Influence of nutrients and mixing on the primary production and community respiration in the Gulf of Riga

Olesen, Michael; Lundsgaard, Claus; Andrushaitis, Andris

doi:10.1016/s0924-7963(99)00054-8

Cited by 28 publications

(5 citation statements)

References 44 publications

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“…This is in contrast to other coastal regions subjected to high river discharges that are only autotrophic over the period of the spring bloom, e.g. the upper Chesapeake Bay (Smith and Kemp 1995) and the Gulf of Riga (Olesen et al 1999). Alternation between periods dominated by autotrophy and periods dominated by heterotrophy over the summer months has been documented in the Scheldt estuarine plume in the Belgian coastal zone (Borges et al 2008).…”

Section: Metabolic Balance In Rofi and Non-rofi Regionsmentioning

confidence: 81%

Short-term and seasonal variation in metabolic balance in Liverpool Bay

et al. 2011

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Regions of freshwater influence (ROFIs) are dynamic areas within the coastal seas that experience cycles of stability driven by density gradients and the spring-neap tidal cycle. As a result, pulses of biological production may occur on a more frequent timescale than the classic seasonal cycle. Net community production (NCP) rates and chlorophyll a concentration are presented from a site within the ROFI of Liverpool Bay and compared to similar measurements made at a site outside the ROFI during 2009. The influence of water column stability on biological production in the ROFI was also investigated using high-frequency observations from a Cefas Smartbuoy. Both sites were autotrophic from spring to autumn before becoming heterotrophic over winter. NCP at the inshore site was estimated to range from 30.8 to 50.4 gC m −2 year −1 . A linear relationship detected between chlorophyll a and NCP from both sites was used to estimate metabolic balance over 1 year at the ROFI site using high-resolution chlorophyll a concentrations from the Smartbuoy but was found to poorly replicate NCP rates compared to those derived from dissolved oxygen fluxes. There was no clear biological response to periods of stratification within the ROFI, and it is proposed that changes in light attenuation in the Liverpool Bay ROFI, driven not only by stratification but also by fluctuations in riverine sediment load, most likely play an important role in controlling phytoplankton growth in this region.

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Section: Metabolic Balance In Rofi and Non-rofi Regionsmentioning

confidence: 81%

Short-term and seasonal variation in metabolic balance in Liverpool Bay

et al. 2011

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“…The coefficient of determination are comparably high based on the untransformed values for GPP alone (r 2 = 0.63, n=2), representing estuarine environments. One report of a significant relationship with phytoplankton biomass (i.e., chlorophyll-a) from the Gulf of Riga had the highest r 2 value reported for a predictor but re-analysis resulted in a lower value (r 2 = 0.65, year 1995 data) (Olesen et al, 1999). This value was close to one case of a high explanation for chlorophyll-a based on untransformed values reported from the Chesapeake Bay (r 2 = 0.70) (Smith and Kemp, 2001).…”

Section: Explanatory Power Of Predictorsmentioning

confidence: 99%

Ecological consequences of climate change in boreal marginal seas

2024

Frontiers Research Topics

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Frontiers is more than just an open access publisher of scholarly articles: it is a pioneering approach to the world of academia, radically improving the way scholarly research is managed. The grand vision of Frontiers is a world where all people have an equal opportunity to seek, share and generate knowledge. Frontiers provides immediate and permanent online open access to all its publications, but this alone is not enough to realize our grand goals. Frontiers journal seriesThe Frontiers journal series is a multi-tier and interdisciplinary set of openaccess, online journals, promising a paradigm shift from the current review, selection and dissemination processes in academic publishing. All Frontiers journals are driven by researchers for researchers; therefore, they constitute a service to the scholarly community. At the same time, the Frontiers journal series operates on a revolutionary invention, the tiered publishing system, initially addressing specific communities of scholars, and gradually climbing up to broader public understanding, thus serving the interests of the lay society, too. Dedication to qualityEach Frontiers article is a landmark of the highest quality, thanks to genuinely collaborative interactions between authors and review editors, who include some of the world's best academicians. Research must be certified by peers before entering a stream of knowledge that may eventually reach the public -and shape society; therefore, Frontiers only applies the most rigorous and unbiased reviews. Frontiers revolutionizes research publishing by freely delivering the most outstanding research, evaluated with no bias from both the academic and social point of view. By applying the most advanced information technologies, Frontiers is catapulting scholarly publishing into a new generation. What are Frontiers Research Topics?Frontiers Research Topics are very popular trademarks of the Frontiers journals series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area.

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Section: Explanatory Power Of Predictorsmentioning

confidence: 99%

Regulation of marine plankton respiration: A test of models

Wikner

Vikström²,

Verma³

2023

Front. Mar. Sci.

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Plankton respiration is a major process removing oxygen from pelagic environments and constitutes one of the largest oxygen transformations in the sea. Where the O2 supplies due to dissolution, advection and oxygenic photosynthesis are not sufficient, hypoxic, or anoxic waters may result. Coastal waters with limited water exchange are especially prone to have low oxygen levels due to eutrophication and climate change. To support marine environmental management in a period of rapid climate change, we investigated the current knowledge of regulating plankton respiration based on field and experimental studies reported in the literature. Models for regulation of plankton respiration was tested on a three-year field data set. Temperature is the most reported predictor positively influencing plankton respiration (mean r2 = 0.50, n=15). The organic carbon supply driven by primary production has a similar coefficient of determination but fewer reported relationships (mean r2 = 0.52, n=6). Riverine discharges of dissolved organic carbon can override the influence of primary production in estuaries precluding effects of nutrient reductions. The median predictions of respiration regulation produced by current models vary by a factor of 2 from the median of observed values and extreme values varied even more. Predictions by models are therefore still too uncertain for application at regional and local scales. Models with temperature as predictor showed best performance but deviated from measured values in some seasons. The combined dependence of plankton respiration on temperature, phytoplankton production and discharge of riverine organic carbon will probably lead to increased oxygen consumption and reduced oxygen levels with projected climate change. This will be especially pronounced where increased precipitation is expected to enhance riverine discharges of carbon compounds. The biologically mediated transfer of carbon for long-term storage in deeper layers will slow down. Implementation of plankton respiration measurements in long-term ecological monitoring programs at water body and basin scales is advocated, which would enable future multivariate analyses and improvements in model precision across aquatic environments.

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Influence of nutrients and mixing on the primary production and community respiration in the Gulf of Riga

Cited by 28 publications

References 44 publications

Short-term and seasonal variation in metabolic balance in Liverpool Bay

Short-term and seasonal variation in metabolic balance in Liverpool Bay

Ecological consequences of climate change in boreal marginal seas

Regulation of marine plankton respiration: A test of models

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