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19 results on '"Lei, Jingpin"'

2. Study on the Constraint Effect of Vegetation on Ecosystem Services in the Yellow River Basin.

Author

Gong, Jinyu, Ma, Zhiyuan, Hu, Chen, He, Linxuan, and Lei, Jingpin

Subjects
ECOSYSTEM services, RESTORATION ecology, ECOLOGICAL engineering, WATERSHEDS, SOIL conservation
Abstract

Ecosystem services (ESs) serve as the foundation for sustaining human life and development, with vegetation status playing a crucial role in influencing the supply of these services. This study focuses on the Yellow River Basin (YRB), where we quantitatively examined the main ESs indicators from 2010 to 2020. We explored the trends in fractional vegetation cover (FVC) and ESs, as well as the constraint relationship between FVC and total ecosystem services (TES). The findings are as follows. (1) From 2010 to 2020, FVC, landscape aesthetics (LA), soil conservation (SC), food production (FP), and TES in the YRB demonstrated an upward trend, whereas water yield (WY) exhibited a downward trend. (2) A constraint relationship exists between FVC and LA, SC, WY, and TES, with the constraint line taking on a hump-like shape. (3) The threshold value of the constraint line between FVC and LA, SC, WY, and TES are approximately 80%. Below this value, FVC does not impose a constraint effect on LA, SC, WY, and TES, but above 80%, a strong constraint effect emerges, leading to a reduction in LA, SC, WY, and TES. These results offer a valuable data reference for guiding future vegetation restoration and ecological engineering efforts in the region. [ABSTRACT FROM AUTHOR]

Published
2024
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4. Active summer carbon storage for winter persistence in trees at the cold alpine treeline

Author

Li, Mai-He, Jiang, Yong, Wang, Ao, Li, Xiaobin, Zhu, Wanze, Yan, Cai-Feng, Du, Zhong, Shi, Zheng, Lei, Jingpin, Schönbeck, Leonie, He, Peng, Yu, Fei-Hai, Wang, Xue, and Millard, Peter

Abstract

The low-temperature limited alpine treeline is one of the most obvious boundaries in mountain landscapes. The question of whether resource limitation is the physiological mechanism for the formation of the alpine treeline is still waiting for conclusive evidence and answers. We therefore examined non-structural carbohydrates (NSC) and nitrogen (N) in treeline trees (TATs) and low-elevation trees (LETs) in both summer and winter in 11 alpine treeline cases ranging from subtropical monsoon to temperate continental climates across Eurasia. We found that tissue N concentration did not decrease with increasing elevation at the individual treeline level, but the mean root N concentration was lower in TATs than in LETs across treelines in summer. The TATs did not have lower tissue NSC concentrations than LETs in summer. However, the present study with multiple tree species across a large geographical scale, for the first time, revealed a common phenomenon that TATs had significantly lower NSC concentration in roots but not in the aboveground tissues than LETs in winter. Compared with LETs, TATs exhibited both a passive NSC storage in aboveground tissues in excess of carbon demand and an active starch storage in roots at the expense of growth reduction during the growing season. This starch accumulation disappeared in winter. Our results highlight some important aspects of the N and carbon physiology in relation to season in trees at their upper limits. Whether or to what extent the disadvantages of winter root NSC and summer root N level of TATs affect the growth of treeline trees and the alpine treeline formation needs to be further studied.

Published
2021

12. Responses and acclimation of Chinese cork oak (Quercus variabilis Bl.) to metal stress: the inducible antimony tolerance in oak trees

Author

Zhao, Xiulian, primary, Zheng, Lingyu, additional, Xia, Xinli, additional, Yin, Weilun, additional, Lei, Jingpin, additional, Shi, Shengqing, additional, Shi, Xiang, additional, Li, Huiqing, additional, Li, Qinghe, additional, Wei, Yuan, additional, Chang, Ermei, additional, Jiang, Zeping, additional, and Liu, Jianfeng, additional

Published
2015
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17. Rates of Litter Decomposition and Soil Respiration in Relation to Soil Temperature and Water in Different-Aged Pinus massoniana Forests in the Three Gorges Reservoir Area, China.

Author

Xiao, Wenfa, Ge, Xiaogai, Zeng, Lixiong, Huang, Zhilin, Lei, Jingpin, Zhou, Benzhi, and Li, Maihe

Subjects
FOREST litter decomposition, CHEMICAL decomposition, SOIL respiration, SOIL temperature, PINE, FORESTS & forestry
Abstract

