Life Cycle of a New Bosminid Cladocera: Bosmina (Bosmina) tripurae (Korinek, Saha, and Bhattacharya, 1999)

Biswas, Anamika; Saha, Ratan K.; Sengupta, Atanu; Saha, Himadri

doi:10.1007/s40011-014-0311-1

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Filter-feeding cladocerans directly feed on bacteria and flagellates and effectively transfer carbon from the microbial loop to higher trophic levels. In the eastern and western Gulf of Finland, as well as in the southern Baltic Sea, Bosmina longispina can be the dominant prey for herring (Clupea harengus), sprat (Sprattus sprattus), and threespined stickleback (Gasterosteus aculeatus) (Casini et al, 2004;Peltonen et al, 2004). Larger herring feed more on Mysids during autumn, which in turn can effectively prey on cladocerans, including Bosmina sp.…”

Section: Predator-prey Relationshipsmentioning

confidence: 99%

Ciliate and mesozooplankton community response to increasing CO2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment

et al. 2017

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Abstract. Community approaches to investigating ocean acidification (OA) effects suggest a high tolerance of micro- and mesozooplankton to carbonate chemistry changes expected to occur within this century. Plankton communities in the coastal areas of the Baltic Sea frequently experience pH variations partly exceeding projections for the near future both on a diurnal and seasonal basis. We conducted a large-scale mesocosm CO2 enrichment experiment ( ∼  55 m3) enclosing the natural plankton community in Tvärminne–Storfjärden for 8 weeks during June–August 2012 and studied community and species–taxon response of ciliates and mesozooplankton to CO2 elevations expected for this century. In addition to the response to fCO2, we also considered temperature and chlorophyll a variations in our analyses. Shannon diversity of ciliates significantly decreased with fCO2 and temperature with a greater dominance of smaller species. The mixotrophic Myrionecta rubra seemed to indirectly and directly benefit from higher CO2 concentrations in the post-bloom phase through increased occurrence of picoeukaryotes (most likely Cryptophytes) and Dinophyta at higher CO2 levels. With respect to mesozooplankton, we did not detect significant effects for either total abundance or for Shannon diversity. The cladocera Bosmina sp. occurred at distinctly higher abundance for a short time period during the second half of the experiment in three of the CO2-enriched mesocosms except for the highest CO2 level. The ratio of Bosmina sp. with empty to embryo- or resting-egg-bearing brood chambers, however, was significantly affected by CO2, temperature, and chlorophyll a. An indirect CO2 effect via increased food availability (Cyanobacteria) stimulating Bosmina sp. reproduction cannot be ruled out. Although increased regenerated primary production diminishes trophic transfer in general, the presence of organisms able to graze on bacteria such as cladocerans may positively impact organic matter transfer to higher trophic levels. Thus, under increasing OA in cladoceran-dominated mesozooplankton communities, the importance of the microbial loop in the pelagic zone may be temporarily enhanced and carbon transfer to higher trophic levels may be stimulated.

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Section: Predator-prey Relationshipsmentioning

confidence: 99%

Ciliate and mesozooplankton community response to increasing CO2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment

et al. 2017

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Micro- and mesozooplankton community response to increasing CO2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment

Lischka¹,

Bach²,

Schulz³

et al. 2015

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Abstract. Community approaches investigating ocean acidification (OA) effects suggest a high tolerance of micro- and mesozooplankton to carbonate chemistry changes expected to occur within this century. Plankton communities in the coastal areas of the Baltic Sea frequently experience pH variations partly exceeding projections for the near future both on a diurnal and seasonal basis, thus some level of tolerance/adaptation may be expected. We conducted a large-scale mesocosm CO2 enrichment experiment (~ 55 m3) enclosing the natural plankton community in Tvärminne/Storfjärden for eight weeks during June–August 2012 and studied community and species/taxon response of microzooplankton (ciliates) and mesozooplankton to CO2 elevations expected for this century. Besides the response to fCO2 and associate changes in carbonate chemistry speciation, we also considered temperature and chlorophyll a variations in our analyses. Shannon diversity of microzooplankton significantly decreased with fCO2 and temperature with a greater dominance of smaller species. Small sized ciliates (Myrionecta rubra, Balanion comatum, Strombidium cf. epidemum, Strobilidium sp.) showed significant relations with one or more of the factors. The phototrophic Myrionecta rubra seemed to directly benefit from higher CO2 concentrations and showed increased abundance in the pre-bloom phase. With respect to meszooplankton, we neither detected significant effects for total abundance nor for Shannon diversity. The cladocera Bosmina occurred at distinctly higher abundance (more than twice as high compared to the control mesocosms) for a short time period during the second half of the experiment in three of the CO2-enriched mesocosms except for the highest CO2 level. The ratio of Bosmina with empty to embryo/resting egg bearing brood chambers, however, was significantly affected by all three factors. An indirect CO2 effect via increased food availability stimulating Bosmina reproduction is suggested, but too low sampling frequency of this highly flexible organism probably entailed proving a significant relation with fCO2. Filter-feeding cladocerans effectively transfer microbial loop carbon to higher trophic levels. Thus, under increasing OA in cladoceran dominated mesozooplankton communities the importance of the microbial loop in the pelagic zone may be enhanced and carbon transfer to higher trophic levels stimulated.

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Life Cycle of a New Bosminid Cladocera: Bosmina (Bosmina) tripurae (Korinek, Saha, and Bhattacharya, 1999)

Cited by 2 publications

References 31 publications

Ciliate and mesozooplankton community response to increasing CO<sub>2</sub> levels in the Baltic Sea: insights from a large-scale mesocosm experiment

Ciliate and mesozooplankton community response to increasing CO<sub>2</sub> levels in the Baltic Sea: insights from a large-scale mesocosm experiment

Micro- and mesozooplankton community response to increasing CO<sub>2</sub> levels in the Baltic Sea: insights from a large-scale mesocosm experiment

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Life Cycle of a New Bosminid Cladocera: Bosmina (Bosmina) tripurae (Korinek, Saha, and Bhattacharya, 1999)

Cited by 2 publications

References 31 publications

Ciliate and mesozooplankton community response to increasing CO&lt;sub&gt;2&lt;/sub&gt; levels in the Baltic Sea: insights from a large-scale mesocosm experiment

Ciliate and mesozooplankton community response to increasing CO&lt;sub&gt;2&lt;/sub&gt; levels in the Baltic Sea: insights from a large-scale mesocosm experiment

Micro- and mesozooplankton community response to increasing CO&lt;sub&gt;2&lt;/sub&gt; levels in the Baltic Sea: insights from a large-scale mesocosm experiment

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Ciliate and mesozooplankton community response to increasing CO<sub>2</sub> levels in the Baltic Sea: insights from a large-scale mesocosm experiment

Ciliate and mesozooplankton community response to increasing CO<sub>2</sub> levels in the Baltic Sea: insights from a large-scale mesocosm experiment

Micro- and mesozooplankton community response to increasing CO<sub>2</sub> levels in the Baltic Sea: insights from a large-scale mesocosm experiment