Summer temperature variability inferred from tree-ring records in the central Hengduan Mountains, southeastern Tibetan Plateau

Jiang, Yu; Liu, Qijing; Meng, Shengwang; Zhou, Guang‐Jie; Shah, Syed Tahir; Xu, Zhenzhao

doi:10.1016/j.dendro.2018.08.004

Cited by 15 publications

(4 citation statements)

References 40 publications

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“…The region has high mountains and deep valleys, with snowcapped mountains over 6,700 m above sea level, most of which are in the national nature reserves and belong to global biodiversity hotspots and priority conservation areas (Myers et al, 2000;Xing and Ree, 2017). The average annual temperature in this region is only 6 • C. The average annual precipitation is 624.7 mm and decreases from west to east due to the blocking effect of the Hengduan Mountains on the summer monsoon with abundant water vapor, and 73% of the precipitation is concentrated from June to September (Yu et al, 2018).…”

Section: Study Areamentioning

confidence: 99%

Harmonizing and Searching Macroinvertebrate Trait Information in Alpine Streams: Method and Application–A Case Study in the Three Parallel Rivers Region, China

Tian

et al. 2022

Front. Ecol. Evol.

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The traits of organisms provide critical information for understanding changes in biodiversity and ecosystem function at large scales. In recent years, trait databases of macroinvertebrates have been developed across continents. Anyone using different databases to search for traits will encounter a series of problems that lead to uncertain results due to the inconsistency of the trait information. For example, traits for a particular macroinvertebrate taxon may be inconsistent across databases, coded in inconsistent ways, or cannot be found. However, most of the current studies do not clearly state their solutions, which seriously hinders the accuracy and comparability of global trait studies. To solve these problems, we collected representative databases from several continents, including the United States, Europe, South Africa, Bolivia, Australia, and New Zealand. By comparing the inconsistency of similar trait classifications in the nine databases, we harmonized 41 of these grouping features. We found that these databases differed widely in terms of the range and category of traits. And the method of coding traits also varies from database to database. Moreover, we showed a set of trait searching rules that integrate trait databases from different regions of the world, allowing traits to be identified more easily and uniformly using different trait databases worldwide. We also applied this method to determine the traits of 155 macroinvertebrate taxa in the Three Parallel Rivers Region (TPRR). The results showed that among a total of 155 macroinvertebrate taxa, the 41 grouping features of all genera were not fully identified, and 32 genera were not recorded (thus using family-level data). No trait information was found at all for two families, which contain two genera. This suggests that many macroinvertebrate taxa and their traits have not been fully studied, especially in those regions, including China, where macroinvertebrate trait studies are lagging. This inadequacy and unevenness have seriously hindered the study and development of macroinvertebrate trait and functional diversity worldwide. Our results complement the information on stream macroinvertebrate traits in the TPRR, a global biodiversity hotspot, and greatly promote the uniformity of global trait research and the accuracy and comparability of trait research in different regions.

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Section: Study Areamentioning

confidence: 99%

Harmonizing and Searching Macroinvertebrate Trait Information in Alpine Streams: Method and Application–A Case Study in the Three Parallel Rivers Region, China

Tian

et al. 2022

Front. Ecol. Evol.

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“…Due to the limitations of sampling sites, the species they usually use mostly are Picea and Abies. These sites are predominantly situated not on the plateau surface but rather at the upper treeline on hillsides (Li et al, 2015;Yu et al, 2018) and the upper part of the forest belt (Fan et al, 2010;Wang et al, 2014;Keyimu et al, 2021). Additionally, millennium temperature series with high resolution and good dating control over the southeastern TP are still limited.…”

Section: Introductionmentioning

confidence: 99%

A 900y Annual Temperature Reconstruction for the Southeastern Tibetan Plateau from Tree Ring Width of Juniperus saltuaria

