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  1. Article ; Online: Nutrient allocation patterns of Picea crassifolia on the eastern margin of the Qinghai-Tibet Plateau.

    Wu, Jingjing / Jiao, Liang / Che, Xichen / Zhu, Xuli / Yuan, Xin

    International journal of biometeorology

    2024  Volume 68, Issue 6, Page(s) 1155–1167

    Abstract: It can provide a basis for decision making for the conservation and sustainable use of forest ecosystems in mountains to understand the stoichiometric properties and nutrient allocation strategies of major tree species. However, the plant nutrient ... ...

    Abstract It can provide a basis for decision making for the conservation and sustainable use of forest ecosystems in mountains to understand the stoichiometric properties and nutrient allocation strategies of major tree species. However, the plant nutrient allocation strategies under different environmental gradients in forest systems of arid and semi-arid mountains are not fully understand. Therefore, three typical regions in the Qilian Mountains on the eastern edge of the Qinghai-Tibet Plateau were selected based on precipitation and temperature gradients, and the stoichiometric characteristics and nutrient allocation strategies of Qinghai spruce (Picea crassifolia) of the dominant tree species under different environmental gradients were investigated. The results showed that (1) the stoichiometric characteristics of plant tissues were different in the three regions. (2) The importance of each tissue in the plant nutrient allocation varied in different regions, showing that the plant roots are more important in the warm-wet region, while the plant leaves, branches and trunks are more important in the transition and hot-dry regions. (3) The influencing factors affecting plant nutrient allocation strategies were inconsistent across regions, which showed that plant nutrient allocation strategies in the warm-wet and transition region were mainly influenced by soil factors, while they were more influenced by climatic factors in the hot-dry region. The patterns of plant nutrient allocation strategies and drivers under different environmental gradients could help us better understand the ecological adaptation mechanism and physiological adjustment mechanism of forest ecosystem in mountains.
    MeSH term(s) Picea/metabolism ; Tibet ; Plant Leaves/metabolism ; Plant Leaves/chemistry ; Temperature ; Plant Roots/metabolism ; Soil/chemistry ; China ; Nitrogen/analysis ; Nitrogen/metabolism ; Nutrients/analysis ; Nutrients/metabolism ; Rain ; Climate ; Plant Stems/metabolism ; Plant Stems/chemistry
    Language English
    Publishing date 2024-03-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 280324-0
    ISSN 1432-1254 ; 0020-7128
    ISSN (online) 1432-1254
    ISSN 0020-7128
    DOI 10.1007/s00484-024-02655-z
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 998: Show issues Location:
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  2. Article ; Online: Conservation of aged paper using reduced cellulose nanofibrils/aminopropyltriethoxysilane modified CaCO

    Li, Shan / Tang, Jiayun / Jiang, Lihua / Jiao, Liang

    International journal of biological macromolecules

    2023  Volume 255, Page(s) 128254

    Abstract: Deacidification and strengthening play pivotal roles in the enduring conservation of aged paper. In this study, we innovatively propose the use of reduced cellulose nanofibrils (rCNFs) and aminopropyltriethoxysilane modified ... ...

    Abstract Deacidification and strengthening play pivotal roles in the enduring conservation of aged paper. In this study, we innovatively propose the use of reduced cellulose nanofibrils (rCNFs) and aminopropyltriethoxysilane modified CaCO
    MeSH term(s) Cellulose/chemistry ; Nanofibers/chemistry ; Tensile Strength ; Propylamines
    Chemical Substances Cellulose (9004-34-6) ; amino-propyl-triethoxysilane (L8S6UBW552) ; Propylamines
    Language English
    Publishing date 2023-11-21
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2023.128254
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    Zs.B 2374: Show issues Location:
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  3. Article ; Online: Pollution and source-specific risk analysis of potentially toxic metals in urban soils of an oasis-tourist city in northwest China.

    Li, Jun / Liu, Jun-Zhuo / Tai, Xi-Sheng / Jiao, Liang / Zhang, Ming / Zang, Fei

    Environmental geochemistry and health

    2024  Volume 46, Issue 2, Page(s) 55

    Abstract: Source-specific risk apportionment for soil potentially toxic metals (PTMs) is of great significance for contamination prevention and risk management in urban environments. Eighty-five urban soil samples were obtained from an oasis-tourist city, China ... ...

