Sediment-water Nutrient Fluxes in the Gulf of Finland, Baltic Sea

Conley, Daniel J.; Stockenberg, A.; Carman, Rolf; Johnstone, Ron; Rahm, Lars; Wulff, Fredrik

doi:10.1006/ecss.1997.0246

Cited by 92 publications

(51 citation statements)

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“…[21]. Sedimentation of nutrients and their release due to suspension and re-suspension also plays important role [29] [30]. Internal and external loading of nutrients are the big factors to be considered to achieve the sustainable water environment of the lagoon.…”

Section: Discussionmentioning

confidence: 99%

Assessment of Long-Term Physicochemical Water Quality Variations by PCA Technique in Lake Hwajinpo, South Korea

Bhattrai¹,

Kwak²,

Choi³

et al. 2017

JEP

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Physicochemical properties of water were analyzed to assess the long-term water quality variations in Lake Hwajinpo, Korea. Water quality data monitored from 1998 to 2015 was divided in three periods and descriptive statistics, correlation and rotated components were deducted using statistical procedures. Based on the results of analyses, water quality patterns in three periods (1998-2003, 2004-2009 and 2013-2015) were distinguishable from each other. Water parameters, Chlorophyll-a, total phosphorus, total nitrogen, dissolved oxygen and pH, showed the highest mean values in the first period. On the other hand, conductivity and salinity in the second period and temperature and suspended solids in the third period showed the highest mean values. Principal component analysis (PCA) procedure was utilized to deduct the most significant parameters influencing water quality and observed that each period had different pattern of variables. Salinity and conductivity were the two variables highly contributing in first component/factor (F1) explaining 20.77% and 22.93% of the total variance in the first period and second period, respectively. But total phosphorus and chlorophyll-a were the two variables highly loading in F1 of the third period explaining 23.72% of total variance. These results revealed that the water quality of Lake Hwajinpo had different patterns of variations throughout the study period. Thus, PCA results could be valuable to understand the water quality status of water body and take proper steps to protect the water environment.

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Section: Discussionmentioning

confidence: 99%

Assessment of Long-Term Physicochemical Water Quality Variations by PCA Technique in Lake Hwajinpo, South Korea

Bhattrai¹,

Kwak²,

Choi³

et al. 2017

JEP

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“…for the Gulf of Finland [(1.59 -28.5 μmol m −2 h −1 (Conley et al 1997), and 0.67 -17.5 μmol m −2 h −1 (Pitkänen et al 2003)], the Gdańsk Deep and the Oblique Sill separating the Gdańsk and Gotland Deeps (2.9 -5.7 μmol m −2 h −1 ; Graca et al 2006), and the northern Baltic proper (-1.7 -37 μmol m −2 h −1 ; Koop et al 1990). …”

Section: Discussionmentioning

confidence: 99%

“…marine sediments rich in phosphorus (P) compounds that are deposited in hypoxic/anoxic zones. The release of phosphates from sediments may intensify the primary production, especially in oligotrophic and Plimited waters, while changes in the relative proportions of the dissolved nutrients may modify the species composition of algal blooms (Koop et al 1990;Conley et al 1997;Conley et al 2002;Friedrich et al 2002;Denis, Grenz 2003;Virtasalo et al 2005).…”

Section: Introductionmentioning

confidence: 99%

Phosphate exchange across the sediment-water interface under oxic and hypoxic/anoxic conditions in the southern Baltic Sea

Łukawska‐Matuszewska

Burska

2011

Oceanological and Hydrobiological Studies

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Benthic fluxes of phosphate and phosphorus distribution in sediments from the southern Baltic Sea were investigated in spring and autumn in 2005 and 2007-2010. Strong spatial variability of phosphate fluxes was observed across the sediment-water interface. The highest values of phosphate flux from sediment (up to 37 μmol m −2 h −1 ), resulting from the high mineralization rate of organic matter and rapid phosphorus turnover due to macrofaunal activity and hydrodynamic conditions, were observed in the shallow area at depths ranging from 50 to 69 m. The rate of phosphate exchange in the transportation and accumulation bottom area with the water depth ≥72 m was several times lower (2.12 -6.22 μmol m −2 h −1 ). In continuously hypoxic or anoxic sediments, phosphorus was preserved in the refractory organic form, and sediments were depleted of redox-dependent phosphorus forms. In shallow area with well oxygenated near-bottom water, phosphorus was present mainly in the calcium-bound form.

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“…When C, N and P in the sediment are no longer significantly interacting with the water column, they can be considered as buried. Buried C and N in the sediments of the Baltic Sea are mainly in the form of organic compounds, whereas a substantial part of P occurs as inorganic forms such as associates with Fe-oxyhydroxides and various calcium compounds (Conley et al 1997;Carman 1998;Aigars and Carman 2001;Mort et al 2010). Burial of P formed in the marine system removes P from the nutrient cycle, while refractory P transported from land is buried passively (Ruttenberg and Berner 1993; Delaney 1998).…”

Section: Current Process Understandingmentioning

confidence: 99%

Environmental Impacts—Marine Biogeochemistry

Schneider

Eilola

Lukkari

et al. 2015

Regional Climate Studies

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Marine biogeochemistry deals with the budgets and transformations of biogeochemically reactive elements such as carbon, nitrogen and phosphorus. Inorganic nitrogen and phosphorus compounds are the major nutrients and control organic matter (biomass) production in the surface water. Due to various anthropogenic activities, the input of these nutrients into the Baltic Sea has increased drastically during the last century and has enhanced the net organic matter production by a factor of 2-4 (eutrophication). This has led to detrimental oxygen depletion and hydrogen sulphide production in the deep basins of the Baltic Sea. Model simulations based on the Baltic Sea Action Plan (BSAP) indicate that current eutrophication and thus extension of oxygen-depleted areas cannot be reversed within the next hundred years by the proposed nutrient reduction measures. Another environmental problem is related to decreasing pH (acidification) that is caused by dissolution of the rising atmospheric CO 2 . Estimates indicate a decrease in pH by about 0.15 during the last 1-2 centuries, and continuation of this trend may have serious ecological consequences. However, the concurrent increase in the alkalinity of the Baltic Sea may have significantly counteracted acidification.

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Sediment-water Nutrient Fluxes in the Gulf of Finland, Baltic Sea

Cited by 92 publications

References 0 publications

Assessment of Long-Term Physicochemical Water Quality Variations by PCA Technique in Lake Hwajinpo, South Korea

Assessment of Long-Term Physicochemical Water Quality Variations by PCA Technique in Lake Hwajinpo, South Korea

Phosphate exchange across the sediment-water interface under oxic and hypoxic/anoxic conditions in the southern Baltic Sea

Environmental Impacts—Marine Biogeochemistry

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