Seed Quality of Larix sibirica Ledeb. Depending on the Distance between Forest Areas and Pollution Sources around Ulaanbaatar City of Mongolia

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UDС

630*651.72

DOI:

10.37482/0536-1036-2021-4-23-35

Abstract

Seed quality and seed germination are the major indicators determining the success of regeneration and structure in natural forest ecosystems. This study focuses on problems associated with seed quality and seed germination under air pollution impacts in the surrounding forest ecosystems of Ulaanbaatar city of Mongolia. The objectives were to test whether there was any negative effect of air pollutants on the site index, and to analyze the relationship between seed quality and distance from the city center (maximum pollution). The study was carried out in natural larch forests (Larix sibirica Ledeb.) growing in the vicinity of the capital of Mongolia. A total of eight 100×100 m (1 ha) sample plots were laid out using completely randomized sampling design along the main wind direction. Remoteness from the city center was 10, 15, 20 and 30 km both to the north and to the south. Results showed a high variation in stand mean height (p > 0.001) and diameter (p > 0.001) among selected forest areas. In general, all sampled forests belonged to bonitet / quality classes III, IV and V, which are considered as relatively poor growing conditions in terms of site index. Therefore, greater site index and seed quality were observed in the most distant locations from the city center, and contrary, the poorest seed quality was detected in locations close to the city center. This emphasizes that forests growing close to pollution sources exist with a potential risk of degradation, and their reproductive organs are more sensitive to the effects of pollutants.

Authors

Bayarsaikahan Udval¹, Candidate of Biology; ORCID: https://orcid.org/0000-0002-0021-9155
Sukhbaatar Gerelbaatar², Candidate of Biology, Assoc. Prof.; ORCID: https://orcid.org/0000-0002-9561-5256
Tserenbaljir Dashzeveg¹, Candidate of Agriculture; ORCID: https://orcid.org/0000-0001-7757-4879
Anatoly I. Lobanov³, Candidate of Biology; ResearcherID: ABB-8764-2020, ORCID: https://orcid.org/0000-0003-0505-8212
¹ e-mail: udvalb@mas.ac.mn
² e-mail: gerelbaatar@seas.num.edu.mn
³ e-mail: anatoly-lobanov@ksc.krasn.ru

Affiliation

¹Devision of Forest Resources and Protection, Mongolian Academy of Sciences, Baruun selbe 15-4, Chingeltei District, Ulaanbaatar, 15170, Mongolia
²National University of Mongolia, University str., 3, Sukhbaatar District, Ulaanbaatar, 14201, Mongolia
³Scientific Research Institute of Agrarian Problems of Khakassia, P.O. Box 709, Abakan, Republic of Khakassia, 655019, Russian Federation

Keywords

Siberian larch (Larix sibirica Ledeb.), seed quality, germination, site index, air pollution, Ulaanbaatar, Mongolia

Funding

This research was carried out within the framework of the project “Study of Forest Ecosystems in the Green zone of Ulaanbaatar city” and funded by the Foundation for Science and Technology. We also thank John Stanturf for the language improvement of this article.

For citation

Udval B., Gerelbaatar S., Dashzeveg Ts., Lobanov A.I. Seed Quality of Larix sibirica Ledeb. Depending on the Distance between Forest Areas and Pollution Sources around Ulaanbaatar City of Mongolia. Lesnoy Zhurnal [Russian Forestry Journal], 2021, no. 4, pp. 23–35. DOI: 10.37482/0536-1036-2021-4-23-35

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