Genotypic diversity of a dominant species <i>Leymus chinensis</i> inhibited ecological function of species diversity in the Inner Mongolia Steppe

Yukun, 王宇坤 Wang; Xinfeng, 丁新峰 Ding; Xiaoping, 王小平 Wang; Man, 吴曼 Wu; Shaobo, 高韶勃 Gao; Xue, 杨雪 Yang; Nianxi, 赵念席 Zhao; Yubao, 高玉葆 Gao

doi:10.5846/stxb201711021964

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous studies have investigated the relationship between plant species and genetic diversity, yielding inconsistent results. This relationship may take different forms: it could be parallel [4,53], where the genetic diversity of dominant species influences community species diversity [54], or it could be positive, where community species diversity affects the genetic diversity of dominant species [6]. In our study, species diversity at the U, NU and community levels was positively correlated with genetic diversity.…”

Section: Relationship Between Species and Genetic Diversitymentioning

confidence: 57%

Plant Diversity Responses of Ulmus pumila L. Communities to Grazing Management in Hunshandak Sandy Land, China

Huang,

He,

Zhao

et al. 2023

Diversity

View full text Add to dashboard Cite

Biodiversity is sensitive to climate change and human activity. Grazing management practices have a profound impact on plant species–genetic diversity in grassland and woodland communities. In this study, we explored the responses of species and genetic diversity to grazing in Ulmus pumila L. communities in the Hunshandak Sandy Land, analyzed the relationship between species and genetic diversity, and revealed the effects of climate factors on them. We found that the dominant species were Spiraea trilobata, Caragana microphylla and Artemisia intramongolica in U. pumila communities. Plant species richness in the banned grazing (BG) and seasonal grazing (SG) communities was significantly higher than that in the delayed grazing (DG) community. Plant Simpson’s diversity index showed a downward trend with increasing grazing duration. There was no difference in allelic richness in nuclear DNA (nrDNA) of U (U. pumila) and chloroplast DNA (cpDNA) of NU (other dominant species besides U. pumila) among grazing management types. The expected heterozygosity of U in nrDNA and cpDNA was significantly affected by grazing management, and the trend was BG > SG > DG. The genetic diversity of U was lower than that of NU. The genetic diversity characteristics of U in cpDNA were lower than those in nrDNA. The analysis of molecular variance (AMOVA) showed that 98.08% of the variation in U and 95.25% of the variation in NU was attributed within populations and the differences within grazing management types were 13.35% in U and 24.08% in NU (p < 0.001). The species richness of communities was positively correlated with the genetic diversity of U, NU and all dominant species (U + NU) in communities. The nineteen climatic variables together explained 94.24% and 79.08% of the total variation in U and NU genetic and species diversity. The mean temperature of the warmest quarter and temperature seasonality were the main factors affecting genetic diversity (p = 0.046; 0.01), while the maximum temperature of the warmest month was the main factor affecting species diversity (p = 0.05).

show abstract

Section: Relationship Between Species and Genetic Diversitymentioning

confidence: 57%

Plant Diversity Responses of Ulmus pumila L. Communities to Grazing Management in Hunshandak Sandy Land, China

Huang,

He,

Zhao

et al. 2023

Diversity

View full text Add to dashboard Cite

show abstract

“…Except for the 4a tillers, 1a, 2a and 3a tillers decreased gradually as genotypic diversity increased. This is because, given the limited nutrient material and growing space, too high genotypic diversity increases competition among the L. chinensis population and limits the growth of the dominant genes in the population, when the negative effect of selection plays a major role in the increase of genotypic diversity [42,50,51]. Among the 4 and 8 levels of genotypic diversity, the population can grow and reproduce stably.…”

Section: Age Structure Of Budsmentioning

confidence: 99%

“…As genotypic diversity increases, population fitness, anti-interference ability and the success rate of population expansion increase [38][39][40]. It has shown that genotypic diversity could not only improve the performance of L. chinensis population, but also enhance their anti-interference capabilities [34,41,42]. However, the effect of genotypic diversity on the age structure of L. chinensis population is not undertaken.…”

Section: Introductionmentioning

confidence: 99%

Genotypic Diversity Affects Age Structure of Tiller and Rhizome of Leymus chinensis Population, But Not Age Structure of Bud

Zhou,

Xie,

Rong

et al. 2023

Phyton

View full text Add to dashboard Cite

The effect of genotypic diversity on the age structure and bud bank of the Leymus chinensis population has not yet been demonstrated. This experiment was designed to study the age structure of the tiller, rhizome, and bud of L. chinensis at genotypic diversity levels of 1, 2, 4, 8, and 12. A total of 64 communities were established in this experiment, following the principle of randomized block experimental design. The results indicated that genotypic diversity had a significant or obviously significant effect on the cumulative length of rhizomes of 2a and 4a, dry matter accumulation of rhizomes of 1a and 2a, tiller number of 1a, tiller productivity of 3a, but had no significant effect age structure of buds. As the levels of genotypic diversity increased, the proportion of the cumulative length of rhizomes with 4a decreased and then increased, and dry matter accumulation of rhizomes with 1a and 2a gradually increased while the number of tillers with 1a gradually decreased, when the gradient of genotypic diversity increased. At the 1, 2, 4, 8, and 12 genotype diversity levels, the number of tillers, the cumulative length of rhizomes, and dry matter accumulation in rhizomes and buds were all age structures of expanding type. However, tiller productivity was an expanding or stable age structure at levels of 1, 2, 4, 8 genotypic diversity, while it was a declining age structure at the 12 genotype diversity gradient. An appropriate genotypic diversity is conducive to maintaining the growth and stability of the age structure of L. chinensis population, but too high a gradient of genotypic diversity can have a negative impact on the population age structure. This study provided that an appropriate number of genotypic diversity contributes to the stability of the population.

show abstract

Influencing Factors of Plant Species Diversity: A Review

武¹

2021

IJE

View full text Add to dashboard Cite

Genotypic diversity of a dominant species Leymus chinensis inhibited ecological function of species diversity in the Inner Mongolia Steppe

Cited by 3 publications

References 0 publications

Plant Diversity Responses of Ulmus pumila L. Communities to Grazing Management in Hunshandak Sandy Land, China

Plant Diversity Responses of Ulmus pumila L. Communities to Grazing Management in Hunshandak Sandy Land, China

Genotypic Diversity Affects Age Structure of Tiller and Rhizome of Leymus chinensis Population, But Not Age Structure of Bud

Influencing Factors of Plant Species Diversity: A Review

Contact Info

Product

Resources

About