|Some quantitative data on light penetration in sediments|Gomoiu, M.-T. (1967). Some quantitative data on light penetration in sediments. Helgol. Wiss. Meeresunters. 15(1-4): 120-127. dx.doi.org/10.1007/BF01618614
In: Helgoländer Wissenschaftliche Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0017-9957, more
|Also published as |
- Gomoiu, M.-T. (1967). Some quantitative data on light penetration in sediments, in: Kinne, O. et al. (Ed.) (1967). Vorträge und Diskussionen. Erstes Europäisches Symposion über Meeresbiologie = Papers and discussions. First European Symposium on Marine Biology = Rapports et discussions. Premier symposium européen sur biologie marine. Helgoländer Wissenschaftliche Meeresuntersuchungen, 15(1-4): pp. 120-127. dx.doi.org/10.1007/BF01618614, more
1. Light penetration in sediments is a function of sediment granulometry; it decreases with the decrease in grain size.
2. Light quantities entering the sediments are a function of substrate depth: At 1 mm depth, light penetration ranges between 80 (at medium quartzy sands from Hel) and 2 (at very fine sands from the Black Sea) percent of the light quantities found at the substrate surface; at 2 mm depth light penetration varies between 52 percent and total darkness (when muds replace sand); at 3 mm depth it varies between 0 and 23 per cent; at 4 mm depth, in most samples the aphotic zone was reached; however, in some sediments (quartzy medium or coarse-medium sands) values up to 9 per cent may occur; at 5 mm depth out of 46 analysed samples only 5 contained up to 5 per cent light; at 6 mm depth the lowest readings of down to 3 per cent were obtained.
3. On the basis of these data, the photic zone in sandy sediments is very thin.