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  • Other Sources  (154)
  • Springer-Verlag  (78)
  • Inter Research  (76)
  • 2015-2019  (98)
  • 1995-1999  (56)
  • 1950-1954
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  • 1
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    Light Science: Physics and the Visual Arts (1999)
    Springer-Verlag
    In:  New York, 442 pp., Springer-Verlag, vol. 70, no. Publ. No. 12, pp. 1039-1054, (ISBN 0-415-30725-2, 0-415-30724-4 (400 pp.))
    Details
    Publication Date: 1999
    Keywords: Textbook of physics ; optics ; color ; ambigram ; Mozart ; holography ; history
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    BIBLIOGRAPHY SEISMOLOGY
  • 2
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    Predictions of deformation and gravity change caused by recent melting of the Vatnajökull ice cap, Iceland (1997)
    Springer-Verlag
    In:  Professional Paper, Open-File Rept., Gravity, Geoid and Marine Geodesy, Berlin, Springer-Verlag, vol. 22, no. 16, pp. 311-319, (ISBN 0080419208)
    Details
    Publication Date: 1997
    Keywords: Crustal deformation (cf. Earthquake precursor: deformation or strain) ; Modelling ; Gravimetry, Gravitation ; Inelastic ; FROTH ; siehe ; auch ; J. ; Luxemb. ; de ; Geodyn., ; 82nd ; sess., ; 17-19 ; March ; 1997
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    High levels of solar radiation offset impacts of ocean acidification on calcifying and non-calcifying strains of Emiliania huxleyi (2017)
    Inter Research
    In:  Marine Ecology Progress Series, 568 . pp. 47-58.
    Details
    Publication Date: 2020-02-06
    Description: Coccolithophores, a globally distributed group of marine phytoplankton, showed diverse responses to ocean acidification (OA) and to combinations of OA with other environmental factors. While their growth can be enhanced and calcification be hindered by OA under constant indoor light, fluctuation of solar radiation with ultraviolet irradiances might offset such effects. In this study, when a calcifying and a non-calcifying strain of Emiliania huxleyi were grown at 2 CO2 concentrations (low CO2 [LC]: 395 µatm; high CO2 [HC]: 1000 µatm) under different levels of incident solar radiation in the presence of ultraviolet radiation (UVR), HC and increased levels of solar radiation acted synergistically to enhance the growth in the calcifying strain but not in the non-calcifying strain. HC enhanced the particulate organic carbon (POC) and nitrogen (PON) productions in both strains, and this effect was more obvious at high levels of solar radiation. While HC decreased calcification at low solar radiation levels, it did not cause a significant effect at high levels of solar radiation, implying that a sufficient supply of light energy can offset the impact of OA on the calcifying strain. Our data suggest that increased light exposure, which is predicted to happen with shoaling of the upper mixing layer due to progressive warming, could counteract the impact of OA on coccolithophores distributed within this layer.
    Type: Article , PeerReviewed
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  • 4
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    Coelacanth population, conservation and fishery activity at Grande Comore, West Indian Ocean (1998)
    Inter Research
    In:  Marine Ecology Progress Series, 166 . pp. 231-236.
    Details
    Publication Date: 2017-07-06
    Description: The only known population of coelacanths, in the Comores, western Indian Ocean, is endangered by human predation. Historical catch data from Grande Comore reveal that annual catch rates increased steadily from 1954 until the 1970s. This trend was temporarily interrupted due to an international policy introducing motorized boats and promoting offshore fishing techniques. Coelacanths are only caught from traditional unmotorized outrigger canoes as an incidental by-catch of deep water line fishing. A complete survey of all motorized and unmotorized vessels in 1995 at Grande Comore in comparison to earlier years indicated that a recent decreased use of motors and increase of unmotorized canoe fishing has led to an increase in coelacanth catches. Conservation measures and strategies for reducing the fishing pressure exerted on coelacanths are discussed. The southwest coast of Grande Comore should be designated as a nature reserve and protected area where immediate protection measures should be taken, an opinion which is supported by Comorian authorities.
    Type: Article , PeerReviewed
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  • 5
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    Seagrass wasting disease varies with salinity and depth in natural Zostera marina populations (2018)
    Inter Research
    In:  Marine Ecology Progress Series, 587 . pp. 105-115.
