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. 2023 Jul 22;23:366. doi: 10.1186/s12870-023-04375-9

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 1 — Changes in leaf functional traits at the two sites. Points and density curves represent data distribution of leaf functional traits in herbs at Huzhong (HH) and Linzhi (LH), in xylophyta at Huzhong (HX) and Linzhi (LX), and across the two plant functional types at both Huzhong (HZ) and Linzhi (LZ) sites. Leaf functional traits included leaf tissue density (LD, a), leaf thickness (LT, b), specific leaf area (SLA, c), leaf nitrogen concentration per unit mass (N_mass, d), leaf nitrogen concentration per unit area (N_area, e), light-saturated photosynthetic rate per unit mass (A_mass, f), light-saturated photosynthetic rate per unit area (A_area, g), photosynthetic nitrogen use efficiency (PNUE, h). Black points denote means with SD bars. Different capital and lowercase letters indicate significant differences among plant functional types and sites, respectively (p < 0.05)