The role of dominant prairie species ecotypes on plant diversity patterns of restored grasslands across a rainfall gradient in the US Great Plains

IF 2.6 3区环境科学与生态学 Q3 ECOLOGY Applied Vegetation Science Pub Date : 2023-04-07 DOI:10.1111/avsc.12725

Zhe Ren, Sara G. Baer, Loretta C. Johnson, Matthew B. Galliart, Laurel R. Wilson, David J. Gibson

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引用次数: 1

Abstract

Questions

A robust ecosystem requires a functionally heterogeneous community of organisms with ecological traits that permit broad resource partitioning. Understanding community diversity patterns can help investigate drivers of community assembly and assess restoration success. Do biodiversity patterns differ among grassland communities sown with different ecotypes of dominant species during restoration along a rainfall gradient in the tallgrass prairie of the central US Great Plains?

Location

Four field sites across a rainfall gradient within the North American Great Plains: Colby, Kansas (39°23′17.8″N, 101°04′57.4″W), Hays, Kansas (38°51′13.2″N, 99°19′08.6″W), Manhattan, Kansas (39°08′22.3″N, 96°38′23.3″W), and Carbondale, Illinois (IL, 37°41′47.0″N, 89°14′19.2″W).

Methods

We applied linear mixed models to assess the effect of dominant species ecotype, year, and location on grassland taxonomic, phylogenetic, and functional diversity.

Results

The non-local grass ecotype (compared to the local ecotype) promoted species richness. In contrast, the effect of the dominant species ecotype on phylogenetic or functional diversity was site-specific over the 10-year restoration. Richness decreased across the rainfall gradient from dry to moist sites, and the wettest site had the highest phylogenetic and functional diversity.

Conclusions

Our results suggest that abiotic filtering by rainfall is a key assembly mechanism that could predict grassland changes in biodiversity in the early restoration phases. Given the community response across the tallgrass prairie, restoration practitioners should consider the impact of regional sources of dominant species used in restoration when biodiversity is a restoration goal. It is recommended for future grassland restoration to detect gaps and limitations in evolutionary and trait structure that will reveal which diversity components to evaluate.

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美国大平原降雨梯度下优势草原物种生态型对恢复草原植物多样性模式的作用

一个健全的生态系统需要一个功能各异的生物群落，这些生物群落具有允许广泛资源分配的生态特征。了解群落多样性模式有助于调查群落聚集的驱动因素并评估恢复成功。在美国中部大平原高草草原沿降雨梯度恢复过程中，不同生态类型优势物种播种的草地群落的生物多样性模式是否不同?横跨北美大平原降雨梯度的四个站点:堪萨斯州科尔比(39°23′17.8″N, 101°04′57.4″W)，堪萨斯州海斯(38°51′13.2″N, 99°19′08.6″W)，堪萨斯州曼哈顿(39°08′22.3″N, 96°38′23.3″W)，伊利诺伊州卡本代尔(IL, 37°41′47.0″N, 89°14′19.2″W)。方法采用线性混合模型分析优势种生态型、年份和地点对草地分类、系统发育和功能多样性的影响。结果与本地生态型相比，非本地生态型促进了物种丰富度的提高。相比之下，优势种生态型对系统发育或功能多样性的影响在10年的恢复过程中具有站点特异性。丰富度在降雨梯度上由干地向湿地递减，最湿地的系统发育和功能多样性最高。结论降雨的非生物过滤是预测草地恢复早期生物多样性变化的关键组装机制。考虑到整个高草草原的群落反应，当生物多样性是恢复目标时，恢复从业者应该考虑恢复中使用的优势物种的区域来源的影响。建议在未来的草地恢复中发现进化和性状结构的差距和局限性，从而揭示应该评估哪些多样性成分。

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来源期刊

Applied Vegetation Science 环境科学-林学

CiteScore

6.00

自引率

10.70%

发文量

审稿时长

3 months

期刊介绍： Applied Vegetation Science focuses on community-level topics relevant to human interaction with vegetation, including global change, nature conservation, nature management, restoration of plant communities and of natural habitats, and the planning of semi-natural and urban landscapes. Vegetation survey, modelling and remote-sensing applications are welcome. Papers on vegetation science which do not fit to this scope (do not have an applied aspect and are not vegetation survey) should be directed to our associate journal, the Journal of Vegetation Science. Both journals publish papers on the ecology of a single species only if it plays a key role in structuring plant communities.