
but not to the extent that they are significantly
affecting ecosystem functions.
This industry has caused substantial changes in
many components of the overall environment,
and these are significantly affecting ecosystem
functions in some areas of its spatial footprint.
This industry has caused substantial changes in
many components of the overall environment, and
these are seriously affecting ecosystem functions
across its spatial footprint.
Grading statements for pests, introduced
species, diseases and algal blooms.
The incidence and extent of diseases and algal
blooms are at expected natural levels, there are
insignificant occurrences or numbers of pests,
and the numbers and abundance of introduced
species is minimal.
Incidences of diseases or algal blooms occur
occasionally above expected levels of occurrence
or extent, and recovery is prompt, with minimal
effect on ecosystem functions. Pests have been
found, but there have been limited ecosystem
impacts. The occurrence, distribution and
abundance of introduced species are limited and
have minimal impact on ecosystem functions.
Incidences of disease or algal blooms occur
regularly in some areas. Occurrences of pests
require significant intervention or have significant
effects on ecosystem functions. The occurrence,
distribution and abundance of introduced species
trigger management responses, or have resulted
in significant impacts on ecosystem functions.
Disease or algal blooms occur regularly across the
region. Occurrences of pests or introduced species
are uncontrolled in some areas, have displaced
indigenous species and are seriously affecting
ecosystem functions.
The Environmental
Impact of Marine-
based Industries
Very Good (7–8)
Low Pressure
Good (5–6)
Moderate Pressure
Poor (3–4)
Significant Pressure
Very Poor (1–2)
High Pressure
Pests, Introduced
Species, Diseases
and Algal Blooms
Very Good (7–8)
Good (5–6)
Poor (3–4)
Very Poor (1–2)
Table 6:
Grading statements for the environmental impact of marine-
based industries.
Table 5:
Grading statements for pests, introduced species, diseases and
algal blooms, based on Ward (2011). Experts must consider the cumulative
impacts of all pressures that may have impacted upon the condition of pests,
introduced species, diseases and algal blooms.