    Abstract Source-specific risk apportionment for soil potentially toxic metals (PTMs) is of great significance for contamination prevention and risk management in urban environments. Eighty-five urban soil samples were obtained from an oasis-tourist city, China and examined for eight PTMs (As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn). The pollution levels, sources, and ecological risk of soil PTMs were quantified, and their source-specific ecological and human health effects were also estimated using the multi-proxy approaches. The results demonstrated that accumulation of Cd, Hg, Pb, Cr, Cu, and Zn in soils was observed compared to their background levels, and the soils experienced varying degrees of PTMs pollution, especially at sites with high-intensity anthropogenic activities. Natural sources, atmospheric deposition, industrial sources, vehicular emissions, and comprehensive inputs were the principal sources, with contributions of 29.28%, 25.86%, 20.13%, 16.50%, and 8.23%, respectively. The integrated ecological risks of PTMs in soils were moderate at most sites, with atmospheric deposition being the dominant contributor to ecological risks. Children exhibited pronounced non-cancer risks, but adults had no notable non-cancer risks. Moreover, there were potential carcinogenic risks for both children and adults within the study region. Non-cancer and carcinogenic risks were more significant for children than adults, and traffic emissions were the primary contributor to non-cancer risks (adults: 20.53%, children: 20.49%) and carcinogenic risks (adults: 22.95%, children: 22.08%). The industrial and traffic activities were considered as priority control sources for soil pollution control and risk management, with Hg, Cd, Zn, and Pb corresponding to the priority elements. This study highlights the source-specific ecological and human health effects of PTMs pollution in urban soils, thereby providing valuable information for targeted pollution control and priority source management.
    MeSH term(s) Adult ; Child ; Humans ; Cadmium ; Lead ; Carcinogenesis ; Carcinogens ; China ; Environmental Pollution ; Mercury ; Soil ; Risk Assessment
    Chemical Substances Cadmium (00BH33GNGH) ; Lead (2P299V784P) ; Carcinogens ; Mercury (FXS1BY2PGL) ; Soil
    Language English
    Publishing date 2024-01-23
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 52039-1
    ISSN 1573-2983 ; 0142-7245 ; 0269-4042
    ISSN (online) 1573-2983
    ISSN 0142-7245 ; 0269-4042
    DOI 10.1007/s10653-023-01850-y
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4723: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (2.OG)
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  4. Article ; Online: Wet events increase tree growth recovery after different drought intensities.

    Zhang, Peng / Jiao, Liang / Xue, Ruhong / Wei, Mengyuan / Wang, Xuge / Li, Qian

    The Science of the total environment

    2024  Volume 924, Page(s) 171595

    Abstract: Understanding the dynamics of tree recovery after drought is critical for predicting the state of tree growth in the context of future climate change. While there has been a great deal of researches showing that drought events can cause numerous ... ...

    Abstract Understanding the dynamics of tree recovery after drought is critical for predicting the state of tree growth in the context of future climate change. While there has been a great deal of researches showing that drought events can cause numerous significant negative effects on tree growth, the positive effects of post-drought wetting events on tree growth remain unclear. Therefore, we analyzed the effect of wet and dry events on the radial growth of trees in Central Asia using data on the width of tree rings. The results showed that 1) Drought is the main limiting factor for radial growth of trees in Central Asia, and that as the intensity and sensitivity of drought increases, tree resistance decreases and recovery rises, and more frequent droughts reduce tree resistance. 2) Tree radial growth varied significantly with wet and dry conditions, with wet events before and after drought events significantly enhancing tree radial growth. 3) When drought is followed by a wetting event, the relationship between tree resistance and recovery is closer to the "line of full resilience", with a significant increase in recovery, and compensatory growth is more likely to occur. Thus, wetting events have a significant positive effect on tree radial growth and are a key factor in rapid tree growth recovery after drought.
    MeSH term(s) Droughts ; Climate Change ; Forests
    Language English
    Publishing date 2024-03-14
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2024.171595
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
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  5. Article: Ecological adaptation strategies of the clonal plant Phragmites australis at the Dunhuang Yangguan wetland in the arid zone of northwest China

    Qin, Huijun / Jiao, Liang / Li, Fang / Zhou, Yi

    Ecological indicators. 2022 Aug., v. 141

    2022  

    Abstract: The adaptation strategies of plants are the key scientific issues for studying the mechanism of community formation and restoration of wetland vegetation in arid areas. But there are still unclear areas in the research on the adaptability of Phragmites ... ...

