منابع مشابه
Rapid chemotactic response enables marine bacteria to exploit ephemeral microscale nutrient patches.
Because ocean water is typically resource-poor, bacteria may gain significant growth advantages if they can exploit the ephemeral nutrient patches originating from numerous, small sources. Although this interaction has been proposed to enhance biogeochemical transformation rates in the ocean, it remains questionable whether bacteria are able to efficiently use patches before physical mechanisms...
متن کاملMeasuring the ecological significance of microscale nutrient patches
parative rapid ammonium uptake by four species of marine phytoplankton. Limnol. Oceanogr. 27: 814-827. -, J. J. MCCARTHY, AND D. G. PEAVEY. 1979. Growth rate influence on the chemical composition of phytoplankton in oceanic waters. Nature 279: 210-215. HEALEY, F. P. 1980. Slope of the Monod equation as an indicator of advantage in nutrient competition. Microb. Ecol. 5: 281-286. HUTCHINSON, G. E...
متن کاملMicroscale nutrient patches in planktonic habitats shown by chemotactic bacteria
Are nutrients available to microbial communities in micropatches long enough to influence growth and competition? And what are the sources of such patches? To answer these questions, the swimming behavior of chemotactic bacteria in seawater samples was examined. Clusters of bacteria formed in conjunction with cell lysis and excretion by protozoa. These point sources of nutrients spread into sph...
متن کاملPossible quorum sensing in marine snow bacteria: production of acylated homoserine lactones by Roseobacter strains isolated from marine snow.
We report here, for the first time, that bacteria associated with marine snow produce communication signals involved in quorum sensing in gram-negative bacteria. Four of 43 marine microorganisms isolated from marine snow were found to produce acylated homoserine lactones (AHLs) in well diffusion and thin-layer chromatographic assays based on the Agrobacterium tumefaciens reporter system. Three ...
متن کاملNutrient Reserves and Reproductive Performance of Female Lesser Snow Geese
--We studied the relation between nutrient reserves and reproductive performance of female Lesser Snow Geese (Chen caerulescens caerulescens) in 1971 and 1972 at the McConnell River (60ø50'N, 94ø25'W), Northwest Territories, Canada. We determined the potential clutch size of a pre-laying female by counting large (>20 mm), highly vascularized ovarian follicles; actual clutch size of post-laying ...
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ژورنال
عنوان ژورنال: Limnology and Oceanography
سال: 1979
ISSN: 0024-3590
DOI: 10.4319/lo.1979.24.5.0850