Trophodynamic control by clupeid predators on recruitment success in Baltic cod?   总被引：5，自引：3，他引：5  

Koster  Friedrich W.; Mollmann  Christian 《ICES Journal of Marine Science》2000,57(2):310-323

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Gradient responses of epilithic diatom communities in the Baltic Sea proper   总被引：1，自引：0，他引：1  

Anna Ulanova  Pauli Snoeijs   《Estuarine, Coastal and Shelf Science》2006,68(3-4):661

Diatom communities and assemblages are widely used as indicators of ecological change in aquatic environments and for reconstructing palaeo-environments. Good calibration data sets, directly linking changes in diatom composition to environmental factors, are needed for building reliable gradient models with high indicative value. Such models have a broad applicability because most diatom species have cosmopolitan distributions. This paper presents community analyses of brackish-water diatoms living on submerged stones in four areas of the Baltic Sea proper along the Swedish coast. The communities on the stones were composed of epilithic, epiphytic, epipelic, epipsammic and occasionally some pelagic species. Altogether, 158 quantitative samples were taken at 41 sites between 23 April and 11 May, 1990, and the data set contained 300 diatom taxa belonging to 75 genera. Species data were analysed with principal components analysis (PCA) and environmental factors were fitted passively by multiple regression analysis on the ordination results. Differences in community composition could be explained by variation in salinity (which was correlated with N:P and Si:P ratios and the occurrence of macroalgae on the stones), nutrient concentrations and variation in exposure to wave action (which was correlated to the occurrence of soft bottoms around the stones, water temperature and the occurrence of sand grains and macroalgae on the stones). Separate analyses for small taxa (cell biovolume <1000 μm³), for large taxa (cell biovolume ≥1000 μm³) and for small and large diatom taxa together showed that diatoms of different size classes respond differently to environmental variation.  相似文献   

Eastern Baltic cod (Gadus morhua callarias) stock dynamics: extending the analytical assessment back to the mid-1940s     

Eero  Margit; Koster  Friedrich W.; Plikshs  Maris; Thurow  Fritz 《ICES Journal of Marine Science》2007,64(6):1257-1271

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Spawning bed selection by the Baltic herring (Clupea harengus membras) in the Archipelago of SW Finland     

Kaaria  J.; Rajasilta  M.; Kurkilahti  M.; Soikkeli  M. 《ICES Journal of Marine Science》1997,54(5):917-923

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Infection of Baltic herring (Clupea harengus membras) with Anisakis simplex larvae, 1992-1999: a statistical analysis using generalized linear models     

Podolska  Magdalena; Horbowy  Jan 《ICES Journal of Marine Science》2003,60(1):85-93

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Age determination of Baltic herring from whole otoliths and from neutral red stained otolith cross sections   总被引：2，自引：1，他引：2  

Peltonen  Heikki; Raitaniemi  Jari; Parmanne  Raimo; Eklund  Jan; Nyberg  Kari; Halling  Folke 《ICES Journal of Marine Science》2002,59(2):323-332

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Relationship between the optical properties of chromophoric dissolved organic matter and total concentration of dissolved organic carbon in the southern Baltic Sea region   总被引：10，自引：0，他引：10  

Giovanni M. Ferrari  Mark D. Dowell  Stefania Grossi  Cristina Targa 《Marine Chemistry》1996,55(3-4)

Absorption and fluorescence of chromophoric dissolved organic matter (CDOM) and dissolved organic carbon (DOC) measurements were performed during three oceanographic surveys in 1994 in the southern Baltic Sea (Polish area of the Baltic Proper). DOC was measured both by high-temperature catalytic oxidation (HTCO) and low-temperature oxidation (LTO) conventional persulphate methods. CDOM fluorescence was shown to be highly correlated with absorption, with the same regression parameters, despite the seasonal change in different hydrographic conditions and the fluorescence quantum yield variations (1.23 ± 0.07 in April and 0.97 ± 0.12 in September). The results show a good correlation between the optical parameters and DOC although ˜ 70% of the DOC does not display significant absorption in the UV-visible range (350–750 nm). The non-absorbing DOC measured with HTCO method appears unaffected by seasonal changes. Consequently, total DOC can be predicted by optical methods using remote sensing techniques. The non-absorbing DOC measured by LTO method varies from 62% (April) to 76% (September), which implies that there is requirement for estimates on a seasonal basis.  相似文献   

Diel dynamics of acoustic measurements of Baltic fish     

Orlowski  A. 《ICES Journal of Marine Science》2000,57(4):1196-1203

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Diet composition and food selectivity of 0-group herring (Clupea harengus L.) and sprat (Sprattus sprattus (L.)) in the northern Baltic Sea     

Arrhenius  Fredrik 《ICES Journal of Marine Science》1996,53(4):701-712

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Anisotropy of wind and wave regimes in the Baltic proper   总被引：1，自引：0，他引：1  

Tarmo Soomere 《Journal of Sea Research》2003,49(4):305

The directional distribution of moderate and strong winds in the Baltic Sea region is shown to be strongly anisotropic. The dominating wind direction is south-west and a secondary peak corresponds to north winds. North-west storms are relatively infrequent and north-east storms are extremely rare. Angular distribution of extreme wind speed also has a two-peaked shape with maxima corresponding to south-west and north winds, and a deep minimum for easterly winds. The primary properties of the anisotropy such as prevailing winds, frequency of their occurrence, directional distribution of mean and maximum wind speeds coincide on both sides of the Baltic proper. The specific wind regime penetrates neither into the mainland nor into the Gulf of Finland or the Gulf of Riga.Properties of the saturated wave field in the neighbourhood of proposed sites of the Saaremaa (Ösel) deep harbour are analysed on the basis of the wave model WAM forced by steady winds. The directional distribution of wave heights in typical and extreme storms is highly anisotropic. Remarkable wave height anomalies may occur in the neighbourhood of the harbour sites.  相似文献