184
Exercise 12
Figure 12.3. A multiple corer with ball-type closures that are released by a messenger after the tubes have
penetrated into the sediments.
5. It can be easily modified to perform experiments on benthic metabolism (e.g., with
plastic core liners).
6. When the coring tubes are made of transparent plastic, the sediment profile,
including the sediment-water interface, is readily available for visual inspection.
Neither the Ekman grab nor the multiple corer will take totally quantitative samples
in coarse gravel or organic debris [see Elliott and Drake (1981) for comparisons and
recommendations]. The use of SCUBA may facilitate quantitative sampling under
many circumstances.
Exercise 12
Figure 12.3. A multiple corer with ball-type closures that are released by a messenger after the tubes have
penetrated into the sediments.
5. It can be easily modified to perform experiments on benthic metabolism (e.g., with
plastic core liners).
6. When the coring tubes are made of transparent plastic, the sediment profile,
including the sediment-water interface, is readily available for visual inspection.
Neither the Ekman grab nor the multiple corer will take totally quantitative samples
in coarse gravel or organic debris [see Elliott and Drake (1981) for comparisons and
recommendations]. The use of SCUBA may facilitate quantitative sampling under
many circumstances.