Does decline and recovery process affect clonal and genetic diversity of a coastal plant population?

IF 2.8 3区 环境科学与生态学 Q2 ECOLOGY Restoration Ecology Pub Date : 2024-09-17 DOI:10.1111/rec.14283
Yoshihiro Tsunamoto, Yoko Nishikawa, Takashi Shimamura, Yoshihisa Suyama, Ayumi Matsuo
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Abstract

The evaluation of genetic diversity is important for the conservation of species. However, changes in genetic diversity during conservation are complex processes that depend on the characteristics of the species and environment. To evaluate the changes in genetic diversity from decline to recovery, we surveyed the coastal herb Calystegia soldanella in areas with varying degrees of non‐coastal plant invasion. First, to evaluate genetic diversity before the conservation measures, the spatial clonal structure of adults was investigated in a population invaded by non‐coastal plants. Second, to evaluate genetic diversity after the conservation measures, the regenerated individuals were investigated in the restoration plot. Moreover, to predict future genetic diversity without conservation measures, the effects of non‐coastal plant invasion on the production and genetic diversity of seeds were investigated using individuals from areas with various levels of non‐coastal plant invasion. In the adult population, 16 genets were identified in an 80 m × 4 m area. The maximum genet size was 30.3 m, suggesting the importance of clonal reproduction for population maintenance. In the restoration plots comprising 10 m × 10 m × 3 replicates, many seedlings (1.14 ramets/m2) emerged, resulting in high clonal diversity compared to that of the adult population. Therefore, the biomass and genetic diversity were rapidly restored at the beginning of the conservation practice. Non‐coastal plant invasion did not affect the genetic diversity of the seeds. However, it significantly reduced seed production. This suggests that non‐coastal plant invasion reduces sexual reproduction, resulting in the long‐term loss of genetic diversity.
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衰退和恢复过程是否会影响沿海植物种群的克隆和遗传多样性?
遗传多样性评估对于物种保护非常重要。然而,保护过程中遗传多样性的变化是一个复杂的过程,取决于物种和环境的特征。为了评估遗传多样性从衰退到恢复的变化,我们在非沿海植物入侵程度不同的地区调查了沿海草本植物 Calystegia soldanella。首先,为了评估采取保护措施之前的遗传多样性,我们调查了受非沿海植物入侵的种群中成虫的空间克隆结构。其次,为评估保护措施后的遗传多样性,对恢复地块中的再生个体进行了调查。此外,为了预测在未采取保护措施的情况下未来的遗传多样性,研究人员利用来自不同程度的非沿海植物入侵地区的个体,调查了非沿海植物入侵对种子生产和遗传多样性的影响。在一个 80 米 × 4 米的区域内,成年种群中发现了 16 个基因组。最大基因体长为 30.3 米,这表明克隆繁殖对种群的维持非常重要。在 10 m × 10 m × 3 个重复的恢复地块中,出现了许多幼苗(1.14 株/m2),与成体种群相比,克隆多样性较高。因此,在保护实践开始时,生物量和遗传多样性得到了迅速恢复。非沿海植物入侵并未影响种子的遗传多样性。然而,它却大大降低了种子产量。这表明,非沿海植物入侵会减少有性生殖,导致遗传多样性的长期丧失。
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来源期刊
Restoration Ecology
Restoration Ecology 环境科学-生态学
CiteScore
6.50
自引率
15.60%
发文量
226
审稿时长
12-24 weeks
期刊介绍: Restoration Ecology fosters the exchange of ideas among the many disciplines involved with ecological restoration. Addressing global concerns and communicating them to the international research community and restoration practitioners, the journal is at the forefront of a vital new direction in science, ecology, and policy. Original papers describe experimental, observational, and theoretical studies on terrestrial, marine, and freshwater systems, and are considered without taxonomic bias. Contributions span the natural sciences, including ecological and biological aspects, as well as the restoration of soil, air and water when set in an ecological context; and the social sciences, including cultural, philosophical, political, educational, economic and historical aspects. Edited by a distinguished panel, the journal continues to be a major conduit for researchers to publish their findings in the fight to not only halt ecological damage, but also to ultimately reverse it.
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