In situ study of relative electron transport rates in the marine macroalga Fucus vesiculosus in the Baltic Sea at different depths and times of year

2009 ◽  
pp. 301-306
Author(s):  
N. G. A. Ekelund ◽  
C. A. Nygård ◽  
R. Nordström ◽  
A. M. Gylle
Keyword(s):  
Electron Transport ◽  
Baltic Sea ◽  
Fucus Vesiculosus ◽  
The Baltic Sea ◽  
In Situ Study ◽  
Relative Electron ◽  
Different Depths ◽  
The Baltic ◽  
Marine Macroalga

Present and past depth distribution of bladderwrack (Fucus vesiculosus) in the Baltic Sea

2006 ◽  
Vol 84 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Kaire Torn ◽  
Dorte Krause-Jensen ◽  
Georg Martin
Keyword(s):  
Baltic Sea ◽  
Depth Distribution ◽  
Fucus Vesiculosus ◽  
The Baltic Sea ◽  
The Baltic

scholarly journals In-Situ Evaluation of the Protectivity of Coatings Applied to Metal Cultural Artefacts Using Non-Destructive Electrochemical Measurements

2021 ◽  
Vol 2 (1) ◽  
pp. 120-132
Author(s):  
Douglas J. Mills ◽  
Katarzyna Schaefer ◽  
Tomasz Wityk
Keyword(s):  
Baltic Sea ◽  
Electrochemical Noise ◽  
Organic Coating ◽  
Noise Measurement ◽  
The Baltic Sea ◽  
Coating Type ◽  
The Baltic ◽  
Non Destructive ◽  
Electrolytic Resistance

Electrochemical Noise Measurement (ENM) and DC electrolytic resistance measurement (ERM) can be used to assess the level of protectiveness provided by an organic coating (paint or varnish) to the underlying metal. These techniques also have applicability to the thinner, transparent type of coatings used to protect archaeological artefacts. Two studies are presented here demonstrating how ERM and ENM techniques can be applied in artefact preservation. The similarity of the techniques, both of which are a measure of resistance, means results can be considered to be analogous. The first study investigated the use of ERM to determine the protection levels provided by typical coatings in order to develop a database of coating type and application for objects, for specific environments. The second study used ENM to evaluate coatings which had been applied to historic artefacts recovered from shipwrecks in the Baltic Sea and displayed inside the museum or kept in the museum store area. The studies showed the usefulness of both techniques for determining the level of protection of a coating and how a better performing coating can be specified if a pre-existing coating on an artefact has been found to be unsuitable.

scholarly journals Geographic variation in fitness‐related traits of the bladderwrack Fucus vesiculosus along the Baltic Sea‐North Sea salinity gradient

2019 ◽  
Vol 9 (16) ◽  
pp. 9225-9238 ◽  
Author(s):  
Francisco R. Barboza ◽  
Jonne Kotta ◽  
Florian Weinberger ◽  
Veijo Jormalainen ◽  
Patrik Kraufvelin ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Geographic Variation ◽  
North Sea ◽  
Salinity Gradient ◽  
Fucus Vesiculosus ◽  
The Baltic Sea ◽  
The Baltic

scholarly journals Evaluation of Sentinel-3A OLCI Products Derived Using the Case-2 Regional CoastColour Processor over the Baltic Sea

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3609 ◽  
Author(s):  
Kyryliuk ◽  
Kratzer
Keyword(s):  
Remote Sensing ◽  
Baltic Sea ◽  
Attenuation Coefficient ◽  
Secchi Depth ◽  
Local Algorithm ◽  
The Baltic Sea ◽  
In Situ Data ◽  
The Baltic ◽  
Level 2

In this study, the Level-2 products of the Ocean and Land Colour Instrument (OLCI) data on Sentinel-3A are derived using the Case-2 Regional CoastColour (C2RCC) processor for the SentiNel Application Platform (SNAP) whilst adjusting the specific scatter of Total Suspended Matter (TSM) for the Baltic Sea in order to improve TSM retrieval. The remote sensing product “kd_z90max” (i.e., the depth of the water column from which 90% of the water-leaving irradiance are derived) from C2RCC-SNAP showed a good correlation with in situ Secchi depth (SD). Additionally, a regional in-water algorithm was applied to derive SD from the attenuation coefficient Kd(489) using a local algorithm. Furthermore, a regional in-water relationship between particle scatter and bench turbidity was applied to generate turbidity from the remote sensing product “iop_bpart” (i.e., the scattering coefficient of marine particles at 443 nm). The spectral shape of the remote sensing reflectance (Rrs) data extracted from match-up stations was evaluated against reflectance data measured in situ by a tethered Attenuation Coefficient Sensor (TACCS) radiometer. The L2 products were evaluated against in situ data from several dedicated validation campaigns (2016–2018) in the NW Baltic proper. All derived L2 in-water products were statistically compared to in situ data and the results were also compared to results for MERIS validation from the literature and the current S3 Level-2 Water (L2W) standard processor from EUMETSAT. The Chl-a product showed a substantial improvement (MNB 21%, RMSE 88%, APD 96%, n = 27) compared to concentrations derived from the Medium Resolution Imaging Spectrometer (MERIS), with a strong underestimation of higher values. TSM performed within an error comparable to MERIS data with a mean normalized bias (MNB) 25%, root-mean square error (RMSE) 73%, average absolute percentage difference (APD) 63% n = 23). Coloured Dissolved Organic Matter (CDOM) absorption retrieval has also improved substantially when using the product “iop_adg” (i.e., the sum of organic detritus and Gelbstoff absorption at 443 nm) as a proxy (MNB 8%, RMSE 56%, APD 54%, n = 18). The local SD (MNB 6%, RMSE 62%, APD 60%, n = 35) and turbidity (MNB 3%, RMSE 35%, APD 34%, n = 29) algorithms showed very good agreement with in situ data. We recommend the use of the SNAP C2RCC with regionally adjusted TSM-specific scatter for water product retrieval as well as the regional turbidity algorithm for Baltic Sea monitoring. Besides documenting the evaluation of the C2RCC processor, this paper may also act as a handbook on the validation of Ocean Colour data.

