Phytoplankton community responses to nutrient and iron enrichment under different nitrogen to phosphorus ratios in the northern Baltic Sea

Vuorio, Kristiina; Lagus, Annika; Lehtimäki, Jaakko; Suomela, Jukka‐Pekka; Helminen, Harri

doi:10.1016/j.jembe.2005.02.006

Cited by 55 publications

(41 citation statements)

References 46 publications

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“…According to both pigment and microscopic data, the large diatoms and haptophytes benefited the most from aerosol deposition. This result is consistent with the observations of many nutrient enrichment experiments, which showed that diatoms become the dominant phytoplankton after the addition of N or Fe (Vuorio et al, 2005;Boyd et al, 2007), due to the ability of better equipped and rapid response to the injections of new nutrients (Goldman, 1993;Zubkov et al, 1998) and escaping grazing pressure (Boyd et al, 2007). Some species with high growth capability under enhanced nutrient availability, e.g.…”

Section: Different Responses Of Pico-and Micro-phytoplankton and Amonsupporting

confidence: 88%

“…It has been reported that the Fe concentration in SCS was only about 0.2-0.3 nM, which is similar to that in the central North Pacific (Wu et al, 2003). Some studies suggested that even though the total phytoplankton production was not Fe limited or ambient concentrations of dissolved Fe were relatively high (0.40-0.45 nM), phytoplankton community structure could still be affected by the availability of Fe (Blain et al, 2004;Vuorio et al, 2005). It is also possible that other aerosol-derived components (e.g.…”

Section: Positive and Negative Responses Of Bulk Phytoplankton Biomasmentioning

confidence: 99%

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Dynamics of phytoplankton community structure in the South China Sea in response to the East Asian aerosol input

Guo

Wang

et al. 2012

Biogeosciences

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Abstract. Recent studies have demonstrated atmospheric deposition as an important source of bioreactive compounds to the ocean. The South China Sea (SCS), where aerosol loading is among the highest in the world, however, is poorly studied, particularly on the in situ response of phytoplankton community structures to atmospheric deposition. By conducting a series of microcosm bioassays at different hydrographical locations and simulating different aerosol event scales, we observed both positive and negative responses to the input of East Asian (EA) aerosol with high nitrogen (N) and trace metal contents, in terms of biomass, composition and physiological characteristics of phytoplankton communities. High levels of aerosol loading relieved phytoplankton nitrogen and trace metal limitations in SCS, and thus increased total phytoplankton biomass, enhanced their physiological indicators (e.g. photosynthetic efficiency) and shifted phytoplankton assemblages from being dominated by picoplankton to microphytoplanton, especially diatoms. However, under low levels of aerosol loading, the composition shift and biomass accumulation were not apparent, suggesting that the stimulation effects might be counterbalanced by enhanced grazing mortality indicated by increased abundance of protist grazers. Trace metal toxicity of the aerosols might also be the reason for the reduction of picocyanobacteria when amended with high EA aerosols. The magnitude and duration of the deposition event, as well as the hydrographical and trophic conditions of receiving waters are also important factors when predicting the influence of an aerosol deposition event. Our results demonstrated different responses of phytoplankton and microbial food web dynamics to different scales of atmospheric input events in SCS and highlighted the need for achieving an accurate comprehension of atmospheric nutrient on the biogeochemical cycles of the oceans.

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Section: Different Responses Of Pico-and Micro-phytoplankton and Amonsupporting

confidence: 88%

Section: Positive and Negative Responses Of Bulk Phytoplankton Biomasmentioning

confidence: 99%

Dynamics of phytoplankton community structure in the South China Sea in response to the East Asian aerosol input

Guo

Wang

et al. 2012

Biogeosciences

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“…The regeneration from sediment and water column and wet deposition could not provide enough DRSi for diatom blooms. Nutrient limitations in coastal waters may seasonally and spatially switch between nitrogen and phos- phorus limitation in response to variable nutrient inputs (Vuorio et al, 2005;Howarth and Marino, 2006;Jurgensone et al, 2011). In Sishili Bay, anthropogenic inputs also relieved DRSi limitations to a great extent, especially in the first 3 months of 2010.…”

Section: Nutrient Limitations In the Study Areamentioning

confidence: 99%

Temporal and spatial distributions of nutrients under the influence of human activities in Sishili Bay, northern Yellow Sea of China

Wang

Chen

Dong

et al. 2012

Marine Pollution Bulletin

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“…Although the TN: TP atomic ratios required by phytoplankton are about 16N: 1P (REDFIELD, 1958), the nutritional requirements of each species may vary according to its rates of absorption, assimilation and nutrient storage capacity (VUORIO et al, 2005). In our study, the CCA suggested that TN concentration rather than the N: P ratio was the key factor to stimulate growth and taxonomic composition of phytoplankton assemblages in all the four estuaries in both seasons.…”

Section: Discussionmentioning

confidence: 54%

Influence of river discharge on phytoplankton structure and nutrient concentrations in four tropical semiarid estuaries

2016

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This study evaluated changes in phytoplankton and nutrients after an increase in river discharge in four estuaries of northeastern Brazil. Samples were taken during a markedly freshwater-deprived period (Nov/2010, dry season), and during a rainy season (May/2011). While two estuaries are located in urban areas (Ceará -CE and Cocó -CO), the others are markedly freshwater-deprived (Pacoti -PAC and Pirangi -PIR). Our findings indicate that increased freshwater had opposing effects on estuaries impacted by anthropogenic discharges (CO, CE and PIR) compared with the other, less impacted (PAC). In CO and CE, the freshwater flow during the rainy period had a nutrient diluting effect and controlled phytoplankton blooms. In PIR, only phosphorus and inorganic nitrogen decreased in the rainy season. In contrast, an increase of all nutrients was observed in PAC, and of TN in PIR, followed by an increase in phytoplankton biomass. In the rainy season, eutrophic freshwater species dominated in all the estuaries. In the dry season, blooms of Cryptomonas/Rhodomonas and Synechocystis aquatilis were, respectively, observed in CE and CO. Also in the dry season, PAC and PIR had a predominance of marine species under a condition of hypersalinity. Canonical correspondence analysis suggested the variation observed for salinity, silica, and TN are the main driver of phytoplankton structure. AbstrAct

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Phytoplankton community responses to nutrient and iron enrichment under different nitrogen to phosphorus ratios in the northern Baltic Sea

Cited by 55 publications

References 46 publications

Dynamics of phytoplankton community structure in the South China Sea in response to the East Asian aerosol input

Dynamics of phytoplankton community structure in the South China Sea in response to the East Asian aerosol input

Temporal and spatial distributions of nutrients under the influence of human activities in Sishili Bay, northern Yellow Sea of China

Influence of river discharge on phytoplankton structure and nutrient concentrations in four tropical semiarid estuaries

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