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Registros recuperados: 17
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A three-dimensional view on biodiversity changes: spatial, temporal, and functional perspectives on fish communities in the Baltic Sea ArchiMer
Frelat, Romain; Orio, Alessandro; Casini, Michele; Lehmann, Andreas; Merigot, Bastien; Otto, Saskia A.; Sguotti, Camilla; Moellmann, Christian.
Fisheries and marine ecosystem-based management requires a holistic understanding of the dynamics of fish communities and their responses to changes in environmental conditions. Environmental conditions can simultaneously shape the spatial distribution and the temporal dynamics of a population, which together can trigger changes in the functional structure of communities. Here, we developed a comprehensive framework based on complementary multivariate statistical methodologies to simultaneously investigate the effects of environmental conditions on the spatial, temporal and functional dynamics of species assemblages. The framework is tested using survey data collected during more than 4000 fisheries hauls over the Baltic Sea between 2001 and 2016. The...
Tipo: Text Palavras-chave: Baltic Sea; Demersal fish community; Functional traits; Multivariate analysis; Spatio-temporal dynamics; Species distribution.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00475/58659/62410.pdf
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Assessing the Potential Benefits of the Geostationary Vantage Point for Generating Daily Chlorophyll-a Maps in the Baltic Sea ArchiMer
Bellacicco, Marco; Ciani, Daniele; Doxaran, David; Vellucci, Vincenzo; Antoine, David; Wang, Menghua; D'Ortenzio, Fabrizio; Marullo, Salvatore.
Currently, observations from low-Earth orbit (LEO) ocean color sensors represent one of the most used tools to study surface optical and biogeochemical properties of the ocean. LEO observations are available at daily temporal resolution, and are often combined into weekly, monthly, seasonal, and annual averages in order to obtain sufficient spatial coverage. Indeed, daily satellite maps of the main oceanic variables (e.g., surface phytoplankton chlorophyll-a) generally have many data gaps, mainly due to clouds, which can be filled using either Optimal Interpolation or the Empirical Orthogonal Functions approach. Such interpolations, however, may introduce large uncertainties in the final product. Here, our goal is to quantify the potential benefits of...
Tipo: Text Palavras-chave: Remote sensing; Ocean color products; Geostationary sensor; Baltic Sea.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00585/69693/67578.pdf
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Assessment of contaminant concentrations in sediments, fish and mussels sampled from the North Atlantic and European regional seas within the ICON project ArchiMer
Robinson, Craig D.; Webster, Lynda; Martinez-gomez, Concepcion; Burgeot, Thierry; Gubbins, Matthew J.; Thain, John E.; Vethaak, A. Dick; Mcintosh, Alistair D.; Hylland, Ketil.
Understanding the status of contaminants in the marine environment is a requirement of European Union Directives and the Regional Seas Conventions, so that measures to reduce pollution can be identified and their efficacy assessed. The international ICON workshop (Hylland et al., in this issue) was developed in order to test an integrated approach to assessing both contaminant concentrations and their effects. This paper describes and assesses the concentrations of trace metals, polycyclic aromatic hydrocarbons, and polychlorinated biphenyls in sediments, mussels, and fish collected from estuarine, coastal and offshore waters from Iceland to the Mediterranean Sea. For organic contaminants, concentrations progressively increased from Iceland, to the...
