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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Numerical analysis of phytoplankton dynamics

Phạm Thị, Nguyệt Nga. January 1900 (has links)
Proefschrift Universiteit van Amsterdam. / Met lit.opg. - Met samenvatting in het Nederlands.
2

Změny chemizmu a složení fytoplanktonu Brněnské přehrady před a po snížení hladiny

Poliak, Dušan January 2011 (has links)
No description available.
3

Phytoplankton species diversity in the Lednice reservoires

Ramezanpoor, Zohreh January 2004 (has links)
No description available.
4

Ekologie planktonní sinice Cylindrospermopsis raciborskii na jižní Moravě

Rusler, Lukáš January 2012 (has links)
No description available.
5

Photoenhanced toxicity of azaarenes to marine phytoplankton

Wiegman, Saskia, January 2002 (has links)
Proefschrift Universiteit van Amsterdam. / Met lit. opg. - Met samenvatting in het Nederlands.
6

Dynamika rozvoje fytoplanktonu Brněnské přehrady v závislosti na podmínkách prostředí

Straková, Lucie January 2013 (has links)
My PhD. thesis is dealing with the problem of excessive blooms of cyanobacteria at the Brno reservoir. Due to the constant supply of nutrients, this recreation area is faced with the problem of eutrophication for many years. Partial solution was found after thorough limnological research and the first interventions carried out in 2008. Project started with the application of lime on exposed shore which was followed by the coagulation of phosphorus by ferric sulphate and installation of aeration equipment in water column. Part of the measure was the change of the fish stock as well. This project followed the whole process from 2006 to 2011. Water samples were taken from a motor boat at three localities. Physico - chemical parameters of water (pH, dissolved oxygen, water temperature) and amount of chlorophyll were measured in situ by FlouroProbe and YSI Probe. Microscopic analysis of phytoplankton performed in living samples or after fixing with formaldehyde. Our results show significant changes in the composition of phytoplankton biomass and reduce the number of cells per ml of water. New conditions in the aquatic environment are reflected especially during the vegetation seasons 2010 and 2011. Also new results from summer 2012 confirm the effectiveness of this project.
7

Kalkningseffekter på plankton : ett mesokosmexperiment i den kalkrika sjön Tåkern

Gustavsson, Maria January 2015 (has links)
One of today's major environmental issues is algal blooms linked to eutrophication of lakes and oceans. That is a result of anthropogenic influence with nutrient loads (including phosphorus) from agriculture and industry, which benefits primary production (phytoplankton). Studies have shown that phosphorus availability in the water column can be limited by liming, therefore could be a way to counteract eutrophication. This was tested in the agriculturally surrounded lake Tåkern in southern Sweden, which in its present state is an internationally important bird lake and therefore in several respects would be affected by eutrophication. The purpose of this study was to investigate whether liming would be a good solution to solve any future eutrophication problems in Lake Tåkern. Liming experiments were performed in mesocosms during April 2015 with a mixture of limestone and slaked lime. Quantity and diversity of plankton and water chemical variables were measured before and after liming. Moreover, samples of phytoplankton from a similar experiment conducted in July 2014 were analyzed. Liming did not show any effect on neither phyto- nor zooplankton when performed in spring of 2015. During summer of 2014, there was an increase in number of phytoplankton (ml-1 ) and chlorophyll in controls while the study showed constant levels in treated mesocosms. For zooplankton there was no significant effects of liming on neither quantity nor diversity. Results of this study suggest that liming is not the most appropriate method to resolve eutrophication in Lake Tåkern.
8

Immunochemical identification of toxic marine phytoplankton

Vrieling, Engel Gabriël. January 1900 (has links)
Thesis (doctoral)--Rijksuniversiteit Groningen, 1996. / Includes bibliographical references (p. [109]-119).
9

Kvalita vody a složení planktonních společenstev vodní nádrže Opatovice

Hylák, Tomáš January 2014 (has links)
The aim of the diploma thesis was a seven month research at the valley waterworks reservoir called Opatovice by Vyškov na Moravě. Taking of the water samples was carried out once a month from two sampling places, which were located on the leeward and windward sides. On the same day these water samples were analyzed at the Fishery and Hydrobiology Department of the Mendel Univerzity in Brno, where there were determined physical and chemical parameters of water, quantitative and qualitative content of the plankton associations. The results were compared with my bachelor thesis: The Development of the Quality of Water in the waterworks reservoir Opatovice, with the results from the previous years, which were provided by the Water Supply and Sewerage company, plc in Vyškov, with the valid legislation of the Czech Republic and with selected waterworks reservoirs situated in the south Moravian region.
10

Analýza pigmentového složení přírodních společenstev sladkovodních fotosyntetických mikroorganismů / Analysis of phytoplankton pigments from freshwater systems.

ŽIŠKOVÁ, Eva January 2009 (has links)
The aim of this study was to use pigments to determine freshwater phytoplankton composition . The samples were collected from freshwater lakes in the Czech Republic and Germany. The pigment analyses were conducted using the High Performance Liquid Chromatography (HPLC). The HPLC data were processed by computer program CHEMTAX to calculate the composition of phytoplankton. The obtained pigment data were compared with standard light microscopy which was used to obtain more detailed taxonomic resolution.

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