Effect of salinization on the species composition and morphological features of soil algaeстатья
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Дата последнего поиска статьи во внешних источниках: 20 октября 2021 г.
Аннотация:The communities of soil algae in saltwort ecosystems of the Transural part of Bashkiria were studied. The impact of salinization on the soil alga Xanthonema exile (Klebs) Silva (section Xanthophyta) was specially investigated. Sodium chloride and sodium carbonate were applied as salinization agents in the following concentrations: NaCl—2 × 10−1; 3.5 × 10−1; 5 × 10−1; 7 × 10−1; 1, and 1.5 M/l (11.7, 20.5, 29.3, 41.0, 58.5, and 87.8 mg/l); Na2CO3—5 × 10−4, 1 × 10−3, 5 × 10−3, 1 × 10−2, and 5 × 10−2, M/l (0.053, 0.106, 0.53, 1.06, and 5.3 mg/l). Algae in the natural salt-affected soils of the studied region were represented by 83 species belonging to 5 divisions, 11 orders, 23 families, and 24 genera. The genera Phormidium, Navicula, and Oscillatoria were represented by the maximum numbers of species. The ecological groups of soil algae relative to the soil salinization were distinguished. The study of the impact of salinization with NaCl and Na2CO3 on X. exile demonstrated a reliable change in the size of algal cells. Upon the high concentration of salts, changes in the size of the algal cells were also accompanied by their morphological disturbances. Sodium carbonate proved to be more toxic than sodium chloride. The minimal salt concentrations upon which changes in the cell morphology took place were 5 × 10−2 M/l Na2CO3 (1.06 mg/l) and 1 M/l NaCl (58.5 mg/l).