Arctic Plant Responses to Summer Climates and Flooding Events: A Study of Carbon and Nitrogen‐Related Larch Growth and Ecosystem Parameters in Northeastern Siberia

Liang, Maochang; Sugimoto, Atsuko; Tei, Shunsuke; Takano, Shinya; Morozumi, Tomoki; Shingubara, Ryo; Murase, Jun; Maximov, Trofim C.

doi:10.1029/2022jg007135

Cited by 2 publications

(1 citation statement)

References 77 publications

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“…While the volume of air spaces in soil filled with gravitational water decreases considerably, the oxygen concentration in the soil declines. This might cause hypoxic conditions, aggravating nitrogen availability (Liang et al, 2023), development and functioning of the root system (Puhe, 2003;Kreuzwieser et al, 2009) and ultimately affecting tree growth.…”

Section: Phenology and Growthmentioning

confidence: 99%

Growth responses to elevated environmental humidity vary between phenological forms of Picea abies

Sellin,

Heinsoo,

Kupper

et al. 2024

Front. For. Glob. Change

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IntroductionGlobal warming promotes geographical variability in climate, although the trends differ for the lower and higher latitudes of the Northern Hemisphere. By the end of the current century, the climate models project an increase of up to 20–30% in summer precipitation for northern Europe, accompanied by an increase in atmospheric humidity. Information on the effects of increasing precipitation and air humidity on the performance of northern trees is scant.MethodsWe studied the effects of artificially elevated air relative humidity (RH) and soil moisture on growth, phenology and needle/shoot morphology of 5-year-old Norway spruce (Picea abies) saplings at the Free Air Humidity Manipulation (FAHM) experimental site in eastern Estonia. The trees were subjected to three treatments: C – control, ambient conditions; H – air humidification, mean relative humidity ~ + 5%; I – soil irrigation, precipitation +15%. Trees from pure stands were sampled from three experimental plots per treatment in 2022.ResultsThe needle morphology of P. abies was insensitive to moderate changes in air humidity and soil water content in northern mesic conditions. In contrast, the humidity treatments significantly affected shoot size, which decreased in the following order: C > I > H. This finding indicates a certain deceleration of the development of trees’ assimilating surface under elevated air humidity. The humidity manipulation did not influence the timing of bud burst, but the trees differentiated between two phenological forms – early-and late-flushing forms. Trees growing under elevated RH exhibited slower growth rates compared to trees in C and I treatments. The early-flushing trees grew faster, while the late-flushing trees performed better under increasing environmental humidity.ConclusionAt high latitudes, the increasing precipitation and concomitant rise in atmospheric humidity counteract the enhancement of trees’ growth and forest productivity predicted for boreal forests due to global warming. Given that the late phenological form of P. abies is more tolerant of wetter climates and less threatened by late spring frosts, it has a greater potential to adapt to regional climate trends predicted for northern Europe.

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Section: Phenology and Growthmentioning

confidence: 99%

Growth responses to elevated environmental humidity vary between phenological forms of Picea abies

Sellin,

Heinsoo,

Kupper

et al. 2024

Front. For. Glob. Change

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Arctic amplification causes earlier onset of seasonal tree growth in northeastern Siberia

Kirdyanov,

Kolmogorov,

Kruse

et al. 2024

Environ. Res. Lett.

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Although recent warming affects the high-northern latitudes at an unprecedented rate, little is known about its impact on boreal forests because in situ observations from remote ecosystems in Siberia are sparse. Here, we analyze the radial growth and climate sensitivity of 54 Cajander larches (Larix cajanderi Mayr.) from three sites across the northern treeline ecotone within the Omoloy river basin in northeastern Siberia. Three independent tree-ring width chronologies span 279–499 years and exhibit distinct summer temperature signals. These records further reveal evidence for sufficiently earlier onsets of growing seasons since the middle of the 20th century. This phenological shift coincides with rapidly increasing May temperatures and associated earlier snowmelt. Our findings reinforce the importance of high-precision ground measurements from remote regions in Siberia to better understand how warming-induced changes in the functioning and productivity of the boreal forest influence carbon, nutrient, and water cycle dynamics.

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Arctic Plant Responses to Summer Climates and Flooding Events: A Study of Carbon and Nitrogen‐Related Larch Growth and Ecosystem Parameters in Northeastern Siberia

Cited by 2 publications

References 77 publications

Growth responses to elevated environmental humidity vary between phenological forms of Picea abies

Growth responses to elevated environmental humidity vary between phenological forms of Picea abies

Arctic amplification causes earlier onset of seasonal tree growth in northeastern Siberia

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