Home – Home – Jornals – Contemporary Problems of Ecology 2024 number 2

Sakhalin meadow communities are an important component of the vegetation cover of the Far East. The use of phytoindication scales is a possible way to understand the ecology of meadow vegetation. The material of the study was 113 geobotanical descriptions of meadow communities in the southern part of Sakhalin. A similarity matrix of descriptions was calculated by using the quantitative Bray - Curtis index for cluster analysis with the subsequent classification of meadow communities. For the first time, an ecological assessment of meadow vegetation in the southern part of Sakhalin Island was carried out using the scales of I. A. Tsatsenkin and D. N. Tsyganov. As a result of the work, the following meadow communities were identified: Phalaroides arundinacea meadows, seeded forb-grass meadows, coastal forb-grass meadows, floodplain-coastal tall grass meadows, Leymus mollis meadows, Aquilinum pteridium meadows, an Artemisia meadow. It was determined that the meadow communities of the southern Sakhalin are classified as moderately humid with the dominance of eumesophytes and xeromesophytes. Soils, even on the sea coasts, are non-saline, quite rich in nutrients and, at the same time, poor or sufficiently supplied with nitrogen. According to the calculations, the soils under the meadows are acidic and slightly acidic. The climate was defined as subboreal, with a surplus of precipitation. As for the agricultural use of meadows as pastures and hayfields, it has almost no effect on the composition of phytocenoses, however, low indicators on the scale of pasture digression may be a sign of violation of haymaking terms. The discovered feature of the Sakhalin meadow communities is that groups of meadows different in location and species composition, display very similar habitat conditions.