Aufsatz in einer Fachzeitschrift
Halophytic plant communities in the Northern Caspian lowlands: 1, annual halophytic communities
Details zur Publikation
Autor(inn)en: | Freitag, H.; Golub, V.; Lomonosova, M. |
Publikationsjahr: | 2001 |
Zeitschrift: | Phytocoenologia |
Seitenbereich: | 63-108 |
Jahrgang/Band : | 31 |
ISSN: | 0340-269X |
eISSN: | 2363-7153 |
Zusammenfassung, Abstract
During an expedition in 1996, the halophytic plant communities of the northern Caspian lowlands between the rivers Volga and Ural were investigated phytosociologically. In this paper, the physical and climatological conditions of the steppe and semidesert area are outlined, the methods and specific problems described, and the results concerning the annual halophytic communities, mostly restricted to sites with long inundation and varying degrees of salinity, are discussed. 12 communities with several subunits are documented and described structurally and ecologically: 1 - Salicornietum prostratae; 2 - Salicornio perennantis-Suaedetum salsae (new); 3 - Suaede rum eltonicae (new); 4 - Suaeda acuminata-Salicornia perennans comm. (new); 5 - Suaedetum salso-prostratae (new); 6 - Salsoletum acutifoliae (new); 7 - Bassia hyssopifolia-Suaeda salsa comm. (new); 8 - Suaedetum corniculatae; 9 - Puccinellio giganteae-Camphorosmetum songoricae (new); and three Suaeda acuminata communities (new). In a syntaxonomical section, the classification of the respective higher categories of Eurasian salt-marshes is critically discussed. The communities 1-7 are grouped with the Salicornion prostratae and the associations 8 and 9 with the new alliance Camphorosmo-Suaedion corniculatae, all belonging to the Thero-Salicornietalia. The three last communities, from somewhat drier sites, belong to the syntaxa Salicornietea fruticosae, Halostachyetalia and Climacoptero-Suaedion. In them, the absence of perennials is caused by disturbance. Therefore they are considered to represent derivative communities.
During an expedition in 1996, the halophytic plant communities of the northern Caspian lowlands between the rivers Volga and Ural were investigated phytosociologically. In this paper, the physical and climatological conditions of the steppe and semidesert area are outlined, the methods and specific problems described, and the results concerning the annual halophytic communities, mostly restricted to sites with long inundation and varying degrees of salinity, are discussed. 12 communities with several subunits are documented and described structurally and ecologically: 1 - Salicornietum prostratae; 2 - Salicornio perennantis-Suaedetum salsae (new); 3 - Suaede rum eltonicae (new); 4 - Suaeda acuminata-Salicornia perennans comm. (new); 5 - Suaedetum salso-prostratae (new); 6 - Salsoletum acutifoliae (new); 7 - Bassia hyssopifolia-Suaeda salsa comm. (new); 8 - Suaedetum corniculatae; 9 - Puccinellio giganteae-Camphorosmetum songoricae (new); and three Suaeda acuminata communities (new). In a syntaxonomical section, the classification of the respective higher categories of Eurasian salt-marshes is critically discussed. The communities 1-7 are grouped with the Salicornion prostratae and the associations 8 and 9 with the new alliance Camphorosmo-Suaedion corniculatae, all belonging to the Thero-Salicornietalia. The three last communities, from somewhat drier sites, belong to the syntaxa Salicornietea fruticosae, Halostachyetalia and Climacoptero-Suaedion. In them, the absence of perennials is caused by disturbance. Therefore they are considered to represent derivative communities.
