The vegetation of the Canadian Prairie Provinces III. Aquatic and semi-aquatic vegetation, Part 3 Aquatic plant communities

1986 ◽  
Vol 14 (1) ◽  
pp. 19-54 ◽  
Author(s):  
J. Looman
2020 ◽  
Vol 1 ◽  
pp. 53-75
Author(s):  
Dimitrios Zervas ◽  
Ioannis Tsiripidis ◽  
Erwin Bergmeier ◽  
Vasiliki Tsiaoussi

Aims: This study aims to contribute to the knowledge of European freshwater lake ecosystems with updated and new information on aquatic plant communities, by conducting national-scale phytosociological research of freshwater lake vegetation in Greece. Moreover, it investigates the relationship between aquatic plant communities and lake environmental parameters, including eutrophication levels and hydro-morphological conditions. Study area: Lakes in Greece, SE Europe. Methods: 5,690 phytosociological relevés of aquatic vegetation were sampled in 18 freshwater lake ecosystems during 2013–2016. The relevés were subjected to hierarchical cluster and indicator species analyses in order to identify associations and communities of aquatic vegetation, as well as to describe their syntaxonomy. Multiple regression analysis was applied to investigate the relationship between vegetation syntaxa and environmental parameters of lakes, i.e. physico-chemical parameters and water level fluctuation. Results: Ninety-nine plant taxa belonging to 30 different families were recorded. Forty-six vegetation types were identified and described by their ecological characteristics, diagnostic taxa and syntaxonomical status. Thirteen vegetation types, the largest number belonging to the vegetation class Charetea, are considered to be new records for Greece. The distribution of the vegetation types recorded in the 18 freshwater lakes was found to depend on environmental parameters and levels of eutrophication. Conclusions: An updated aquatic vegetation inventory was produced for Greek lakes, and primary results showed that the presence/absence of aquatic plant communities and the community composition in freshwater lakes can be utilized to assess the pressure of eutrophication on lake ecosystems. Taxonomic reference: Euro+Med (2006–). Abbreviations: MNT = Mean number of taxa; WFD = Water Framework Directive.


2012 ◽  
pp. 106-132 ◽  
Author(s):  
V. V. Chepinoga ◽  
S. A. Rosbakh

Communities of free floating plants in the reservoirs of Baikal Siberia (incl. Irkutsk Region, Republic of Burya­tia, Zabaikalsky Territory) are described. ­Using the Braun-Blanquet approach the classification of aquatic plant communities is developed. Eight associations have been identified, belonging to three alliances and three orders. The order Ceratophyllo–Hydrocharitetalia morsus-ranae Chepinoga et Rosbakh ord. nov. and the association Utricularietum macrorhizae Chepinoga et Rosbakh ass. nov. are described as new ones. The name of the association Lemno–Spirodeletum polyrhizae Koch 1954 is typified. Numerical methods for revealing and testing diagnostic, constant and dominant species have been applied. For each association the main synonyms as well as information about structure, ecology, and general and regional distributions are provided. Some features of classification of aquatic vegetation are discussed.


2011 ◽  
pp. 55-70 ◽  
Author(s):  
Ya. M. Golovanov ◽  
S. S. Petrov ◽  
L. M. Abramova

The results of a syntaxonomical study (by Braun-Blanquet method) of higher aquatic plant communities of Salavat town (Bashkortostan Republic), the third city in the republic with population approximately of 150 000 people, are presented. The diversity of communities of aquatic vegetation has been classified. They belong to 2 classes (Lemnetea, Potametea), 3 orders (Lemnetalia, Hydrocharitetalia and Potametalia), 4 alliances (Lemnion minoris, Hydrocharition morsus-ranae, Potamion pectinati and Nymphaeion albae), 14 associations and 10 variants. An expansion of the communities belong to associations Elodeetum canadensis, Najadetum marinae in the Belaya river was noticed. It indicates the intensification of sewage disposal to the river.


2019 ◽  
pp. 91-94
Author(s):  
T. M. Lysenko ◽  
V. Yu. Neshatayeva ◽  
Z. V. Dutova

The International conference “Flora and conservation in the Caucasus: history and current state of knowledge” dedicated to the 130-year anniversary of the Perkalsky Arboretum took place at 22–25 of May 2019 in Pyatigorsk (Stavropol Territory) on the base of the Pyatigorsk Museum of local lore and natural history. The participants were from 11 cities of Russia and 7 Republics of the Caucasus and represented 14 institutions. Proceedings of the conference were published by the beginning of the meeting the book of abstracts includes 49 papers on the study of vascular plants, bryophytes, lichens and fungi, plant communities, as well as the protection of rare and endangered species, unique plant communities, and ecological problems in the Caucasus. The following geobotanical topics were highlighted in 13 papers: forest communities (3 reports), meadow and steppe vegetation (2), xeric open forests (2), communities of ecotone areas (1), structure of populations of rare plant species (3), as well as the history and current status of nature protected areas (2). The great emphasis has been focused on the study of floristic composition and plant populations. Thus, the conference showed that very few studies от vegetation are currently carried out in the Caucasus, and a lot of districts are not affected by the research. The greatest attention is paid to forest vegetation while meadow, steppe, alpine heath and xerophytic communities are studied rather poorly. Besides, there are “white spots” — mire, floodplain and aquatic vegetation. In nowadays, when the anthropogenic impact on the plant cover of the Caucasus is intensively increasing, it is especially important to study natural undisturbed communities preserved in protected natural areas. Another important issue is the conservation of the unique vegetation cover of the whole Caucasus. Thus, the study of vegetation of this region opens a wide field for researchers using various methods of modern plant science.


2009 ◽  
Vol 149 (6-7) ◽  
pp. 1022-1031 ◽  
Author(s):  
Budong Qian ◽  
Reinder De Jong ◽  
Richard Warren ◽  
Aston Chipanshi ◽  
Harvey Hill

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