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Foliar summer frost resistance measured via electrolyte leakage approach as related to plant distribution, community composition and plant traits
Functional Ecology ( IF 4.6 ) Pub Date : 2020-12-07 , DOI: 10.1111/1365-2435.13740 Solveig Franziska Bucher 1 , Sergey Rosbakh 2
中文翻译：
通过电解质渗漏法测得的夏季叶面抗霜性与植物分布，群落组成和植物性状有关
更新日期：2020-12-07
Functional Ecology ( IF 4.6 ) Pub Date : 2020-12-07 , DOI: 10.1111/1365-2435.13740 Solveig Franziska Bucher 1 , Sergey Rosbakh 2
Affiliation
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- Frost resistance (FR) is a fundamental process determining various aspects of plant life. Measurements of FR remain challenging as existing methods are time‐ and labour‐intensive.
- Here, we test the applicability of foliar summer FR measured via the ‘electrolyte leakage’ approach (FRPEL), a simple and inexpensive technique so far underused in ecological research to estimate FR. We tested the ability of this trait to predict (a) species occurrence, (b) community composition along an elevation gradient and (c) analysed its relationship with nine other traits (SLA, Cmass, Nmass, Pmass, Camass, Mgmass, Kmass, canopy height and the ability to form rosettes) related to plant performance. We studied 183 vascular species occurring at 37 sites, which we also analysed in terms of species composition along an elevation gradient from 656 to 2,363 m a.s.l. in the Bavarian Alps, Germany.
- Species' FRPEL values correlated significantly with the species occurrence along the elevation gradient. However, this relationship was weak as it explained only 10% in the variation of the Landolt indicator values, a proxy for species geographic ranges. We found a strong positive relationship between community‐weighted FRPEL values and elevation suggesting a strong environmental filtering of this trait that removes species with low FR from the local species pool at high elevations. The community functional diversity of FRPEL significantly increased with increasing elevation suggesting a higher trait divergence in harsher climates. We found significant negative relationships between FRPEL and SLA, canopy height and the ability to form leaf rosettes, indicating a trade‐off in plants between the investment in conservative strategies, in our case FR, and fast resource acquisition.
- Our study highlights the potential of using FRPEL more frequently in ecological research as we were able to reconfirm three patterns inferred by more precise yet time‐consuming and labour‐intensive approaches. We demonstrate that FRPEL can be used to predict species occurrence and infer assembly rules along elevation gradients. Furthermore, we found that FRPEL is linked to plant functional traits associated with plant performance and morphological features of the plants. However, the trait's predictive power varied greatly among the study objectives and levels.
中文翻译：
通过电解质渗漏法测得的夏季叶面抗霜性与植物分布，群落组成和植物性状有关
- 防冻性（FR）是确定植物寿命各个方面的基本过程。由于现有方法费时费力，因此FR的测量仍然具有挑战性。
- 在这里，我们测试了通过“电解质渗漏”方法（FR PEL）测量的夏季夏季FR的适用性，这是迄今为止在生态研究中尚未使用的估算FR的简单且廉价的技术。我们测试了该性状预测（a）物种发生，（b）沿海拔梯度的群落组成以及（c）分析其与其他九个性状（SLA，C质量，N质量，P质量，Ca质量，镁质量，K质量，树冠高度和形成玫瑰花结的能力）与植物的生长性能有关。我们研究了在37个地点发生的183种维管物种，并根据德国巴伐利亚阿尔卑斯山从656到2363 m asl的海拔梯度的物种组成进行了分析。
- 物种的FR PEL值与沿着海拔梯度的物种的发生显着相关。但是，这种关系很弱，因为它仅解释了Landolt指标值的变化（代表物种地理范围）的10％。我们发现，社区加权FR PEL值与海拔之间存在很强的正相关关系，这表明对该特征进行了强大的环境过滤，从而从高海拔的本地物种库中删除了具有较低FR的物种。FR PEL的群落功能多样性随着海拔的升高而显着增加，这表明在更恶劣的气候下性状的差异更大。我们发现FR PEL之间存在显着的负相关关系 SLA，冠层高度和形成叶片玫瑰花结的能力，表明在保守策略（在我们的案例中为FR）中的投资与快速资源获取之间的权衡。
- 我们的研究突显了在生态研究中更频繁地使用FR PEL的潜力，因为我们能够再次确认通过更精确但耗时且劳动强度大的方法得出的三种模式。我们证明了FR PEL可用于预测物种的发生并推断沿海拔梯度的装配规则。此外，我们发现FR PEL与与植物性能和植物形态特征相关的植物功能性状有关。但是，该特质的预测能力在研究目标和水平之间差异很大。
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