Participation of Apomictic Cereals in the Composition of Steppe and Ecotone Phytocenoses in the North of the Lower Volga Region

IF 0.7 4区环境科学与生态学 Q4 ECOLOGY Contemporary Problems of Ecology Pub Date : 2024-06-04 DOI:10.1134/s1995425524700203

O. I. Yudakova, E. I. Kaybeleva, E. A. Nyushchenko, T. M. Lysenko, M. Yu. Voronin

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Abstract

A geobotanical analysis of 160 steppe and ecotone plant communities with the participation of cereals in the north of the Lower Volga region (within Saratov oblast) has been carried out. The species diversity of apomictic cereals is significantly inferior to the diversity of their amphimictic relatives in the flora of the region and in the studied phytocenoses (24 apomictic and 109 amphimictic species in the flora; 17 and 34 species in the phytocenoses, respectively). At the same time, the dominants of the studied communities are equally represented by both amphimictic (14 species) and apomictic cereals (9 species). It is established that cereals with an amphimictic mode of reproduction dominate in 64 phytocenoses and apomictic cereals dominate in 48 ones. The number of phytocenoses in which apomicts are codominants significantly exceeds the number of plant communities with amphimicts codominance (46 and 22, respectively). The studied plant communities are similar in species richness and evenness. The data indicate successful competition between apomictic cereals and amphimicts and their significant contribution to the composition of steppe and ecotone phytocenoses in the northern Lower Volga region.

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伏尔加河下游地区北部草原和生态区植物群落组成中的歉收谷类植物

摘要对下伏尔加河地区北部（萨拉托夫州境内）有谷物参与的 160 个草原和生态区植物群落进行了地理植物学分析。在该地区的植物区系和所研究的植物区系中，无花果谷物的物种多样性明显低于其两栖亲缘植物的物种多样性（植物区系中无花果谷物物种为 24 种，两栖谷物物种为 109 种；植物区系中无花果谷物物种为 17 种，两栖谷物物种为 34 种）。同时，所研究群落中的优势物种两栖谷物（14 种）和无两栖谷物（9 种）的数量相当。研究表明，在 64 个植物群落中，以两性生殖方式繁殖的谷物占优势，而在 48 个植物群落中，以无两性生殖方式繁殖的谷物占优势。在植物群落中，无花果是共显性的植物群落数量（分别为 46 个和 22 个）大大超过了双花果共显性的植物群落数量。所研究的植物群落在物种丰富度和均匀度方面都很相似。这些数据表明，有花谷物和两栖类植物之间的竞争非常成功，它们对伏尔加河下游地区北部草原和生态区植物群落的组成做出了重要贡献。

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来源期刊

Contemporary Problems of Ecology 环境科学-生态学

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Contemporary Problems of Ecology is a multidisciplinary periodical that publishes original works on the following subjects: theoretical and methodical issues of ecology, regional aspects of ecology, regional ecological disasters, structure and functioning of ecosystems, anthropogenic transformation of ecosystems. All basic aspects of modern ecology, including the most complicated interactions between living organisms and their environment, are presented. Some of the journal issues are dedicated to global changes in biological diversity at various levels of organization (populations, species, ecosystems) principles and methods of nature conservation.