Uptake of phytodetritus by three ostracod species from the Baltic Sea: effects of amphipod disturbance and ostracod density

Modig, H.; Bund, Wouter van de; Ólafsson, Emil

doi:10.3354/meps202125

Cited by 21 publications

(16 citation statements)

References 41 publications

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“…ostracods) as keystone species on production and community metabolism of micro-or mesocosm freshwater beds, playing an interesting role in determining the structure of these systems (Lawrence et al 2002). In these microenvironments, ostracods compete with oligochaetes and amphipods for food sources (Modig et al 2000) and all these groups are predated by fishes or gastropods.…”

Section: Introductionmentioning

confidence: 99%

Freshwater ostracods as environmental tracers

Muñoz

Abad

Bodergat

et al. 2013

Int. J. Environ. Sci. Technol.

144

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This paper revises the response of freshwater ostracods to different environmental conditions and anthropogenic impacts, with a worldwide overview of the potential use of these microcrustaceans as bioindicators and several examples of applications in different scenarios. The development of either a single species or an ostracod assemblage is influenced by physical-chemical properties of waters (salinity, temperature, pH, dissolved oxygen), hydraulic conditions, bottom grain sizes or sedimentation rates. In addition to population and community changes, morphological and geochemical changes can also be detected in the ostracod carapace, which serves as a tracer of the water quality. All these features permit to delimit the spatial effects of urban sewages, mining effluents, agricultural wastes, watershed deforestation or road building. These data are the basis for the palaeoenvironmental reconstruction of cores, with an interesting application to archaeology. In addition, favourable results of recently developed bioassays, coupled with an important variability of local assemblages under changing conditions in both waters and sediments, suggest that these microcrustaceans may included between the most promising sentinels groups in freshwater areas. These microcrustaceans show high sensitivity to pesticides, herbicides, heavy metal pollution and oil inputs.

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Section: Introductionmentioning

confidence: 99%

Freshwater ostracods as environmental tracers

Muñoz

Abad

Bodergat

et al. 2013

Int. J. Environ. Sci. Technol.

144

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show abstract

“…Many aspects of the ecology of these amphipods have been studied, including food and feeding activity (Hill & Elmgren 1987, Lopez & Elmgren 1989, Johnson & Wiederholm 1992, Lehtonen 1994), predation (Abrams et al 1990, Sparrevik & Leonardsson 1995, interactions between year classes (Hill 1992), and interactions with meiobenthos (Ólafs-son & Elmgren 1991, Modig et al 2000. M. affinis and P. femorata are morphologically similar, but there are important ecological differences between the 2 species.…”

Section: Introductionmentioning

confidence: 99%

Effects of the coexisting Baltic amphipods Monoporeia affinis and Pontoporeia femorata on the fate of a simulated spring diatom bloom

Bund

Ólafsson²,

Modig³

et al. 2001

Mar. Ecol. Prog. Ser.

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A laboratory experiment was performed to quantify the fate of diatom phytodetritus and how this is affected by the presence of benthic amphipods. A Baltic Sea spring bloom sedimentation event was simulated by adding 14 C-labeled diatoms (Skeletonema costatum) to microcosms with varying densities of the amphipods Monoporeia affinis and Pontoporeia femorata, as well as to microcosms without amphipods, where the sediment was disturbed mechanically. After 1 mo of incubation, 51 to 77% of the added diatom carbon was still in the sediment; 2 mo later 49 to 66% remained. The effect of amphipods on the fate of the phytodetritus differed between species. At near-field density, M. affinis incorporated 6 to 11% of the added 14 C, P. femorata only 1.2%. The results indicate that burrowing slows mineralization, presumably by mixing organic material to anoxic depths in the sediment. The effect of P. femorata on mineralization could not be distinguished from the effect of mechanical stirring. M. affinis feeding and respiration resulted in a significant increase in mineralization; at low densities this compensated for the mixing effect, at high densities M. affinis feeding resulted in enhanced net mineralization.

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“…bloom (Limén and Ó lafsson 2002). These earlier studies proposed that this niche differentiation can be explained by vertical stratification in the first centimeter of the sediment and/or resource partitioning among these three species with regard to carbon pathways, with C. neglecta relying more on freshly deposited phytodetritus, while H. sorbyana and P. fennica mainly consume older, more refractory material (Ó lafsson et al 1999;Modig et al 2000). C. neglecta has been thought to have a relatively short life cycle when compared to H. sorbyana and P. fennica (Ankar and Elmgren 1976).…”

Section: Discussionmentioning

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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Uptake of phytodetritus by three ostracod species from the Baltic Sea: effects of amphipod disturbance and ostracod density

Cited by 21 publications

References 41 publications

Freshwater ostracods as environmental tracers

Freshwater ostracods as environmental tracers

Effects of the coexisting Baltic amphipods Monoporeia affinis and Pontoporeia femorata on the fate of a simulated spring diatom bloom

Settling blooms of filamentous cyanobacteria as food for meiofauna assemblages

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