Long-term monitoring data reveal pH dynamics, trends and variability in the western Gulf of Finland

Brutemark, Andreas; Engström‐Öst, Jonna; Vehmaa, Anu

doi:10.2478/s13545-011-0034-3

Cited by 32 publications

(17 citation statements)

References 12 publications

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“…In our experiment, the pH ranged from 8.13 to 8.49, which is within the expected range the species used in our study encounter in the Gulf of Finland, Baltic Sea , and is lower than the pH values that cease exponential phase of various microalgae . It is therefore unlikely that pH is an important factor influencing the observed changes in growth and toxin levels in our experiment.…”

Section: Discussionsupporting

confidence: 58%

Does the presence of zooplankton influence growth and toxin production ofNodularia spumigena?

Brutemark

Engström‐Öst

2013

Internat. Rev. Hydrobiol.

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The ecological role of toxin production in cyanobacteria is still unknown. Here, we studied the potential effect of different zooplankton taxa and density on growth and toxin production of the cyanobacterium Nodularia spumigena. In this experiment, N. spumigena was exposed to three different zooplankton taxa: Rotifera (Synchaeta baltica), Copepoda (Eurytemora affinis) and Cladocera (Daphnia magna) and as a comparison a zooplankton free control. We used false bottom chambers separating the cyanobacterium and zooplankton and were thereby able to prevent direct grazing. Overall, N. spumigena toxin levels (nodularin expressed as microcystin equivalents) were significantly lower when exposed to the different zooplankton compared to the zooplankton free control, whereas no effects could be detected on N. spumigena growth and biomass. Although we did not test the underlying mechanism, these findings suggest that the presence of zooplankton reduce toxin production in N. spumigena, independent of growth. Therefore, toxin production in N. spumigena should not be considered an induced defence mechanism against zooplankton, at least not on a short‐term basis.

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Section: Discussionsupporting

confidence: 58%

Does the presence of zooplankton influence growth and toxin production ofNodularia spumigena?

Brutemark

Engström‐Öst

2013

Internat. Rev. Hydrobiol.

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“…; Gulf of Finland, Brutemark et al. ). Further, these pH values have previously been used in experimental settings on fish behaviour (Heuschele & Candolin ; Munday et al.…”

Section: Methodsmentioning

confidence: 99%

Altered Oceanic pH Impairs Mating Propensity in a Pipefish

Sundin¹,

Rosenqvist

Berglund³

2012

Ethology

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Anthropogenic disturbance is currently altering the environment of terrestrial as well as aquatic organisms. Those changes affect a variety of animal behaviours, which in turn may cause changes in species interactions, population dynamics and evolutionary processes. In marine ecosystems, nutrient enrichment may elevate pH, while it is reduced by carbon dioxide‐induced ocean acidification. These two processes are not expected to balance one another but rather to affect the environment at different times and scales. We here show experimentally that an increase in water pH has a negative effect on mating propensity in the broad‐nosed pipefish Syngnathus typhle, whereas lowered pH did not elicit the same detrimental effect. This study provides, to our knowledge, the first evidence that mating propensity is impaired by an increase in pH, suggesting that anthropogenic nutrient enrichment in aquatic ecosystems may change the processes of sexual selection and population dynamics solely on the basis of altered water pH.

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“…Fluctuations in pH caused by periodic phytoplankton blooms are common in hypereutrophic coastal areas, with pH values approaching 9 or more (Brutemark et al, 2011;Provoost et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Development of phytoplankton communities: Implications of nutrient injections on phytoplankton composition, pH and ecosystem production

Jakobsen

Blanda

Stæhr

et al. 2015

Journal of Experimental Marine Biology and Ecology

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Long-term monitoring data reveal pH dynamics, trends and variability in the western Gulf of Finland

Cited by 32 publications

References 12 publications

Does the presence of zooplankton influence growth and toxin production ofNodularia spumigena?

Does the presence of zooplankton influence growth and toxin production ofNodularia spumigena?

Altered Oceanic pH Impairs Mating Propensity in a Pipefish

Development of phytoplankton communities: Implications of nutrient injections on phytoplankton composition, pH and ecosystem production

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