Plankton distribution during a coastal upwelling event off Hiiumaa, Baltic Sea: impact of short-term flow field variability

Nõmmann, Sulev; Sildam, Juri; Nõges, Tiina; Kahru, Mati

doi:10.1016/0278-4343(91)90037-7

Cited by 12 publications

(5 citation statements)

References 17 publications

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“…Dissolved silicate (DSi) concentrations were determined using standard colorimetric techniques at the micromolar level using a nutrient autoanalyser (Seal Analytical, Quattro). Nanomolar levels of dissolved nitrate + nitrite (hereafter nitrate) and dissolved inorganic phosphate (DIP) were determined with a colorimetric method using a 2 m liquid waveguide capillary cell (LWCC) (Patey et al, 2008;Zhang and Chi, 2002) with a miniaturised detector (Ocean Optics Ltd). Detection limits were 2 nmol L −1 for nitrate and 1 nmol L −1 for DIP, with a linear range up to 300 nmol L −1 .…”

Section: Dissolved Inorganic Nutrientsmentioning

confidence: 99%

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

et al. 2015

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Abstract. Ocean acidification is expected to influence plankton community structure and biogeochemical element cycles. To date, the response of plankton communities to elevated CO 2 has been studied primarily during nutrient-stimulated blooms. In this CO 2 manipulation study, we used largevolume (∼ 55 m 3 ) pelagic in situ mesocosms to enclose a natural summer, post-spring-bloom plankton assemblage in the Baltic Sea to investigate the response of organic matter pools to ocean acidification. The carbonate system in the six mesocosms was manipulated to yield average f CO 2 ranging between 365 and ∼ 1230 µatm with no adjustment of naturally available nutrient concentrations. Plankton community development and key biogeochemical element pools were subsequently followed in this nitrogen-limited ecosystem over a period of 7 weeks. We observed higher sustained chlorophyll a and particulate matter concentrations (∼ 25 % higher) and lower inorganic phosphate concentrations in the water column in the highest f CO 2 treatment (1231 µatm) during the final 2 weeks of the study period (Phase III), when there was low net change in particulate and dissolved matter pools. Size-fractionated phytoplankton pigment analyses indicated that these differences were driven by picophytoplankton (< 2 µm) and were already established early in the experiment during an initial warm and more productive period with overall elevated chlorophyll a and particulate matter concentrations. However, the influence of picophytoplankton on bulk organic matter pools was masked by high biomass of larger plankton until Phase III, when the contribution of the small size fraction (< 2 µm) increased to up to 90 % of chlorophyll a. In this phase, a CO 2 -driven increase in water column particulate carbon did not lead to enhanced sinking material flux but was instead reflected in increased dissolved organic carbon concentrations. Hence ocean acidification may induce changes in organic matter partitioning in the upper water column during the low-nitrogen summer period in the Baltic Sea.

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Section: Dissolved Inorganic Nutrientsmentioning

confidence: 99%

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

et al. 2015

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“…) A Systems Analysis of the Baltic Sea © Springer-Verlag Berlin Heidelberg 2001 178 A. Hagstrom et aI. productivity and biogeochemistry over large areas (Nommann et al 1991). Thus, predictions of the future for the Baltic, and the management strategies, need to distinguish between the effects of climate change and anthropogenic loading and to give full attention to both.…”

Section: Introductionmentioning

confidence: 98%

“…The distribution of these events depends largely on the bottom topography. Nommann et al (1991) demonstrated the importance of coastal upwellings for the productivity of the Baltic near-shore ecosystems in the summer stage. These authors found a fast biological response to upwelling resulting in enhanced primary production and a A much more subtle effect of mixing is caused by breaking internal waves or shear-induced turbulence.…”

mentioning

confidence: 98%

Pelagic Plankton Growth and Resource Limitations in the Baltic Sea

Hagström¹,

Azam²,

Kuparinen³

et al. 2001

Ecological Studies

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“…These blooms are seldom reported, since an oceanographic vessel in a local storm does not usually have the time to hang around for the several days required for the appearance of the bloom. In recent years, however, this phenomenon has been remarked upon in a number of papers (Abbott et al, 1990;Nömmann et al, 1991;Chang et al, 1996;Moline and Prézelin, 1996;Yin et al, 1997). as Goldman (1993) has pointed out, such blooms can amount to an appreciable fraction of the yearly productivity.…”

Section: Discontinuities In Timementioning

confidence: 99%

Methods of sampling and analysis and our concepts of ocean dynamics

Wangersky¹

2005

Sci. Mar.

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SUMMARY: In the last two decades, the increase in multi-nation, multi-ship projects has underlined the importance of intercalibration and intercomparison studies. At the same time, it is becoming obvious that with our present methods of sampling and analysis we can never hope to distinguish the variability in our sampling and analysis techniques from the variability in the universe sampled. The presence of discontinuities in many of the quantities measured suggests that our sampling grid, as maintained by oceanographic vessels, is too limited both in space and in time. Some variety of self-reporting sampling buoy is the obvious answer for physical and chemical parameters, although as yet we do not have detectors for many of the quantities of interest. Even with such buoys, it would seem unlikely that we could construct a grid of such buoys tight enough to measure the local variability of the oceans without the buoys themselves contributing to this variability. The limit finally selected for such a sampling grid will probably be some compromise between scientific capability and economic reality. -En las dos últi-mas décadas el incremento de los proyectos multi-nacionales, con la utilización de muchos barcos ha subrayado la importancia de inter-calibración y comparación de estudios. Al mismo tiempo es obvio que con los métodos actuales de muestreo

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Plankton distribution during a coastal upwelling event off Hiiumaa, Baltic Sea: impact of short-term flow field variability

Cited by 12 publications

References 17 publications

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

Pelagic Plankton Growth and Resource Limitations in the Baltic Sea

Methods of sampling and analysis and our concepts of ocean dynamics

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Plankton distribution during a coastal upwelling event off Hiiumaa, Baltic Sea: impact of short-term flow field variability

Cited by 12 publications

References 17 publications

Effect of elevated CO&lt;sub&gt;2&lt;/sub&gt; on organic matter pools and fluxes in a summer Baltic Sea plankton community

Effect of elevated CO&lt;sub&gt;2&lt;/sub&gt; on organic matter pools and fluxes in a summer Baltic Sea plankton community

Pelagic Plankton Growth and Resource Limitations in the Baltic Sea

Methods of sampling and analysis and our concepts of ocean dynamics

Contact Info

Product

Resources

About

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community

Effect of elevated CO<sub>2</sub> on organic matter pools and fluxes in a summer Baltic Sea plankton community