Sedimentation of copepod fecal material in the coastal northern Baltic Sea: Where did all the pellets go?
作者： Markku Viitasalo , Mirja Rosenberg , Anna-Stiina Heiskanen , Marja Koski
DOI: 10.4319/LO.1999.44.6.1388
关键词: Hydrology 、 Water column 、 Organic matter 、 Oceanography 、 Sedimentation 、 Seasonality 、 Environmental science 、 Archipelago 、 Zooplankton 、 Copepod 、 Bay
摘要: We investigated the sedimentation of copepod fecal pellets in three different sea areas representing a sheltered bay, an archipelago area, and open on southwestern coast Finland northern Baltic Sea. Fecal carbon was always ,0.05% total particulate organic carbon, whereas production (estimated from abundance, assuming rate 10 21 d ) contributed to 4‐17% sedimentation. Thus, .99% material remineralized within mixed water layer (0‐20 m). However, area season dominated by large calanoid Limnocalanus macrurus (bay station spring), order magnitude higher than at other two stations. From June onwards, when bay cyclopoids, situation changed: remained 30% lower archipelago, although estimated be 2 times bay. Furthermore, pellet fragmentation (percentage broken sedimentation) highest spring autumn all increased towards sea, being 27%, 45%, 61% stations, respectively. This gradation probably due more intense turbulence column mixing resulting efficient loosening breakup pellets. The overall contribution feces vertical export Sea appears small, but seasonal spatial variations hydrography mesozooplankton community structure significantly affect rates.
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