Is sedimentation of copepod faecal pellets determined by cyclopoids? Evidence from enclosed ecosystems
نویسندگان
چکیده
منابع مشابه
Degradation of copepod faecal pellets in the upper layer: role of microbial community and Calanus finmarchicus
Copepod faecal pellets (FP) are considered important contributors to vertical carbon flux, but investigations comparing FP production with FP export using sediment traps conclude that vertical export is not their only fate. FP are degraded to a large extent in the upper 60 m, and even among large, fast-sinking FP, only a fraction reaches sediment traps deeper than 200 m. Retention mechanisms fo...
متن کاملImportance of copepod carcasses versus faecal pellets in the upper water column of an oligotrophic area
Downward flux of zooplankton faecal pellets and carcasses was studied during and after the spring bloom in an oligotrophic coastal area of the Western Mediterranean using a ‘swimmer-excluding’ sediment trap. Zooplankton detritus retrieved in the trap were comprised of cylindrical faecal pellets (from mesoand macrozooplankton) and copepod carcasses with a respective carbon flux of 0.05 e2.69 mg ...
متن کاملLimnol. Oceanogr., 44(6), 1999, 1388–1399
We investigated the sedimentation of copepod fecal pellets in three different sea areas representing a sheltered bay, an archipelago area, and the open sea on the southwestern coast of Finland in the northern Baltic Sea. Fecal carbon sedimentation was always ,0.05% of the total sedimentation of particulate organic carbon, whereas the fecal carbon production (estimated from copepod abundance, as...
متن کاملDegradation of copepod fecal pellets: key role of protozooplankton
Copepod fecal pellets are often degraded at high rates within the upper part of the water column. However, the identity of the degraders and the processes governing the degradation remain unresolved. To identify the pellet degraders we collected water from Øresund (Denmark) approximately every second month from July 2004 to July 2005. These water samples were divided into 5 fractions (<0.2, <2,...
متن کاملSize distribution of superparamagnetic particles determined by magnetic sedimentation.
We report on the use of magnetic sedimentation as a means to determine the size distribution of dispersed magnetic particles. The particles investigated here are (i) single anionic and cationic nanoparticles of diameter D approximately 7 nm and (ii) nanoparticle clusters resulting from electrostatic complexation with polyelectrolytes and polyelectrolyte-neutral copolymers. A theoretical express...
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ژورنال
عنوان ژورنال: Journal of Plankton Research
سال: 2003
ISSN: 1464-3774
DOI: 10.1093/plankt/25.8.917