Population characteristics of Silaum silaus (L.) Schinz & Thell. (Apiaceae) in Mordovia, a highly threatened plant species at the northern limit of its range

Main Article Content

Anatoliy A. Khapugin
http://orcid.org/0000-0002-6059-2779

Abstract

Knowledge on status of peripheral plant populations is important for understanding of species’ adaptation and evolution within their ranges.  There is a lack of data on the status of Silaum silaus (Apiaceae) populations at the periphery of its native range.  One of the most northern native S. silaus populations is situated in the Republic of Mordovia (Central Russia).  This species is considered as Critically Endangered in the region.  Population-based studies of S. silaus have been carried out. Reproductive biology, morphometric parameters of individuals, accompanying flora, seed characteristics (mass, germination rate) were investigated.  Results showed that at the northern limit of the range S. silaus grows in floodplain meadow community previously disturbed by livestock grazing. The area occupied by the population, however, has increased more than 12 fold over the last 15 years. Increasing fruit production together with decreasing fruit mass was established for the studied population compared to populations in the central part of its native range.  In addition, germination rate was very low (2.3–16.7 % depending on edaphic conditions).  Additional studies of S. silaus populations are needed in saline steppes of the closely located territories where it occurs as one of the dominant species in the plant community.

Article Details

How to Cite
[1]
Khapugin, A.A. 2018. Population characteristics of Silaum silaus (L.) Schinz & Thell. (Apiaceae) in Mordovia, a highly threatened plant species at the northern limit of its range. Journal of Threatened Taxa. 10, 1 (Jan. 2018), 11147–11155. DOI:https://doi.org/10.11609/jott.3476.10.1.11147-11155.
Section
Communications
Author Biography

Anatoliy A. Khapugin, Joint Directorate of the Mordovia State Nature Reserve and National Park “Smolny”, 430011, Saransk, Republic of Mordovia, Russia

To date PhD Anatoliy A. Khapugin works in the Joint Directorate of the Mordovia State Nature Reserve and National Park “Smolny†as a Senior Researcher. Additionally, he is a Managing Editor of the journal “Nature Conservation Researchâ€. Main scientific activities are related to flora inventory, biology and ecology of plant populations, alien species, rare and endangered species, pyrogenic successions, ecosystem ecology, environmental factors.


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