Colonization of formulated substrates of different composition by benthic macroinvertebrate community in an estuarine ecosystem: a case study of response of benthic invertebrates to substrate alteration  

Rolande. Uwadiae , Deborah Felix
Benthic Ecology Unit, Department of Marine Sciences, University of Lagos, Akoka, Lagos, Nigeria
Author    Correspondence author
International Journal of Marine Science, 2015, Vol. 5, No. 13   doi: 10.5376/ijms.2015.05.0013
Received: 10 Oct., 2014    Accepted: 02 Jan., 2015    Published: 09 Mar., 2015
© 2015 BioPublisher Publishing Platform
This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Uwadiae and Felix, 2015, Colonization of formulated substrates of different composition by benthic macroinvertebrate community in an estuarine ecosystem: a case study of response of benthic invertebrates to substrate alteration, International Journal of Marine Science, Vol.5, No.13 1-11 (doi: 10.5376/ijms.2015.05.0013)

Abstract

Colonization of formulated artificial substrate was investigated in a tropical estuarine ecosystem for six months to determine possible response of benthic macroinvertebrates to disturbance arising from substrate alteration. Five different formulated substrates which served as content for ten cages were used for this experiment. A total of 406 individuals comprising 18 macroinvertebrate species colonized the cages. In overall, cage 1 which is the control recorded the highest number of individuals and average number (8) of colonizing species at a time, while the least number (4) was observed in cage 3. Cages 2, 4, and 5 recorded average of five species each. In terms of number of individuals, cage 1 which is the control, had the highest number (153), followed by cage 2 which recorded 122 individuals. Cages 3, 4 and 5, recorded 41, 61 and 80 individuals respectively. Analysis of temporal variability in the number of species observed in the experimental cages shows that there was a progressive decrease in the number of colonizing species after the second month. Colonizing macroinvertebrate groups were not different from the known resident species in the estuarine lagoon. However, pattern of variation in the number of individuals of colonizing species were remarkably different. The assemblage recorded in this experiment was defined by the populations of two bivalve mollusc; Macoma cumana and Tellina nymphalis, two gastropod mollusc; Pachymelina aurita and Tympanotonus fuscatus and two crustacean arthropods; Clibanarius africanus and Penaeus notialis. Among the FFGs recorded, collector-filterers dominated in number of individuals and species. Nutrient concentrations of formulated substrate had strong effects on number of colonizing individuals and species.

Keywords
Colonization; formulated substrate; benthic macroinvertebrates

Colonization of new surfaces is an important activity in the ecology of benthic communities, and can occur by active movement, drift and adult emergence (Smock, 1990). Dispersal movements (active or passive) can occur in response to several factors (Smock, 1990), with water flow acting as an energetically efficient mechanism on this process. Colonization of substrates can occur through four routes (Williams and Hynes, 1976). Downstream movement is considered one of the most important ways of colonization, occurring primarily by drift, but a
International Journal of Marine Science
• Volume 5
View Options
. PDF(1179KB)
. FPDF(win)
. HTML
. Online fPDF
Associated material
. Readers' comments
Other articles by authors
. Rolande. Uwadiae
. Deborah Felix
Related articles
. Colonization
. formulated substrate
. benthic macroinvertebrates
Tools
. Email to a friend
. Post a comment