+ Translate

Primary production of micro phyto benthos in the ems dollard estuary the netherlands

, : Primary production of micro phyto benthos in the ems dollard estuary the netherlands. Marine Ecology Progress Series 14(2-3): 185-196

From 1976-1978 primary production of microphytobenthos was measured at 6 stations on intertidal flats in the Ems-Dollard estuary using the 14C method. The purpose of the measurements was to estimate the annual primary production at different sites in the estuary and to investigate the factors that influence the rates of primary production. Benthic chlorophyll a and a set of environmental factors were measured. Only primary production correlated significantly with chlorophyll a concentration in the superficial (0.5 cm) sediment layer; other factors (temperature, in situ irradiance) did not correlate with primary production, primary production rate or assimilation number. Annual primary production ranged from circa 50-250 g C m-2 and was closely related to elevation of the tidal flat station. Highest values were also recorded at the station closest to a waste water discharge point in the inner part of the estuary. Annual primary production can be roughly estimated from the mean annual content of chlorophyll a in the sediment. Use of different calculation methods results in annual primary production values that do not differ greatly from each other. Also productivity rates did not differ much over most of the estuary, except at the innermost station which showed a high production rate in combination with high microalgal biomass; this could not be explained by the high elevation of the station alone. A hypothesis is offered to explain the limited primary production of microphytobenthic vegetations.

(PDF 0-2 workdays service)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 006184219

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Kasahara, S.; Sano, S., 2015: Treatment strategy toward Fontan completion in hypoplastic left heart syndrome. The Norwood procedure with right ventricle-pulmonary artery (RV-PA) conduit is thought to improve post-operative hemodynamics in hypoplastic left heart syndrome( HLHS). Prematurity( GA<37 weeks), body weight less than 2.5 kg and tricuspid r...

HOUEL.E.; LUSCAN.R.; LAVERHNE.P., 1955: Micro-colposcopy in the diagnosis of cancer of cervix. Bulletin de L'academie Nationale de Medecine 139(1-2): 42-44

Garcia-Parrilla, M.; Ayala, F.E.havarri, J.; Troncoso, A.; Negueruela, A.; Heredia, F., 1998: Measurement of wine vinegars' color: application of the characteristic vector method. As there is no official method to measure the color of wine vinegar, the aim of this work is to propose a quick and simple method to do so with minimum error. Vector analysis was tested and proved to be applicable to the reconstitution of vinegar...

Ijichi, T.; Maruyama, I.; Mori, S.; Nomoto, M.; Osame, M., 1990: Two cases of HTLV-I associated myelopathy (HAM) complicated with Sjögren's syndrome, T-lymphocyte alveolitis and arthropathy. Two cases of HTLV-I-associated myelopathy (HAM) complicated with Sjögren's syndrome (SjS), T-lymphocyte alveolitis and arthropathy were reported. Case 1 was a 55-year-old woman. Since 40 years of age she had been suffering from repetitive pu...

Tooke, F. G. C., 1953: History of Eucalyptus snout-beetle control. Life history of Gonipterus scutellatus, and history of its control in South Africa, with particular reference to biological control.

Muller, Hj, 1974: Observations on the model outline for state legislation on s pecialized veterinary medicine. Tierarztliche Umschau: 29 (11) 630

Scheuer, D.A.; Mifflin, S.W., 1997: Actions of glucocorticoids on the arterial baroreceptor reflex. FASEB Journal 11(3): A18

Cannistra, S.A.; Abu-Jawdeh, G.; Niloff, J.; Strobel, T.; Swanson, L.; Andersen, J.; Ottensmeier, C., 1995: CD44 variant expression is a common feature of epithelial ovarian cancer: lack of association with standard prognostic factors. Purpose: CD44 is a hyaluronic acid receptor that exists as a standard 90-kd form (CD44S) as well as several CD44 variant isoforms produced through alternative splicing. Expression of CD44 variants is associated with clinically aggressive behavior...

Wilhelm, B.; Lüdtke, H.; Peters, T.; Schmid, R.; Wilhelm, H.; Zrenner, E., 2001: Automated swinging flashlight test in patients with optic nerve diseases. The swinging flashlight test is an objective method to diagnose a lesion of the anterior visual pathways. However, errors and faults may easily alter the test's results. Hence, the value of the swinging flashlight test depends highly on the e...

Griffin, G.J., 1974: Some hazards for continuing education at the community college level. Journal of Continuing Education in Nursing 5(1): 38-40