Xu,

Shang,

Zheng

et al. 2024

Preprint

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Two annually resolved and absolutely dated Juniperus saltuaria (JS) tree ring width chronologies from the Haizi mountain, southeastern TP were reported in here. We sampled two sites in different landscapes, one is located at the forest line at ca. 4200 m above sea level beside an incised valley, and the other at the plateau surface, ca. 4500 m in elevation. Comparisons of statistical parameters between two sites and their tree ring index correlation coefficient with meteorologic data of DaoCheng shows that the latter site exhibits higher value than the former one. These indicate that those trees growing along the valley side may be more susceptible to local environment, and those on the plateau surface can provide reliable record for regional climate. Based on the latter chronology, a 903a long annual mean temperature (Tmean) series (1115-2017 CE) was reconstructed. It is the longest width chronology reconstructed by JS at present. The entire sequence shows consistent warm-cold patterns with other temperature reconstructions of the TP, Asia, and Northern Hemisphere. The warmest (coldest) period occurred at 1998-2017 CE (1115-1145 CE), respectively. There was no doubt that temperature raised sharply since the end of the 20th century. In addition, the sequence demonstrates multi-decadal, decadal and inter-decadal variations, further multi-taper method reveals dominant periodicities are 147, 36, 18, 7 and 2-2.6a, likely been affected by the Atlantic Multidecadal Oscillation and solar activity. The forcing of volcanic eruptions resulted to subsequent 1-3 years temperature drops.

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“…Therefore, the area is considered an excellent location to conduct a dendroclimatology study (Fan et al, 2009). Many efforts have been made to reconstruct historical climate and to find key climate factors affecting tree growth by using tree ring data of typical coniferous tree species in CHM, such as for Abies georgei (Fan et al, 2009;Liang et al, 2010;Panthi et al, 2018), Larix potaninii (Zhang et al, 2017¸ 2020, Picea brachytyla (Fan et al, 2008;Li et al, 2012;Yue et al, 2022), Picea likiangensis (Wang et al, 2018;Yu et al, 2018;Du et al, 2020), and Tsuga dumosa (Guo G. et al, 2009;Li et al, 2011;Aryal et al, 2020). These studies found that tree radial growth was influenced by both temperature and precipitation, but the growth response pattern was depended on species characteristics and site conditions.…”

Section: Introductionmentioning

confidence: 99%

Radial growth response of Pinus Yunnanensis to climate in high mountain forests of northwestern Yunnan, southwestern China

Xie,

Yan,

Sun

et al. 2024

Front. For. Glob. Change

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Understanding the relationship between tree growth and environmental conditions is essential to elucidating the impact of global climate change on forest ecosystems. We used the dendrochronology method to examine the growth sensitivity of a typical conifer to climate change in mountain forests of Central Hengduan Mountain. The study involved the establishment of tree ring width chronologies of Pinus yunnanensis in both Haba Snow Mountain (HB) and Yulong Snow Mountain (YL) in northwestern Yunnan, enabling the detection of the relationship between its radial growth and climates, i.e., monthly total precipitation, monthly temperatures (average minimum, mean and maximum) and monthly Palmer Drought Severity Index (PDSI). Response function and redundancy analysis (RDA) were used to identify correlations between climate variables and radial growth, and moving interval analysis was applied to determine the stability of climate-growth relationship. The findings demonstrated that the growth of P. yunnanensis had similar response patterns to climate change at two sites, exhibiting growth synchronization and common signals. Specifically, the radial growth of P. yunnanensis was negatively correlated with May temperature, while temperature in current October significantly promoted radial growth. Precipitation in June was the common climate variable with inverse effects between two sites, with positive impacts on YL and negative impacts on HB. The results of moving interval analysis were consistent with response function and RDA, presenting significant correlations in many years for those climatic variables significantly affecting tree growth. Stability analysis also revealed that the climate-growth relationship could fluctuate over a small range of time scales, induced by an abrupt change in climate. A forecast of strengthen in growth of P. yunnanensis forests was expected, since increases in precipitation and temperature of most months would benefit tree growth, and negative impacts of May temperature would be offset by the increase of precipitation in the corresponding month. These results could provide a basis for developing sustainable strategies of forest management under the climate change.

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Summer temperature variability inferred from tree-ring records in the central Hengduan Mountains, southeastern Tibetan Plateau

Cited by 15 publications

References 40 publications

Harmonizing and Searching Macroinvertebrate Trait Information in Alpine Streams: Method and Application–A Case Study in the Three Parallel Rivers Region, China

Harmonizing and Searching Macroinvertebrate Trait Information in Alpine Streams: Method and Application–A Case Study in the Three Parallel Rivers Region, China

A 900y Annual Temperature Reconstruction for the Southeastern Tibetan Plateau from Tree Ring Width of Juniperus saltuaria

Radial growth response of Pinus Yunnanensis to climate in high mountain forests of northwestern Yunnan, southwestern China

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