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2003 | 45 | 4 |

Tytuł artykułu

Alexandrium minutum cysts in sediment cores from the Eastern Harbour of Alexandria, Egypt

Treść / Zawartość

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Alexandrium minutum cysts were studied in sediment cores from its type locality, the Eastern Harbour of Alexandria, following the disappearance of the species from the plankton since 1994. Three cores were sampled in the summer of 1999 along the north-south axis of the harbour. The sediments were subjected to grain size analysis and their organic carbon content was determined. The sediments consisted of medium, coarse and very coarse sand. Grain size and organic carbon content were negatively and significantly correlated in core 1 but followed a parallel trend in cores 2 and 3. Seven dinoflagellate cysts, representing 6 genera were identified from the cores. Their relative abundance showed a remarkable difference. A. minutum cysts contributed a maximum of 17.4% to the total cysts. The distribution profile of A. minutum cysts in the cores reflects the bloom duration but not its productivity. The cyst distribution in the cores is the resultant of two opposite processes, the sedimentation rate and the continuous erosion of the bottom sediments, which is not related to sediment texture.

Słowa kluczowe

Wydawca

-

Czasopismo

Rocznik

Tom

45

Numer

4

Opis fizyczny

p.721-731,fig.,ref.

Twórcy

autor
  • Alexandria University, EG-21511 Alexandria, Egypt
autor

Bibliografia

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  • El-Fishawi N.M., Khafagy A.A., Fanos M.A., Frihy O. E., 1993, Volumetric and hydrographic changes of bottom sediments between 1936–1989, the Eastern Harbour of Alexandria, Egypt, Int. Union Quat. Res., INQUA, 15, 59–66.
  • El-Sayed M.Kh., Khadr A., 1999, Technical report, Workshop on status of the pilot project for the sustainable development of the submarine Archaeological sites at Qayet bey Citadel and Eastern Harbour, Alexandria, 50 pp.
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  • Ismael A.A., Halim Y., 2001, Occurrence and succession of potentially harmful phytoplankton species in the Eastern Harbour of Alexandria, Proc. 9th Int. Conf. Harmful Algal Blooms, Hobart (Australia) 2000, G.M. Hallegraeff, S. I. Blackburn, C. J. Bolch & R. J. Lewis (eds.), IOC UNESCO, Paris, 141–144.
  • Ismael A.A., Khadr A.M., Halim Y., 2001, Dinoflagellate cysts from the sediments of the eutrophic Eastern Harbour of Alexandria, Egypt, Rapp. Comm. Int. Mer M´edit. (CIESM) 36, 392 pp.
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  • Labib W., Halim Y., 1995, Diel vertical migration and toxicity of Alexandrium minutum Halim red tide in Alexandria, Egypt, Mar. Life, 5 (1), 11–17.
  • Matsuoka K., 2001, Discussion. Further evidence for a marine dinoflagellate cysts as an indicator of eutrophication in Yokohoma Port, Tokyo Bay, Japan. Comments on a discussion by B. Dale, Sci. Tot. Environ., 264 (3), 221–233.
  • Matsuoka K., Fukuyo Y., Anderson D.M., 1989, Methods for modern dinoflagellate cyst studies, [in:] Red tides: biology, environmental science and toxicology, T. Okaichi, D.M. Anderson & T. Nemato (eds.), Elsevier, New York, 461–479.
  • Nessim R.B., 1994, Nitrogen and phosphorus forms in Alexandria Western Harbour, pp. 1–16, Proc. 4th Int. Conf. ‘Environmental protection is a must’, NIOF/USPD, Alexandria.
  • Steidinger K.A., 1975, Basic factors influencing red tides, [in:] Toxic dinoflagellates blooms, pp. 153–162, V.R. LociCicero (ed.), Proc. 1st Int. Conf. Mass. Sci. Technol. Found., Wakefield.
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  • Zaghloul F.A., 1988, Some physico-chemical indices of eutrophication in the Eastern Harbour of Alexandria, Bull. Natl. Inst. Oceanogr. Fish. (Egypt), 114 (2), 39–53.
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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.agro-article-8aab8740-8be4-4ddb-95a2-f0f639e99e64
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