Significance of aerobic and anaerobic mineralization processes of organic carbon in sediments of a shallow coastal inlet in the southern Baltic Sea

Köster, Marion; Babenzien, Hans‐Dietrich; Black, H.J.; Dahlke, Sven; Gerbersdorf, Sabine Ulrike; Meyercordt, Jürgen; Meyer‐Reil, L.‐A.; Rieling, T.; Stodian, I.; Voigt, Andreas

doi:10.1016/s1568-2692(00)80015-7

Cited by 8 publications

(2 citation statements)

References 15 publications

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“…A fraction of 25-50 % of the organic matter derived from coastal primary production is deposited to the sediments (Nixon, 1981;Wollast, 1991;Jørgensen, 1996). The oxic surface layer of marine shelf sediments is restricted to a depth of only a few millimeters-1 cm at the sediment surface (Rasmussen and Jørgensen, 1992;Kühl and Jørgensen, 1994;Arnd et al, 2013), but can account for more than half of the total organic carbon mineralization (Jørgensen and Revsbech, 1989;Köster et al, 2000). The remaining organic carbon is degraded by anaerobic processes such as nitrate, manganese, iron, and sulfate reduction, followed by methanogenesis and/or fermentation (Henrichs and Reeburgh, 1987).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variability of sedimentary organic matter supply and recycling processes in coral reefs of Tayrona National Natural Park, Colombian Caribbean

Bayraktarov¹,

Wild²

2013

Preprint

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Abstract. Sediments are fundamental for the functioning of oligotrophic coral reef ecosystems, because they are major places for organic matter recycling. In Tayrona National Natural Park (TNNP), Colombian Caribbean, located between the population center Santa Marta (>455 000 inhabitants) in the southwest and several river mouths in the east, coral reef sediments experience pronounced changes in environmental conditions due to seasonal coastal upwelling, but knowledge on relevant spatiotemporal effects on organic matter supply to sediments and recycling processes is not available. Therefore, sediment traps were monthly deployed over 14 months complemented by assessment of sedimentary properties and sedimentary O2 demand (SOD) at water current-exposed and -sheltered sites along distance gradients (12–20 km) to Santa Marta and the eastern river mouths (17–27 km). Findings revealed that seasonal upwelling delivered strong (75–79% of annual supply) pulses of labile organic matter mainly composed of fresh phytoplankton detritus (C : N ratio 6–8) to the seafloor. Sedimentary chlorophyll contents and SOD increased significantly with decreasing distance to the eastern rivers, but only during upwelling. This suggests sedimentary organic matter supply control by nutrient-enriched upwelling waters and riverine runoff rather than by the countercurrent-located city of Santa Marta. Organic matter pulses caused C turnover rates of 4.4% h−1 that were more than 2-fold higher at water current-exposed compared to -sheltered sites. This indicates intense advective pore water exchange and ensuing rapid recycling of the supplied labile organic matter, particularly in the highly permeable water current-exposed silicate reef sands.

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Section: Introductionmentioning

confidence: 99%

Spatiotemporal variability of sedimentary organic matter supply and recycling processes in coral reefs of Tayrona National Natural Park, Colombian Caribbean

Bayraktarov¹,

Wild²

2013

Preprint

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“…In our case, no clear decision about the importance of the different effects of wind-induced resuspension of the upper sediment layer to P concentration could be made. Studies in the Darss-Zingst estuary have shown that these processes are a complex of biological as well as chemico-physical interactions which must be investigated in detail to quantify their relative importance (Ko¨ster et al, 2000;Rieling et al, 2000). Nitrogen internal loads could also be modified by resuspension.…”

Section: Discussionmentioning

confidence: 99%

Factors controlling phytoplankton blooms in a temperate estuary: nutrient limitation and physical forcing

Pilkaitytė¹,

Razinkovas²

Developments in Hydrobiology

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A combination of enclosure nutrient enrichment experiments and historical data analysis was used to identify the factors controlling seasonal dynamics and competition of the phytoplankton community in the Curonian lagoon (Southeast Baltic Sea). Experiments using different nutrient (N, P and Si) manipulations were performed in 10-l enclosures for 48 h. Changes in chlorophyll a concentrations, inorganic nutrient concentrations, and plankton cell density were monitored. Results revealed that phytoplankton development in the lagoon is strongly affected by ambient physical factors (wind, temperature). Nutrient limitation, however, also plays an important role in seasonal succession mechanisms showing quite distinct seasonal development patterns. Based on the data, available phytoplankton seasonal succession in the Curonian lagoon could be described as composed by three phases corresponding to different domination and regulatory mechanisms.

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Nutrient and Limitation Regimes in Coastal Water Ecosystems

Berthold

2023

Ecological Studies

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Significance of aerobic and anaerobic mineralization processes of organic carbon in sediments of a shallow coastal inlet in the southern Baltic Sea

Cited by 8 publications

References 15 publications

Spatiotemporal variability of sedimentary organic matter supply and recycling processes in coral reefs of Tayrona National Natural Park, Colombian Caribbean

Spatiotemporal variability of sedimentary organic matter supply and recycling processes in coral reefs of Tayrona National Natural Park, Colombian Caribbean

Factors controlling phytoplankton blooms in a temperate estuary: nutrient limitation and physical forcing

Nutrient and Limitation Regimes in Coastal Water Ecosystems

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