Relationships between epipelic diatoms, aquatic macrophytes, and water quality in Akarçay Stream, Afyonkarahisar, Turkey

Abstract

The Akarçay is the most important stream in the Afyonkarahisar region in central Turkey. In this study, the relationships between epipelic diatoms, macrophytes, and the water quality of Akarçay Stream are presented. According to Canonical Correspondence Analysis (CCA), BOD5, COD, TDS, NH4-N, NO2-N, and PO4-P had the most significant effects on the diatom and macrophyte community structures of the stream. According to CCA and Correspondence Analysis (CA), dominant diatom species and macrophytes constituted two groups, eutrophic and polluted. While eutraphentic taxa were abundant among upstream diatoms, hypereutraphentic taxa were found downstream in the Akarçay. The diatom assemblages in the sites upstream were generally characterized by an abundance of β-mesosaprobous and α-mesosaprobous species, while the diatom assemblages downstream had a very high abundance of

Macrophytes as a tool for assessing the trophic status of a river: a case study of the upper Oum Er Rbia Basin (Morocco)

“…Our correlation analysis shows that the IBMR index depends not only on the nutrient parameters but also on other abiotic parameters such as water temperature (WT), electrical conductivity (EC), which explain the distribution of macrophytes more effectively than nitrate (NO 3 -N) and nitrite (NO 2 -N) in the upper Oum Er Rbia basin. Our results support other studies carried out in several countries (Demars et al 2012;Kargioglu et al 2012;Manera et al 2014;Özbay et al 2019). The results also showed a positive correlation between the IBMR values and nitrate (NO 3 -N).…”

First Biological Monitoring in the Akarçay Basin According to the Water Framework Directive: Phytoplankton and Phytobenthos

“…The precipitation area of Akarçay Basin is 7605 km2 and the mean annual precipitation changes between 400 and 500 mm. The climate of the basin is continental type with a temperature of 20-25oC in summer and 0-3oC in winter (Anonymous 2013b; Kargıoğlu et al 2012).…”

“…Regarding the diatom studies which were carried out in Akarçay Basin, 107 epipelic diatoms were identified as a result of the sampling on a monthly basis from four points from March to December in 2008 in Akarçay River . Water quality was assessed according to epipelic diatoms and aquatic macrophytes which were sampled in the Akarçay River (Kargıoğlu et al 2012). The correlation between diatom indices and environmental variables were also examined .…”

New taxa of the genus Navicula (Bacillariophyceae) in the diatom flora of Serbia

“…This widespread genus (Wojtal 2001, Van dr Vijver et al 2010, Guiry 2013, DeNicola 2000, Lange-Bertalot et al 2003, Witak 2013, Kargıoğlu et al 2012, which includes more than a thousand species organized in 15 sections (Hustedt 1961-1966, Van-Landingham 1975, was modified several times (Patrick 1959;Cox 1979Cox , 1999Round et al 1990;Lange-Bertalot 2001).…”