Tipo: Text Palavras-chave: Integrated assessment; ICES; North Atlantic; North Sea; Baltic Sea; Mediterranean Sea; Polycyclic aromatic hydrocarbons (PAHs); Polychlorinated biphenyls (PCBs); Trace metals; Environmental monitoring.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00324/43520/43051.pdf
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Coping with persistent environmental problems: systemic delays in reducing eutrophication of the Baltic Sea Ecology and Society
Varjopuro, Riku; Environmental Policy Centre, Finnish Environment Institute, Helsinki, Finland; riku.varjopuro@ymparisto.fi; Andrulewicz, Eugeniusz; National Marine Fisheries Research Institute, Gdynia, Poland; eandrulewicz@mir.gdynia.pl; Blenckner, Thorsten; Stockholm Resilience Centre, Stockholm University, Sweden; thorsten.blenckner@stockholmresilience.su.se; Dolch, Tobias; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Wadden Sea Station Sylt, Germany; Tobias.Dolch@awi.de; Heiskanen, Anna-Stiina; Marine Research Centre, Finnish Environment Institute, Helsinki, Finland; anna-stiina.heiskanen@ymparisto.fi; Steiner Brandt, Urs; Department of Environmental and Business Economics, University of Southern Denmark, Denmark; usb@sam.sdu.dk; Valman, Matilda; Stockholm Resilience Centre, Stockholm University, Sweden; Baltic Nest Institute, Baltic Sea Centre, Stockholm University, Sweden; Department of Political Science, Stockholm University, Sweden ; matilda.valman@stockholmresilience.su.se; Gee, Kira; Helmholtz-Zentrum Geesthacht, Germany; Department of Geography and Planning, University of Liverpool, UK ; k.gee@gmx.de; Potts, Tavis; Scottish Association of Marine Science, UK; Department of Geography and Environment, University of Aberdeen, UK; Tavis.Potts@sams.ac.uk; Psuty, Iwona; National Marine Fisheries Research Institute, Gdynia, Poland; iwcia@mir.gdynia.pl.
In this paper we focus on systemic delays in the Baltic Sea that cause the problem of eutrophication to persist. These problems are demonstrated in our study by addressing three types of delays: (1) decision delay: the time it takes for an idea or perceived need to be launched as a policy; (2) implementation delay: the time from the launch of a policy to the actual implementation; (3) ecosystem delay: the time difference between the implementation and an actual measurable effects. A policy process is one characterized by delays. It may take years from problem identification to a decision to taking action and several years further for actual implementation. Ecosystem responses to measures illustrate that feedback can keep the ecosystem in a certain state...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive management; Baltic Sea; Ecosystem delays; Monitoring of implementation.
Ano: 2014
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Cyst-Theca Relationship and Phylogenetic Position of Impagidinium caspienense Incubated from Caspian Sea Surface Sediments: Relation to Gonyaulax baltica and Evidence for Heterospory within Gonyaulacoid Dinoflagellates ArchiMer
Mertens, Kenneth; Takano, Yoshihito; Gu, Haifeng; Bagheri, Siamak; Pospelova, Vera; Pienkowski, Anna J.; Leroy, Suzanne A. G.; Matsuoka, Kazumi.
We investigate the cyst-theca relationship of Impagidinium caspienense. Through an incubation experiment, we succeeded in examining the motile stage. Additional molecular analysis of single-cyst PCR (LSU and SSU rDNA) reveal that the cyst is related to the species Gonyaulax baltica Ellegaard et al. (2002). The ability of this species to belong to two types of cyst-based genera (spiniferate and impagidinioid) suggests that environmental (particularly salinity) and not genetic factors explain the formation of both morphotypes by Gonyaulax baltica, which provides evidence for heterospory in this species. The affiliation to Gonyaulax baltica demonstrates that Impagidinium caspienense is not endemic to the Caspian Sea. The phylogenetic position of several other...
Tipo: Text Palavras-chave: Ataxiodinium choane; Baltic Sea; Impagidinium pallidum; Pyxidinopsis psilata; Salinity; Spiniferites belerius; Spiniferites ramosus.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00382/49326/49703.pdf
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Growth, delayed fluorescence and pigment composition of four Prorocentrum minimum strains growing at two salinities Biol. Res.
BERDEN-ZRIMEC,MAJA; FLANDER-PUTRLE,VESNA; DRINOVEC,LUKA; ZRIMEC,ALEXIS; MONTI,MARINA.
Prorocentrum minimum is a potentially harmful and widely distributed marine dinoflagellate. Several P. minimum strains have already been studied, showing phylogenetical relations of strains isolated from the same geographical regions. Similarity among the strains was further examined on the basis of their physiology. Pigment composition and concentration, as well as delayed fluorescence (DF) decay kinetics and intensity, were measured in four P. minimum strains isolated from the Baltic and Adriatic Seas. The strains were grown at two salinities characteristic of the Baltic (8 PSU) and North Adriatic Seas (32 PSU). Strain differences in DF decay kinetics and growth did not always follow their genetic relations. While two strains showed similarities to the...