    Details
    Publication Date: 2021-02-08
    Description: In the 1930s the wasting disease pathogen Labyrinthula zosterae is believed to have killed 90% of the temperate seagrass Zostera marina in the Atlantic Ocean. Despite the devastating impact of this disease the host–pathogen interaction is still poorly understood, and few field studies have investigated factors correlating with the prevalence and abundance of L. zosterae. This study measures wasting disease in natural populations of Z. marina, showing a strong correlation between the disease and both salinity and water depth. No infection was detected in Z. marina shoots from low salinity (13–25 PSU) meadows, whereas most shoots carried the disease in high salinity (25–29 PSU). Shallow (1 m) living Z. marina shoots were also more infected compared to shoots in deeper (5 m) meadows. In addition, infection and transplantation experiments showed that Z. marina shoots from low salinity meadows with low pathogen pressure were more susceptible to L. zosterae infection. The higher susceptibility could not be explained by lower content of inhibitory defense compounds in the shoots. Instead, extracts from all Z. marina shoots significantly reduced pathogen growth, suggesting that Z. marina contains inhibitory compounds that function as a constitutive defense. Overall, the results show that seagrass wasting disease is common in natural Z. marina populations in the study area and that it increases with salinity and decreases with depth. Our findings also suggest that low salinity areas can act as a refuge against seagrass wasting disease.
    Type: Article , PeerReviewed
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  • 6
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    Reef sponges facilitate the transfer of coral-derived organic matter to their associated fauna via the sponge loop (2018)
    Inter Research
    In:  Marine Ecology Progress Series, 589 . pp. 85-96.
    Details
    Publication Date: 2021-02-08
    Description: The high biodiversity of coral reefs results in complex trophic webs where energy and nutrients are transferred between species through a multitude of pathways. Here, we hypothesize that reef sponges convert the dissolved organic matter released by benthic primary producers (e.g. corals) into particulate detritus that is transferred to sponge-associated detritivores via the sponge loop pathway. To test this hypothesis, we conducted stable isotope (13C and15N) tracer experiments to investigate the uptake and transfer of coral-derived organic matter from the sponges Mycale fistulifera and Negombata magnifica to 2 types of detritivores commonly associated with sponges: ophiuroids (Ophiothrix savignyi and Ophiocoma scolopendrina) and polychaetes (Polydorella smurovi). Findings revealed that the organic matter naturally released by the corals was indeed readily assimilated by both sponges and rapidly released again as sponge detritus. This detritus was subsequently consumed by the detritivores, demonstrating transfer of coral-derived organic matter from sponges to their associated fauna and confirming all steps of the sponge loop. Thus, sponges provide a trophic link between corals and higher trophic levels, thereby acting as key players within reef food webs.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
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  • 7
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    Humboldt penguins monitored via VHF telemetry (1998)
    Inter Research
    In:  Marine Ecology Progress Series, 162 . pp. 279-286.
    Details
    Publication Date: 2018-05-08
    Description: VHF telemetry was used in November and December 1995 on 8 Humboldt penguins Spheniscus humboldti breeding at Pan de Azúcar Island (26°S, 70°W), Northern Chile, to determine at-sea behaviour of the birds. We obtained 2710 locations, 90% of which were within a radius of 20 km around the island. Mean travelling speed of the birds was 0.92 m s-1 and speed distribution showed peaks at 1.6 and 3 m s-1. Penguins travelling between foraging areas remained submerged for an average of 8.4 s between surfacings, whereas foraging dives lasted on average 61 s. The analysis of 79 complete foraging trips showed that tracks deviated from a straight course, and range (maximum distance from island) was only 0.37 times total horizontal distance swum. Birds did not forage synchronously or in the same foraging areas. However, foraging ranges were correlated between birds, indicating similar search strategies during periods of low food availability. The results obtained here via VHF telemetry agreed well with those of previous studies employing satellite transmitters and data loggers.
    Type: Article , PeerReviewed
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  • 8
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    Tissue composition of sponges from the Weddell Sea, Antarctica: not much meat on the bones (1995)
    Inter Research
    In:  Marine Ecology Progress Series, 123 . pp. 149-153.
