Erratum to “Phytoplankton size structure and primary production in a highly dynamic coastal ecosystem (Ría de Vigo, NW-Spain): Seasonal and short-time scale variability” [Estuar. Coast. Shelf Sci. 67 (2006) 251–266]

2006 ◽  
Vol 70 (1-2) ◽  
pp. 333
Author(s):  
Pedro Cermeño ◽  
Emilio Marañón ◽  
Valesca Pérez ◽  
Pablo Serret ◽  
Emilio Fernández ◽  
...  
Keyword(s):  
Primary Production ◽  
Time Scale ◽  
Size Structure ◽  
Coastal Ecosystem ◽  
Short Time Scale ◽  
Nw Spain ◽  
Ría De Vigo ◽  
Phytoplankton Size ◽  
Short Time ◽  
Phytoplankton Size Structure

SHORT-TIME SCALE DEVELOPMENT OF A GYMNODINIUM CATENATUM POPULATION IN THE RIA DE VIGO (NW SPAIN)1

1996 ◽  
Vol 32 (2) ◽  
pp. 212-221 ◽  
Author(s):  
Eglee Gomez Fermin ◽  
Francisco G. Figueiras ◽  
Belen Arbones ◽  
Maria Luisa Villarino
Keyword(s):  
Scale Development ◽  
Time Scale ◽  
Short Time Scale ◽  
Nw Spain ◽  
Ría De Vigo ◽  
Short Time ◽  
Gymnodinium Catenatum

Size-fractionated surface phytoplankton in the Kara and Laptev Seas: environmental control and spatial variability

2021 ◽  
Vol 664 ◽  
pp. 59-77
Author(s):  
AB Demidov ◽  
IN Sukhanova ◽  
TA Belevich ◽  
MV Flint ◽  
VI Gagarin ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Primary Production ◽  
Water Temperature ◽  
Environmental Control ◽  
Size Structure ◽  
Total Carbon ◽  
The Arctic ◽  
Size Groups ◽  
Phytoplankton Size ◽  
Phytoplankton Size Structure

Climate-induced variability of phytoplankton size structure influences primary productivity, marine food web dynamics, biosedimentation and exchange of CO2 between the atmosphere and ocean. Investigation of phytoplankton size structure in the Arctic Ocean is important due to rapid changes in its ecosystems related to increasing temperature and declining sea ice cover. We estimated the contribution of surface micro-, nano- and picophytoplankton to the total carbon biomass, chlorophyll a concentration and primary production in the Kara and Laptev Seas and investigated the relationships of these phytoplankton size groups with environmental factors which determine their spatial variability. Additionally, we compared chlorophyll specific carbon fixation rate, specific growth rate and carbon to chlorophyll ratios among different phytoplankton size groups. The investigation was carried out from August to September 2018. Generally, picophytoplankton was dominant in terms of chlorophyll a and primary production in the whole study area. The spatial variability of phytoplankton size classes was influenced by river discharge and relied mainly on water temperature, salinity and dissolved silicon concentration. Microphytoplankton prevailed across the river runoff region under conditions of low salinity and relatively high water temperature, while picophytoplankton was predominant under conditions of high salinity and low water temperature. Our study is the first to characterize size-fractionated phytoplankton abundance in the Kara and Laptev Seas, and provides a baseline for future assessment of the response of Kara and Laptev Sea ecosystems to climate-induced processes using phytoplankton size structure.

scholarly journals Phytoplankton size structure, distribution, and primary production as the basis for trophic analysis of Caribbean ecosystems

2010 ◽  
Vol 68 (4) ◽  
pp. 751-765 ◽  
Author(s):  
Marie-Hélène Forget ◽  
Trevor Platt ◽  
Shubha Sathyendranath ◽  
Paul Fanning
Keyword(s):  
Primary Production ◽  
Annual Cycle ◽  
Size Structure ◽  
Marine Ecosystem ◽  
Chlorophyll Concentration ◽  
Remotely Sensed ◽  
Remotely Sensed Data ◽  
Phytoplankton Size ◽  
Trophic Analysis ◽  
Phytoplankton Size Structure

Abstract Forget, M-H., Platt, T., Sathyendranath, S., and Fanning, P. 2011. Phytoplankton size structure, distribution, and primary production as the basis for trophic analysis of Caribbean ecosystems. – ICES Journal of Marine Science, 68: 751–765. An oceanographic survey was conducted in Caribbean waters in April and May 2006 to assess the marine ecosystem in the context of a trophic analysis of the foodweb. Analyses of pigment and absorption data revealed that the phytoplankton community was dominated by pico- and nanophytoplankton, particularly at the deep chlorophyll maximum. Based on cluster analysis of remotely sensed data, three dynamic provinces were defined for the region. A 5-year time-series of sea surface temperature and chlorophyll concentration provided information on the annual cycle of these properties. To implement the computation of primary production on a synoptic scale, parameters characterizing the biomass profiles and photosynthesis–irradiance relationships were assigned using four protocols: two regional approaches, a regression with surface chlorophyll, and the nearest-neighbour method (NNM), which has the advantage of assigning parameters on a pixel-by-pixel basis. Monthly images of primary production were computed over an annual cycle using MODIS chlorophyll a concentration. The NNM and the use of dynamic provinces emerged as the methods of choice for parameter assignment. Finally, a new approach from remotely sensed data was developed to estimate production-to-carbon ratios, a key input to Ecopath models. The results contribute to ecotrophic analysis of the Lesser Antilles Pelagic Ecosystem project.

scholarly journals Long to short time-scale factors in rocky coasts change in the NW Spain

2008 ◽  
pp. 11-16
Author(s):  
R. Blanco Chao ◽  
M. Valcárcel Díaz ◽  
M. Costa Casais ◽  
A. Pérez Alberti
Keyword(s):  
Sea Level ◽  
Time Scale ◽  
Short Time Scale ◽  
Nw Spain ◽  
The Past ◽  
Scale Factors ◽  
Wide Range ◽  
Rocky Coasts ◽  
Short Time ◽  
Land Changes

Processes in rocky coasts operates in a wide range of time-scales, from seconds to millennia, but sealeveloscillations probably are the most significant changes. A portion of land changes from coastal tocontinental environment as sea-level rise or fall, and, although a re-occupied coast is never the same, itcan conserve a memory of the previous morphodynamic states. This memory of the system implies thatthe processes that operated in the past exert a large influence on present processes. This is a veryimportant factor in the evolution and present dynamics of rocky coasts, in which many erosive andsedimentary landforms are fully or partially inherited.

An Alternative Test Using Algal Cultures for Testing Chemicals for Toxicity

1993 ◽  
Vol 21 (2) ◽  
pp. 196-201
Author(s):  
Søren Achim Nielsen ◽  
Thomas Hougaard
Keyword(s):  
Size Distribution ◽  
Mitotic Activity ◽  
Time Scale ◽  
Test System ◽  
Short Time Scale ◽  
Toxic Substances ◽  
Alternative Test ◽  
Short Time ◽  
Algal Cultures ◽  
Test Cultures

An alternative test is presented, in which algal cultures are used for testing toxic substances. This test system is based on variations in the size distribution of cells in test cultures as a measurement of growth. Thus, inhibition of mitotic activity is used as a measurement for toxic effects. The test can be performed on a short time-scale and is very sensitive to even weak toxic doses.

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