Assessment of the State of Trifolium Repens L. Cenopopulations in Arid Conditions in the Surkhandrarya Region (Uzbekistan)

IF 0.6 Q4 ECOLOGY

Arid Ecosystems Pub Date : 2025-09-02 DOI:10.1134/S2079096124700598

Sh. U. Saribaeva, A. Allamuratov, B. Mavlanov, B. Adilov

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Abstract

The morphological variability and plasticity of traits, age structure, abundance, and density of Trifolium repens L. were studied in arid conditions of the Surkhandarya region of the Republic of Uzbekistan. These studies were conducted on different phytocenoses under anthropogenic load. The species is characterized by low–medium plasticity and medium variability of the morphological traits. In undisturbed cenopopulations, high vitality (IVC = 0.87) and a large proportion of pregenerative individuals are observed. Increased anthropogenic impact leads to a decrease in vitality (IVC = 0.62). An ontogenetic structure with the left-sided (CP 1) and centered type (CP 2, 3, 4) is observed. The characteristic ontogenetic spectrum of Trifolium repens is left-sided, with an absolute maximum in one of the pregenerative groups. Cenopopulation 1 coincides with the characteristic type of the species studied; it has no anthropogenic load and a high projective cover (90%), and the density of individuals is 5.3 ind./m². Cenopopulations 2–4 do not coincide with the characteristic one. Their young fractions die off, and middle-aged individuals accumulate. The reasons for the reduction in the number of individuals are the negative impact of the anthropogenic factor and climate change.

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乌兹别克斯坦苏尔干德拉里亚地区干旱条件下三叶草种群状况评价

研究了乌兹别克斯坦共和国苏尔干达里亚地区干旱条件下三叶草（Trifolium repens L.）性状、年龄结构、丰度和密度的形态变异和可塑性。这些研究是在人为负荷下对不同植物甾体进行的。该物种具有中低可塑性和中等变异的形态特征。在未受干扰的种群中，种群活力高（IVC = 0.87），前生殖个体比例大。人为影响增加导致活力下降（IVC = 0.62）。观察到左侧（CP 1）和中心型（CP 2、3、4）的个体发生结构。三叶草个体发生谱的特征是左侧的，在一个前生殖群中有绝对最大值。种群1与所研究物种的特征类型一致；无人为负荷，投影盖度高（90%），个体密度为5.3个/m2。2-4人口与特征人口不一致。年轻的部分逐渐消失，中年个体逐渐积累。个体数量减少的原因是人为因素和气候变化的负面影响。

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来源期刊

Arid Ecosystems ECOLOGY-

CiteScore

1.50

自引率

25.00%

发文量

期刊介绍： Arid Ecosystems publishes original scientific research articles on desert and semidesert ecosystems and environment:systematic studies of arid territories: climate changes, water supply of territories, soils as ecological factors of ecosystems state and dynamics in different scales (from local to global);systematic studies of arid ecosystems: composition and structure, diversity, ecology; paleohistory; dynamics under anthropogenic and natural factors impact, including climate changes; studying of bioresources and biodiversity, and development of the mapping methods;arid ecosystems protection: development of the theory and methods of degradation prevention and monitoring; desert ecosystems rehabilitation;problems of desertification: theoretical and practical issues of modern aridization processes under anthropogenic impact and global climate changes.