Investigations on pelagic food webs in mountain lakes - aims and methods

  • Viera STRAŠKRABOVÁ | verastr@hbu.cas.cz
  • Cristiana CALLIERI
  • Presentacion CARRILLO
  • Luis CRUZ-PIZARRO
  • Jan FOTT
  • Petr HARTMAN
  • Miroslav MACEK
  • Juan Manuel MEDINA-SÁNCHEZ
  • Jirí NEDOMA
  • Karel ŠIMEK

Abstract

A methodical approach for the assessment of pelagic biomass and the main carbon fluxes in remote and hardly accessible mountain lakes was elaborated and tested. Number and biomass of bacteria (BAC), autotrophic picoplankton (APP), heterotrophic nanoflagellates (HNF), ciliates (CIL), phytoplankton (PHY), zooplankton smaller than 40 μm (ZOOS) and zooplankton larger than 40 μm (ZOOL) were investigated regularly during two ice-free periods in 13 European mountain lakes (1st level approach – fixed samples elaborated in specialized laboratories). Carbon fluxes measured in 9 lakes included: primary production, exudation by PHY and BAC uptake of exudates, BAC production, elimination of BAC. These processes were measured in the field by specialized teams (2nd level approach). The ranges of values found in mountain lakes were evaluated and possible methodical and interpretative errors discussed. BAC were a significant component of pelagic biomass. The intercomparison between different partners showed differences in bacterial counts lower than 10%, whereas the mean cell volumes measured fluctuated by more than 40%. APP was never found in a significant quantity, except in one lake. HNF and CIL, though regularly found, were usually scarce and only occasionally significant in terms of biomass. The main components of pelagic biomass were BAC, PHY and ZOOL+ZOOS, except for acidified lakes, where zooplankton was very low. In oligotrophic mountain lakes, the percentage of extracellular production in the total primary production was considerable. Bacterial abundance and production often reached values quite comparable with the situation found in lowland mesotrophic lakes during winter.

Downloads

Download data is not yet available.
Published
1999-08-01
Section
Original Articles
Keywords:
microbial loop, phytoplankton, zooplankton, mountain lakes, methods, carbon fluxes
Statistics
Abstract views: 2447

PDF: 722
Share it

PlumX Metrics

PlumX Metrics provide insights into the ways people interact with individual pieces of research output (articles, conference proceedings, book chapters, and many more) in the online environment. Examples include, when research is mentioned in the news or is tweeted about. Collectively known as PlumX Metrics, these metrics are divided into five categories to help make sense of the huge amounts of data involved and to enable analysis by comparing like with like.

How to Cite
1.
STRAŠKRABOVÁ V, CALLIERI C, CARRILLO P, CRUZ-PIZARRO L, FOTT J, HARTMAN P, MACEK M, MEDINA-SÁNCHEZ JM, NEDOMA J, ŠIMEK K. Investigations on pelagic food webs in mountain lakes - aims and methods. jlimnol [Internet]. 1Aug.1999 [cited 23Jan.2020];58(2):77-. Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.1999.77

Most read articles by the same author(s)

1 2 > >>