Migrating Populus with climate change: Phenology, coppice management, cold spell susceptibility, leaf dynamics, and biomass production

IF 3.8 1区 农林科学 Q1 FORESTRY
Jiaxin Wang , Randall J. Rousseau , Austin Himes , Courtney Siegert , Ying Ouyang , Heidi J. Renninger
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Abstract

Understanding the phenology and productivity of Populus species is crucial for effective management and conservation strategies amid climate change. We investigated leaf budbreak timing, susceptibility to cold damage, leaf dynamics, and biomass production of 168 Populus genotypes with diverse provenances in the southeastern United States. Our study revealed significant variation in budbreak timing across different taxa and years, with genotypes inheriting traits adapted to their parents’ local climates. Temperature emerged as a key factor triggering budbreak, while leaf development depended on other environmental cues such as photoperiod. Notably, budbreak occurred approximately 20 days earlier in 2023 compared to 2022 due to higher accumulated degree days (ADDs). Short-rotation-coppice (SRC) management delayed budbreak by five to ten days. Cold damage was significant in 2023, particularly for genotypes from northern provenances and those with P. maximowiczii parentage. Severe damage was also observed in eastern cottonwood (Populus deltoides ​× ​Populus deltoides (D ​× ​D)) genotypes, despite most having southeastern US parentages. Leaf dynamics, including leaf duration and leaf area index (LAI), varied across taxa and sites, with earlier budbreak correlating with extended growing seasons and increased LAI. Biomass production was intricately linked to phenological events, with earlier budbreak leading to increased biomass production and greater susceptibility to cold damage. Our findings highlight the importance of genetics, environment, and coppicing management in understanding and managing Populus phenology and biomass production. These insights provide valuable guidance for developing effective breeding, conservation, and management strategies for Populus species in the context of climate change.
气候变化下的迁徙杨:物候学、灌木林管理、寒潮易感性、叶片动态和生物量生产
了解杨树物候和生产力对气候变化背景下的有效管理和保护策略至关重要。研究了美国东南部不同种源的168种杨树基因型的发芽时间、对冷害的敏感性、叶片动态和生物量生产。我们的研究表明,不同分类群和年份的发芽时间存在显著差异,基因型遗传了适应其亲本当地气候的性状。温度是引发发芽的关键因素,而叶片发育则依赖于光周期等其他环境因素。值得注意的是,由于累积度(add)较高,2023年的发芽时间比2022年提前了大约20天。短轮耕(SRC)管理将发芽推迟了5 - 10天。2023年冷害显著,特别是北方种源的基因型和最大氏斑孢亲本的基因型。在东部白杨(Populus deltoides × Populus deltoides (D × D))基因型中也观察到严重的损害,尽管大多数具有美国东南部的亲本。叶长和叶面积指数(LAI)的动态变化在不同的类群和立地上存在差异,出芽时间越早,生长季节越长,叶面积指数越高。生物量生产与物候事件错综复杂地联系在一起,较早的发芽导致生物量产量增加,对冷损害的敏感性更大。我们的研究结果强调了遗传、环境和适应管理在理解和管理杨树物候和生物量生产中的重要性。这些见解为气候变化背景下制定有效的杨树育种、保护和管理策略提供了有价值的指导。
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来源期刊
Forest Ecosystems
Forest Ecosystems Environmental Science-Nature and Landscape Conservation
CiteScore
7.10
自引率
4.90%
发文量
1115
审稿时长
22 days
期刊介绍: Forest Ecosystems is an open access, peer-reviewed journal publishing scientific communications from any discipline that can provide interesting contributions about the structure and dynamics of "natural" and "domesticated" forest ecosystems, and their services to people. The journal welcomes innovative science as well as application oriented work that will enhance understanding of woody plant communities. Very specific studies are welcome if they are part of a thematic series that provides some holistic perspective that is of general interest.
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