Tipo: Journal article Palavras-chave: Adriatic Sea; Baltic Sea; Delayed fluorescence; HPLC; Prorocentrum minimum; Strains.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000100003
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Histology, cytogenetics and cytofluorymetry in diagnosis of neoplasia in Macoma balthica (Bivalvia, L.) from the southern Baltic Sea ArchiMer
Katarzyna, S; Renault, Tristan; Wolowicz, M.
This study presents results of histopathologic, cytogenetics and flow cytometry analyses performed on Macoma balthica collected from the Gulf of Gdansk (Baltic Sea) in 2003 in order to compare the techniques for diagnosis of neoplasia. The proportion of affected clams gave a crude prevalence of 15.7 %. The four stages of the disease defined by histology and three stages of neoplasia defined by flow cytometry were reported. Stage I defined by flow cytometry corresponded to stages I and II defined by histology. Chromosome analysis did not lead to a staging of neoplastic progression. Both cytogenetics and flow cytometry indicated a difference in the DNA content of non-neoplastic and neoplastic cells. Cytogenetics examination marked that the range of...
Tipo: Text Palavras-chave: Baltic Sea; Cytofluorymetry; Cytogenetics; Histology; Macoma balthica; Neoplasia.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-2921.pdf
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Long-term changes and coastal eutrophication. Examples from the Aland Islands and the Archipelago Sea, northern Baltic Sea ArchiMer
Bonsdorff, E; Blomqvist, Em; Mattila, J; Norkko, A.
The coastal and archipelago waters of the northern Baltic Sea are influenced by increasing eutrophication (significantly increasing temporal trends in nutrient availability). Increased nutrient levels and pelagic primary production have led to decreased transparency in the water body, increased plankton biomass, and increased amounts of filamentous algae. Large-scale and long-term (15-30 years) comparisons have shown that zoobenthic communities have changed significantly (altered species diversity, increased total abundance and increased biomass). The stress in the ecosystem is also illustrated at the population level (Macoma balthica). An increasing trend is shown for a near-shore fish community, where the increase in biomass has been linear over the past...
Tipo: Text Palavras-chave: Baltic Sea; Eutrophication; Long-term changes; Nutrient; Zoobenthos.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00093/20402/18069.pdf
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Neoplasia detection in Macoma balthica from the Gulf of Gdansk: comparison of flow cytometry, histology and chromosome analysis ArchiMer
Smolarz, Kasia; Renault, Tristan; Soletchnik, Patrick; Wolowicz, Macciek.
A flow cytometry protocol was applied for the detection of neoplasia in Macoma balthica L. from the Gulf of Gdansk (Baltic Sea, Poland). A simple method, based on an osmotic shock, was used to permeabilise gill cells. The cytometric pattern of normal clams consisted of 2 peaks, a major peak B and a smaller peak C. The cytometric pattern of affected clams consisted of 2 peaks named B' and C'. Two parameters were used to define the stages of abnormalities in M. balthica clams based on the percentage of cells in peaks B, C, B' and C' and on the ratio between the fluorescence value of peaks B, C, B' and C' in all individuals. Three stages of neoplasia were clearly distinguished by flow cytometry considering peak C'. Stage 1 was characterised by a major...
Tipo: Text Palavras-chave: Baltic Sea; Macoma balthica; Neoplasia; Cytogenetics; Histology; Flow cytometry.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-2918.pdf
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Nitrogen as the nutrient limiting the algal growth potential, for summer natural assemblages in the Gulf of Riga, eastern Baltic Sea ArchiMer
Maestrini, Serge; Balode, Maija; Bechemin, Christian; Purina, Ingrida; Botva, Uldis.
