caa a22 4500 467903905 CHVBK 20180406152827.0 cr unu---uuuuu 170328e20061001xx s 000 0 eng 10.1007/s10661-005-9107-3 doi (NATIONALLICENCE)springer-10.1007/s10661-005-9107-3 Productivity and Distribution of Epipellic Microalgae Along Salinity Gradients in Mangrove Swamp of the Qua Iboe Estuary (NIGERIA) [Elektronische Daten] [J. Essien, R. Ubom, S. Antai] Based on spatial variation in tidal mud salinity, direct gradient analysis procedures were adopted to relate the productivity and distribution of epipellic microalgae along salinity gradients in mangrove swamp of the Qua Iboe Estuary. Variations in mud salinities were due to distance from the coast, tidal incursions and freshwater input. The dilution effect of fresh water input from rainfall, urban runoff and associated freshwater creeks was most severe during the rainy season month of July, with much lower salinity levels recorded, in comparison to higher salinity values, recorded for same sampling locations during the drier month of December. In the dry season, all the microalgae species but Closterium (a genus of soft, green algae) and Oscillatoria (a cyanobacterium) species encountered in the tidal mud flats showed statistically significant negative correlations with salinity, while most microalgae species excluding Oscillatoria and Closterium species were positively correlated with the same factor during the wet season. Four Ecological Groups of microalgae, were established in the dry season month of December as against two Ecological Groups in the wet season month of July. However no microalgae species was found to occur on the highest values of mud salinity and there were overlapping range of occurrences and ecological optima for most species along the gradients. Springer Science+Business Media, Inc., 2006 epipellic microalgae nationallicence salinity gradients nationallicence mangrove swamp nationallicence Essien J. Department of Microbiology, Environmental Microbiology and Biotechnology Unit, University of Calabar, P. M. B. 1115, Calabar, Nigeria aut Ubom R. Department of Botany and Microbiology, University of Uyo, P. M. B. 1017, Uyo, Nigeria aut Antai S. Department of Microbiology, Environmental Microbiology and Biotechnology Unit, University of Calabar, P. M. B. 1115, Calabar, Nigeria aut Environmental Monitoring and Assessment Springer Netherlands 121/1-3(2006-10-01), 65-75 0167-6369 121:1-3<65 2006 121 10661 https://doi.org/10.1007/s10661-005-9107-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-005-9107-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Essien J. Department of Microbiology, Environmental Microbiology and Biotechnology Unit, University of Calabar, P. M. B. 1115, Calabar, Nigeria aut NATIONALLICENCE 700 1- Ubom R. Department of Botany and Microbiology, University of Uyo, P. M. B. 1017, Uyo, Nigeria aut NATIONALLICENCE 700 1- Antai S. Department of Microbiology, Environmental Microbiology and Biotechnology Unit, University of Calabar, P. M. B. 1115, Calabar, Nigeria aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Springer Netherlands 121/1-3(2006-10-01), 65-75 0167-6369 121:1-3<65 2006 121 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer