State of orchid populations in wetlands of the Sikhote-Alin Nature Reserve

Coenopopulations of Habenaria linearifolia, Platanthera hologlottis, Spiranthes sinensis, Pogonia japonica were studied in 2018-2023 in wetlands of the Sikhote-Alin Nature Reserve. These orchid coenopopulations are currently in a stable state. The indices of their spatial and ontogenetic structure correspond to the life form and also depend on the phytocenotic environment. Spiranthes sinensis is the most anthropotolerant species and reacts positively to minor anthropogenic and zoogenic disturbances. The population size of Habenaria linearifolia and Platanthera hologlottis and their density are inversely proportional to the abundance of turf-forming and rhizome Carex and Poaceae in swamp meadow. Pogonia japonica like the most vegetatively mobile species can form quite dense and numerous populations in sphagnum-sedge marshes. Provided that coastal meadows and their hydrological regime are preserved, as well as minor zoogenic and anthropogenic disturbances that create a mosaic of phytocenoses, the prognosis for the existence of coenopopulations of these orchid species is favorable.