    Details
    Publication Date: 2018-06-15
    Description: The tissue of 31 demosponge and 7 hexachnelhd species was analyzed for its composition of organic and lnorganic matter With one excephon (Hahclona cf gausaana) inorganic matter i e n~ostly the siliceous skeleton, accounted for most of the dry weight, varying between about 60 and 95%dry wt There were no general trends in the ratio of organic to inorganic matter within sponge orders or genera, and within one species, the ratio could vary between stations For one of the hexactinellids Bathydorus spmosus, several size classes were analyzed and there was no systematic change in the organic inorganic matter ratio w t h specimen size For some species the results from the Weddell Sea sponges are in good agreement with earlier data from McMurdo Sound The low organic matter content in Weddell Sea sponges mphes that sponge biomasses are much lower than hitherto assumed on the basis of then high abundances and large sizes In consequence Antarctic sponges despite their ubiquitousness, may only channel a m n o r fractlon of the general bentho-pelagic flow of matter and energy and their maln role in the ecosystem is likely structural rather than dynamic
    Type: Article , PeerReviewed
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  • 9
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    Impact of Aurelia aurita medusae (Cnidaria, Scyphozoa) on the standing stock and community composition of mesozooplankton in the Kiel Bight (western Baltic Sea) (1995)
    Inter Research
    In:  Marine Ecology Progress Series, 127 . pp. 39-45.
    Details
    Publication Date: 2018-06-15
    Description: During 5 consecutive summer seasons (1990 to 1994) both Aureliaaurita medusa and mesozooplankton abundances were investigated at 2 stations in the Kiel Bight (western Baltic Sea). Stocks of medusae varied considerably between the years, with median abundance of 1 and 0.3 ind. 100 m-3 in 1990 and 1991, 3 and 4 ind. 100 m-3 in 1992 and 1994, but 9 ind. 100 m-3 in 1993. Significant differences in the mesozooplankton stock and community composition were observed in 1993 when compared with the year of rather low Aurelia abundance (1991). Total zooplankton and copepod numbers both exhibited an inverse relationship with the abundance of medusae and were thus considerably lower in 1993 than in 1991. However, not all copepod species were affected by A. aurita. Pseudo- and Paracalanus spp. and Oithonasimilis showed dramatically reduced stocks in the bloom year when compared with the medusa-poor situation, but no significant changes were found for Centropageshamatus and Acartia spp. Also other zooplankton groups with the exception of bivalve larvae were reduced by the medusae. The differential response of zooplankton to varying abundance of medusae led to a shift in the trophic structure of the zooplankton community. Fine-filter feeders and raptorial feeders were much more important in years when medusae occurred in low densities, whereas coarse-filter feeders dominated in the opposite situation.
    Type: Article , PeerReviewed
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  • 10
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    Summer distribution of micro- and small mesozooplankton in the Red Sea and Gulf of Aden, with special reference to non-calanoid copepods (1995)
    Inter Research
    In:  Marine Ecology Progress Series, 118 . pp. 81-102.
    Details
    Publication Date: 2018-06-15
    Description: From the Gulf of Aden along a transect to the central-northern Red Sea the abundance and taxonomic composition of metazoan plankton was studied during the southwest monsoon period (summer 1987). Samples were taken with 0.055 mm mesh nets down to a maximum depth of 1050 m. In the epipelagic zone, a distinct decrease in total plankton abundance was observed from south to north, which was much more pronounced in biomass (by a factor of up to 10) as compared to numbers (by a factor of 2). This could partly be explained by differences in the taxonomic and/or size composition of the planktonic fauna. Among non-calanoid copepods, 40 out of 75 species or taxa investigated decreased in abundance from south to north. Sixteen of these species were completely absent in the central-northern area. Nineteen species or taxa, however, showed the opposite feature of a higher abundance in the central-northern Red Sea. The stations were grouped according to similarities in the taxonomic composition of non-calanoid copepods in the epipelagic zone. The following 3 geographical regions could be separated: (1) Gulf of Aden and Strait of Bab al Mandab; (2) southern Red Sea; and (3) central-northern Red Sea. In the meso- and bathypelagic zones, regional differences were not evident. The results are discussed in relation to hydrographic conditions during summer 1987.
    Type: Article , PeerReviewed
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