Stem Radius Variation in Response to Hydro-Thermal Factors in Larch

Tian, Yuan; Zhang, Qiuliang; Liu, Xuan; Meng, Meng

doi:10.3390/f9100602

Cited by 10 publications

(6 citation statements)

References 36 publications

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“…It is a humid temperate zone with average annual temperatures of − 5.4 °C, and average annual precipitation of 500 mm, mainly concentrated in June to September, and average altitudes of 976.5 m a.s.l. It has an average 75% forest cover consisting of Larix gmelinii associated with Betula platyphylla, Populus davidiana and Pinus sylvestris (Tian et al 2018). The study area has a high incidence of fires, over 677 fires from 1990 to 2018.…”

Section: Study Areamentioning

confidence: 99%

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Driving force of soil microbial community structure in a burned area of Daxing’anling, China

et al. 2020

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Fires are an important factor impacting forest ecosystems of Daxing’anling and have a significant effect on soil microbial community structure. In this study, high-throughput sequencing for 16S rDNA and ITS rDNA were applied to analyze the changing characteristics and driving factors of bacterial and fungal community structures in burned areas with different fire severity. PICRUSt2 software was used to predict the functional characteristics of burned areas with different fire severity. The purpose was to unveil the responsive relationships among the structure and function of bacterial and fungal communities, fire severity, and post-disturbance restoration times. After high severity fires, the destruction of surface vegetation and loss of soil nutrients reduced the diversity and abundance of soil bacteria and fungi. The soil bacteria community structure, which was dominated by Acidobacteria, Proteobacteria, and Actinobacteria, changed to be dominated by Proteobacteria and Chloroflexi. As well, soil fungal community changed from domination by Helotiales, Eurotiales and Russulales to domination by Archaeorhizomycetales and Helotiales. Over time, soil bacterial community was gradually restored to pre-fire levels 30 years after the fire. Soil fungal community changed and failed to restore to pre-fire levels after 30 years. After low/intermediate severity fires, environmental factors were relatively unchanged so that soil bacteria diversity and abundance increased, optimizing community composition. The diversity and abundance of soil fungi decreased and the community structure changed slightly. Over time, both bacterial and fungal communities were gradually restored to pre-fire levels 30 years after the fire. After fire disturbance, with increasing severity, soil carbon fixation, lignin degradation, mineralization of organic nitrogen and hydrolysis of organic phosphorus are enhanced. Denitrification is weakened. Therefore, forest fires have certain positive effects on carbon, nitrogen and phosphorus cycles where soil bacteria and fungi are involved.

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Section: Study Areamentioning

confidence: 99%

“…In Daxing'anling forest, boreal and the mixed wood species are widely distributed (Tian et al 2018). This is a region of high fire risk.…”

Section: Introductionmentioning

confidence: 99%

Driving force of soil microbial community structure in a burned area of Daxing’anling, China

et al. 2020

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“…We anticipated that VPD would drive tree dehydration in black spruce and tamarack over multi‐day periods of TWD. Vapor pressure deficit drives transpiration, impacting tree water stress, (Harmon et al., 2021; Nehemy, Maillet et al., 2021; Nehemy, Benettin, et al., 2021; Salomón et al., 2022; Xue et al., 2022), increasing TWD in larch species (Tian et al., 2018) and decreasing growth in spruce species (Mirabel et al., 2023). We found a significant coherence between VPD and TWD, with higher VPD consistently causing increased TWD in black spruce and tamarack across sites, highlighting the contribution of atmospheric dryness to multi‐day periods of water stress.…”

Section: Discussionmentioning

confidence: 99%

Radiation, Air Temperature, and Soil Water Availability Drive Tree Water Deficit Across Temporal Scales in Canada's Western Boreal Forest

Perron,

Baltzer,

Detto

et al. 2024

Geophysical Research Letters

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Changes are projected for the boreal biome with complex and variable effects on forest vegetation including drought‐induced tree mortality and forest loss. With soil and atmospheric conditions governing drought intensity, specific drivers of trees water stress can be difficult to disentangle across temporal scales. We used wavelet analysis and causality detection to identify potential environmental controls (evapotranspiration, soil moisture, rainfall, vapor pressure deficit, air temperature and photosynthetically active radiation) on daily tree water deficit and on longer periods of tree dehydration in black spruce and tamarack. Daily tree water deficit was controlled by photosynthetically active radiation, vapor pressure deficit, and air temperature, causing greater stand evapotranspiration. Prolonged periods of tree water deficit (multi‐day) were regulated by photosynthetically active radiation and soil moisture. We provide empirical evidence that continued warming and drying will cause short‐term increases in black spruce and tamarack transpiration, but greater drought stress with reduced soil water availability.

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“…Among those, only some studies link daily stem radius variation (SRV) with environmental variables for conifers (e.g. Gruber, Zimmermann, Wieser, & Oberhuber, 2009; Oberhuber, Hammerle, & Kofler, 2015; Tian, Zhang, Liu, & Meng, 2018) and for temperate broad‐leaved species (Köcher, Horna, & Leuschner, 2012). So far, there were no studies on SRC cultivations.…”

Section: Introductionmentioning

confidence: 99%

Identifying the best plant water status indicator for bio‐energy poplar genotypes

2020

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This contribution provides better insights in the water relations and the physiological traits of four commercial poplar genotypes of different genetic background, 'Bakan', 'Oudenberg', 'Koster' and 'Grimminge'. The main continuous (nondestructive and providing continuous and automated data records) and discontinuous (destructive and not allowing automation) plant water status (PWS) indicators were monitored at a multigenotype, commercial-scale short-rotation coppice plantation in East-Flanders (Belgium), and their relationships with the principal environmental variables were assessed. All measurements were performed during the entire 2016 growing season on the third year of the third rotation in multistemmed trees. The discontinuous PWS indicators were measured on 10 separate days with a different evaporative demand and soil water content, while the continuous PWS indicators were recorded from April to November. The genotypes responded differently to environmental drivers and to soil conditions, based on the PWS indicators, featuring a different water behaviour in relation to the level of isohydricity. Poplar genotypes 'Koster' and 'Bakan' showed the typical water-conserving behaviour of isohydric species, while 'Grimminge' was more in line with the anisohydric ones. A principal component analysis showed that sap flow (F s ) was the most suitable PWS indicator. The F s and therefore the sap flow-based canopy transpiration (E c ) were tightly linked to the phenological stage of the trees as well as to vapour pressure deficit and photosynthetic photon flux density, based on relationships between E c and environmental variables. A quantitative predictive model was developed to estimate the crop water requirements for specific genotypes, by calculating transpiration per unit of ground area with a few environmental variables, monitored with easy-to-handle sensors.

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Stem Radius Variation in Response to Hydro-Thermal Factors in Larch

Cited by 10 publications

References 36 publications

Driving force of soil microbial community structure in a burned area of Daxing’anling, China

Driving force of soil microbial community structure in a burned area of Daxing’anling, China

Radiation, Air Temperature, and Soil Water Availability Drive Tree Water Deficit Across Temporal Scales in Canada's Western Boreal Forest

Identifying the best plant water status indicator for bio‐energy poplar genotypes

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