Fine-scale diversity models reveal impacts of invasive Gaillardia pulchella on regenerating vegetation in a sand dune grassland

IF 2.7 2区 生物学 Q2 PLANT SCIENCES
Zsófia Orbán, László Bakacsy
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引用次数: 0

Abstract

Premise

Gaillardia pulchella is native to North America but invasive in Central Europe, including Hungary, and can significantly alter vegetation dynamics, thereby affecting biodiversity and community structure. This study explored the fine-scale effects of G. pulchella invasion on the regeneration of old sandy fields in open dune grasslands in Kiskunság National Park, Hungary, within the Pannonian biogeographic region. The impact of invasion on vegetation association structures was estimated by investigating the early stages of the effects of invasion on plant communities.

Methods

Diversity models were used to assess compositional diversity (CD) and the number of realized species combinations (NRC) in invaded versus noninvaded stands. Plexus graphs were used to analyze the spatial relationships between G. pulchella and neighboring species at a fine scale (5 × 15 cm).

Results

Invasion-free stands had higher species richness and greater structural complexity at fine spatial scales, as indicated by CD and NRC functions. Significantly higher CD values in invasion-free stands compared to invaded stands emphasize the negative impact of G. pulchella on coexistence among native species. Plexus graphs illustrated both negative and positive associations between G. pulchella and native species, suggesting a nuanced competitive role in invaded stands.

Conclusions

Gaillardia pulchella invasion, though not strongly characterized, has negatively impacted vegetation structure at fine spatial scales, which may potentially intensify over time. The study underscores the importance of early detection and long-term monitoring for a comprehensive understanding of invasive processes and their effects on plant communities in sandy habitats.

精细尺度的多样性模型揭示了入侵的普氏盖拉菌对沙丘草地植被再生的影响。
前提:盖拉迪亚(Gaillardia pulchella)原产于北美,但入侵中欧,包括匈牙利,可以显著改变植被动态,从而影响生物多样性和群落结构。本研究探讨了匈牙利Kiskunság国家公园潘诺尼亚生物地理区开放沙丘草地上,G. pulchella入侵对旧沙场更新的精细尺度效应。通过调查入侵对植物群落影响的早期阶段,估计入侵对植被关联结构的影响。方法:采用多样性模型对入侵与非入侵林分的组成多样性(CD)和实现物种组合数量(NRC)进行评价。在5 × 15 cm的精细尺度上,利用丛图分析了白头草与邻近物种的空间关系。结果:无入侵林分在精细空间尺度上具有较高的物种丰富度和结构复杂性。无入侵林分CD值显著高于入侵林分CD值,这说明了白毛菌对本地物种共存的负面影响。丛状图显示了白杨与本地物种之间的负相关和正相关,表明在入侵林分中存在微妙的竞争作用。结论:pulchella Gaillardia的入侵虽然特征不明显,但在精细的空间尺度上对植被结构产生了负面影响,并可能随着时间的推移而加剧。该研究强调了早期发现和长期监测对于全面了解入侵过程及其对沙质生境植物群落的影响的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
American Journal of Botany
American Journal of Botany 生物-植物科学
CiteScore
4.90
自引率
6.70%
发文量
171
审稿时长
3 months
期刊介绍: The American Journal of Botany (AJB), the flagship journal of the Botanical Society of America (BSA), publishes peer-reviewed, innovative, significant research of interest to a wide audience of plant scientists in all areas of plant biology (structure, function, development, diversity, genetics, evolution, systematics), all levels of organization (molecular to ecosystem), and all plant groups and allied organisms (cyanobacteria, algae, fungi, and lichens). AJB requires authors to frame their research questions and discuss their results in terms of major questions of plant biology. In general, papers that are too narrowly focused, purely descriptive, natural history, broad surveys, or that contain only preliminary data will not be considered.
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