| Título: | Distribution of periphytic diatoms in the rivers of the Lake Ladoga basin (Northwestern Russia) |
| Autores: |
Rusanov, Alexander G.; Institute of Limnology of the Russian Academy of Sciences, St. Petersburg Stanislavskaya, Elena V.; Institute of Limnology of the Russian Academy of Sciences, St. Petersburg Acs, Eva; Institute of Ecology and Botany of the Hungarian Academy of Sciences, Hungarian Danube Research Station |
| Fecha: | 2009-10-21 |
| Publicador: | Acta Botánica Croática |
| Fuente: |
 |
| Tipo: |
Peer-reviewed Article |
| Tema: | Diatom; periphyton; distribution; gradient; eutrophication; Lake Ladoga; Russia |
| Descripción: | Relationships between distribution of periphytic diatoms and environmental variables in 19 rivers of the Lake Ladoga basin (Northwestern Russia) were examined using gradient analysis. On the basis of geology and river water chemistry, the Lake Ladoga basin could be separated into twomain parts, the northern and the southern sub-basin. The rivers in the northern sub-basin are slightly acidic and low in conductivity (mean value 53 mS cm–1); the rivers in the southern sub-basin have neutral to slightly alkaline waters with higher conductivities (mean value 168 mS cm–1). A detrended correspondence analysis (DCA) defined two groups of rivers generally corresponding to the two main parts of the Lake Ladoga basin. Fragilaria capucina var. rumpens, Frustulia saxonica and Tabellaria flocculosa were the typical species for the northern sub-basin, whereas Cocconeis placentula var. euglypta, Ulnaria ulna and Gomphonema parvulum were characteristic species for the southern sub-basin. A canonical correspondence analysis (CCA) identified conductivity, pH, bicarbonate, total phosphorus and water colour as the most important environmental variables related to changes in assemblage structure. Both DCA and CCA ordination showed that conductivity related to geology was the most important variable, while concentration of total phosphorus was the second most important variable. Weighted averaging was used to infer total phosphorus from relative biomass of diatoms. The predictive ability of the inference model was sufficiently strong with r2 = 0.71 and RMSEP = 1.9 mg L–1. These results strongly support the use of a diatom-based inference phosphorus model for indicating eutrophication in the rivers of the Lake Ladoga basin. |
| Idioma: | Inglés |
1 Diatom preservation: differential preservation of sedimentary diatoms in two saline lakes por Flower, Roger J.; Environmental Change Research Centre, University College London,Ryves, David B.; University of Loughborough | 6 A comparative study on the two species of the genus Salvia L. sect. Aethiopis Bentham (Labiatae) from East Anatolia, Turkey por Kahraman, Ahmet; Middle East Technical University, Department of Biological Sciences, 06531 Ankara, Turkey,Dogan, Musa; Middle East Technical University, Department of Biological Sciences, 06531 Ankara, Turkey |
2 Variability of the pennatae diatom Gomphonema ventricosum Gregory from far eastern lakes por Yoshitake, Sakiko; Shonan Junior College,Fukushima, Hiroshi; Institute of Phycology,Kimura, Tsutomu; Institute of Phycology,Lepskaya, Ekatarina V.; Kamchatka Institute for Fisheries Research and Oceanography,Ko-Bayashi, Tuyako; Institute of Phycology | 7 Cytology and palynology of the Clematis L. species (Ranunculaceae) in Iran por Sheidai, Masoud; PROFESSOR,Habibi, Meysam; STUDENT,Azizian, Dina; RETIRED ASSOCIATE PROFESSOR,Khatamsaz, Mahboobeh |
3 Vegetation spatial heterogeneity in a hyper arid Biosphere Reserve area in north Africa por Shaltout, Kamal H.; Botany Department, Faculty of Science, Tanta University, Tanta, Egypt,Sheded, Mohamed Gabr; Professor,Salem, Ashraf I.; National Conservation Sector, Wadi Allaqi Biosphere Reserve, EEAA, Aswan, Egypt | 8 The nutritive value and role of Panicum turgidum Forssk. in the arid ecosystems of the Egyptian desert por Heneidy, Selim Z.; Professor of Plant Ecology,Halmy, Marwa Waseem; Assistant Lecturer |
4 Indirect and direct somatic embryogenesis from aerial stem explants of ginger (Zingiber officinale Rosc.) por Lincy, Adinkudik K.,Remashree, Azhimala B.,Sasikumar, Bhaskaran | 9 Nutlet morphology and its taxonomic utility in Salvia (Lamiaceae: Mentheae) from Turkey por Ozkan, Mustafa,Aktas, Kamuran,Ozdemir, Canan,Guerin, Greg |
5 Unusual thylakoid structures appearing during degradation of the photosynthetic apparatus in chloroplasts por Wrischer, Mercedes; Rudjer Boskovic Institute,Prebeg, Tatjana; Rudjer Boskovic Institute,Magnus, Volker; Rudjer Boskovic Institute,Ljubesic, Nikola; Rudjer Boskovic Institute | 10 Russian wheat aphid causes greater reduction in phloem transport capacity of barley leaves than bird cherry-oat aphid. por Saheed, Sefiu Adekilekun; Department of Botany, Rhodes University, Grahamstown 6140, South Africa; School of Life Sciences, Södertörn University College, S-141 89 Huddinge, Sweden; Department of Botany, Faculty of Science, Obafemi Awolowo University, Ile-Ife 22005, Nigeria,Jonsson, Lisbeth M.V.; School of Life Sciences, Södertörn University College, S-141 89 Huddinge, Sweden,Botha, Christiaan E.J.; Department of Botany, Rhodes University, Grahamstown 6140, South Africa |