Nutrients potentially limiting the maximal biomass of natural assemblages were studied on the basis of samples collected in late July 1997, along a transect from the mouth of the river Daugava to the central part of the Gulf of Riga. The inorganic nutrient concentrations decreased strongly between the river mouth and the central part of the gulf from 17.3 to <1 mu M NO sub(3) super(-)+NO sub(2) super(-)+NH sub(4) super(+) (DIN), and from 3.5 to 0.03 mu M PO sub(4) super(3-). DIN : PO sub(4) super(3-) increased from 5 to 20. Similar trends occurred for SiO sub(3) super(2-) whose concentration decreased from 72 to 1.6 mu M, but DIN : SiO sub(3) super(2-) only halved. Comparison of DIN : P-PO sub(4) super(3-) ratios (atom : atom) with the Redfield's value...
Tipo: Text Palavras-chave: Limiting nutrient; Algal growth potential; Natural assemblages; Gulf of Riga; Baltic Sea.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00173/28439/26771.pdf
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Nitrogenous organic substances as potential nitrogen sources, for summer phytoplankton in the Gulf of Riga, eastern Baltic Sea ArchiMer
Maestrini, Serge; Balode, Maija; Bechemin, Christian; Purina, Ingrida.
To investigate whether uptake of dissolved organic compounds might favour the growth potential of toxic cyanobacteria and dinoflagellates, surface water was collected in late July 1997 in the Gulf of Riga, and enriched with different nitrogen sources. (1) Organic substances were added (25 mu M N) under P-, Si- and Fe-replete conditions. Urea sustained a biomass increase (protein content) 20% greater than that with NH sub(4) super(+). Glycine, hypoxanthine and putrescine gave only 50% of the biomass obtained with NH sub(4) super(+). Glutamic acid and spermine supported growth in only one case each, and guanine in none. (2) The >1000 dalton fraction of dissolved organic matter (DOM) taken from the Daugava River was provided at concentrations of 5, 15 and...
Tipo: Text Palavras-chave: Phytoplankton; Terrigenous DON; Nitrogenous nutrients; Baltic Sea.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00173/28437/26769.pdf
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Physiological responses of Macoma balthica to copper pollution in the Baltic ArchiMer
Sokolowski, A; Wolowicz, M; Hummel, H; Bogaards, R.
Physiological and behavioral responses to Cu exposure were measured in the Baltic clam Macoma balthica from the Gulf of Gdansk, southern Baltic Sea. The burrowing activity, mortality rate, glycogen content, condition index and free amino acid (FAA) composition were analysed as indicators of stress in a series of field and laboratory studies. M. balthica exposed to Cu showed clear Cu-concentration related differences in burrowing activity and mortality rate, but no consistent differences in the condition index, glycogen content, and free amino acids. The clams from a less polluted area reacted more strongly and were more sensitive to additional stress as compared to organisms from a more polluted region. The effect of Cu on the ecophysiology of Baltic clams...
Tipo: Text Palavras-chave: Stress; Cuivre; Écophysiologie; Macoma balthica; Mer Baltique; Stress; Copper; Ecophysiology; Macoma balthica; Baltic Sea.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43606/43925.pdf
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Plankton community composition in relation to availability and uptake of oxidized and reduced nitrogen ArchiMer
Berg, Gm; Balode, M; Purina, I; Bekere, S; Bechemin, Christian; Maestrini, Serge.
Trends in nitrogen utilization, determined with N-15-labeled substrates, were related to blooms of distinct phytoplankton groups in the Gulf of Riga, Baltic Sea, during May, June and July 1999. The dominant phytoplankton groups included diatoms, cryptophytes, dinoflagellates, and filamentous cyanobacteria. As the water column became progressively more stratified over the growing season, diatoms comprised a smaller proportion of the total phytoplankton assemblage and almost disappeared by late summer. Their disappearance correlated with undetectable surface-water nitrate concentrations and low nitrate uptake rates (5 to 8% of total nitrogen uptake). Diatoms were the only phytoplankton group significantly associated with the uptake of oxidized nitrogen...
Tipo: Text Palavras-chave: Nitrogen uptake; DON; Nitrate; Diatoms; Cyanobacteria; Cryptophytes; Baltic Sea; Gulf of Riga.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00000/10207/7595.pdf
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Reconstructing salinity changes and environmental influence on dinoflagellate cysts in the central Baltic Sea since the late 19th century ArchiMer
Sildever, Sirje; Ribeiro, Sofia; Mertens, Kenneth; Andersen, Thorbjørn Joest; Moros, Matthias; Kuijpers, Antoon.
