Habitat preferences of orchids in the Republic of Mordovia (European Russia): insights from (un)published floristic data

WULFENIA(2022)

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摘要
Orchidaceae are considered one of the most diverse and threatened plant families in the world. Because of the high conservation value of orchids around the world, it is highly relevant to estimate their habitat preferences and environmental factors that affect their distribution range and abundance. This paper presents the bibliographic survey (2002-2021) of published and unpublished data on the floras aassociated with orchid species in the Republic of Mordovia (European Russia). The study was aimed to estimate habitat preferences of orchids in this region based on associated flora composition. We have conducted the bibliographic survey to find any information on the composition of floras associated with orchids in the Republic of Mordovia. In addition, we have included our personal still unpublished data. Based on the floristic lists, we have evaluated the environmental conditions of orchid habitats using phytoindication methods (Tsyganov scale). We have distinguished four habitat groups of orchids, namely bog, meadow-mire, coniferous forest and mixed forest. The environmental conditions of sites inhabited by orchids of all these groups differed significantly (p < 0.05). This result highlights that various orchid species with close environmental condition preferences can be found and have to be protected at the same sites (e.g. so-called `orchid glades'). In addition, we have found that for many orchids, even the most common ones, there are no data on the associated floras. This makes it difficult to understand their environmental preferences and, consequently, the search of their localities in conditions of the highly pronounced floristic mosaics in the Republic of Mordovia. We propose the wide researching and publishing of data on plants (incl. orchids) associated with floras in the Republic of Mordovia and other regions for a better understanding of their habitat preferences.
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关键词
flora, bibliographic survey, Orchidaceae, plant distribution, threatened plants, Tsyganov scale
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