1962

Benthic community associated with coral reefs in the coastal area of Gulf of Aqaba, Red Scs, Egypt

Article

Last updated: 01 Jan 2025

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Tags

Fisheries

Abstract

Benthic community associated with coral reefs was investigated at four sites along the coastline of Gulf of Aqaba, Red Sea Egypt. The four sites (Taba, Nuweiba, Dahab and Shann El-Sheikh) are important popular spots for recreational activities and the reefs of these sites are of fringing type. Drupella cornus and Trochus maculatus were the most important gastropods associated with coral reefs. Taba and Sharm El-Sheikh showed high occurrence of worm shells (Gastropoda) Dendropdma maximum (up to 30 individuals / colony). Concerning the abundance of bivalves (Mollusca), Taba showed greater abundance of Spondylus varium and Pteria penguin ^ whereas Sharm El-Sheikh had the greatest abundance of Tridacna maxima (up to 40 individuals/lOm). The studied sites exhibited high density of Echinoderms, particularly the sea urchins Diadema setosvm, Tripneitstes gratilla and Heterocentrotus mammillatus. The study revealed selective associations between mollusc species and coral growth forms. The bivalve Pteriapenguin was found to be attached with plate-like coral Mellipora platyphylla and the branching coral Millepora dichotoma. The vennetid gastropod Dendropoma maximum was also found to be inserted into the Melliporid coral colonies. Aggregates of Drupella cornus were observed attached with branching corals, especially Acropora spp. and Stylophora spp. In contrast to the Drupella cornus, the corallivore gastropod CoralUphila neritoidea and the bivalve Tridacna maxima were predominantly preying on the massive corals of Poriies spp. The distribution of coral growth forms was compared. In general, massive, branched and plate-like colonies were the dominant growth forms of corals in the area of study. Massive colonies were dominant in the reef flat area, reef margin and the deep parts of the outer reef slope. Branching coral colonies were flourishing on the fringing reef flat, the barrier reef flat and the outer reef slope until 10m depth (upper layers of outer reef slope), their importance declined with depth. All plate-like coral colonies in the area of study belong to Hydrocorals (Milleporidae); Millepora platyphyla. They are abundant in the reef edge and upper zone of outer reef slope (the reef zone exposed to high wave action). The considerable abundance of macroalgae in the coral communities of the sampling sites were probably resulting from increased levels of nutrients caused by enhanced terrestrial runoff of sewage and sediments concomitant with increased human pressure in the area and coastalĀ development for tourism expansion. The present study attracts the attention to the problem that the benthic community undergoes adverse influences of enhanced human pressure concomitant with growth of coastal cities and intensive constructions for tourism development in the Gulf of Aqaba. This is indicated by increased boring organisms, coral bioeroders and abundance of macroalgae.

DOI

10.21608/ejabf.2007.1962

Keywords

Benthos, Coral reefs, Gulf of Aqaba, Red Sea, Egypt

Authors

First Name

Abdel -Hamid

Last Name

All

MiddleName

-

Affiliation

National Institute of Oceanography and Fisheries, Red Sea and Gulfs of Suez & Aqaba branch, Egypt

Email

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City

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Orcid

-

First Name

Ahmed

Last Name

Emara

MiddleName

-

Affiliation

National Institute of Oceanography and Fisheries, Red Sea and Gulfs of Suez & Aqaba branch, Egypt

Email

-

City

-

Orcid

-

Volume

11

Article Issue

4

Related Issue

414

Issue Date

2007-09-01

Receive Date

2017-04-02

Publish Date

2007-09-01

Page Start

95

Page End

108

Print ISSN

1110-6131

Online ISSN

2536-9814

Link

https://ejabf.journals.ekb.eg/article_1962.html

Detail API

https://ejabf.journals.ekb.eg/service?article_code=1962

Order

7

Type

Original Article

Type Code

103

Publication Type

Journal

Publication Title

Egyptian Journal of Aquatic Biology and Fisheries

Publication Link

https://ejabf.journals.ekb.eg/

MainTitle

Benthic community associated with coral reefs in the coastal area of Gulf of Aqaba, Red Scs, Egypt

Details

Type

Article

Created At

22 Jan 2023