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Temperature effects on forest understorey plants in hedgerows: a combined warming and transplant experiment
Annals of Botany ( IF 4.2 ) Pub Date : 2021-05-26 , DOI: 10.1093/aob/mcab064
Thomas Vanneste 1 , Sanne Van Den Berge 1 , Jörg Brunet 2 , Per-Ola Hedwall 2 , Kris Verheyen 1 , Pieter De Frenne 1
Affiliation  

Background and Aims Hedgerows have been shown to improve forest connectivity, leading to an increased probability of species tracking the shifting bioclimatic envelopes. However, it is still unknown how species in hedgerows respond to temperature changes, and whether effects differ compared with those in nearby forests. We aimed to elucidate how ongoing changes in the climate system will affect the efficiency of hedgerows in supporting forest plant persistence and migration in agricultural landscapes. Methods Here we report results from the first warming experiment in hedgerows. We combined reciprocal transplantation of plants along an 860-km latitudinal transect with experimental warming to assess the effects of temperature on vegetative growth and reproduction of two common forest herbs (Anemone nemorosa and Geum urbanum) in hedgerows versus forests. Key Results Both species grew taller and produced more biomass in forests than in hedgerows, most likely due to higher competition with ruderals and graminoids in hedgerows. Adult plant performance of both species generally benefitted from experimental warming, despite lower survival of A. nemorosa in heated plots. Transplantation affected the species differently: A. nemorosa plants grew taller, produced more biomass and showed higher survival when transplanted at their home site, indicating local adaptation, while individuals of G. urbanum showed greater height, biomass, reproductive output and survival when transplanted northwards, likely owing to the higher light availability associated with increasing photoperiod during the growing season. Conclusions These findings demonstrate that some forest herbs can show phenotypic plasticity to warming temperatures, potentially increasing their ability to benefit from hedgerows as ecological corridors. Our study thus provides novel insights into the impacts of climate change on understorey plant community dynamics in hedgerows, and how rising temperature can influence the efficiency of these corridors to assist forest species’ persistence and colonization within and beyond their current distribution range.

中文翻译:

温度对灌木丛中森林下层植物的影响:变暖和移植联合实验

背景和目标 树篱已被证明可以改善森林的连通性,从而增加物种追踪不断变化的生物气候包络的可能性。然而,树篱中的物种如何对温度变化做出反应,以及与附近森林中的物种相比,影响是否不同,仍然是未知的。我们旨在阐明气候系统的持续变化将如何影响树篱在支持森林植物在农业景观中的持久性和迁移方面的效率。方法在这里,我们报告了第一次在树篱中进行变暖实验的结果。我们将沿 860 公里纬度样带的植物相互移植与实验性变暖相结合,以评估温度对树篱与森林中两种常见森林草本植物(Anemone nemorosa 和 Geum urbanum)营养生长和繁殖的影响。主要结果 这两个物种在森林中比在树篱中长得更高,并产生更多的生物量,这很可能是由于与树篱中的 ruderals 和 graminoids 的竞争加剧。尽管 A. nemorosa 在加热地块中的存活率较低,但两种物种的成年植物表现通常都受益于实验性变暖。移植对物种的影响不同:A. nemorosa 植物长得更高,产生更多的生物量并在其家乡移植时表现出更高的存活率,表明局部适应,而 G. urbanum 的个体表现出更高的高度、生物量、向北移植时的生殖产量和存活率,可能是由于生长季节期间光周期增加相关的光照可用性更高。结论 这些研究结果表明,一些森林草本植物可以表现出对变暖温度的表型可塑性,这可能会增加它们从作为生态走廊的树篱中受益的能力。因此,我们的研究为气候变化对灌木丛中林下植物群落动态的影响提供了新的见解,以及温度升高如何影响这些走廊的效率,以帮助森林物种在其当前分布范围内和之外的持久性和定殖。可能是由于在生长季节增加光周期相关的更高的光照可用性。结论 这些研究结果表明,一些森林草本植物可以表现出对变暖温度的表型可塑性,这可能会增加它们从作为生态走廊的树篱中受益的能力。因此,我们的研究为气候变化对灌木丛中林下植物群落动态的影响提供了新的见解,以及温度升高如何影响这些走廊的效率,以帮助森林物种在其当前分布范围内和之外的持久性和定殖。可能是由于在生长季节增加光周期相关的更高的光照可用性。结论 这些研究结果表明,一些森林草本植物可以表现出对变暖温度的表型可塑性,这可能会增加它们从作为生态走廊的树篱中受益的能力。因此,我们的研究为气候变化对灌木丛中林下植物群落动态的影响提供了新的见解,以及温度升高如何影响这些走廊的效率,以帮助森林物种在其当前分布范围内和之外的持久性和定殖。
更新日期:2021-05-26
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