Long-term changes in zooplankton abundance and water transparency in Lake Geneva

Hydrobiologia ◽  
1990 ◽  
Vol 207 (1) ◽  
pp. 31-36
Author(s):  
G�rard Balvay
Keyword(s):  
Water Transparency ◽  
Zooplankton Abundance ◽  
Lake Geneva ◽  
Long Term Changes

scholarly journals Long-term changes in the copepod community of Lake Geneva

2006 ◽  
Vol 29 (suppl_1) ◽  
pp. i49-i59 ◽  
Author(s):  
Orlane Anneville ◽  
Juan Carlos Molinero ◽  
Sami Souissi ◽  
Gérard Balvay ◽  
Daniel Gerdeaux
Keyword(s):  
Lake Geneva ◽  
Copepod Community ◽  
Long Term Changes

scholarly journals Long-term changes in the flora and vegetation of Lake Mikołajskie (Poland) as a result of its eutrophication

2014 ◽  
Vol 70 (4) ◽  
pp. 323-334 ◽  
Author(s):  
Barbara Solińska-Górnicka ◽  
Ewa Symonides
Keyword(s):  
Species Richness ◽  
New Species ◽  
Aquatic Vegetation ◽  
Submerged Macrophytes ◽  
Water Transparency ◽  
Habitat Conditions ◽  
Long Term Changes ◽  
Macrophyte Species ◽  
Consequent Increase

Changes in littoral flora as well as aquatic and swamp vegetation were analysed with increasing eutrophication of the mesotrophic Lake Mikołajskie. Over 30 years the habitat conditions of the lake deteriorated and the phy-tolittoral was reduced from a zone 6 metres wide to one of only 2 metres. In addition, the number of submerged macrophyte species decreased by 50% and the frequency of most of the remaining species declined severalfold. No new species were encountered. Species retreating from the lake littoral included all <em>Chara</em> species, <em>Potamogeton obtusifolius</em>, <em>P. natans</em> and <em>Hydrocharis morsus-ranae</em>. A significant lowering of the phytosociological diversity and species richness of aquatic and swamp communities was observed. By 1994, six of the 12 associations identified in 1964 and representing the submerged and floating-leaved vegetation (e.g. <em>Nitellopsidetum ubtusae</em>, <em>Charetum asperae</em> and <em>Potamogetonetum compressi</em>) were no longer present. In turn, 6 swamp communities from among the original 14 identified in the lake were lacking (e.g. <em>Typhetum angustifoliae</em>, <em>Sugittario-Sparganietum emersi</em> and <em>Eleocharitetum palustris</em>). At the same time, two new aquatic and swamp communities appeared (<em>Ranunculetum circinuti</em>, <em>Myriophylletum spicati</em>, <em>Caricetum acutiformis</em> and <em>Caricetum distichae</em>). In contrast there was an increase in the species richness of reedswamp communities due to an influx of marshland species. While the 1990s witnessed a distinct decrease in concentrations of nutrients in Lake Mikołajskie, the consequent increase in water transparency was not associated with an increase in the area of submerged macrophytes, or the species richness of aquatic vegetation.

scholarly journals Anthropogenic and climate forcing on the long-term changes of planktonic rotifers in Lake Geneva, Europe

2006 ◽  
Vol 28 (3) ◽  
pp. 287-296 ◽  
Author(s):  
Juan Carlos Molinero ◽  
Orlane Anneville ◽  
Sami Souissi ◽  
Gérard Balvay ◽  
Daniel Gerdeaux
Keyword(s):  
Climate Forcing ◽  
Lake Geneva ◽  
Long Term Changes ◽  
Planktonic Rotifers

Analysis of Long-term Changes of Days with 25℃ or Higher Air Temperatures in Jeju

2016 ◽  
Vol 7 (1) ◽  
pp. 31 ◽  
Author(s):  
Jae-Won Choi ◽  
Yumi Cha ◽  
Jeoung-Yun Kim ◽  
Cheol-Hong Park
Keyword(s):  
Air Temperatures ◽  
Long Term Changes
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