TITLE:
The Ontogenesis and Ontogenetic Structure of Lagochilus proskorjakovii Ikram (Lamiaceae) Coenopopulations in Nuratau Mountain Range (Uzbekistan)
AUTHORS:
A. K. Akhmedov, H. F. Shomurodov, Z. B. Nomozova
KEYWORDS:
Demographic Characteristics, Ontogenetic Spectrum, Maturing, Mature, Plant Community, Coenopopulation Types
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.7 No.6,
April
27,
2016
ABSTRACT: Lagochilus proskorjakovii Ikram is a strict endemic
in Nuratau ridge (north-western spurs of the mountain range of the Pamir-Alai).
It grows as a part of Amygdalus bucharica and Perovskia scrophulariifolia formation,
where the total projective cover of grass does not exceed 20%. In natural conditions
growth, ontogeny of L. proskorjakovii is simple and complete. The duration of ontogenesis in the condition of Nuratau
is no more than 22 - 23 years. Studied coenopopulations are normal, but are not
complete. Coenopopulation self-maintenance is carried out by the seed of renewal.
The characteristic spectrum of coenopopulation centered, with a peak in the middle-generative
individuals. In most cases, specific developmental spectrum of coenopopulation coincides
with the characteristic ones. The absence or small proportion of the young fraction
in surveyed of coenopopulation is related to the elimination of young fragile individuals.
According to the classification of “delta-omega”, the most of coenopopulations are
maturing which confirms the positive state of coenopopulation demography. Studied
the ontogeny and structure of adult endemic Nuratau established that the species
belongs to caudexum shrubs, perennial that forms the axis of the short multicipital
caudex. Buds renewal is at a height of 2 - 3 cm above the substrate. Investigated
coenopopulations L. proskorjakovii are
successiveness conditions. In addition to the Artemisia juncea + Perovskia scrophulariifolia + Ferula ovina + Stipa hohenackeriana community 1st coenopopulation (CP) mature; the 2nd CP is mature which was a part of
the Amygdalus bucharica + Perovskia scrophulariifolia + Prangos pobularia + Bromus scoparius community; 3rd CP is maturing being a part of Lonicera nummulariifolia + Perovskia scrophulariifolia + Hypericum scabrum + Bromus danthoniae community and the 4th CP is mature which occurred in Amygdalus bucharica + Ferula varia + Acroptilon repens + Taeniatherum
crinitum plant community.