Zooplankton community composition of high mountain lakes in the Tatra Mts., the Alps in North Tyrol, and Scotland: relationship to pH, depth, organic carbon, and chlorophyll-a concentration

Abstract

Zooplankton community composition of high mountain lakes in the Tatra Mts., the Alps in North Tyrol, and Scotland: relationship to pH, depth, organic carbon, and chlorophyll-a concentration. -Acta Mus. Siles. Sci. Natur., 64: 175-189, 2015.Abstract: The European EMERGE (European Mountain lake Ecosystems: Regionalisation, diaGnostic & socio-economic Evaluation) project was a survey of high mountain lakes (above treeline) across Europe using unified methods of sampling and analysis. The sampling was carried out in summer or autumn 2000, and comprised biological samples, and samples for chemical analysis. Data from three lake districts are used in this paper: the Tatra Mts. in Slovakia and Poland (45 lakes), the Alps in Tyrol in Austria (22 lakes), and Scotland (30 lakes). As it is shown by multiple regression analysis, DTOC (dissolved or total organic carbon) is the key variable for most groups of zooplankton. With increasing DTOC and mostly with chlorophyll-a decreasing, pH increasing and depth decreasing, macrofitrators with coarse filter meshes are replaced by microfiltrators with fine filter meshes. Higher DTOC may increase bacterioplankton production and advantage species able to consume bacteria (microfiltrators). Other zooplankton species also differ in their preference for DTOC, chlorophyll-a, pH and depth, but DTOC being positively correlated with chlorophyll-a and pH positively correlated with depth. It may be caused by their different preference for food quality in terms of C:P ratio.

[RETRACTED] Short-term dynamics and growth parameters of cyanobacteria and microcystins in freshwater from the Sidi-Yacoub dam, North-east of Algeria

“…The second origin of the nutrients found in the superior layers of the water, come from substances accumulated at the bottom of the dam (sediments); these substances reach the upper layer of the water, in particular the euphotic area, by mechanical movement and mixing of water, this considerably stimulates cyanobacteria growth. These spatial and temporal dynamics of hydrological and physic-chemical parameters cause a heterogeneous distribution of phytoplankton communities in the water body (Skála 2015;de Lima Pinheiro et al 2023).…”

Environmental parameters and diversity of diatoms in the Aïn Dalia dam, Northeast of Algeria

“…The composition and distribution of aquatic organisms are usually determined by the spatio-temporal dynamics of the environment. In the biotopes different in hydrological and physic-chemical parameters, the plankton communities differ in species composition and abundance (Skála 2015;Voutilainen et al 2016). Diatoms are used to track the effect of climate (Ruhland et al 2008) and nutrient enrichment (Hall and Smol 2010).…”

Environmental features and dynamics of plankton communities in a mountain glacial moraine lake (Baikal Lake basin, Russia)

“…The high density of cyclopoids and calanoids in the lower layers is also noted in mountain lakes in Switzerland (Winder et al, 2003), Finland (Viljanen et al, 2009), and Russia (Vetsler, 2009;Burmistrova & Ermolaeva, 2013). The location of copepods in deeper, cold, dark and food-poor water layers (below 10 m) is an adaptation to the reduced consumption by fish (Gliwicz & Rowan, 1984), as well as due to the peculiarity of their ecology (low temperature optimum (8-10°С), the ability to store lipids and to actively reproduce in the bottom layers) (Ferrara et al, 2002;Rivyer, 2012;Skála, 2015). The differences in the responses of crustaceans to temperature may be due to different thermal requirements of the taxa (Viljanen et al, 2009).…”

“…The composition and distribution of aquatic organisms are usually determined by the spatiotemporal dynamics of the environment. In the biotopes different in hydrological and physicochemical parameters, the plankton communities differ in species composition and abundance (Skála, 2015;Voutilainen et al, 2016). The aim of the present study is to identify the most important environmental variables regulating patterns in the species composition and structure of phytoplankton and zooplankton in different zones of the glacial Lake Shebety.…”