Phytoplankton Pigments in Baltic Sea Seston and Sediments: Seasonal Variability, Fluxes, and Transformations

Bianchi, Thomas S.; Rolff, Carl; Widbom, Bertil; Elmgren, Ragnar

doi:10.1006/ecss.2001.0911

Cited by 88 publications

(47 citation statements)

References 34 publications

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“…Both species also recruit at the same time in spring, which suggests that they could potentially compete for food. Such competition is, however, likely less in late spring-early summer, when abundant new organic matter from the recently settled spring bloom is still available in the surface sediment (Bianchi et al 2002). Later in their life, Pontoporeia femorata and Monoporeia affinis become more specialised subsurface and surface deposit-feeders, respectively.…”

Section: Discussionmentioning

confidence: 99%

Uptake of sedimentary organic matter by the deposit-feeding Baltic amphipods Monoporeia affinis and Pontoporeia femorata

Byrén¹,

Ejdung²,

Elmgren³

2006

Mar. Ecol. Prog. Ser.

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Section: Discussionmentioning

confidence: 99%

Uptake of sedimentary organic matter by the deposit-feeding Baltic amphipods Monoporeia affinis and Pontoporeia femorata

Byrén¹,

Ejdung²,

Elmgren³

2006

Mar. Ecol. Prog. Ser.

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“…Considering the uptake of carbon from both cyanobacterial blooms by some meiofaunal species in our study and the evidence that cyanobacterial blooms have existed in the Baltic for the past 7000 yr (Bianchi et al 2000), it is plausible that physiological tolerance to nodularin and other secondary metabolites produced by cyanobacteria has evolved in some meiofauna taxa, as it has in some aquatic crustacean groups (Demott and Moxter 1991). Nevertheless, the nematode abundance data show significantly fewer large individuals of Paracanthonchus spp., the only nematode that showed an uptake of cyanobacterial carbon, in the surface layer of the Nodularia treatment than in the controls and the Aphanizomenon treatments (Fig.…”

Section: Discussionmentioning

confidence: 60%

“…(Heiskanen and Kononen 1994;Tallberg and Heiskanen 1998), and Gustafsson et al (2004) showed that sediment trap collections may significantly underestimate the sedimentation rates of summer blooms of cyanobacteria. The presence in sediments of cyanobacterial pigments (Bianchi et al 2000(Bianchi et al , 2002 and of the toxin nodularin, produced by N. spumigena (MazurMarzec et al 2007) in considerable quantities, together with the light nitrogen isotopic composition of sediments of the central Baltic proper (Bianchi et al 2000;Voss et al 2005) also indicate a considerable input of organic matter derived from cyanobacteria to the benthic ecosystems of the Baltic. Hence, there is a need to clarify how such inputs are incorporated in the benthic food web.…”

mentioning

confidence: 99%

Settling blooms of filamentous cyanobacteria as food for meiofauna assemblages

Nascimento

Karlson

Elmgren

2008

Limnology & Oceanography

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Summer blooms of filamentous nitrogen-fixing cyanobacteria in the Baltic Sea are normally dominated by Aphanizomenon sp. and the toxin-producing Nodularia spumigena. In a 2-week laboratory experiment, we followed the uptake by representative benthic meiofauna species of 14 C-labeled organic carbon from blooms, each dominated by one of these cyanobacteria. Natural bloom material was collected and labeled by incubation with NaH 14 CO 3 . Uptake of cyanobacterial carbon was recorded for the major meiofauna taxa living in the firstcentimeter layer, namely ostracods, harpacticoids, and nematodes. The uptake rates were within the range found for diatoms in other studies, indicating that cyanobacteria may be an important food resource for the meiobenthos. The uptake of cyanobacterial carbon varied significantly among species, even within the same class. The ostracod Candona neglecta showed the highest uptake values, whereas two other ostracod species took up very little of the label. There was no significant difference in utilization of carbon from Aphanizomenon sp. and N. spumigena and no reduction in the abundance of the meiofaunal taxa analyzed compared to unexposed controls, indicating that Baltic meiofaunal assemblages in general experience no mortality when exposed to settled cyanobacteria, even the hepatotoxic N. spumigena.

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“…Figure 18.11 shows the spatial variation in particulate organic C content in the sediments . Sedimentation rates of organic matter vary spatially, especially in the archipelagos because of the fractured topography (Winterhalter et al 1981) and temporally because of the seasonality of plankton growth and senescence (Bianchi et al 2002). Anoxia which is common in the Baltic Sea can favour burial of organic matter but diminish the burial of P because the formation of Fe-oxyhydroxides that bind PO 4 is inhibited (Van Cappellen and Ingall 1994;Ingall et al 1993;Mort et al 2010;Jilbert et al 2011).…”

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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Phytoplankton Pigments in Baltic Sea Seston and Sediments: Seasonal Variability, Fluxes, and Transformations

Cited by 88 publications

References 34 publications

Uptake of sedimentary organic matter by the deposit-feeding Baltic amphipods Monoporeia affinis and Pontoporeia femorata

Uptake of sedimentary organic matter by the deposit-feeding Baltic amphipods Monoporeia affinis and Pontoporeia femorata

Settling blooms of filamentous cyanobacteria as food for meiofauna assemblages

Environmental Impacts—Marine Biogeochemistry

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