scholarly journals Gene regulatory response to hyposalinity in the brown seaweed Fucus vesiculosus

BMC Genomics ◽  
2020 ◽  
Vol 21 (1) ◽  
Author(s):  
Luca Rugiu ◽  
Marina Panova ◽  
Ricardo Tomás Pereyra ◽  
Veijo Jormalainen
Keyword(s):  
Gene Expression ◽  
Baltic Sea ◽  
Expression Patterns ◽  
Fucus Vesiculosus ◽  
Gene Expression Patterns ◽  
The Baltic Sea ◽  
Fixation Rate ◽  
Transcriptomic Response ◽  
The North ◽  
The Baltic

Abstract Background Rockweeds are among the most important foundation species of temperate rocky littoral shores. In the Baltic Sea, the rockweed Fucus vesiculosus is distributed along a decreasing salinity gradient from the North Atlantic entrance to the low-salinity regions in the north-eastern margins, thus, demonstrating a remarkable tolerance to hyposalinity. The underlying mechanisms for this tolerance are still poorly understood. Here, we exposed F. vesiculosus from two range-margin populations to the hyposaline (2.5 PSU - practical salinity unit) conditions that are projected to occur in the region by the end of this century as a result of climate change. We used transcriptome analysis (RNA-seq) to determine the gene expression patterns associated with hyposalinity acclimation, and examined the variation in these patterns between the sampled populations. Results Hyposalinity induced different responses in the two populations: in one, only 26 genes were differentially expressed between salinity treatments, while the other population demonstrated up- or downregulation in 3072 genes. In the latter population, the projected future hyposalinity induced an acute response in terms of antioxidant production. Genes associated with membrane composition and structure were also heavily involved, with the upregulation of fatty acid and actin production, and the downregulation of ion channels and alginate pathways. Changes in gene expression patterns clearly indicated an inhibition of the photosynthetic machinery, with a consequent downregulation of carbohydrate production. Simultaneously, energy consumption increased, as revealed by the upregulation of genes associated with respiration and ATP synthesis. Overall, the genes that demonstrated the largest increase in expression were ribosomal proteins involved in translation pathways. The fixation rate of SNP:s was higher within genes responding to hyposalinity than elsewhere in the transcriptome. Conclusions The high fixation rate in the genes coding for salinity acclimation mechanisms implies strong selection for them. The among-population differentiation that we observed in the transcriptomic response to hyposalinity stress suggests that populations of F. vesiculosus may differ in their tolerance to future desalination, possibly as a result of local adaptation to salinity conditions within the Baltic Sea. These results emphasise the importance of considering interspecific genetic variation when evaluating the consequences of environmental change.

scholarly journals Divergence within and among Seaweed Siblings (Fucus vesiculosus and F. radicans) in the Baltic Sea

PLoS ONE ◽  
2016 ◽  
Vol 11 (8) ◽  
pp. e0161266 ◽  
Author(s):  
Angelica Ardehed ◽  
Daniel Johansson ◽  
Lisa Sundqvist ◽  
Ellen Schagerström ◽  
Zuzanna Zagrodzka ◽  
...  
Keyword(s):  
Baltic Sea ◽  
Fucus Vesiculosus ◽  
The Baltic Sea ◽  
The Baltic

scholarly journals Nodularin induces oxidative stress in the Baltic Sea brown alga Fucus vesiculosus (Phaeophyceae)

2007 ◽  
Vol 64 (2) ◽  
pp. 149-159 ◽  
Author(s):  
Stephan Pflugmacher ◽  
Miikka Olin ◽  
Harri Kankaanpää
Keyword(s):  
Oxidative Stress ◽  
Baltic Sea ◽  
Brown Alga ◽  
Fucus Vesiculosus ◽  
The Baltic Sea ◽  
The Baltic

REPRODUCTIVE SUCCESS OF FUCUS VESICULOSUS (PHAEOPHYCEAE) IN THE BALTIC SEA

1999 ◽  
Vol 35 (2) ◽  
pp. 254-269 ◽  
Author(s):  
Ester A. Serrão ◽  
Susan H. Brawley ◽  
Jenny Hedman ◽  
Lena Kautsky ◽  
Göran Samuelsson
Keyword(s):  
Reproductive Success ◽  
Baltic Sea ◽  
Fucus Vesiculosus ◽  
The Baltic Sea ◽  
The Baltic
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