    Abstract The adaptation strategies of plants are the key scientific issues for studying the mechanism of community formation and restoration of wetland vegetation in arid areas. But there are still unclear areas in the research on the adaptability of Phragmites australis. We studied the differences in physiological, morphological and behavior adaptation of clonal plant P. australis in high, medium and low coverage areas and their driving forces in Inland river wetland of Dunhuang Yangguan, China. The results showed that: 1) Non-structural carbohydrates and starch concentration gradually decreased, while the content of soluble sugar concentration gradually increased during the process from high coverage to low coverage. 2) The stem diameter, node number, and tiller number showed the obvious downward trends, while rhizome internode length, spacer length and branch angle showed the obvious upward trends. 3) From the high coverage area to the low coverage area, the spatial distribution pattern changed from mainly clustered distribution to random distribution, and the clustering intensity significantly decreased (p < 0.05). 4) Driving force research showed that soil water content was significantly positively correlated with starch concentration, stem diameter, node number, tiller number, and aggregation intensity (p < 0.05), and soil water content was negatively correlated with spacer length and branch angle (p < 0.05), but soil salt content was the opposite of soil water content. The physiological, morphological, and behavioral adaptation indicators of P. australis have all changed under different gradients, and more attention should be paid to artificially strengthening water management.
    Keywords Phragmites australis ; arid zones ; internode length ; rhizomes ; rivers ; salt content ; soil salts ; soil water content ; starch ; sugars ; vegetation ; water management ; wetlands ; China
    Language English
    Dates of publication 2022-08
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 2036774-0
    ISSN 1872-7034 ; 1470-160X
    ISSN (online) 1872-7034
    ISSN 1470-160X
    DOI 10.1016/j.ecolind.2022.109109
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    In stock of ZB MED Bonn / Germany

    Z 7436: Show issues

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  6. Article: Radial Growth of Picea schrenkiana Influenced by Increasing Temperature in the Tianshan Mountains

    Jiang, Yuan / Yuan, Shuai / Jiao, Liang

    Tree-ring research. 2022 July 27, v. 78, no. 2

    2022  

    Abstract: There is a tendency of warming and wetting in northwestern China in recent decades. However, less is known about whether or not tree growth shows an increasing trend. In this study, we developed three tree-ring width chronologies of Picea schrenkiana in ... ...

    Abstract There is a tendency of warming and wetting in northwestern China in recent decades. However, less is known about whether or not tree growth shows an increasing trend. In this study, we developed three tree-ring width chronologies of Picea schrenkiana in the northern Tianshan Mountains to assess changes in the radial growth of P. schrenkiana and to discuss the stability of the relationships between tree growth and climate. Three chronologies all showed that the tree-ring index has declined significantly since the 1960s. At two western sites, the growth of P. schrenkiana was negatively affected by the summer temperature of the previous year. At the eastern site, early summer temperature-induced drought of the current year was the key factor affecting tree growth. The result of moving-window correlations was consistent with correlation analyses. Spatial correlation analyses revealed that variations in tree-ring width could respond to a wide range of temperature changes in northwestern China, especially in the past half century. We expect that climate warming hinders the radial growth of P. schrenkiana in the northern Tianshan Mountains. Our study also helps to clarify the characteristics of tree growth in northwestern China under the influence of westerlies.
    Keywords Picea schrenkiana ; climate ; drought ; growth rings ; research ; summer ; temperature ; tree growth ; China
    Language English
    Dates of publication 2022-0727
    Size p. 90-99.
    Publishing place Tree-Ring Society
    Document type Article
    ZDB-ID 2456648-2
    ISSN 1536-1098
    ISSN 1536-1098
    DOI 10.3959/TRR2021-13
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  7. Article: Dynamic response to climate change in the radial growth of Picea schrenkiana in western Tien Shan, China

    Jiao, Liang / Wang, Shengjie / Chen, Ke / Liu, Xiaoping

    Journal of forestry research. 2022 Feb., v. 33, no. 1

    2022  

    Abstract: Forests are important ecosystems for economic and social development. However, the response of tree radial growth to climate has produced ‘divergent problems’ at high latitudes under global warming. In this study, the response stability and trend of ... ...

