geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Cycling of colloidal organic carbon and nitrogen during an estuarine phytoplankton bloom


, : Cycling of colloidal organic carbon and nitrogen during an estuarine phytoplankton bloom. Limnology and Oceanography 48(6): 2314-2320

To establish the influence of phytoplankton blooms on the cycling of dissolved and particulate species of organic carbon and nitrogen, we conducted a field study during a series of blooms in a coastal embayment on Shelter Island, NY. Using cross-flow filtration, we collected high- and low-molecular-weight (HMW and LMW) dissolved organic matter (DOM), along with particulate organic matter (POM). There was a significant and near equivalent enhancement in levels of particulate organic carbon (POC) and dissolved organic carbon (DOC) during phytoplankton blooms. HMW organic carbon was responsible for most (80%) of the DOC increase. In contrast, substantial amounts of organic nitrogen were produced in all size fractions (particulate organic nitrogen [PON], HMW, and LMW) during blooms. POC:PON and HMW C:N ratios exceeded Redfield stoichiometry and were well correlated with chlorophyll concentrations, which suggests that phytoplankton were the primary source of C-enriched particles and colloids in this system. DOM C:N ratios were higher during periods of elevated nitrate than during low nitrate conditions, which were dominated by phytoplankton with heterotrophic capabilities. This suggests that, in some coastal systems, the accumulation of C-enriched organic matter may be more dependent on algal species composition than ambient inorganic nitrogen levels. After the collapse of algal blooms, bacterial densities rose markedly, and all organic pools rapidly decreased to near prebloom levels. Despite substantial production and turnover rates of HMW organic carbon during blooms, longer residence times of other, more refractory, organic carbon pools such as the LMW fraction indicated that considerable portions of organic matter produced during estuarine phytoplankton blooms may be exported to continental shelves. Reprinted by permission of the publisher.

US$19.90

DOI: 10.4319/lo.2003.48.6.2314


Other references

Iredale, T., 1969: Charles Hedley. Proceedings of the Royal Society of New South Wales, 1967-68: 26-31

Morgan, P.; Willingham, J., 2011: Locating the source of heat for Waunita Hot Springs, Colorado. AAPG Meeting, Rocky Mountain Section

Vasilevich, V.I., 1978: Interspecific associations as a measure of organization in a plant community. The variation of species composition in a plant community and the limitations imposed by interspecific associations are discussed. Variation of the frequencies of different species combinations is estimated by the H-function. Its value is compared...

Wright, A.L.; Hart, G.C.; Kernohan, E.; Twentyman, G., 1996: Survey of the variation in ultraviolet outputs from ultraviolet A sunbeds in Bradford. Concerns have been expressed for some time regarding the growth of the cosmetic suntanning industry and the potential harmful effects resulting from these exposures. Recently published work has appeared to confirm a link between sunbed use and ski...

Bryant, J., 1996: Viability of the autopsy outside the institutions. Archives of Pathology & Laboratory Medicine 120(1): 9-10

King, T.; Morgan, F.P., 1959: Late results of removing the medial humeral epicondyle for traumatic ulnar neuritis. Journal of Bone and Joint Surgery. British Volume 41-B(1): 51-55

Cavallero, P.; Morino-Abbele, F.; Bertocci, B., 2007: The social relations of the elderly. The aim of the study was to investigate the social life of the elderly, their level of satisfaction with friendships and their opinions on loneliness and their ability to be alone in old age. A cognitive deterioration test was administered to 956...

Baharudin, M.Syukri.; Taha, M.; Imran, S.; Ismail, N.Hadiani.; Rahim, F.; Javid, M.Tariq.; Khan, K.Mohammed.; Ali, M., 2017: Synthesis of indole analogs as potent β-glucuronidase inhibitors. Natural products are the main source of motivation to design and synthesize new molecules for drug development. Designing new molecules against β-glucuronidase inhibitory is utmost essential. In this study indole analogs (1-35) were synthesized,...

Baha, M.; L.F.ou, A-Laurence., 2015: Gradual versus abrupt quitting among French treatment-seeking smokers. This study examined the prevalence and predictors of gradual quitting among treatment-seeking smokers. This study examined quit attempts among 28,156 adult smokers who attended French smoking cessation services nationwide between 2007 and 2010. Pr...

Anonymous, 1888: Dentists and Medical Men. Indian Medical Gazette 23(3): 93-93