GLORIA — GEOMAR Library Ocean Research Information Access

1

Digitale Medien

Advances in the life sciences (1978)

Creed, E. R.

[s.l.] : Nature Publishing Group

Nature 272 (1978), S. 98-98

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] AMONG the many books published in the past year on the life sciences, three merit attention in thesecolumns: one for the layman and undergraduate, one for use as a course textbook, and the other an advanced text on evolution. The Life Science: Current Ideas of Biology (Harper and Row: New York, ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/272098a0

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2

Digitale Medien

Effect of temperature and food availability on reproductive responses of Streblospio benedicti (Polychaeta: Spionidae) with planktotrophic or lecithotrophic development (1986)

Levin, L. A. ; Creed, E. L.

Springer

Marine biology 92 (1986), S. 103-113

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ISSN: 1432-1793

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract Streblospio benedicti (Webster) from Tar Landing North Carolina (NC), USA with either planktotrophic or lecithotrophic development were reared under two food levels and three temperature regimes (two mimicking seasonal cycles in NC and one at constant 20°C). During the eight-month experiment no females switched reproductive mode and no significant differences in survivorship or reproductive activity were observed between reproductive types. However, reproductive activity and fecundity-related parameters were subject to influence by food and temperature. Survivorship, body size, and larval production was greater in winter-spring than summer-fall regimes. Higher food levels produced increased survivorship, reproductive activity and egg production in adults with lecithotrophic development but no change in those with planktotrophic development. Body size, egg size, egg number, numbers of larvae per brood pouch, and brood size were strongly correlated in female S. benedicti and most correlation coefficients were similar (or identical) in individuals having planktotrophic and lecithotrophic development. A comparison of egg size and brood size in females from Tar Landing suggests that individuals with the two forms of development package offspring differently but expend approximately equivalent reproductive effort. Larval trophic mode is best viewed as a genetic polymorphism in S. benedicti. Individuals with planktotrophic and lecithotrophic development exhibit similar reproductive responses to environmental variation and there is no evidence for speciation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00392752

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3

Digitale Medien

Biological Method of Estimating Smoke and Sulphur Dioxide Pollution (1973)

CREED, E. R. ; LEES, D. R. ; DUCKETT, J. G.

[s.l.] : Nature Publishing Group

Nature 244 (1973), S. 278-280

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Atmospheric pollution has a deleterious effect on much living matter and this may be cumulative2. A study of living matter may therefore give an indication of the pollution levels to which an area has been subjected in the recent past. Although effects are seen in animals as well as in plants, the ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/244278a0

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4

Digitale Medien

Two spot ladybirds as indicators of intense local air pollution (1974)

CREED, E. R.

[s.l.] : Nature Publishing Group

Nature 249 (1974), S. 390-392

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Samples previously reported from South Wales3 indicate a consistently low melanic frequency, the maximum being 6% in a sample of 35 individuals from Pontypridd. This is in accord with the occurrence of generally low levels of smoke pollution, in spite of considerable industrialisation7. Fig. la ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/249390a0

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5

Digitale Medien

Models of selection (1978)

Creed, E. R.

[s.l.] : Nature Publishing Group

Nature 272 (1978), S. 289-289

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] Organismic Evolution was designed and written, we are told, as an advanced text. It proceeds in fairly conventional fashion from simple concepts of population genetics through aspects of natural selection and speciation to a consideration of macroevolution. The main part of the text concludes with ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/272289a0

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6

Unbekannt

Ocean processes at the Antarctic continental slope (2014)

Heywood, K. J. ; Schmidtko, Sunke ; Heuze, C. ; [weitere]

Royal Society of London

In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 372 (2019). p. 20130047.

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Publikationsdatum: 2020-06-12

Beschreibung: The Antarctic continental shelves and slopes occupy relatively small areas, but, nevertheless, are important for global climate, biogeochemical cycling and ecosystem functioning. Processes of water mass transformation through sea ice formation/melting and ocean–atmosphere interaction are key to the formation of deep and bottom waters as well as determining the heat flux beneath ice shelves. Climate models, however, struggle to capture these physical processes and are unable to reproduce water mass properties of the region. Dynamics at the continental slope are key for correctly modelling climate, yet their small spatial scale presents challenges both for ocean modelling and for observational studies. Cross-slope exchange processes are also vital for the flux of nutrients such as iron from the continental shelf into the mixed layer of the Southern Ocean. An iron-cycling model embedded in an eddy-permitting ocean model reveals the importance of sedimentary iron in fertilizing parts of the Southern Ocean. Ocean gliders play a key role in improving our ability to observe and understand these small-scale processes at the continental shelf break. The Gliders: Excellent New Tools for Observing the Ocean (GENTOO) project deployed three Seagliders for up to two months in early 2012 to sample the water to the east of the Antarctic Peninsula in unprecedented temporal and spatial detail. The glider data resolve small-scale exchange processes across the shelf-break front (the Antarctic Slope Front) and the front's biogeochemical signature. GENTOO demonstrated the capability of ocean gliders to play a key role in a future multi-disciplinary Southern Ocean observing system.

Materialart: Article , PeerReviewed

Format: text

DOI: 10.1098/rsta.2013.0047

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