Begell House Inc.
International Journal on Algae
IJA
1521-9429
9
1
2007
Contemporary morpho-functional transformation of seaweed communities of the Zernov phyllophora field (Black Sea)
1-21
10.1615/InterJAlgae.v9.i1.10
G. G.
Minicheva
Institute of Marine Biology, National Academy of Sciences of Ukraine 37, Pushkinskaya St., Odesa 65048, Ukraine
According to the results of two international cruises in 2004 and 2006, the contemporary morpho-functional organization of macrophytes of the Zernov phyllophora field was considered. It was shown that Phyllophora Grev. communities are replaced by fine, ramified filamentous algae (Polysiphonia sanguinea (Ag.) Zanard., Feldmannia irregularis (Kütz.) Hamel., Desmarestia viridis (O. Müll. in Hornem.) J.V. Lamour.), the ecological activity of which according to indices of specific surface are from 10- to 40-fold greater than in the phytobenthos of the Danube − Dnieper interfluve and deepwater shelf communities subject to eutrophication. At present, the Phyllophora communities have undergone analogous changes to those that took place in coastal Cystoseira communities in the 1970s-1980s.
Water quality and phytoplankton of major lentic water bodies of the northeastern region of Turkey (Erzurum vicinity)
22-40
10.1615/InterJAlgae.v9.i1.20
Ersin
Kivrak
Atatürk University, K. Karabekir Education Faculty, Department of Biology Education, 25240 Erzurum; and Afyonkarahisar Kocatepe University, Faculty of Education, Department of Biology Education, 03200 Afyonkarahisar, Turkey
Hasan
Gurbuz
Atatürk University, K. Karabekir Education Faculty, Department of Biology Education, 25240 Erzurum, Turkey
Zekeriya
Altuner
Gaziosmanpasa University, Faculty of Arts and Science, Department of Biology, 60200 Tokat, Turkey
Ali
Sulun
Atatürk University, Faculty of Education, 24030 Erzincan, Turkey
This paper reports the results of a long-term research related to water quality, trophic status and phytoplankton species composition of major lentic water bodies in northeastern Turkey. Phytoplankton of studied water bodies consisted of 253 taxa from 79 genera belonging to Bacillariophyta, Chlorophyta, Cyanophyta, Euglenophyta, Dinophyta, and Chrysophyta. Bacillariophyta were generally dominant in the phytoplankton community of studied water bodies. Seasonal development of phytoplankton exhibited two peaks: one in late spring and the other one in autumn. The trophic status and water quality properties of the studied water bodies are discussed in detail in the text.
Selecting appropriate bioindicators regarding Water Framework Directive guidelines for freshwaters -a Macedonian experience
41-63
10.1615/InterJAlgae.v9.i1.30
Svetislav
Krstic
Faculty of Natural Sciences and Mathematics, St. Ciril and Methodius University, Skopje Macedonia
Zorica
Svircev
Faculty of Natural Sciences, University of Novi Sad, Novi Sad, Serbia and Montenegro
Zlatko
Levkov
Faculty of Natural Sciences and Mathematics, St. Ciril and Methodius University, Skopje Macedonia
Teofil
Nakov
Faculty of Natural Sciences and Mathematics, St. Ciril and Methodius University, Skopje Macedonia
In light of WFD (Water Framework Directive) guidelines for freshwater monitoring, this paper addresses the suggested organisms to be used in regular biomonitoring systems. Based on critical observations and reported obstacles in applying the various developed methods, but also on long-term research on freshwater ecosystems in Macedonia, the best bioindicator organism is proposed. In order to have an overall assessment of the investigated ecosystem, biomonitoring organisms (such as fish, macrophytes) or geomorphology reveal important informations. But, if the target is rapid, reliable, and cost effective bioindication of the water quality (with algae and benthic invertebrates only) have a most comprehensive application in history. Accumulated evidence that using benthic invertebrates pose a problem in obtaining reliable results triggered a recent CEN's revision of their applicability in monitoring programs. Therefore, amid all critically addressed disadvantages, algae (benthic diatoms in particular) are recommented as the best solution and basic methodology given for being included in regular bioindication programs in rapid detection of water quality of lotic and lenthic freshwater environments.
Seasonal dynamics of phytoplankton and their relationship with the environment in the Pavana and Mutha rivers (Pune-India)
64-80
10.1615/InterJAlgae.v9.i1.40
N. G.
Jafari
Department of Environmental Sciences, University of Pune, India
V. R.
Gunale
Department of Botany, University of Pune, India
Distribution patterns of algal flora assemblages in two rivers in Pune-India, and their relation to different environmental gradients are presented. Two sets of factors were evident; one was associated with water chemistry and the other to phytoplankton taxonomic composition, abundance, seasonal variability and distribution were examined. The various indices calculated for post-monsoon, winter and summer clearly indicate increasing nutrient load due to decrease in natural flow of water. These indices help us to understand the change in algal community structure. One hundredth-ninety two species were identified from four divisions of algae, Chlorophyceae, Bacillariophyceae, Cyanophyceae, and Euglenophyceae prevail. The enhanced growth of the algal flora was noticed during summer period which could be attributed due to increased temperature and light during this season. Scenedesmus, Stigeoclonium, Cosmarium, Pediastrum, Closterium, Oscillatoria, Anabaena, Microcystis, Navicula, Nitzschia, Euglena and Phacus were the most abundant of algal flora. Shannon-Wiener diversity indices for phytoplankton in the epilimnion followed very similar seasonal patterns in these rivers, supporting the hypothesis that in freshwaters, diversity patterns of these groups are linked. Correlation between phosphorus and abundance further supported the former conclusion that phosphorus is the controlling factor in phytoplankton growth. This study prove that after a drastic change of ecological conditions the regeneration of the planktonic life of the rivers started rapidly, we suggest that when using algal to evaluate water quality, ecoregional characteristics of river stretches should also be considered.
Effect of seasons on phytoplankton of the Asejire Reservoir (Nigeria)
81-88
10.1615/InterJAlgae.v9.i1.50
S. A.
Akinyemi
Department of Biology School of Science Oyo State College of Education, Nigeria
D. I.
Nwankwo
Department of Marine Biology Faculty of Science University of Lagos Akoka, Lagos, Nigeria
Studies on the effect of seasons on phytoplankton of the Asejire Reservoir were carried out for two years. Two sets of water samples were collected, one to test for physical and chemical characteristics and the second sample for identification of phytoplankton species in the reservoir. The physico-chemical parameters showed significant variations for rainy and dry seasons. The most abundant phytoplankton species was Microcystis aeruginosa Kütz., which has been reported in the literature as toxin-producing alga. Variations in the abundance of phytoplankton were influenced by the changes in the chemical characteristic of the water.
The history of diatom research in Russia
89-104
10.1615/InterJAlgae.v9.i1.60
N. I.
Strelnikova
Department of Botany, Biological-Soil Faculty, St. Petersburg State University, 7/9, Universitetskaya Naberezhnaya St., 199034 St. Petersburg, Russia
The history of diatom research in Russia is part of a tercentennial history of diatomology. Throughout this period, Russian phycologists contributed to its progress. Brief biographies and main publications of Russian diatomologists from the 18th century up to 2005 are presented.