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You searched for: Subject Baltic Sea Remove constraint Subject: Baltic Sea Subject term Baltic Sea Remove constraint Subject term: Baltic Sea
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1. Character Displacement and Biogeography of the Pygmy Shrew in Northern Europe

Author:
Mats G. Malmquist
Source:
Ecology 1985 v.66 no.2 pp. 372-377
ISSN:
0012-9658
Subject:
Sorex; allopatry; interspecific competition; islands; jaws; sea level; shrews; skull; sympatry; zoogeography; Baltic Sea; Northern European region
Abstract:
... Two ecologically similar shrew species, Sorex minutus and S. araneus, were studied in sympatry on the Swedish mainland and in allopatry on Irelend, the Outer Hebrides, and two islands in the Baltic Sea, in order to examine competitive character displacement in skull morphology. Eight skull measures were compared on a total of 228 specimens. S. minutus had significantly smaller jaws in sympatry. It ...
DOI:
10.2307/1940386

2. Adult Interference with Postlarvae in Soft Sediments: The Pontoporeia‐Macoma Example

Author:
Ragner Elmgren; Sven Ankar; Birgitta Marteleur; Gunilia Ejdung
Source:
Ecology 1986 v.67 no.4 pp. 827-836
ISSN:
0012-9658
Subject:
Amphipoda; adults; aquariums; asphyxia; biomass; carrying capacity; death; larvae; mortality; postlarvae; sediments; starvation; Baltic Sea
Abstract:
... In the Baltic Sea, the presence of dense populations of the deposit—feeding amphipods Pontoporeia affinis and P. femorata has been hypothesized to inhibit recruitment of the bivalve Macoma balthica. Experimental tests with P. affinis and newly settled M. balthica in small, flow—through aquaria corroborated this hypothesis. Survival of small M. balthica spat decreased with increasing density of Pon ...
DOI:
10.2307/1939805

3. Adaptive variation in head size in Vipera berus L. populations

Author:
Source:
Biological journal of the Linnean Society 1991 v.43 no.4 pp. 281-296
ISSN:
0024-4066
Subject:
Microtus agrestis; Vipera; body size; coevolution; color; geographical variation; head; islands; morphs; phenotypic variation; predator-prey relationships; predators; prey species; Baltic Sea
Abstract:
... To prove that predators are morphologically adapted to the size of their prey one has to demonstrate that the morphological variation in the trophic apparatus is related to the prey size distribution and that the variation in the trait has some effect on individual fitness. I have studied geographic variation in relative head length (RHL) of adders, Vipera berus, on the Swedish mainland and on gro ...
DOI:
10.1111/j.1095-8312.1991.tb00600.x

4. Genetic divergence and a hybrid zone between Baltic and North Sea Mytilus populations (Mytilidae: Mollusca)

Author:
Source:
Biological journal of the Linnean Society 1991 v.43 no.2 pp. 127-148
ISSN:
0024-4066
Subject:
Mytilus edulis; Mytilus galloprovincialis; alleles; allozymes; divergent evolution; gene frequency; genetic distance; genetic variation; hybridization; hybrids; loci; mussels; Baltic Sea; North Sea
Abstract:
... Populations of the common mussel (Mytilus edulis) from the North Sea area (Skakerrak‐Kattegat) and those from the Baltic Sea are almost diagnostically differentiated at five out of 22 studied allozyme loci; at a further seven loci, alleles predominant or common in one area are nearly absent in the other. Genetic distance was estimated at 0.28; this is similar to the distances of these populations ...
DOI:
10.1111/j.1095-8312.1991.tb00589.x

5. Thin-layer silver ion chromatography and supercritical fluid chromatography of baltic herring (Clupea harengus membras) triacylglycerols

Author:
Kallio, H.; Vauhkonen, T.; Linko, R.R.
Source:
Journal of agricultural and food chemistry 1991 v.39 no.9 pp. 1573-1577
ISSN:
0021-8561
Subject:
long chain fatty acids; chemical analysis; triacylglycerols; food composition; herring; Baltic Sea
Abstract:
... The Baltic herring flesh triacylglycerols (TAGs) were separated in eight fractions by Ag+ thin-layer chromatography (TLC), and the four most unsaturated fractions were analyzed by capillary supercritical fluid chromatography according to their acyl carbon numbers (ACN). In the most unsaturated fraction the major ACNs were 58, 60, and 62, whereas in the three subsequent fractions ACN values of 52, ...
DOI:
10.1021/jf00009a007

