<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The diel variability of algal and bacterial chlorophyll and the physicochemical parameters (temperature, pH, dissolved oxygen, conductivity, transparency) in the vertical profile of three mid-forest humic lakes in Drawa National Park (northwest Poland) were analyzed in summer. The euphotic zone consisted of the smaller part of the water column in poly- and mesohumic lakes but almost the whole water column of the oligohumic lake. The 24-hour dynamics of chlorophyll <italic>a</italic> and bacteriochlorophyll <italic>d</italic>+<italic>e</italic> in poly- and mesohumic lake was significantly smaller than that in the polyhumic lake. The maximum concentrations of chlorophyll <italic>a</italic> and bacteriochlorophyll <italic>d</italic>+<italic>e</italic> were observed near the bottom border or below the euphotic zone in waters with oxygen deficits and containing sulfur hydrogen. The main producers of chlorophyll in meso- and oligohumic lake were green anaerobic sulphuric bacteria.</p>
</abstract>

The diel variability of algal and bacterial chlorophyll and the physicochemical parameters (temperature, pH, dissolved oxygen, conductivity, transparency) in the vertical profile of three mid-forest humic lakes in Drawa National Park (northwest Poland) were analyzed in summer. The euphotic zone consisted of the smaller part of the water column in poly- and mesohumic lakes but almost the whole water column of the oligohumic lake. The 24-hour dynamics of chlorophyll a and bacteriochlorophyll d+e in poly- and mesohumic lake was significantly smaller than that in the polyhumic lake. The maximum concentrations of chlorophyll a and bacteriochlorophyll d+e were observed near the bottom border or below the euphotic zone in waters with oxygen deficits and containing sulfur hydrogen. The main producers of chlorophyll in meso- and oligohumic lake were green anaerobic sulphuric bacteria.

Diel dynamics of vertical changes of chlorophyll and bacteriochlorophyll in small humic lakes

Oceanological and Hydrobiological Studies

The diel variability of algal and bacterial chlorophyll and the physicochemical parameters (temperature, pH, dissolved oxygen, conductivity, transparency) in...

Diel dynamics of vertical changes of chlorophyll and bacteriochlorophyll in small humic lakes

Published Online: Sep 29, 2010

Page range: 103 - 111

DOI: https://doi.org/10.2478/v10009-010-0044-2

Keywords
diel dynamics, chlorophyll, bacteriochlorophyll +, Zeu, humic lakes

This content is open access.

Diel dynamics of vertical changes of chlorophyll and bacteriochlorophyll in small humic lakes

Published Online: Sep 29, 2010

Page range: 103 - 111

DOI: https://doi.org/10.2478/v10009-010-0044-2

Keywordsdiel dynamics, chlorophyll, bacteriochlorophyll +, Zeu, humic lakes

This content is open access.

Keywords
diel dynamics, chlorophyll, bacteriochlorophyll +, Zeu, humic lakes