Tidal time-scale variation in nutrient flux across the sediment–water interface of an estuarine tidal flat

Sakamaki, Takashi; Nishimura, Osamu; Sudo, R.

doi:10.1016/j.ecss.2006.01.005

Cited by 61 publications

(45 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…OM values observed in this study were similar to those seen at other fish farms (Sakamaki et al 2006;Nizzoli et al 2007) although Mantzavrakos et al (2007)observed higher values in OM in the Mediterranean Sea.…”

Section: Benthic Fluxessupporting

confidence: 76%

“…Greater negative fluxes were observed in autumn and winter under the cages, co-occurring with the higher concentrations of NO 3 -in the bottom water (see Table 1). (Sakamaki et al 2006). The high concentrations of NO 3 -in the bottom waters increase its flux into sediments, increasing NO 3 -concentrations in interstitial water, which in turn favours bacterial nitrate respiration.…”

Section: Benthic Fluxesmentioning

confidence: 99%

See 1 more Smart Citation

Exchange of nutrients and oxygen across the sediment–water interface below a Sparus aurata marine fish farm in the north-western Mediterranean Sea

et al. 2012

View full text Add to dashboard Cite

Morata, T.; Sospedra, J.; Falco Giaccaglia, SL.; Rodilla Alama, M. (2012). Exchange of nutrients and oxygen across the sediment-water interface below a Sparus aurata marine fish farm in the north-western Mediterranean Sea. Journal of Soils and Sediments. 12(10):1623-1632. doi:10.1007/s11368-012-0581-2. It is the first of its kind to be based on benthic flux data gathered in situ below fish farms for this particular area. Materials and methods Samples were collected on four samplingcampaigns over a 1-year cycle under a Sparus aurata fish farm facility where benthic fluxes were measured in situ using light and dark benthic chambers.Bottom water and sediment samples were also collected. Data were compared to those for a nearby control station.Results and discussion Significant differences were found (ANOVA,

show abstract

Section: Benthic Fluxessupporting

confidence: 76%

Section: Benthic Fluxesmentioning

confidence: 99%

Exchange of nutrients and oxygen across the sediment–water interface below a Sparus aurata marine fish farm in the north-western Mediterranean Sea

et al. 2012

View full text Add to dashboard Cite

show abstract

“…하구 갯벌 등의 연안 환경 퇴적물에서 재생산된 영양염이 수층 의 일차생산에 필요한 영양염 중 많은 부분을 공급한다(Benthicpelagic coupling; Kemp et al, 1992;Cowan et al, 1996). 즉 낮 은 수심으로 인해 연안으로 유입된 유기물 중 대부분은 퇴적물에 서 분해가 이루어지며 (Nixon and Pilson, 1983), 그 결과 재생산 된 질소 영양염은 수층으로 공급되어, 일차생산에 필요한 질소의 20~80%를 담당할 수 있다 (Rowe et al, 1975;Fisher et al, 1982;Glud, 2005;Sakamaki et al, 2006;Viitasalo, 2007 (Seitzinger, 1988;Risgaard et al, 1994). 육지에서 하구로 유 입된 질소 중 약 10-60% 정도가 탈질소화에 의해 제거되어 연안 의 부영양화를 조절하는 것으로 알려져 있다 (Nixon et al, 1996;Nedwell and Trimmer, 1996;Ogilvie et al, 1997;Dong et al, 2000;An and Joye, 2001).…”

unclassified

“…3). 겨울철에는 낮은 온도에 의해 퇴적물 산소 소모가 줄어 듦과 동시에, 저서미세조류의 광합성이 상대적으로 우세하게 나타 나서, 산소가 퇴적물에서 수층으로 방출된 것으로 추정된다 (Rysgaard et al, 1993;Dong et al, 2000;Sakamaki et al, 2006). 조사기간 동 안 여름철에 비해 겨울철에 비교적 높은 표층 퇴적물 엽록소-a 함 량이 측정되어( 으로 소모되는 경향이 나타났다 (Fig.…”

unclassified

“…겨울철에는 수층에서 퇴적 물로 암모늄이 유입되었는데, 이는 저서미세조류의 광합성 활동 중 암모늄의 섭취가 높아, 겨울철 낮아진 재광물화에 의한 암모늄 공급이 소비보다 작았음을 시사한다 Thornton et al, 2007). (Cabrita and Brotas, 2000;Sakamaki et al, 2006). 즉, 저서미세조류의 광합성 에 영향을 미치는 빛과 제한 영양염의 공급 정도 그리고 재광물 화율을 조절하는 유기물의 질 등이 있을 수 있다 (Herbert, 1999;Magalhães et al, 2002).…”

unclassified

See 1 more Smart Citation

Seasonal Variation of Nitrogen Loads and Nitrogen Cycling at Tidal Flat Sediments in Nakdong River Estuary

Lee

Kwon²,

2012

The Sea

View full text Add to dashboard Cite

) in this study was higher compared to the other Korean coast measured with the same method. Denitrification showed the same seasonal variation as oxygen fluxes. Denitrification rate based on 15 N-nitrate showed a strong correlation with nitrate flux into the sediments from the overlying water. Denitrification via "water column supplied nitrate (D w )", calculated from Isotope pairing technique, also correlated well with nitrate flux into the sediments. Nitrate from water column seems to account for seasonal variation of denitrification in Nakdong River Estuary. To understand general patterns and trends of biogeochemical processes of sediments in the Nakdong River Estuary, we categorized biogeochemical fluxes measured in this study according to direction and sizes of fluxes. Type 1(high oxygen and inorganic nitrogen fluxes into the sediments and high denitrification) occurred in summer, whereas Type 2(low oxygen and inorganic nitrogen fluxes into the sediments and low denitrification) occurred in rest of the season. Intertidal flat sediments seem to react sensitively to influence of freshwater from the Nakdong River.

show abstract

Toward relaxed eddy accumulation measurements of sediment‐water exchange in aquatic ecosystems

Lemaire

Noß

Lorke

2017

Geophysical Research Letters

View full text Add to dashboard Cite

Solute transport across the sediment‐water interface has major implications for water quality and biogeochemical cycling in aquatic ecosystems. Existing measurement techniques, however, are not capable of resolving sediment‐water fluxes of most constituents under in situ flow conditions. We investigated whether relaxed eddy accumulation (REA), a micrometeorological technique with conditional sampling of turbulent updrafts and downdrafts, can be adapted to the aquatic environment. We simulated REA fluxes by reanalyzing eddy covariance measurements from a riverine lake. We found that the empirical coefficient that relates mass fluxes to the concentration difference between both REA samples is invariant with scalar and flow and responds as predicted by a joint Gaussian distribution of linearly correlated variables. Simulated REA fluxes differed on average by around 30% from eddy covariance fluxes (mean absolute error). Assessment of the lower quantification limit suggests that REA can potentially be applied for measuring benthic fluxes of a new range of constituents that cannot be assessed by standard eddy covariance methods.

show abstract

Tidal time-scale variation in nutrient flux across the sediment–water interface of an estuarine tidal flat

Cited by 61 publications

References 47 publications

Exchange of nutrients and oxygen across the sediment–water interface below a Sparus aurata marine fish farm in the north-western Mediterranean Sea

Exchange of nutrients and oxygen across the sediment–water interface below a Sparus aurata marine fish farm in the north-western Mediterranean Sea

Seasonal Variation of Nitrogen Loads and Nitrogen Cycling at Tidal Flat Sediments in Nakdong River Estuary

Toward relaxed eddy accumulation measurements of sediment‐water exchange in aquatic ecosystems

Contact Info

Product

Resources

About