6. Enantioselective determination of chlordane components using chiral high-resolution gas chromatography-mass spectrometry with application to environmental samples

Author:
Buser, H.R.; Muller, M.D.; Rappe, C.
Source:
Environmental science & technology 1992 v.26 no.8 pp. 1533-1540
ISSN:
1520-5851
Subject:
water pollution; Salmo salar; Pygoscelis; chlordane; chemical analysis; seawater; Halichoerus grypus; toxicity; herring; seals; animal tissues; Antarctica; Sweden; Baltic Sea
DOI:
10.1021/es00032a006

7. Spruce forests (Ass. Sphango girgensohnii - Piceetum (Br.-Bl. 39) Polak. 62) on excessively moistened peatlands in Latvia

Author:
Normunds Priedits
Source:
Acta Societatis Botanicorum Poloniae 1993 v.62 no.3-4 pp. 199-202
ISSN:
0001-6977
Subject:
Betula pendula; Betula pubescens; Picea abies; Pinus sylvestris; biodiversity; bromine; forest communities; forests; peatlands; phytosociology; swamps; trees; Baltic Sea; Latvia
Abstract:
... The research carried out on swamp spruce forests on peatland in Latvia gives a detailed notion of the phytosociological structure of Ass. Sphagno girgensohnii - Piceetum (Br. - BI. 39) Polak. 62 in the western part of the East-European Plain at the Baltic Sea. The paper reflects one of the aspects of swamp forest investigation results in Latvia on forest communities, its biodiversity and presevati ...
DOI:
10.5586/asbp.1993.031

8. Early-Holocene coastal environments and climate in southeast Sweden: a reconstruction based on macrofossils from submarine deposits

Author:
Marie-José Gaillard; Geoffrey Lemdahl
Source:
Holocene 1994 v.4 no.1 pp. 53-68
ISSN:
0959-6836
Subject:
Ancylus; climate; coasts; dunes; insects; lakes; molluscs; rivers; sandy soils; sea level; sediments; trees; vegetation; Baltic Sea; Sweden
Abstract:
... Submarine organic deposits situated 0-15 m below present sea level off the southeastern Swedish coast of the Baltic Sea (Hanö Bay, 55°43'N, 14°12'E) were studied for their macrofossil content (plant, insect and mollusc remains) and radiocarbon dated. These deposits are interpreted as gyttja sediments that accumulated in shallow, elongated lakes behind beach ridges or coastal sand dunes. Coastal pr ...
DOI:
10.1177/095968369400400107

9. Gillnet catches as an estimate of fish abundance: a comparison between vertical gillnet catches and hydroacoustic abundances of Baltic Sea herring (Clupea harengus) and sprat (Sptattus sptattus)

Author:
Sture Hansson; Lars G. Rudstam
Source:
Canadian journal of fisheries and aquatic sciences 1995 v.52 no.1 pp. 75-83
ISSN:
1205-7533
Subject:
Clupea harengus; acoustics; gillnets; herring; surveys; swimming; temperature; turbidity; variance; Baltic Sea
Abstract:
... We compared the catches in a series of six vertical gill nets (6.25- to 18.75-mm bar mesh) with estimates of fish abundance derived from hydroacoustics. A total of 47 combined acoustic and gillnet surveys were collected between July and November 1987–1992 in archipelago areas of the northern Baltic Sea. Fish abundance determined by hydroacoustics was significantly correlated with gillnet catches b ...
DOI:
10.1139/f95-007

10. The nitrogen load to the Baltic Sea--present situation, acceptable future load and suggested source reduction

Author:
Enell, M.; Fejes, J.
Source:
Water, air, and soil pollution 1995 v.85 no.2 pp. 877-882
ISSN:
0049-6979
Subject:
water pollution; nitrogen; runoff; agricultural land; air pollution; watersheds; pollution control; agriculture; forestry; emissions; Scandinavia; Russia; Baltic States; Germany; Poland; Baltic Sea
DOI:
10.1007/BF00476940

