The distribution of macrobenthos in surface sediments at Fladen Ground stations, North Sea

A general study of structure, biomass estimates and dynamics on the macrofauna was carried out in August 1975 and March 1976 during PREFLEX (1975) and FLEX (1976), the Fladen Ground Experiment. On the basis of these data an attempt was made to estimate macrobenthic production expressed as minimum production (MP). The macrobenthic production is discussed together with meiobenthic annual production and with indirectly estimated microbenthic production in relation to an energy input from the water column of about 25 g C m**-2 year**-1. From the production estimates of the three benthic components a rough energy budget is proposed. Sampling was performed at five stations for endofauna twice during the time of investigation and for epifauna once. At each station two replicate box core samples (30 X 20 cm) were taken for endofauna. Epifauna was sampled with an Agassiz trawl once at each station. The total numbers of endofauna increased from station 1 to 5. This was valid as well for August 1975 (4,233-12,166 individuals per m**2 and 10 cm sediment depth) as for March 1976 (1,008-2,925 individuals). The polychaetes were the dominant organisms with a share of 33 to 62 %. The densities for the endofauna decreased from August 1975 to March 1976 by a mean factor of 2.8. Abundances of epifauna amounted to values between 11 and 102 individuals per 1000 m**2. The biomass dry weights (DWT) for macrobenthic endofauna varied between 0.97 g DWT m**-2 and 6.42 g DWT m**-2 in August 1975 and between 0.27 g DWT m**-2 and 2.64 g DWT m**-2 in March 1976. The mean amounted to 1.74 g DWT m**-2. Dry weights of epifauna biomass gave values between 4.9 and 83.1 g DWT * 1000 m**-2. The minimum production for the total macro-endofauna at Fladen Ground amounted to 1.43 g DWT m**-2 yr**-1 or 0.82 g C m**-2 yr**-1. This resulted in a minimum turnover rate (P/B) of 0.8. The share produced by the polychaetes amounted to 1.06g DWT m**-2 yr**-1 or 74 %.

Laudes regiae; a study in liturgical acclamations and mediaeval ruler worship,

"Index of manuscripts": p. 263-266.

The fundamental issue: documents and marginal notes on the University of California loyalty oath.

Cover-title.

Der ursprung des rundlings.

Reprinted from Globus, v. 79, no. 19.

The sea and its living wonders; a popular account of the marvels of the deep and of the progress of maritime discovery from the earliest ages to the present time,

Mode of access: Internet.

The sea and its living wonders; a popular account of the marvels of the deep and of the progress of maritime discovery from the earliest ages to the present time,

Mode of access: Internet.

Grundsätze und Erfahrungen über den Bau und die Anlegung von Glashäusern aller Art als Glaskästen, Orangerien, kalten, gemässigten, warmen Häusern und Treibhäusern mit der Einrichtung von Rauchkanälen, Wasser- und Dampfheizungen.

Mode of access: Internet.

Picture aids to grass identification /

Cover title.

Centralblatt für Bibliothekswesen.

Editors: 1884- , O. Hartwig and K. Schulz.

Beiheft zum Zentralblatt für Bibliothekswesen.

Editor: 1888-1903, O. Hartwig.

Über die Neigungen und Beugungen des puerperalen uterus : Inaugural-Dissertation zur Erlangung der Doctorwürde ... /

Tesis doctoral Univ. Göttingen.