Stable water isotopes reveal the onset of bud dormancy in temperate trees, whereas water content is a better proxy for dormancy release

Earlier spring growth onset in temperate forests is a visible effect of global warming and affects global water and carbon cycling. Therefore, it is crucial to accurately predict the shift in spring phenology under projected future warming. However, current phenological models lack physiological information and are rarely experimentally validated. Therefore, twig cuttings of five deciduous tree species were sampled at two climatically different sites throughout the winter of 2019/2020. Twig budburst success, thermal time to budburst, bud water content, and short-term 2H-labelled water uptake into buds were quantified to link bud dormancy status with vascular water transport efficacy. We found strong 2H-labelled water uptake into buds during leaf senescence, followed by a sharp decrease that we attributed to the initiation of dormancy. However, we did not find increasing 2H-labelled water uptake into buds with progression of winter, whereas all species showed a linear relationship betwee..., , , # Stable water isotopes reveal the onset of bud dormancy in temperate trees, whereas water content is a better proxy for dormancy release

## Provenance for this README

* Authors: Manuel G. Walde
* Other contributors: Bénédice Wenden, Isabelle Chuine, Arthur Gessler, Matthias Saurer and Yann Vitasse
* Date created: 2023-07-21
* Date modified: 2023-07-21

## Dataset Version and Release History

* Current Version:
* Number: 1.0.0
* Date: 2023-07-21
* Persistent identifier: n/a
* Summary of changes: n/a
* Embargo Provenance: n/a
* Scope of embargo: n/a
* Embargo period: n/a

## Dataset Attribution and Usage

* Dataset Title: Data for the article \"Tracking water isotope flow into buds of temperate trees reveals the onset of endodormancy but not dormancy release\"
* Persistent Identifier: [https://doi.org/10.5061/dryad.sn02v6x99](https://doi.org/10.5061/dryad.sn02v6x99Dataset)
* Dataset Contributors:
* Creators: Manuel G. Walde
* ...

温带森林春季物候提前是全球变暖的显著表征，同时会对全球水循环与碳循环产生影响。因此，在未来预估的变暖情景下精准预测春季物候的变化至关重要。然而，当前的物候模型缺乏生理相关信息，且极少经过实验验证。为此，研究团队于2019/2020年冬季，在两个气候条件不同的采样点，采集了5种落叶乔木的枝条插穗。通过量化枝条的芽萌发成功率、芽萌发所需的积温、芽含水量，以及短期氘（²H）标记水在芽中的吸收量，来关联芽休眠状态与维管输水效率。研究发现，叶片衰老阶段芽中氘标记水吸收量显著升高，随后急剧下降，我们将该现象归因于休眠启动。但随着冬季推进，芽中氘标记水的吸收量并未出现递增趋势；不过所有供试树种均呈现出线性相关关系……# 稳定水同位素可揭示温带树木芽休眠的起始，而芽含水量则是休眠解除的更佳替代指标

## 本README文件来源说明
* 作者：Manuel G. Walde
* 其他贡献者：Bénédice Wenden、Isabelle Chuine、Arthur Gessler、Matthias Saurer及Yann Vitasse
* 创建日期：2023年7月21日
* 修改日期：2023年7月21日

## 数据集版本与发布历史
* 当前版本：
* 版本号：1.0.0
* 发布日期：2023年7月21日
* 持久标识符：无
* 变更摘要：无
* 封禁来源说明：无
* 封禁范围：无
* 封禁期限：无

## 数据集引用与使用规范
* 数据集标题：论文"追踪温带树木芽内水同位素流动可揭示内休眠起始，但无法反映休眠解除"配套数据
* 持久标识符：[https://doi.org/10.5061/dryad.sn02v6x99](https://doi.org/10.5061/dryad.sn02v6x99Dataset)
* 数据集贡献者：
* 创作者：Manuel G. Walde
* ……