Dryness decreases average growth rate and increases drought sensitivity of Mongolia oak trees in North China

Zhang, Xianliang; Lv, Pengcheng; Xu, Chi; Xuan-rui, Huang; Rademacher, Tim

doi:10.1016/j.agrformet.2021.108611

Cited by 12 publications

(6 citation statements)

References 50 publications

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“…The dry-range-sensitive hypothesis predicts that trees growing in drier portions of their range are the most drought sensitive. Trees growing in resource-poor conditions-for example, shallow soils, steep slopes, and aspects exposed to greater solar radiation-are often more climate and drought sensitive (14)(15)(16). Similarly, many studies have observed greater reductions in radial growth during drought at drier sites than at more-mesic sites (15,(17)(18)(19)(20)(21)(22).…”

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confidence: 99%

Drought sensitivity in mesic forests heightens their vulnerability to climate change

Heilmayr,

Dudney,

Moore

2023

Science

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Climate change is shifting the structure and function of global forests, underscoring the critical need to predict which forests are most vulnerable to a hotter and drier future. We analyzed 6.6 million tree rings from 122 species to assess trees’ sensitivity to water and energy availability. We found that trees growing in wetter portions of their range exhibit the greatest drought sensitivity. To test how these patterns of drought sensitivity influence vulnerability to climate change, we predicted tree growth through 2100. Our results suggest that drought adaptations in arid regions will partially buffer trees against climate change. By contrast, trees growing in the wetter, hotter portions of their climatic range may experience unexpectedly large adverse impacts under climate change.

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confidence: 99%

Drought sensitivity in mesic forests heightens their vulnerability to climate change

Heilmayr,

Dudney,

Moore

2023

Science

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“…Conversely, in dry regions, decreasing soil moisture exacerbates drought stress and limited photosynthesis (Cai et al., 2009; Grillakis, 2019). Although a global synthesis is missing, observations in semi‐arid forests have also reported increased drought sensitivity for tree growth during the recent decade (Linares et al., 2011; Zhang et al., 2021). Thus, our result points out a greater potential for drought‐induced land carbon loss in arid and semi‐arid ecosystems under climate changes.…”

Section: Discussionmentioning

confidence: 99%

Tracking Global Patterns of Drought‐Induced Productivity Loss Along Severity Gradient

Wang

et al. 2022

JGR Biogeosciences

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Droughts significantly impact land carbon uptake by reducing the gross primary productivity (GPP). Projections suggest an increase in severe and extreme droughts in the twenty‐first century. Despite the importance of droughts on carbon uptakes, it remains unclear about the GPP responses under different drought severity and its changes under current climate changes. Using four state‐of‐the‐science GPP products, we showed that moderate (−1 ≤ SPEI < −1.5), severe (−1.5 ≤ SPEI < −2), and extreme (SPEI < −2) droughts caused on average 5%, 7%, and 9% GPP reductions, respectively, across the globe during the recent decades. Although the mean reductions varied among GPP products, we observed similar spatial patterns. The reductions increased significantly along the severity gradient, while the sharpest increases were observed in semi‐arid and grassland ecosystems. On a biome level, we found that the reductions increased nonlinearly with increasing drought severities for almost all vegetation types, but the trends and slopes varied significantly. In addition, we found that the mean drought‐induced GPP reductions had increased in dry ecosystems but decreased in humid ecosystems from 2001–2008 to 2009–2016. The result highlights the potential increase of drought‐induced land carbon sink loss responding to more extreme climates and offers new perspectives to improve the prediction of global carbon fluxes in a changing climate.

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“…mongolica. Q. mongolica (qm) is a widely distributed tree species in the broadleaf forests of Northeast China and is susceptible to aggravated drought [61]. It has great value as a highly exploited forest resource and is also included in the list of 100 forest plant species vulnerable to climate change [62].…”

Section: Sampled Tree Speciesmentioning

confidence: 99%

The Impact of Urbanization on Tree Growth and Xylem Anatomical Characteristics

Gao,

Zhao,

Chen

et al. 2023

Biology

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In the context of the intensification of global urbanization, how urbanization (urban heat island effect and air pollution) affects urban tree growth is not fully understood. In this paper, the radial growth and xylem anatomical characteristics of three different tree species (Quercus mongolica, Fraxinus mandshurica, and Pinus sylvestris var. mongolica) in urban and rural areas of Harbin were compared by means of tree-ring anatomy. The results showed that there were significant differences in the growth of both broadleaf trees and conifers between urban and rural areas. The vessel number, cumulative area of vessels, and theoretical hydraulic conductivity of all tree species in rural areas were higher than those in urban areas, indicating that urbanization may have the effect of slowing down growth. However, broadleaf trees in urban areas had higher vessel density and a greater percentage of a conductive area within xylem and theoretical xylem-specific hydraulic conductivity. The thickness of cell walls and cell wall reinforcement index of P. sylvestris var. mongolica were strongly reduced by air pollution, implying that it may be more sensitive to urbanization. Compared to Q. mongolica, F. mandshurica showed less sensitivity to urbanization. Warming and drying climate in Harbin may be an important factor affecting tree growth.

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Dryness decreases average growth rate and increases drought sensitivity of Mongolia oak trees in North China

Cited by 12 publications

References 50 publications

Drought sensitivity in mesic forests heightens their vulnerability to climate change

Drought sensitivity in mesic forests heightens their vulnerability to climate change

Tracking Global Patterns of Drought‐Induced Productivity Loss Along Severity Gradient

The Impact of Urbanization on Tree Growth and Xylem Anatomical Characteristics

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