Should the relationship between leaf margin and temperature be re-defined for areas with colder climates?

IF 3.4 2区环境科学与生态学 Q2 ECOLOGY

Journal of Biogeography Pub Date : 2024-05-01 DOI:10.1111/jbi.14855

Grzegorz Iszkuło, Żanna Tyrała-Wierucka, Peter A. Thomas, Magdalena Terlecka, Łukasz Walas, Dominik Tomaszewski

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引用次数: 0

Abstract

Aim

The well-proven positive correlation between the increased proportion of entire-leaved woody dicotyledonous species and increased mean annual temperature has been commonly used to estimate temperature in the past. However, in regions of colder climates, this relationship is not straightforward, questioning the accuracy of temperature estimation.

Location

Finland, Poland, Germany.

Taxon

Dicotyledons.

Methods

The floristic composition of 10 × 10 km squares in 20 km wide transects through Finland, Poland and Germany was analysed.

Results

At higher temperatures, deciduous woody plants appeared to show the expected positive relationship between mean annual temperature and the proportion of entire leaf margins. However, we found a negative correlation within woody deciduous plants at higher latitudes with mean annual temperature values from approximately −2.5°C to +2–4°C and at all temperatures when all woody plants were included. Herbaceous species showed a weak relationship between morphology and temperature.

Main Conclusions

The hypothesis that the phenomenon was caused by a large percentage of entire-leaved evergreen species that winter under snow cover was rejected. These results indicate that using the leaf margin analysis method for past temperature estimation is increasingly inaccurate at colder temperatures. Consequently, we recommend avoiding this method at locations where the mean annual temperature falls below 5°C.

Abstract Image

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气候寒冷的地区是否应该重新界定叶缘与温度之间的关系？

目的经证实，全叶木本双子叶植物物种比例的增加与年平均气温的升高之间存在正相关关系，这在过去通常被用来估算气温。地点芬兰、波兰、德国分类群双子叶植物方法分析了芬兰、波兰和德国境内 20 千米宽横断面上 10 × 10 千米方格的植物组成。结果在较高温度下，落叶木本植物的年平均温度与全叶边缘比例之间似乎呈现出预期的正相关关系。然而，我们发现在较高纬度地区的落叶木本植物中，年平均气温值从大约 -2.5°C 到 +2-4°C，以及在所有木本植物都包括在内的所有温度下，两者之间呈负相关。草本植物的形态与温度之间的关系较弱。主要结论：该现象是由于冬季在积雪覆盖下过冬的全叶常绿植物所造成的，但这一假设被否定。这些结果表明，在气温较低的情况下，使用叶缘分析方法估计过去气温的准确性越来越低。因此，我们建议在年平均气温低于 5°C 的地区避免使用这种方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Biogeography 环境科学-生态学

CiteScore

7.70

自引率

5.10%

发文量

203

审稿时长

2.2 months

期刊介绍： Papers dealing with all aspects of spatial, ecological and historical biogeography are considered for publication in Journal of Biogeography. The mission of the journal is to contribute to the growth and societal relevance of the discipline of biogeography through its role in the dissemination of biogeographical research.