By C. S. Reynolds, J.-P. Descy, J. Padisák (auth.), Jean-Pierre Descy, Colin S. Reynolds, Judit Padisák (eds.)

The ecology of potamoplankton has bought much less realization than lake plankton. those complaints produce a synthesis of the composition, group constitution and dynamics of lotic phytoplankton, that are intuitively submitted to a powerful actual keep an eye on within the flowing setting, perceived as even more `disturbed' than a lake, even than a well-mixed shallow one. It seems that the boundary among the phytoplankton of rivers and lakes isn't as simple as used to be inspiration. specifically, so much contributions supply arguments emphasizing the popular position of actual keep an eye on in either aquatic platforms, specially a result of steep mild gradient because of turbulent blending in a turbid water column. Similarities and variations among potamoplankton and limnoplankton, mostly according to the data collected by way of the individuals are mentioned within the introductory paper through Reynolds et al.

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Extra resources for Phytoplankton in Turbid Environments: Rivers and Shallow Lakes: Proceedings of the 9th Workshop of the International Association of Phytoplankton Taxonomy and Ecology (IAP) held in Mont Rigi (Belgium), 10–18 July 1993

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TIIt ~,. __ . -- "1. '-.. - --_.. _- - - - - - - - - - - Fi[{ 7. Relative chlorophyll-colltent (as '70 referring to biomass freshweight) in Neusiedlersee. sampling station I, 1987-1 992, exposed to water level f1uctuations caused by climatic changes. The mesotrophic lake has a high salt-content, is alkaline and very turbid. 5-10. 8 m; higher values occur only under ice). The lake sediment is characterized by smalI, slowly settling, fine grained inorganic particles. Lg-P I- I) are usually higher than the level that is considered limiting in other lakes.

_, 2000 d 1500 1000 500 O~~~~~~~~~~~~~ 1987 1988 1989 1990 1991 1992 O~--~--~~~~-Ja_~~~~ 1987 1988 1989 1990 1991 1992 Fig 9. Biomass changes (I'g 1- I fresh weight) of blue-green algae (a) , chryptophytes (b), diatoms (c) and green algac (d) in Neusiedlersee, sUl11pling station 1. 1987-1992. Sampling and methods Large volume phytoplankton sam pIes representing the approx. upper 40 cm water layers were taken by the staff ofthe Illmitz Biological Station from various sampling stations during the ice-free periods since the summer of 1987 (Fig.

Fragilaria biomass changes within a wide range at alm ost any time of the vegetation period. The population density can rise or decline by two orders of magnitude from one week to another (Fig. 11 a). However, if the data are expressed as running average, population dynamics of this alga can be described as it is usual (Fig. Ilb). In this way, two seasonal growing phases can be separated; the first in early spring, the 34 Chroococcus minutus 100~----------------~ Chroococcus limneticus 30~--------------------.

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