Micropatchiness, turbulence and recruitment in plankton

Davis, Cabell S.; Flierl, Glenn R.; Wiebe, Peter H.; Franks, P. J. S.

doi:10.1357/002224091784968602

Cited by 138 publications

(90 citation statements)

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“…The spatial distribution of phytoplankton at sea is a result of complex interactions between physical and biological processes (Davis et al, 1991;Abraham, 1998). In addition to the vertical nutrient fluxes, phytoplankton biomass and productivity of the nSCS are influenced by growth-grazing dynamics (Chen, 2005;Huang et al, 2011;Zhou et al, 2011;Chen et al, 2013).…”

Section: Q P LI Et Al: Phytoplankton Dynamics Driven By Vertical Nmentioning

confidence: 99%

Phytoplankton dynamics driven by vertical nutrient fluxes during the spring inter-monsoon period in the northeastern South China Sea

Dong

Wang

2016

Biogeosciences

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Abstract.A field survey from the coastal ocean zones to the offshore pelagic zones of the northeastern South China Sea (nSCS) was conducted during the inter-monsoon period of May 2014 when the region was characterized by prevailing low-nutrient conditions. Comprehensive field measurements were made for not only hydrographic and biogeochemical properties but also phytoplankton growth and microzooplankton grazing rates. We also performed estimations of the vertical turbulent diffusivity and diffusive nutrient fluxes using a Thorpe-scale method and the upwelling nutrient fluxes by Ekman pumping using satellite-derived wind stress curl. Our results indicated a positive correlation between the integrated phytoplankton chlorophyll a and vertical nutrient fluxes in the offshore region of the nSCS during the study period. We generally found an increasing role of turbulent diffusion but a decreasing role of curl-driven upwelling in vertical transport of nutrients from the coastal ocean zones to the offshore pelagic zones. Elevated nutrient fluxes near Dongsha Islands supported high new production leading to net growth of the phytoplankton community, whereas the low fluxes near the southwest of Taiwan had resulted in a negative net community growth leading to decline of a surface phytoplankton bloom. Overall, phytoplankton dynamics in the large part of the nSCS could be largely driven by vertical nutrient fluxes including turbulent diffusion and curl-driven upwelling during the spring inter-monsoon period.

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Section: Q P LI Et Al: Phytoplankton Dynamics Driven By Vertical Nmentioning

confidence: 99%

Phytoplankton dynamics driven by vertical nutrient fluxes during the spring inter-monsoon period in the northeastern South China Sea

Dong

Wang

2016

Biogeosciences

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“…Hence, other factors such as turbulence, which has been shown to increase clearance rates upon ciliates by as much as a factor of 4 (Saiz & Kiørboe 1995, Caparroy et al 1998, and organismal aggregation in patches (Mackas et al 1985, George 1989, Davis et al 1991, Montagnes et al 1999) could be involved.…”

Section: Winter Scenariomentioning

confidence: 99%

Copepod egg production in the NW Mediterranean: effects of winter environmental conditions

Calbet

Saiz²,

Alcaraz³

2002

Mar. Ecol. Prog. Ser.

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In the NW Mediterranean the highest abundance of phytoplankton is found during late winter, when temperatures are low. During summer, on the other hand, temperatures are high and phytoplankton abundance low, resulting in low copepod egg production rates (EPR). Despite the apparently better food conditions for copepod growth during winter, we lack information on copepod EPR during the cold season and on the possible effect temperature has on inhibiting this metabolic rate. To solve this uncertainty, a study was carried out to assess the effects exerted by the winter environmental conditions on the EPR of 3 representative planktonic copepod species of the NW Mediterranean (Centropages typicus, Clausocalanus lividus, Acartia clausi). The data were collected during 2 oceanographic cruises in March 1999 (Hivern-99) and January-February 2000 (Hivern-00) and the results compared to those of typical summer conditions. During the Hivern-99 cruise the phytoplankton abundance was very high (ranging from 1 to 1.5 µg > 5 µm chlorophyll a [chl a] l -1 ), indicating bloom conditions. During the Hivern-00, the phytoplankton bloom had not yet developed, evident by the chl a concentration of ~0.5 µg l -1. The recorded EPR during Hivern-99 were amongst the highest for the studied species, and the clearance rates deduced from them indicate a shorter (phytoplankton -copepods) food web during the winter phytoplankton bloom than for the rest of the year, when the planktonic trophic interactions take place through a longer microbial food web.KEY WORDS: Zooplankton · Copepod · Egg production · Centropages · Clausocalanus · Acartia · Mediterranean · Winter · Summer · Density front · Physical-biological coupling Resale or republication not permitted without written consent of the publisher

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“…At the mesoscale, variability is dominated by fronts and eddies 59,60 and at scales below this, variability becomes a function of biological behavior interacting with physical processes such as turbulence and mixing. 61,62 Clearly it is not possible to study the microscale processes, involving turbulence and mixing, with a satellite sensor that has a spatial resolution of ca. 1 km.…”

Section: Biophysical Interactionsmentioning

confidence: 99%

Biological Oceanography by Remote Sensing

Srokosz

2000

Encyclopedia of Analytical Chemistry

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Biological oceanography may be studied from space using sensors on satellites that determine the color of the ocean. The presence of phytoplankton (microscopic algae) in the upper layers of the ocean changes the color of the water as seen from above. In simplified terms, this is due to the selective absorption of blue light by the phytoplankton pigments (primarily chlorophyll) which changes the appearance of the water from blue to green. These changes in color can be observed using a satellite‐borne spectroradiometer that measures the water‐leaving radiance in a number of bands in the visible part of the electromagnetic spectrum. The limitations of the technique are first, that only information on the phytoplankton in the upper layers of the ocean can be obtained (light does not penetrate very far into the ocean). Second, most of the signal measured by the satellite sensor originates in the atmosphere (due to the molecular and aerosol scattering of photons there), so careful correction for atmospheric effects is necessary if good ocean data are to be obtained. Of course, in the presence of clouds the sensor will not “see” the ocean surface at all, and no data will be obtained. Third, only one component of the ocean ecosystem, namely the phytoplankton, can be studied by this means. Despite these limitations, satellite observations of ocean color have given new insights into biological oceanography on a global scale that could not have been obtained by any other means of observation. Observations of ocean color have contributed to a better understanding of the biophysical interactions that determine the phytoplankton productivity, the seasonal and interannual variations of the phytoplankton biomass on global scales, and the role of phytoplankton in the climate system. They have also contributed to the improved modeling of biogeochemical processes in the ocean.

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Micropatchiness, turbulence and recruitment in plankton

Cited by 138 publications

References 0 publications

Phytoplankton dynamics driven by vertical nutrient fluxes during the spring inter-monsoon period in the northeastern South China Sea

Phytoplankton dynamics driven by vertical nutrient fluxes during the spring inter-monsoon period in the northeastern South China Sea

Copepod egg production in the NW Mediterranean: effects of winter environmental conditions

Biological Oceanography by Remote Sensing

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