title: Population fluctuation and vertical distribution of meiofauna in the Red Sea interstitial environment.
abstract: The composition and distribution of the benthic meiofauna assemblages of the Egyptian coasts along the Red Sea are described in relation to abiotic variables. Sediment samples were collected seasonally from three stations chosen along the Red Sea to observe the meiofaunal community structure, its temporal distribution and vertical fluctuation in relation to environmental conditions of the Red Sea marine ecosystem. The temperature, salinity, pH, dissolved oxygen, and redox potential were measured at the time of collection. The water content of the sediments, total organic matters and chlorophyll a values were determined, and sediment samples were subjected to granulometric analysis. A total of 10 meiofauna taxa were identified, with the meiofauna being primarily represented by nematodes (on annual average from 42% to 84%), harpacticoids, polycheates and ostracodes; and the meiofauna abundances ranging from 41 to 167 ind./10 cm(2). The meiofaunal population density fluctuated seasonally with a peak of 192.52 ind./10 cm(2) during summer at station II. The vertical zonation in the distribution of meiofaunal community was significantly correlated with interstitial water, chlorophyll a and total organic matter values. The present study indicates the existence of the well diversified meiofaunal group which can serve as food for higher trophic levels in the Red Sea interstitial environment.
authors.affiliation: Department of Zoology, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia ; Department of Marine Science, Faculty of Science, Port Said University, Egypt.
authors.forename: Hamed A
authors.initials: HA
authors.lastname: El-Serehy
authors.affiliation: Department of Zoology, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
authors.forename: Fahad A
authors.initials: FA
authors.lastname: Al-Misned
authors.affiliation: Department of Zoology, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
authors.forename: Khaled A
authors.initials: KA
authors.lastname: Al-Rasheid
keywords: Benthos; Diversity; Meiofauna; Red Sea