J Plant Ecol ›› 2020, Vol. 13 ›› Issue (2): 224-232.DOI: 10.1093/jpe/rtaa004

• Research Articles • Previous Articles     Next Articles

Genotypic diversity and genotype identity of resident species drive community composition

Věroslava Hadincová1, *, Hana Skálová1,2 and Zuzana Münzbergová1,2,3   

  1. 1Department of Population Ecology, Institute of Botany, Academy of Sciences of the Czech Republic, Czech Republic, 2 Department of Botany, Faculty of Science, Charles University, Czech Republic, 3 Department of Invasion Ecology, Institute of Botany, Academy of Sciences of the Czech Republic, Czech Republic

    *Corresponding author. E-mail: veroslava.hadincova@ibot.cas.cz
  • Received:2018-03-09 Revised:2020-01-11 Accepted:2020-01-31 Online:2020-02-04 Published:2020-04-01

Abstract:

Aims

Species-rich plant communities are more resistant to invasions. In the past decade it was demonstrated that genetic variation also has many ecological effects. In our study we aimed to test whether the patterns of response to the genetic diversity of a resident species differ between colonizing species of different growth forms and whether the response is affected by soil nutrients.

Methods

We established experimental stands of a common grass, Festuca rubra, harbouring three levels of genetic diversity (1, 6 or 18 clonal genotypes, referred to as genotypic diversity) under two soil nutrient levels. In the fourth year after the stands were established, we sowed a mixture of four colonizers into the stands: a stoloniferous legume (Trifolium repens), a broad-leaf tussock grass (Anthoxanthum odoratum), a large-rosette forb (Plantago lanceolata) and a small-rosette forb (Campanula rotundifolia). We observed species establishment and growth over 3 years. We tested whether colonization success depended on genotypic diversity, specific Festuca genotypes, soil nutrients and colonizer growth form.

Important Findings

The colonization success and biomass of the colonizers were significantly affected by the genotypic diversity and the genotype identity of the resident clonal grass. The response, however, differed between the colonizers. The strongest response to the genotypic diversity of the resident species was observed in the tussock grass with a growth form and architecture similar to the resident species. The large-rosette species responded in early stages of growth whereas the stoloniferous legume did not respond at all. The intraspecific genotypic diversity and genotype identity of the resident species play an important role in the assembly of plant communities.

Key words: clonal grass, biodiversity effects, colonization

摘要:

物种丰富的植物群落更能抵抗入侵。近十年来的研究表明,遗传变异具有很多生态效应。本研究旨在检验本地物种遗传多样性的响应模式在不同生长形式的定殖物种之间是否存在差异,以及这种响应是否受到土壤养分的影响。我们设立常见草种紫羊茅(Festuca rubra) 实验样地,在两种土壤养分水平下,设置3个遗传多样性水平(1、6或18个克隆基因型,表征基因型多样性)。在样地设立后第4年,将4种定殖者混合播种到样地中:匍匐性豆科植物白车轴草(Trifolium repens)、阔叶黄花茅(Anthoxanthum odoratum)、大莲座丛杂草长叶车前(Plantago lanceolata)和小莲座丛杂草兴安风铃草(Campanula rotundifolia)。我们观测三年来物种的建立和生长情况,检验定殖成功是否取决于基因型多样性、特定的羊茅属基因型、土壤养分或定殖者的生长形式。本地无性系牧草的基因型多样性和基因型同一性对其定殖成功和生物量有显著影响。然而,定殖物种的反应各异。本地物种对基因型多样性最大的响应是生长形式和结构与本地物种相似的草丛型禾草。大莲座丛植物在生长初期有响应,而匍匐性豆科植物则完全没有响应。种内遗传型多样性和本地物种的基因型同一性在植物群落聚合中起着重要作用。

关键词: 无性系牧草, 生物多样性效应, 定殖, 种间遗传多样性, 紫羊茅