Some rare damselflies and dragonflies (Odonata: Zygoptera and Anisoptera) in Ukraine: new records, notes on distribution, and habitat preferences

Martynov, Alexander V.

doi:10.11609/jott.5831.12.10.16279-16294

Cited by 1 publication

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“…In Western and Southern Europe its populations have severely declined in recent decades and the species has become extinct in Belgium, Luxembourg, and Slovakia, while in other countries, like France, Romania, and the Czech Republic, surviving populations are highly endangered (Bernard and Kalkman 2015). At the same time, in Central and Eastern Europe (Poland, Belarus, Ukraine and Lithuania), the species is widespread and locally abundant (Švitra and Gliwa 2008;Bernard and Kalkman 2015;Martynov 2020). In Italy, N. speciosa was observed for the first time in 1970 (Balestrazzi and Bucciarelli 1971;Ravizza 1973) at two sites in Lombardy (North-Western Italy) and, later, in a few sites in Friuli Venezia Giulia, North-Eastern Italy (Pecile 1981;Pecile 1991).…”

Section: Introductionmentioning

confidence: 99%

Microhabitat Selection and Population Density of Nehalennia Speciosa Charpentier, 1840 (Odonata: Coenagrionidae) in a Peripheral Microrefugium

et al. 2021

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Peripheral populations of boreal tyrphophilic animals and plants often occupy relict Alpine peatlands, which act as microrefugia. Ecological conditions within local peatlands can lead to uncommon adaptations, highly valuable for the long-term conservation of species and habitats. The pigmy damselfly (Nehalennia speciosa) is an endangered Odonata distributed in Central and Eastern Europe with peripheral populations in the Alps. We investigated the microscale species-habitat association and the conservation status of one of these populations in a relict raised bog. We applied dynamic N-mixture models to assess population ecology and density, while disentangling predictors’ effect on ecological and observation process. We counted N. speciosa individuals in spring 2018 along with vegetation, water, soil and weather conditions during surveys. Final model resulted reliable according to performance measures. Spatial variation in N. speciosa abundance was driven by vegetation type, with a strong selection for flooded hollows where C. rostrata, R. alba and S. palustris vegetation occupy acidic and oligotrophic shallow pools. Population density showed a peak in the first decade of June and increased with accumulation of superficial water. Detection probability was generally low and decreased further when wind blew. The reduced ecological plasticity of the species imperil the species to habitat and climate changes, which will be particularly threatening for its peripheral Alpine populations in the near future, causing water imbalance and rapid vegetation turnover within the peatlands’ fragile microhabitat. The studied peat bog could thus be retained a key future microrefugium for the long-term conservation of tyrphopilous wildlife and habitats.

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Section: Introductionmentioning

confidence: 99%