Sedimentation and particulate nutrient dynamics along a coastal gradient from a fjord-like bay to the open sea

Heiskanen, Anna-Stiina; Tallberg, Petra

doi:10.1007/978-94-017-0912-5_13

Cited by 29 publications

(30 citation statements)

References 32 publications

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“…Syvitski et al 1987). The prevailing environmental conditions with low water currents and exchange (Pinochet & Salinas 1995), and frequently high sedimentation rates (Pickard & Stantor 1980, Heiskanen & Tallberg 1999 favour the existence of motile detritus feeders and predators, not only in case of polychaetes but also for other taxa, while suspension feeders are almost absent. This composition found in MR seems to be a typical feature for fjord and channel communities and is also reported for other regions worldwide (Rosenberg 2001 No significant differences became obvious in the evenness values between both areas.…”

Section: Discussionmentioning

confidence: 99%

Polychaete assemblages on the Magellan and Weddell Sea shelves: comparative ecological evaluation

Montiel

Gerdes²,

Hilbig³

et al. 2005

Mar. Ecol. Prog. Ser.

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Similarities between the soft-bottom polychaete assemblages on either side of the Drake Passage and spatial patterns of these assamblages were analysed based on data from 273 corer samples collected in the Magellan region (42 to 55°S, 254 m mean water depth) and on the Weddell Sea shelf (70 to 71°S, 263 m mean water depth). Paraonidae, Ampharetidae and Maldanidae were the most abundant families in the Magellan region, while in the Weddell Sea, Syllidae, Terebellidae and Spionidae were most abundant. The total species number found in the Magellan region (199) was higher than in the Weddell Sea (163), and significantly higher values of heterogeneity diversity, species richness and density were found in the Weddell Sea. At most of the Weddell Sea stations, all 3 trophic guilds (suspension feeders, detritus feeders and predators) were present, whereas suspension feeders were almost absent in the Magellan samples. The species abundance distribution showed a high number of species represented by only 1 specimen in both regions. This causes low dominance and similar high values of evenness in both regions. We suggest that the polychaete assemblage structures in both regions are influenced by environmental stress through ice and the physical complexity of the areas, which results in many different habitats.

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Section: Discussionmentioning

confidence: 99%

Polychaete assemblages on the Magellan and Weddell Sea shelves: comparative ecological evaluation

Montiel

Gerdes²,

Hilbig³

et al. 2005

Mar. Ecol. Prog. Ser.

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“…Ephippia (n = 120) were pipetted into each core and distributed evenly onto the sediment. After 1 h, 160 ml of sediment (<100 µm) were added to each core to bury the eggs under a 0.5 to 1 cm thick sediment layer, approximating an average annual accumulation rate in the study area (Viitasalo & Katajisto 1994, Heiskanen & Tallberg 1999, and the sediment was allowed to settle overnight. Hatching of ephippia introduced to a depth of 0.5 to 1 cm should be inhibited (cf.…”

Section: Methodsmentioning

confidence: 99%

“…Burial of ephippia under 0.5 to 1 cm of sediment in the BE, simulating a rapid sediment accumulation of the northern Baltic waters (Viitasalo & Katajisto 1994, Heiskanen & Tallberg 1999, possibly made them more available for Monoporeia (feeding on the top few centimetres) than for Macoma (collecting food mainly at the surface). In the BE, the amphipod density (1950 ind.…”

Section: Effects Of Zoobenthos On Ephippia In Sedimentmentioning

confidence: 99%

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Effects of bioturbation by three macrozoobenthic species and predation by necto-benthic mysids on cladoceran benthic eggs

Viitasalo¹

2007

Mar. Ecol. Prog. Ser.

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The effects of bioturbation and predation by the amphipod Monoporeia affinis, the bivalve Macoma balthica and the polychaetes Marenzelleria spp. were studied on the number, vertical distribution and hatching of benthic eggs (ephippia) of the cladoceran Bosmina longispina maritima. It was hypothesised that the 3 functionally different macrobenthic species affect Bosmina ephippia to different degrees. In addition, it was hypothesised that macrofaunal bioturbation either inhibits or enhances predation by the necto-benthic mysid Mysis mixta on cladoceran benthic eggs. M. affinis and M. balthica caused a 48 and 23% decrease in the total number of Bosmina ephippia, respectively, indicating egg predation. In addition, M. balthica extended the distribution of eggs into deeper sediment layers. Both M. affinis and M. balthica suppressed the daily hatching rate of Bosmina, and the effect of the bivalves (reduction 92%) was stronger than that of the amphipods (34 to 78%). None of the benthic species promoted the predation of mysids on Bosmina eggs. Instead, both M. affinis and M. balthica reduced the number of ephippia in the sediment surface (by 79 and 43%, respectively), implying that these species decrease the ability of mysids to feed on cladoceran benthic eggs. M. balthica was the most harmful species for the recruitment of Bosmina, whereas the nonindigenous Marenzelleria spp. did not affect ephippia.

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“…In May and August, the validity of the IPT at this coastal site was evaluated by testing 9 a major assumption behind the method, namely the independency of the rate of 10 denitrification of the 15 NO 3 -concentration used in the incubations (Nielsen, 1992). 11…”

mentioning

confidence: 99%

Seasonal and short-term variation in denitrification and anammox at a coastal station on the Gulf of Finland, Baltic Sea

Hietanen

Kuparinen

2007

Hydrobiologia

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1 2 Benthic processes were measured at a coastal deposition area in the northern Baltic 3 Sea, covering all seasons. The N 2 production rates, 90-400 µmol N m -2 d -1 , were 4 highest in autumn-early winter and lowest in spring. Heterotrophic bacterial 5 production peaked unexpectedly late in the year, indicating that in addition to the 6 temperature, the availability of carbon compounds suitable for the heterotrophic 7 bacteria also plays a major role in regulating the denitrification rate. Anaerobic 8 ammonium oxidation (anammox) was measured in spring and autumn and contributed 9 10% and 15%, respectively, to the total N 2 production. The low percentage did, 10

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Sedimentation and particulate nutrient dynamics along a coastal gradient from a fjord-like bay to the open sea

Cited by 29 publications

References 32 publications

Polychaete assemblages on the Magellan and Weddell Sea shelves: comparative ecological evaluation

Polychaete assemblages on the Magellan and Weddell Sea shelves: comparative ecological evaluation

Effects of bioturbation by three macrozoobenthic species and predation by necto-benthic mysids on cladoceran benthic eggs

Seasonal and short-term variation in denitrification and anammox at a coastal station on the Gulf of Finland, Baltic Sea

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