Drought limits wood production of Juniperus przewalskii even as growing seasons lengthens in a cold and arid environment

Zhang, Junzhou; Gou, Xiaohua; Alexánder, Mario; Xia, Junfang; Wang, Fang; Zhang, Fen; Zi-hong, Man; Pederson, Neil

doi:10.1016/j.catena.2020.104936

Cited by 38 publications

(24 citation statements)

References 60 publications

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“…3) demonstrates that the primary effect of warming temperatures on annual tree growth is not an augmentation through an earlier start to growth, but rather a reduction associated to drought stress during the peak growing season 26 . Warm springs may also amplify summer drought stress in some times and places, effectively canceling out any positive effects of an extended growing period 3,32 ; however, spring temperatures and summer Standardized Precipitation Evapotranspiration Index 33 were uncorrelated within our dendrometer band analysis, implying that the effects of warm spring temperatures on growth phenology elucidated here (Fig. 1) were not attributable to summer drought.…”

Section: Discussionmentioning

confidence: 71%

Warm springs alter timing but not total growth of temperate deciduous trees

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Kim

D’Orangeville

et al. 2022

Nature

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Section: Discussionmentioning

confidence: 71%

Warm springs alter timing but not total growth of temperate deciduous trees

Dow

Kim

D’Orangeville

et al. 2022

Nature

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“…In drier ecosystems, water availability for roots, rather than rainfall per se, is another important driver of cambial reactivation 34 . Temperature and the availability and demand of water also codetermine the rate of growth [35][36][37] . In addition to climate, the phenology of wood formation is also associated with physiological trade-offs with bud and foliar phenology, because phytohormones produced in developing buds and foliage regulate the rate of cambial division 29,38 and can lead to changes in priorities for allocating carbon within a tree.…”

Section: Introductionmentioning

confidence: 99%

An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas

et al. 2022

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Climatic warming alters the onset, duration and cessation of the vegetative season. While prior studies have shown a tight link between thermal conditions and leaf phenology, less is known about the impacts of phenological changes on tree growth. Here, we assessed the relationships between the start of the thermal growing season (TSOS) and tree growth across the extratropical Northern Hemisphere using 3451 tree-ring chronologies and daily climatic data for 1948-2014. An earlier TSOS promoted growth in regions with high ratios of precipitation to temperature but limited growth in cold dry regions. Path analyses indicated that an earlier TSOS enhanced growth primarily by alleviating thermal limitations on wood formation in boreal forests and by lengthening the period of growth in temperate and Mediterranean forests. Semi-arid and dry subalpine forests, however, did not benefit from an earlier onset of growth and a longer growing season, presumably due to associated water loss and/or more frequent early spring frosts. These emergent patterns of how climatic impacts on wood phenology affect tree growth at regional to hemispheric scales hint at how future phenological changes may affect the carbon sequestration capacity of extratropical forest ecosystems.

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“…In 2017, the high VPD accompanied by high temperatures in the study area from July to August is likely to aggravate the transpiration of the trees, which may lead to a decrease of stomatal conductance and limited photosynthesis (Mathur et al, 2014;Zhou et al, 2015;Ouyang et al, 2018;Grossiord et al, 2020;Song et al, 2020). These conditions may cause a decrease in carbohydrate availability and a decreased growth rate (Michelot et al, 2012;Zhang et al, 2021). Relevant studies based on tree rings and stable carbon isotope have also confirmed the negative effect of summer drought on tree growth on an interannual scale (Li et al, 2019;Bai et al, 2020;Dong et al, 2020).…”

Section: Effects Of Climate Factors On the Bimodal Pattern Of Xylogenesismentioning

confidence: 76%

“…Additionally, irrigation and natural experiments on mature trees found that the unirrigated trees/xericsite finished wood formation earlier than the irrigated trees/dry-mesic site (Gruber et al, 2010;Eilmann et al, 2011), confirming the critical role of water availability in stem growth cessation. Generally, drought-stressed termination of cambium activity has been observed in arid regions such as the Qilian Mountains in northwestern China (Zhang et al, 2021) and the Mediterranean region with summer drought stress (Bader et al, 2013;Garcia-Forner et al, 2019). In 2017, the earlier cessation of the cambium activities of C. fortunei and C. lanceolata indicates that, although in relatively humid subtropical regions, seasonal droughts may also limit tree growth.…”

Section: Climatic Control On the Onset And Termination Of Cambial Activitymentioning

confidence: 99%

Intra-Annual Wood Formation of Cryptomeria fortunei and Cunninghamia lanceolata in Humid Subtropical China

et al. 2021

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Monitoring cambial activity is important for a better understanding of the mechanisms governing xylem growth responses to climate change, providing a scientific basis for tree-ring-based climate reconstructions and projections about tree growth under future climate scenarios. It plays an even more important role in investigating evergreen tree growth in regions with less distinct seasonal cycles. Subtropical evergreen forests have been studied in recent years for their sensitivity to climate change, but it remains unclear how xylem growth is driven by subtropical climates. To further understand the climate-growth response strategies of subtropical conifers, we micro-cored Cryptomeria fortunei and Cunninghamia lanceolata weekly in 2016 and 2017 at the humid subtropical Gushan Mountain in southeastern China. Our weekly growth monitoring showed that the vegetation periods of these two species were both approximately 2–3 months longer than trees in temperate and boreal forests. The growth of C. fortunei in 2016 and 2017 and C. lanceolata in 2017 showed a bimodal pattern of xylogenesis, which was induced by summer drought. The results also indicated that the earlier end of the xylem formation was related to the yearly drought stress. These findings provide more specific information about tree growth and evidence of how climate influences wood production at the cellular level in subtropical regions.

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Drought limits wood production of Juniperus przewalskii even as growing seasons lengthens in a cold and arid environment

Cited by 38 publications

References 60 publications

Warm springs alter timing but not total growth of temperate deciduous trees

Warm springs alter timing but not total growth of temperate deciduous trees

An earlier start of the thermal growing season enhances tree growth in cold humid areas but not in dry areas

Intra-Annual Wood Formation of Cryptomeria fortunei and Cunninghamia lanceolata in Humid Subtropical China

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