We present a record of dinoflagellate cyst assemblage composition, abundance, and morphology from the central Baltic Sea, spanning from the late 19th to the early 21st century. Environmental time-series were analyzed in relation to changes in community structure and diversity as inferred from the sediment record, and average summer sea surface salinity (SSS) was reconstructed based on the average process length of Protoceratium reticulatum resting cysts. The reconstructed summer SSS was compared to instrumental data for a critical evaluation of this approach. The most abundant species in this record were P. reticulatum and Biecheleria baltica, and on average ten taxa were identified per sample. The cyst record of B. baltica indicated that although this...
Tipo: Text Palavras-chave: Baltic Sea; Biecheleria baltica; Dinoflagellate cysts; Environmental change; Protoceratium reticulatum; Sea-surface salinity; Sediment core records.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00481/59300/61994.pdf
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Sea Level and Climate ArchiMer
Harff, Jan; Flemming, Nicholas C; Groh, Andreas; Hunicke, Birgit; Lericolais, Gilles; Meschede, Martin; Rosentau, Alar; Sakellariou, Dimitris; Uscinowicz, Szymon; Zhang, Wenyan; Zorita, Eduardo.
This chapter gives an overview of the environmental changes to the European shelf and its marginal seas during the Late Pleistocene to the Middle Holocene. It first explains the regional tectonics of Europe. The age of the consolidation of the basement together with the plate tectonic setting serves as the main parameters determining coastal formation. Next, the chapter reviews the fluctuation of glacial and interglacial stadia as an effect of orbital parameters of the Earth around the Sun. In addition, it examines eustatic change during the Last Glacial Cycle (LGC). The chapter also describes the development of the Baltic Sea, the North Sea and the Atlantic shelf, based on numerical sea-level scenarios constrained by observational data. Finally, it...
Tipo: Text Palavras-chave: Baltic Sea; Climate change; Coastal formation; Environmental changes; European continental shelf; Eustatic change; Late Pleistocene; Middle Holocene; Sea level.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00391/50263/51051.pdf
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The baltic environmental information dissemination system: using environmental informatics as a tool for sustainable development in the Baltic Sea region Scientia Agricola
Leal Filho,Walter.
The on-going economic development of EU-countries as well of the countries in the C&E European region has been leading to a significant use of a great deal of natural resources as well as to noticeable environmental problems. The lack of a wide-spread environmental awareness from the side of those acting in various sectors (industry, public administration, users) sometimes inhibit the implementation of legislation already available as well as the introduction of new technologies deriving, from example, from marine research. An example of this state of affairs is seen in respect of the implementation of the recommendations deriving from Baltic 21 and VASAB 2010, which illustrate the advantages from a cross-sectorial, open mechanism for the dissemination...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Europe; Baltic Sea; Environment; Communication; Internet.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000300029
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Wind-induced variability in coastal larval retention areas: a case study on Western Baltic spring-spawning herring ArchiMer
Bauer, Robert Klaus; Stepputtis, Daniel; Graewe, Ulf; Zimmermann, Christopher; Hammer, Cornelius.
The investigation of larval dispersal and retention, their variability and dependence on wind conditions, has become a major topic in fisheries research owing to potential effects on stock recruitment and stock structuring. The present study quantifies the wind-induced variability of larval retention of herring in a highly productive coastal lagoon of the Western Baltic Sea. This lagoon, the Greifswalder Bodden, represents the main spawning area of Western Baltic Spring-Spawning Herring, a stock that has recently undergone a continuous decline in recruitment. The study tests whether this decline was related to changes in larval retention, more precisely to changes in wind conditions, the main forcing of the lagoon's circulation. To answer this, a model...
Tipo: Text Palavras-chave: Atmospheric forcing; Baltic Sea; Biophysical modelling; Greifswalder Bodden; Herring; Larval retention; Recruitment; Spring spawners.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00151/26224/24408.pdf
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