Chapter Diagnosis
6
7
8
194
chemical signalling among marine
organisms. Largest damage is to
marine birds, and to coasts. Waveprotected fine grade sediments at the
high water mark suffer most. Oil is
degraded by a number of microbes.
There is a discrepancy of opinions
regarding chemical dispersants
which bring an oil slick into the
water column, and on different
strategies of shore clean-up after
an oil-spill.
Concentration of man-made radioactivity in surface ocean waters
is about 15% of natural radioactivity. Waste radioactivity
released from reprocessing plants
is of regional importance.
Toxicity experiments with marine
organisms come to different results
depending on experimental conditions. The same holds true with
accumulation experiments. Elimination of pollutants from the sea by
sedimentation is counteracted by
burrowing fauna. Complicated
interactions occur at the air-sea and
at the water-sediment interfaces,
and in the metabolism of organisms.
Mercury is concentrated, by natural
processes, in large fish, seal, whale,
and marine birds. Concentrations are
such that unlimited consumption by
humans is risky. Concentrations in
normal sea fish are ~mall. There is a lot
of evidence for the thesis that mercury
concentrations in the water of the
oceans distant from point sources
of pollution are natural and have
not been influenced by man.
Therapy
experiments would render results
better comparable.
When not buried in anoxic sediment
layers, oil will disappear from the
marine environment after some
time. Careful considerations are
necessary whether or not to fight
oil-spills. When oil-spill fighting is
necessary, efficient equipment must
be available. More pilot projects
should be done in mechanical cleanup devices and efficient oil booms.
Local sources of radioactivity pollution should be stopped. Nuclear
weapons must not explode. More
scientific evidence is necessary
whether present concentrations of
fall-out radioactivity present a
hazard for small marine organisms
and for man.
Much more basic research on pollution-related topics is necessary
before a reliable understanding of
processes can be achieved, which
are similar with natural substances
as with man-made pollutants. If the
trend of the past decade continues
there will be a lot of surprises from
future research.
Man should eat high mercury level
seafood as a delicatesse, or leave it.
Nothing could be done against
these mercury concentrations.
6
7
8
194
chemical signalling among marine
organisms. Largest damage is to
marine birds, and to coasts. Waveprotected fine grade sediments at the
high water mark suffer most. Oil is
degraded by a number of microbes.
There is a discrepancy of opinions
regarding chemical dispersants
which bring an oil slick into the
water column, and on different
strategies of shore clean-up after
an oil-spill.
Concentration of man-made radioactivity in surface ocean waters
is about 15% of natural radioactivity. Waste radioactivity
released from reprocessing plants
is of regional importance.
Toxicity experiments with marine
organisms come to different results
depending on experimental conditions. The same holds true with
accumulation experiments. Elimination of pollutants from the sea by
sedimentation is counteracted by
burrowing fauna. Complicated
interactions occur at the air-sea and
at the water-sediment interfaces,
and in the metabolism of organisms.
Mercury is concentrated, by natural
processes, in large fish, seal, whale,
and marine birds. Concentrations are
such that unlimited consumption by
humans is risky. Concentrations in
normal sea fish are ~mall. There is a lot
of evidence for the thesis that mercury
concentrations in the water of the
oceans distant from point sources
of pollution are natural and have
not been influenced by man.
Therapy
experiments would render results
better comparable.
When not buried in anoxic sediment
layers, oil will disappear from the
marine environment after some
time. Careful considerations are
necessary whether or not to fight
oil-spills. When oil-spill fighting is
necessary, efficient equipment must
be available. More pilot projects
should be done in mechanical cleanup devices and efficient oil booms.
Local sources of radioactivity pollution should be stopped. Nuclear
weapons must not explode. More
scientific evidence is necessary
whether present concentrations of
fall-out radioactivity present a
hazard for small marine organisms
and for man.
Much more basic research on pollution-related topics is necessary
before a reliable understanding of
processes can be achieved, which
are similar with natural substances
as with man-made pollutants. If the
trend of the past decade continues
there will be a lot of surprises from
future research.
Man should eat high mercury level
seafood as a delicatesse, or leave it.
Nothing could be done against
these mercury concentrations.