Nutrient depletion and particulate matter near the iceedge in the Weddell Sea

Pérez, Fíz F.; Figueiras, F. G.; Rı́os, Aida F.

doi:10.3354/meps112143

Cited by 7 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The slope of equation 2 is lower than the Redfield ratio and similar to that found in Antarctic waters (Copin-Montégut and Copin-Montégut, 1983;Pérez et al, 1994).…”

Section: Organic Matter In the Upper Mixed Layer The Excess Docsupporting

confidence: 82%

Dissolved organic carbon distributions in the Bransfield and Gerlache Straits, Antarctica

Doval

Álvarez‐Salgado

Castro

et al. 2002

Deep Sea Research Part II: Topical Studies in Oceanography

View full text Add to dashboard Cite

During FRUELA'95 cruise, seawater samples were collected at the Bransfield and Gerlache Straits for the analysis of dissolved organic carbon (DOC) profiles throughout the water column. An excess of DOC probably derived from phytogenic material was observed in the upper mixed layer (UML; average: +2213 µmol C l-1), compared to the constant concentration of refractory DOC below 400 m (444 µmol C l-1). The average excess DOC concentration was higher than the particulate organic carbon concentration, indicating the major contribution of DOC to carbon export in this area. However, large spatial variability of DOC in the upper mixed layer (52-102 µmol C l-1) was observed: excess DOC contributed from 15 to 57% to the actual DOC concentration. Maximum average DOC concentrations in the UML were recorded in the Gerlache Strait (71 µmol C l-1) and in the Gerlache-Bransfield confluence (80 µmol C l-1), whereas minimum values were recorded in the Bransfield Strait (61 µmol C l-1). Several shelf and slope stations showed a slight increase of DOC (5-10 µmol C l-1) in the deep layer, which might be related to organic matter release from the underlying sediments. Considering the net DOC release from phytoplankton, the low bacterial biomass and the reduced vertical DOC export, the DOC excess could build up in about 6 days for most of the sampling stations. The probable fate of the DOC excess is the eastwards horizontal transport by the Bransfield Current out the study area.

show abstract

“…The slope of equation 2 is lower than the Redfield ratio and similar to that found in Antarctic waters (Copin-Montégut and Copin-Montégut, 1983;Pérez et al, 1994).…”

Section: Organic Matter In the Upper Mixed Layer The Excess Docsupporting

confidence: 82%

Dissolved organic carbon distributions in the Bransfield and Gerlache Straits, Antarctica

Doval

Álvarez‐Salgado

Castro

et al. 2002

Deep Sea Research Part II: Topical Studies in Oceanography

View full text Add to dashboard Cite

show abstract

“…This is a situation similar to those at the ice-edge during the ice melting season. Ice-edge blooms are closely related to the water stratification, and the blooms are seeded from ice algae, which are released from sea ice with ice meltwater (Smith & Nelson 1985, Niebauer et al 1990, Pérez et al 1994, Jin et al 2007.…”

Section: Discussionmentioning

confidence: 99%

“…There are clear relationships in spring and summer between the physical regime and biological productivity at the ice-edge at the seasonal timescale (Smith & Nelson 1985, Niebauer et al 1990, Pérez et al 1994, Jin et al 2007. These studies showed that water stratification due to the supply of freshwater to the surface advances the ice-edge bloom that is seeded from ice algae in the meltwater supply.…”

Section: Introductionmentioning

confidence: 98%

An artificial pool experiment in Antarctic sea ice: effects of sea ice melting on physical and biogeochemical components of pool water

et al. 2012

View full text Add to dashboard Cite

Abstract:We performed an artificial pool experiment in the Antarctic multi-year land-fast ice to examine and simulate the effect of sea ice melting on physical and biogeochemical components of the sea ice field. The input of snow and ice meltwater resulted in warmer, low salinity water at the surface of the pool and probably stratification of the less dense water. Current speed measurements also pointed to water stratification within the pool. Rapid phytoplankton growth in the pool resulted in drastic decreases in concentrations of dissolved inorganic carbon and nutrients (NO 3 -and Si(OH) 4 ) in the surface waters of the pool, particularly depleted for NO 3 -. There was high correlation between variations of dissolved inorganic carbon and nutrient concentrations, but the apparent uptake ratios of these components deviated from that generally applied to marine phytoplankton. The sequence of changes in the physical and biogeochemical components of the pool water suggests that the onset of rapid phytoplankton growth was closely related to the water stratification, which provided stable conditions for phytoplankton bloom even though the supply of nutrients from under-ice water would have declined.

show abstract

“…The concentrations of chlorophyll a ranged from 11.3 to 28.1 in ST1 and from 8.4 to 16.3 µg L −1 in ST4. Possible correlation between PON and chlorophyll a indicated that PON was originated from plankton [25]. Concentrations of chlorophyll a fluctuated seasonally with the high concentration in April 2001 and with the relatively low concentration at other times.…”

Section: Water Qualitymentioning

confidence: 98%

Mangrove Rehabilitation on Highly Eroded Coastal Shorelines at Samut Sakhon, Thailand

Matsui¹,

Putth²,

Keiyo

2012

International Journal of Ecology

View full text Add to dashboard Cite

The study site is currently retreating at a rate of 20 m y−1due to severe coastal erosion and found to be highly polluted as revealed from the water, sediment and biological analysis. In an attempt to prevent coastal erosion, 14,000Rhizophora mucronata(RM) trees were planted across a heavily eroded shoreline at Samut Sakhon, Thailand. The survival rate of RM was high at the landward area and decreased at the offshore area. The most landward plot showed the highest survival rate when measured 4 years after planting (63.5%), while only 26.7% of trees survived at the most offshore plot. NPK and coconut fiber were shown to be significantly effective to enhance initial tree growths in heavily eroded area.

show abstract

Nutrient depletion and particulate matter near the iceedge in the Weddell Sea

Cited by 7 publications

References 30 publications

Dissolved organic carbon distributions in the Bransfield and Gerlache Straits, Antarctica

Dissolved organic carbon distributions in the Bransfield and Gerlache Straits, Antarctica

An artificial pool experiment in Antarctic sea ice: effects of sea ice melting on physical and biogeochemical components of pool water

Mangrove Rehabilitation on Highly Eroded Coastal Shorelines at Samut Sakhon, Thailand

Contact Info

Product

Resources

About