Copepod feeding stimulates bacterioplankton activities in a low phosphorus system
نویسندگان
چکیده
منابع مشابه
Copepod feeding currents: Food capture at low Reynolds number1
High-speed motion pictures of dye streams around feeding Calanoid copepods revealed that these important planktonic herbivores do not strain algae out of the water as previously described. Rather, a copepod flaps four pairs of feeding appendages to propel water past itself and uses its second maxillae to actively capture parcels of that water containing food particles. The feeding appendages of...
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Using digital holographic cinematography, we quantify and compare the feeding behavior of free-swimming copepods, Acartia tonsa, on nutritional prey (Storeatula major) to that occurring during exposure to toxic and non-toxic strains of Karenia brevis and Karlodinium veneficum. These two harmful algal species produce polyketide toxins with different modes of action and potency. We distinguish be...
متن کاملCopepod feeding currents: flow patterns, filtration rates and energetics.
Particle image velocimetry was used to construct a quasi 3-dimensional image of the flow generated by the feeding appendages of the calanoid copepod Temora longicornis. By scanning layers of flow, detailed information was obtained on flow velocity and velocity gradients. The flow around feeding T. longicornis was laminar, and was symmetrical viewed dorsally, but highly asymmetrical viewed later...
متن کاملPhosphorus restriction prevents parathyroid gland growth. High phosphorus directly stimulates PTH secretion in vitro.
Dietary phosphorus (P) restriction is known to ameliorate secondary hyperparathyroidism in renal failure patients. In early renal failure, this effect may be mediated by an increase in 1,25-(OH)2D3, whereas in advanced renal failure, P restriction can act independent of changes in 1,25-(OH)2D3 and serum ionized calcium (ICa). In this study, we examined the effects of dietary P on serum PTH, PTH...
متن کاملCopepod feeding behaviour and egg production during a dinoflagellate bloom in the North Sea
Feeding strategies of copepods were studied during a dinoflagellate-dominated bloom in the North Sea in August 2001. The aim of this study was to evaluate the importance of mesozooplankton grazing as a biological loss factor of harmful algal blooms under natural conditions. Therefore, ingestion, egestion and egg production experiments were performed with the most abundant copepod species Calanu...
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ژورنال
عنوان ژورنال: Aquatic Biology
سال: 2008
ISSN: 1864-7782,1864-7790
DOI: 10.3354/ab00042