Shallow Temperate Estuary Research Articles

Control of Periphyton on Zostera marina by the Eastern Mudsnail, Ilyanassa obsoleta (Say), in a Shallow Temperate Estuary.

Previous articleNext article No AccessECOLOGY AND POPULATION BIOLOGYControl of Periphyton on Zostera marina by the Eastern Mudsnail, Ilyanassa obsoleta (Say), in a Shallow Temperate EstuaryB. Kinlan, E. Duffy, J. Cebrian, J. Hauxwell, and I. ValielaB. Kinlan Search for more articles by this author , E. Duffy Search for more articles by this author , J. Cebrian Search for more articles by this author , J. Hauxwell Search for more articles by this author , and I. Valiela Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by The Biological Bulletin Volume 193, Number 2October 1997 Published in association with the Marine Biological Laboratory Article DOIhttps://doi.org/10.1086/BBLv193n2p286 Views: 17Total views on this site Copyright © 1997 by Marine Biological LaboratoryPDF download Crossref reports no articles citing this article.

Primary plankton production, respiration and nitrification in a shallow temperate estuary during summer

Patterns of longitudinal and temporal variation in rates of primary production, respiration and nitrification were investigated in the Urdaibai estuary during August 1994. Rates of primary production, as measured with the 14C technique, varied between 0.002 and 2.828 mg C l −1 d −1. 14C and oxygen based rates of primary production showed a good correlation, but photosynthetic quotients (mean PQ of 2.2) were higher than expected from considerations of the N source used by the algae. Chlorophyll a biomass showed an inverse correlation with salinity and tidal flushing is hypothesized to be a major controlling factor of its spatial variability. Temporal variations in chlorophyll a concentration were associated primarily to changes in the lunar cycle and following rain events. Rates of community respiration varied between 0.154 and 6.857 mg O 2 l −1 d −1 and were significantly and positively correlated with both bacterial abundance and chlorophyll a concentration. The relationship between respiration and primary production suggested that respiration rates based on substrates not associated with the autochthonous pelagic primary production increased greatly from the outer to the inner estuary and that the consumption of autotrophic production by heterotrophs in the water column was higher in the less productive outer estuary than in highly productive intermediate and inner areas. Except at the innermost station, temporal variations in respiration rates followed variations in temperature. The ratio of gross primary production to respiration ( GP R ) showed marked spatial and temporal variations, ranging from 0.24 to 17.94. Rates of nitrification, measured as allylthiourea sensitive rates of CO 2 fixation, varied from undetectable levels to 9.3 μg C l −1 d −1.In general, highest rates of nitrification were observed at the inner estuary under conditions of elevated ammonia concentration, high bacterial abundance and high turbidity. Rates of nitrification were frequently associated with the > 3 μm size fraction. Oxygen consumed in nitrification was estimated to account on average for 4.7 ± 8.3% of total oxygen consumption.

The Growth and Consumption of Macroalgae in Estuaries: The Role of Invertebrate Grazers Along a Nutrient Gradient in Waquoit Bay, Massachusetts.

Previous articleNext article No AccessECOLOGY: IMPACT OF NUTRIENT LOADING ON ESTUARIES AND MARSHESThe Growth and Consumption of Macroalgae in Estuaries: The Role of Invertebrate Grazers Along a Nutrient Gradient in Waquoit Bay, MassachusettsA. Horne, J. McClelland, and I. ValielaA. Horne Search for more articles by this author , J. McClelland Search for more articles by this author , and I. Valiela Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by The Biological Bulletin Volume 187, Number 2October 1994 Published in association with the Marine Biological Laboratory Article DOIhttps://doi.org/10.1086/BBLv187n2p279 Views: 20Total views on this site Citations: 2Citations are reported from Crossref Copyright © 1994 by Marine Biological LaboratoryPDF download Crossref reports the following articles citing this article:E. J. Duffy, B. P. Kinlan, and I. Valiela Influence of Grazing and Nitrogen Loading on Benthic Microalgal Biomass in Estuaries of Waquoit Bay, Massachusetts, The Biological Bulletin 193, no.22 (Sep 2016): 285–286.https://doi.org/10.1086/BBLv193n2p285B. Kinlan, E. Duffy, J. Cebrian, J. Hauxwell, and I. Valiela Control of Periphyton on Zostera marina by the Eastern Mudsnail, Ilyanassa obsoleta (Say), in a Shallow Temperate Estuary, The Biological Bulletin 193, no.22 (Sep 2016): 286–287.https://doi.org/10.1086/BBLv193n2p286