Ecology and structure of Goodyera repens (L.) R. Br. (Orchidaceae) coenopopulations in the Northern Urals
I. A. Kirillova, S. V. Degteva, Y. A. Dubrovskiy, A. B. Novakovskiy
Section: Population ecology
Data on ecology, phytocoenological preferences and population structure of the species
Goodyera repens
(L.)
R. Br. of Orchidacea family in the Northern Urals are considered. Investigations were carried out during 2000–2016
in the three protected areas: Pechoro-Ilychsky reserve, Un’insky complex sanctuary and Yugyd Va national park.
23 coenopopulations were studied. 72 releves with
G. repens
were used to study phytocoenotical preferences and eco
-
logical parameters of the species. The species has wide phytocoenotical range establishing various forest formations
and forest types – green moss, herb and sphagnum, being more often in the communities of association
Piceetum
myrtilloso-hylocomiosum
. The species establishes mainly ecotopes with medium humidity and weakly acid poor soils,
and refers to the semi-shadow group of plants according to Ellenberg’s scale. The studied coenopopulations are small
and full up to 500 individual shoots. Spatial structure of
G. repens
coenopopulations was determined by occurrence of
well-developed isolated clusters resulted from prevailing vegetative reproduction of the model species. In the Komi
Republic, such clusters ranging from 1 to 3–6 m
2
size consist of several tens or hundreds of individual plants with
an average density from 9 to 224 shoots per m
2
. All the coenopopulations under study were full and their ontogenetic
spectra were similar with the prevalence of immature or adult vegetative shoots. Average ontogenetic spectrum of all
the coenopopulations under study was as follows: juvenile shoots – 8.7%, immature – 39.8%, adult vegetative – 37.7%,
generative – 13.8%. It corresponds to the basic spectrum of the species that is the evidence of the stable population’s
state. We suggest that
G. repens
is well adapted to the Northern Urals where there are many suitable ecotopes in the
large arrays of intact forests.
Keywords: Goodyera repens (L.) R. Br., orchids, coenopopulation structure, the Northern Urals
Article published in number 3 for 2018 DOI: 10.25750/1995-4301-2018-3-062-068
ISSN 1995-4301
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