Although non-native earthworms are known to drastically change forest soils and understory plant communities, comparatively little is known about how the introduction of different earthworm groups may alter perennial plant functioning (i.e., physiological, morphological, and/or anatomical traits), or how these dynamics may vary between different earthworm groups. Our objective was to assess whether a recent replacement of European earthworms by Amynthas spp. (i.e., Asian “jumping worms”) in a Central Hardwoods forest of the Upper Midwest impacts patterns of water use in dominant overstory Acer saccharum Marshall (sugar maple). We found that (1) soil water content was often greater in Amynthas sites, (2) compared to those growing in sites with only European earthworms, A. saccharum growing with Amynthas had higher midday leaf water potential values (a measure of greater plant water status) early in 2017 but lower midday leaf water potential by the end of 2018, and (3) A. saccharum from Amynthas sites had fewer, but wider xylem conduits than trees from European sites, but this trend was not significant and was not associated with differences in stem hydraulic functioning between the two groups. Overall, these results suggest that Amynthas invasions may not impact the overstory of A. saccharum—dominated forests within the Upper Midwest, at least early during invasions of forests colonized by existing earthworms or during growing seasons with above-average precipitation. Future work should investigate the impacts of different earthworm groups on tree water and nutrient relations over longer periods of colonization and in different tree age classes.

尽管已知非worm会极大地改变森林土壤和林下植物群落，但对引入不同的groups类如何改变多年生植物功能（即生理，形态和/或解剖特征）的了解甚少，这些earth在不同的between类之间可能有所不同。我们的目的是评估最近是否被Amynthas spp取代了欧洲earth。中西部上层中央硬木森林中的亚洲“跳虫”（即亚洲“跳虫”）影响了占主导地位的楼上宏cer枫糖（枫糖）的用水模式。我们发现（1）Amynthas的土壤水分含量通常较高地点（2）与仅生长欧洲earth的地点相比，与Amynthas一起生长的糖曲霉在2017年初的中午叶水势值较高（衡量较高的植物水状况），但到最后时中午的叶水势较低2018年，和（3）A.甘蔗从Amynthas网站有较少，但更广泛的木质部导管比从欧洲网站的树木，但这种趋势并不显著，并没有用在干两组液压功能差异有关。总体而言，这些结果表明，Amynthas的入侵可能不会影响糖曲霉的故事。-中西部上空的森林为主，至少在入侵由现有earth所定居的森林期间或在降水量高于平均水平的生长期期间。未来的工作应该调查在较长的殖民时期和不同树龄类别中不同groups类对树水和养分关系的影响。