Population structure and regeneration dynamics of<i>Quercus variabilis</i>along latitudinal and longitudinal gradients

Gao, Wenqiang; Ni, Yanyan; Xue, Ze-Min; Xiaofei, Wang; Hu, Jun; Zhong-hai, Gao; Jiang, Zeping; Liu, Jianfeng

doi:10.1002/ecs2.1737

Cited by 24 publications

(17 citation statements)

References 91 publications

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“…Alternatively, other factors, such as recruitment limitation, rather than NSC at the north edges may contribute to the oak’s north-latitudinal limit formation. Our previous study found that the relative densities of seedlings of the species studied were significantly lower in the northern edge than in the core populations ( Gao et al, 2017 ).…”

Section: Discussionmentioning

confidence: 80%

The Concentration of Non-structural Carbohydrates, N, and P in Quercus variabilis Does Not Decline Toward Its Northernmost Distribution Range Along a 1500 km Transect in China

Liu

Deng

et al. 2018

Front. Plant Sci.

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Understanding the mechanisms that determine plant distribution range is crucial for predicting climate-driven range shifts. Compared to altitudinal gradients, less attention has been paid to the mechanisms that determine latitudinal range limit. To test whether intrinsic resource limitation contributes to latitudinal range limits of woody species, we investigated the latitudinal variation in non-structural carbohydrates (NSC; i.e., total soluble sugar plus starch) and nutrients (nitrogen and phosphorus) in mature and juvenile Chinese cork oak (Quercus variabilis Blume) along a 1500 km north-south transect in China. During the growing season and dormant season, leaves, branches, and fine roots were collected from both mature and juvenile oaks in seven sites along the transect. Tissue concentration of NSCs, N, and P did not decrease with increasing latitude irrespective of sampling season and ontogenetic stage. Furthermore, higher levels of NSCs and N in tissues of juveniles relative to mature trees were found during the dormant season. Partial correlation analysis also revealed that during the dormant season, soluble sugar, NSC, the ratio of soluble sugar to starch, and tissue nitrogen concentration were correlated positively with latitude but negatively with precipitation and mean temperature of dormant season. Our results suggest that carbon or nutrient availability may not be the driving factors of the latitudinal range limit of the studied species. Further studies should be carried out at the community or ecosystem level with multiple species to additionally test the roles of factors such as regeneration, competition, and disturbance in determining a species’ northern distribution limit.

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Section: Discussionmentioning

confidence: 80%

The Concentration of Non-structural Carbohydrates, N, and P in Quercus variabilis Does Not Decline Toward Its Northernmost Distribution Range Along a 1500 km Transect in China

Liu

Deng

et al. 2018

Front. Plant Sci.

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“…Zhu, Lu, and Zhang (2014) reported that forest gaps augment the regeneration of woody plant species. Besides, local factors, soil and stand conditions play substantial role in regeneration dynamics (Gao et al, 2017). Tree species having no regeneration may be due to the availability of enough moisture content of the soil for the germination of seeds also reported by Tiwari, Rana, Krishan, Sharma, and Bhandari (2018).…”

Section: Discussionmentioning

confidence: 93%

Population structure and regeneration status of rhododendrons in temperate mixed broad-leaved forests of western Arunachal Pradesh, India

Paul

Khan

Das

2018

Geology, Ecology, and Landscapes

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This study was conducted to investigate the population structure and regeneration status of Rhododendron tree species in temperate mixed broad-leaved forests in Tawang and West Kameng districts of western Arunachal Pradesh, India. Population structure was determined through densities of seedlings, saplings and adults from the sampling quadrats. Based on density of individuals at the seedling, sapling and adult, the regeneration status of the species was determined. Density and basal area of the selected rhododendrons ranged from 16 individuals ha −1 to 1422 individuals ha −1 and 0.24 m 2 ha −1 to 131.30 m 2 ha −1 , respectively. Rhododendron species (viz. R. arboreum, R. arboreum ssp. delavayi var. delavayi, R. barbatum and R. kesangiae) exhibited reverse J-shaped distribution with the density of sapling less than seedling and adult population. Density of selected Rhododendron species is found to be higher between the girth classes 10-30 cm to 130-150 cm and decreased with the increase of girth in all the study stands. About, 90% degrees of disturbances recorded due to cooking and space heating purposes. Among the regenerating species, 77% of the species exhibited fair regeneration, 8% species showed good regeneration while 15% of the species exhibited no regeneration. However, 90% of the tree species showed fair regeneration in disturbed stands than the undisturbed stands. Selected Rhododendron species exhibited fair regeneration in their respective stands. Inadequate regeneration status and population structure of tree species, including rhododendrons, are observed as the density of sapling less than seedling and adult population. Anthropogenic disturbances resulted to be declined in populations of Rhododendron and may lead many species to endangered, rare and threatened categories. Therefore, proper conservation and management initiatives with active involvement of local people are urgent need to protect this keystone plant species in their habitat particularly in western Arunachal Himalaya.

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“…According to species distribution models and field investigations, our previous work (Gao et al. , ), as well as that of Li and Zhang (), revealed that the distribution range of the Chinese cork oak may shrink and retreat under the expected climate warming. However, the growth response at their range limit is not yet understood.…”

Section: Introductionmentioning

confidence: 81%

“…Previous studies demonstrated that temperate and boreal tree species presented a growth increase toward the northern parts of the species range limits in the Northern Hemisphere (Jump , Sánchez‐Salguero et al , Gao et al. , ). However, there are still research gaps on how rising temperatures will affect tree growth under projected climatic conditions, especially the southern range limit in semiarid area.…”

Section: Introductionmentioning

confidence: 97%

Radial growth response of two oaks to climate at their disparate distribution limits in semiarid areas, Beijing, China

Gao

Lei

et al. 2020

Ecosphere

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Impending climate warming is expected to influence plant growth and distribution, and the distribution range limit of tree species is extremely sensitive to climate change. However, synchronous comparisons of responses of different tree species with overlapping ecological niches to climate at their distribution range limit in the same region have received little attention. In the present study, we assessed the discrepancy in radial growth responses of two dominant oak species to climate at their distribution range limit (southern range limit for Quercus mongolica, northern range limit for Quercus variabilis) in Beijing, China. Furthermore, growth–climate relationships were examined using linear mixed‐effects models, and growth trends up to the year 2100 were forecast based on future climate scenarios (RCP2.6 and RCP8.5). Our results indicated that there were no significant differences in the growth response to climate between Q. variabilis at its northern limit and Q. mongolica at its southern limit, and the growth of the two tree species was positively correlated with the minimum temperature and negatively correlated with the climatic moisture deficit of autumn. However, the growth response to climate variables varied at different sites. Additionally, the model forecast showed an increase in radial growth of Q. variabilis at its northern limit and Q. mongolica at its southern limit up to the end of the present century.

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Population structure and regeneration dynamics ofQuercus variabilisalong latitudinal and longitudinal gradients

Cited by 24 publications

References 91 publications

The Concentration of Non-structural Carbohydrates, N, and P in Quercus variabilis Does Not Decline Toward Its Northernmost Distribution Range Along a 1500 km Transect in China

The Concentration of Non-structural Carbohydrates, N, and P in Quercus variabilis Does Not Decline Toward Its Northernmost Distribution Range Along a 1500 km Transect in China

Population structure and regeneration status of rhododendrons in temperate mixed broad-leaved forests of western Arunachal Pradesh, India

Radial growth response of two oaks to climate at their disparate distribution limits in semiarid areas, Beijing, China

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