To better understand the soil carbon dynamics and cycling in terrestrial ecosystems in response to environmental changes, we studied soil respiration, litter decomposition, and their relations to soil temperature and soil water content for 18-months (Aug. 2010–Jan. 2012) in three different-aged Pinus massoniana forests in the Three Gorges Reservoir Area, China. Across the experimental period, the mean total soil respiration and litter respiration were 1.94 and 0.81, 2.00 and 0.60, 2.19 and 0.71 µmol CO2 m−2 s−1, and the litter dry mass remaining was 57.6%, 56.2% and 61.3% in the 20-, 30-, and 46-year-old forests, respectively. We found that the temporal variations of soil respiration and litter decomposition rates can be well explained by soil temperature at 5 cm depth. Both the total soil respiration and litter respiration were significantly positively correlated with the litter decomposition rates. The mean contribution of the litter respiration to the total soil respiration was 31.0%–45.9% for the three different-aged forests. The present study found that the total soil respiration was not significantly affected by forest age when P. masonniana stands exceed a certain age (e.g. >20 years old), but it increased significantly with increased soil temperature. Hence, forest management strategies need to protect the understory vegetation to limit soil warming, in order to reduce the CO2 emission under the currently rapid global warming. The contribution of litter decomposition to the total soil respiration varies across spatial and temporal scales. This indicates the need for separate consideration of soil and litter respiration when assessing the climate impacts on forest carbon cycling. [ABSTRACT FROM AUTHOR]

Published
2014
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18. The Link Between Litterfall, Substrate Quality, Decomposition Rate, and Soil Nutrient Supply in 30-Year-Old Pinus massonianaForests in the Three Gorges Reservoir Area, China

Author

Ge, Xiaogai, Xiao, Wenfa, Zeng, Lixiong, Huang, Zhilin, Lei, Jingpin, and Li, Mai-He

Abstract

Little is known about whether soil nutrient supply is determined by decomposition rate or litterfall in Pinus massonianaforests. The present study quantified the relationships between litterfall, litter substrate quality, decomposition rate, and soil nutrients to elucidate the contribution of litter to soil nutrient supply in these forests. Twelve 1 × 1–m litterfall collectors (collected monthly) and 108 decomposition bags, 20 × 20 cm (collected every 3 months) in size, were placed in three 30-year-old P. massonianastands in the Three Gorges Reservoir Area, from August 2010 to January 2011. The accumulation of soil nutrients depended on the relationship of litterfall, substrate quality, and decomposition rate. Soil organic matter content was significantly positively correlated with litterfall and litter substrate quality dynamic (both P< 0.01) (N, P, and CN ratio). Litter decomposition rate was positively correlated with litter initial N concentration (R2= 0.82, P= 0.01) but negatively correlated with initial P (R2= 0.67, P= 0.045) and CN ratio (R2= 0.90, P= 0.00). Litter decomposition rate was negatively correlated with soil organic matter content (P= 0.02), total soil N (P< 0.001), and soil available P (P< 0.001), indicating that litter decomposition was faster in nutrient-poor than in nutrient-rich soils, which may function as a mechanism for increasing the nutrient use efficiency in P. massonianaforest ecosystems. Litter nutrient return through decomposition plays a more important role than the other litter parameters studied in determining soil nutrient supply in the P. massonianaforest ecosystem. Forest management practices need to create conditions that favor the litter decomposition to improve the site conditions and growth rate of the P. massonianatrees.

Published
2013
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19. Active summer carbon storage for winter persistence in trees at the cold alpine treeline

Author

Li, Mai-He, Jiang, Yong, Wang, Ao, Li, Xiaobin, Zhu, Wanze, Yan, Cai-Feng, Du, Zhong, Shi, Zheng, Lei, Jingpin, Schönbeck, Leonie, He, Peng, Yu, Fei-Hai, Wang, Xue, Millard, Peter, Li, Mai-He, Jiang, Yong, Wang, Ao, Li, Xiaobin, Zhu, Wanze, Yan, Cai-Feng, Du, Zhong, Shi, Zheng, Lei, Jingpin, Schönbeck, Leonie, He, Peng, Yu, Fei-Hai, Wang, Xue, and Millard, Peter

Abstract

The low-temperature limited alpine treeline is one of the most obvious boundaries in mountain landscapes. The question of whether resource limitation is the physiological mechanism for the formation of the alpine treeline is still waiting for conclusive evidence and answers. We therefore examined non-structural carbohydrates (NSC) and nitrogen (N) in treeline trees (TATs) and low-elevation trees (LETs) in both summer and winter in 11 alpine treeline cases ranging from subtropical monsoon to temperate continental climates across Eurasia. We found that tissue N concentration did not decrease with increasing elevation at the individual treeline level, but the mean root N concentration was lower in TATs than in LETs across treelines in summer. The TATs did not have lower tissue NSC concentrations than LETs in summer. However, the present study with multiple tree species across a large geographical scale, for the first time, revealed a common phenomenon that TATs had significantly lower NSC concentration in roots but not in the aboveground tissues than LETs in winter. Compared with LETs, TATs exhibited both a passive NSC storage in aboveground tissues in excess of carbon demand and an active starch storage in roots at the expense of growth reduction during the growing season. This starch accumulation disappeared in winter. Our results highlight some important aspects of the N and carbon physiology in relation to season in trees at their upper limits. Whether or to what extent the disadvantages of winter root NSC and summer root N level of TATs affect the growth of treeline trees and the alpine treeline formation needs to be further studied.

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