standardization of environmental data and information - International ...

area in the southeast Pacific Ocean. Other studies need to calculate their
own site-specific figures during the first phases of the project to make sure
that enough samples are collected during the experimental phase.
Nevertheless, the DISCOL/ATESEPP results indicate the approximate levels
of effort required to be acceptable, and may serve as a preliminary order of
magnitude for the planning phase and the submission of proposals for
similar studies in the deep sea.
Additionally, one result from our investigation was that for the first
time we established that recovery of such a large disturbed area had
occurred and the recovery process was scientifically investigated. This
result was contrary to most previous assumptions. According to these
results, based on our experiment and on its scale, which was much smaller
than possible impacts created by future mining, there should probably be
no objections against mining.
4. Recommendations for the Standardization of Methods
We learnt during all our expeditions that it is very important not to
alter any method during the course of sampling, even over years and when
better methods become available, because otherwise you cannot compare
your data. For sampling and analysis of benthos macrofauna and sediment,
we recommend the following methods and procedures as applied during
DISCOL/ECOBENT:
4.1. Gear for sampling macrofauna
USNEL box corer with a sampling area of 2500 cm².
Very important: After sampling, the top plates above the sampling
area need to be closed very tight – take care to ensure
good seals. The spade should have a seal as well so that
the box is also very tightly closed at the bottom.
4.2. Sampling procedure
Depending on the capabilities of speed control for hoisting and
lowering the winch, the box corer should touch the sea bottom at a speed of
0.3-0.5 m/sec. Use 0.3 m/sec only when the sea is absolutely calm. You
can send down the box corer rapidly but you should reduce the speed
before hitting the bottom. Several protocols have been published which can
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