| Popis: |
In order to study the sediment macrofauna (> 1 mm) in a pristine sill fjord system, baseline investigations were carried out in 1991, 1992 and 1994 in the 30 km long triple-basined Holandsfjord, Northern Norway. Three sampling stations were located in the deepest part of each basin and one in the outer margin of the fjord just outside the outer basin. The innermost basin has relatively high inorganic sedimentation rates caused by glacier-derived melt water run-off. The bottom sediments were generally clay-silt dominated with an organic carbon content between 7 and 11 mg g−1 in the sill basins and between 21 and 22 mg g−1 in the outer margin of the fjord. The Shannon-Wiener diversity index ranged between 3.0 and 4.2, the number of individuals between 373 and 4910 indo m−2 and the number oftaxa per station between 23 and 45. The highest diversity was found at the outer margin of the fjord while the highest number of taxa, in two of three sampling years, occurred at the fjord head. The fauna at the ... |
