Nutrient, benthic algae relationships in the Sinop Karagol-Aksaz Marsh, Turkey

摘要

Investigation of nutrient and?composition?of?benthic?algae from?chosen?random sampling station on Karag?l-Aksaz Marsh were researched between?November?2005?and November?2006.?In?addition, some physical and chemical parameters (soluble reactive phosphorus, total phosphorus, NH4, NO3, Cl, chlorophyll-a?(Chl-a), carotenoid, pH, O2) were measured. Benthic algae diversity was calculated by using the Shannon-Weaver (H') and evenness (J) index. (H') indices varied from 1.03 to 1.48, and (J) from 0.42 to 0.67. Cluster analysis produced the three major groups, A-B swamp-wet and C swamp-dry, and occurs at the highest level of similarity. The analyses were recognized at the 0.4 dissimilarity level. A total of 55 benthic algae taxa were identified in Karg?l-Aksaz Marsh lake. Although the species of genus?Gomphosphaeria?spp.,?Dictyosphaeriumspp.,?Navicula?spp., and?Gomphonema?spp. constituted the main composition of the benthic flora, the species belonging to genus?Sellaphora?spp.,?Frustulia?spp.,?Pinnularia?spp. and?Stauroneis?spp. were found to be less numerous. The flora as a whole increased in March, April and May (swamp-wet) and decreased in July and August (swamp-dry).