11. Time trends in levels, patterns, and profiles for polychlorinated dibenzo-p-dioxins, dibenzofurans, and biphenyls in a sediment core from the Baltic Proper

Author:
Kjeller, L.O.; Rappe, C.
Source:
Environmental science & technology 1995 v.29 no.2 pp. 346-355
ISSN:
1520-5851
Subject:
toxic substances; water pollution; polluted soils; combustion; dioxins; polychlorinated dibenzofurans; bleaching; sediments; pulp and paper mill effluents; Baltic Sea
DOI:
10.1021/es00002a010
PubMed:
22201380

12. Altered Benthic Prey‐Availability Due to Episodic Oxygen Deficiency Caused by Drifting Algal Mats

Author:
Alf Norkko; Erik Bonsdorff
Source:
Marine ecology 1996 v.17 no.1-3 pp. 355-372
ISSN:
0173-9565
Subject:
Bivalvia; Crangon; adults; algae; anaerobic conditions; benthic organisms; fauna; flounder; hypoxia; predation; predator-prey relationships; predators; sediments; surveys; temperature; Baltic Sea
Abstract:
... Large quantities of drifting algal mats have become a common phenomenon on shallow sandy bottoms in the northern Baltic Sea. A decomposing algal mat rapidly induces hypoxic or anoxic conditions in the underlying sediment and interferes with the normal living‐mode of the benthos, i.e., mobility, feeding, and predator‐prey relationships. Field surveys have shown that bivalves, such as Macoma balthic ...
DOI:
10.1111/j.1439-0485.1996.tb00514.x

13. Lyme borreliosis spirochetes in Ixodes ricinus (Acari: Ixodidae) and the varying hare on isolated islands in the Baltic Sea

Author:
Jaenson, T.G.T.; Talleklint, L.
Source:
Journal of medical entomology 1996 v.33 no.3 pp. 339-343
ISSN:
0022-2585
Subject:
Ixodes ricinus; Borrelia burgdorferi; Lepus timidus; disease reservoirs; tick infestations; Lyme disease; disease vectors; infection; Sweden; Baltic Sea
Abstract:
... We investigated isolated ecosystems to determine if Lyme borreliosis is maintained in the absence of reservoir-competent small mammals. Human eases of Lyme disease have been reported on the isolated islands of Gotska Sandon and Stora Karlso in the Baltic Sea. The varying hare, Lepus timidus, is the only terrestrial vertebrate species capable of serving as a host for all stages of Ixodes ricinus (L ...
DOI:
10.1093/jmedent/33.3.339
PubMed:
8667378

14. Meiobenthic Organisms as Indicators of Mixing Processes in the Baltic Surface Sediments

Author:
Janusz Pempkowiak; Joanna Kozuch; Maria Szymelfenig
Source:
Marine ecology 1996 v.17 no.1-3 pp. 175-179
ISSN:
0173-9565
Subject:
cesium; fauna; lead; mixing; radionuclides; sediments; Baltic Sea
Abstract:
... Two sediment cores were collected in the southern Baltic Sea and sliced into 1.0cm‐thick layers. Sediments of each layer were analysed for activities of ²¹⁰Pb, ¹³⁷Cs, ¹³⁴Cs and for the density of meiobenthic organisms (meiofauna). Zones with the rapid mixing occur in the uppermost layers (0–3 cm) of the cores based on ᴵ³⁴Cs profiles. The extent and density of meiofauna confirmed the rapid mixing a ...
DOI:
10.1111/j.1439-0485.1996.tb00498.x

15. Successful external fertilization in turbulent environments

Author:
Serrao, E.A.; Pearson, G.; Kautsky, L.; Brawley, S.H.
Source:
Proceedings of the National Academy of Sciences of the United States of America 1996 v.93 no.11 pp. 5286-5290
ISSN:
0027-8424
Subject:
ova; mixing; marine environment; Fucus distichus; hydrodynamics; fertilization (reproduction); seawater; diuron; spermatozoa; Fucus vesiculosus; Baltic Sea
Abstract:
... Mathematical and experimental simulations predict that external fertilization is unsuccessful in habitats characterized by high water motion. A key assumption of such predictions is that gametes are released in hydrodynamic regimes that quickly dilute gametes. We used fucoid seaweeds to examine whether marine organisms in intertidal and subtidal habitats might achieve high levels of fertilization ...
DOI:
10.1073/pnas.93.11.5286
PubMed:
11607682
PubMed Central:
PMC39237

16. The pattern of organochlorines in mussels Mytilus edulis L. from the south west Baltic Sea

Author:
Lee, K.M.; Kruse, H.; Wassermann, O.
Source:
Archives of environmental contamination and toxicology 1996 v.31 no.1 pp. 68-76
ISSN:
0090-4341
Subject:
water pollution; water quality; DDT (pesticide); indicator species; polychlorinated biphenyls; Mytilus edulis; Baltic Sea
DOI:
10.1007/BF00203909
PubMed:
8687992

17. Evidence for a more recent occurrence of water chestnut (Trapa natans L.) in Finland and its palaeoenvironmental implications

Author:
A.A. Korhola; M.J. Tikkanen
Source:
Holocene 1997 v.7 no.1 pp. 39-44
ISSN:
0959-6836
Subject:
Bacillariophyceae; Trapa natans; basins; eutrophication; fossils; fruits; habitats; lakes; paleoecology; pollen; radiocarbon dating; sediments; temperature; watersheds; Baltic Sea; Finland
Abstract:
... Pollen and diatom analyses as well as radiocarbon datings were used to study the development of the ancient lake-basin Pyysuo in SW Finland with mass occurrence of Trapa natans subfossil fruits in its sediments. The basin was isolated from the Baltic Sea c. 4300 BP, after which it continued to develop as a shallow, eutrophic, alkaline and vegetation-rich small lake until the final overgrowth by a ...
DOI:
10.1177/095968369700700104

18. Numerical integration of phytoplankton photosynthesis through time and depth in a water column

Author:
Walsby, A.E.
Source:
New phytologist 1997 v.136 no.2 pp. 189-209
ISSN:
0028-646X
Subject:
phytoplankton; mathematical models; chlorophyll; Aphanizomenon; spatial distribution; population distribution; light intensity; depth; photoinhibition; water temperature; reflectance; Baltic Sea
DOI:
10.1046/j.1469-8137.1997.00736.x

19. Patterns of macroalgal distribution in the Kattegat-Baltic region

Author:
Anne Lise Middelboe; Kaj Sand-Jensen; Klaus Brodersen
Source:
Phycologia 1997 v.36 no.3 pp. 208-219
ISSN:
2330-2968
Subject:
flora; geographical distribution; macroalgae; salinity; species diversity; Baltic Sea
Abstract:
... The decline of species diversity of benthic macroalgae in estuaries has been explained mainly by the physiological restrictions imposed by reduced salinity, although a complex of factors is likely to influence the distribution. A comprehensive distributional index for the 422 species of benthic marine macroalgae in 22 districts of the Kattegat-Baltic brackish region provided an opportunity to anal ...
DOI:
10.2216/i0031-8884-36-3-208.1

20. Periodic and episodic benthos recruitment in southwest Mecklenburg Bay (western Baltic Sea)

Author:
J. Prena; F. Gosselck; V. Schroeren; J. Voss
Source:
Helgoländer Meeresuntersuchungen 1997 v.51 no.1 pp. 1-21
ISSN:
0174-3597
Subject:
Polychaeta; adults; benthic organisms; hypoxia; nitrogen; oxygen; rivers; runoff; summer; surveys; wind; winter; Baltic Sea
Abstract:
... Temporal changes in the zoobenthos of southwest Mecklenburg Bay were studied using routine survey data collected in 1980–94. Earlier studies suggested that long-term oxygen deficiency on the scale of several months affects the zones below 20 m depth. Episodic benthic recolonization occurred during periods with improved oxygen conditions, as a rule by opportunistic polychaetes followed by some acti ...
DOI:
10.1007/BF02908750