    Abstract Forests are important ecosystems for economic and social development. However, the response of tree radial growth to climate has produced ‘divergent problems’ at high latitudes under global warming. In this study, the response stability and trend of Picea schrenkiana radial growth to variability in climate factors were analyzed in the mid-latitudes of the western Tien Shan Mountains. Radial growth of P. schrenkiana was mainly limited by minimum and mean temperatures. The divergent responses of radial growth occurred in response to the minimum and mean temperatures at the beginning of the growing season (April–May) of the current year, but responses to drought occurred in July–September of the previous year. And the mean and minimum temperatures in June–September of the current year were both stable. Radial growth first increased and then decreased according to the basal area increment, with a gradual increase in temperature. Therefore, forest ecosystems in mountainous arid areas will be increasingly affected by future climate warming.
    Keywords Picea schrenkiana ; drought ; forestry ; forests ; latitude ; mountains ; research ; temperature ; trees ; China
    Language English
    Dates of publication 2022-02
    Size p. 147-157.
    Publishing place Springer Singapore
    Document type Article
    ZDB-ID 2299615-1
    ISSN 1993-0607 ; 1007-662X
    ISSN (online) 1993-0607
    ISSN 1007-662X
    DOI 10.1007/s11676-021-01336-6
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  8. Article ; Online: Spatial characteristics of nutrient allocation for Picea crassifolia in soil and plants on the eastern margin of the Qinghai-Tibet Plateau.

    Wu, Jingjing / Jiao, Liang / Qin, Huijun / Che, Xichen / Zhu, Xuli

    BMC plant biology

    2023  Volume 23, Issue 1, Page(s) 199

    Abstract: Background: Understanding the stoichiometric characteristics and nutrient allocation strategies of dominant tree species in montane forest systems can provide a basis for decision-making in relation to montane system management. Therefore, according to ... ...

    Abstract Background: Understanding the stoichiometric characteristics and nutrient allocation strategies of dominant tree species in montane forest systems can provide a basis for decision-making in relation to montane system management. Therefore, according to precipitation and temperature gradients, we selected three typical areas in the Qilian Mountains on the eastern margin of the Qinghai-Tibet Plateau to analyse the spatial relations of plant-soil stoichiometric characteristics and nutrient allocation strategies of plant tissues for Qinghai spruce (Picea crassifolia) along different environmental gradients.
    Results: 1) The plant and soil stoichiometric characteristics had similar spatial patterns. The C content of plants and soils tended to decrease with increasing latitude, and the N and P contents and the N:P ratio tended to increase with increasing latitude. 2) The stoichiometric characteristics of the plant tissues also interacted with each other and showed synergistic trade-offs. Nutrient allocation in the eastern section of the Qilian Mountains was similar to that in the western section, while more N and P in the plant stems were allocated to maintain plant growth in the relatively arid western Sect. 3) The nutrient allocation strategies in the plant tissues were mainly regulated by soil and climate.
    Conclusions: Information on plant-soil stoichiometric characteristics along different gradients can help us better understand the nutrient patterns and dynamics of forest ecosystems under arid and semiarid conditions at a wide geographic scale from the perspective of plant nutrient partitioning.
    MeSH term(s) Tibet ; Ecosystem ; Picea ; Soil ; Plants ; Nutrients ; China
    Chemical Substances Soil
    Language English
    Publishing date 2023-04-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 2059868-3
    ISSN 1471-2229 ; 1471-2229
    ISSN (online) 1471-2229
    ISSN 1471-2229
    DOI 10.1186/s12870-023-04214-x
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  9. Article ; Online: Spatial-Temporal Dynamics of Water Conservation in Gannan in the Upper Yellow River Basin of China

    Che, Xichen / Jiao, Liang / Zhu, Xuli / Wu, Ching-Ching / Li, Qian

    Land. 2023 July 12, v. 12, no. 7

    2023  

    Abstract: Water resources are the material basis for human social development. They play an essential role in human production and life. They are vital for the healthy growth of ecosystem services. The quantitative assessment of the water conservation (WC) ... ...

    Abstract Water resources are the material basis for human social development. They play an essential role in human production and life. They are vital for the healthy growth of ecosystem services. The quantitative assessment of the water conservation (WC) function is of great significance to the management of regional ecosystems and the construction of ecological civilization. Gannan is an influential water supply area in the upper Yellow River Basin. Understanding the current status and future changes of its WC function can provide scientific support for the stable use and sustainable development of water resources in the upper Yellow River Basin; its ecological status is highly important. The present study quantitatively assesses the WC function of Gannan based on the InVEST model. It aims to explore the regional ecological compensation mechanism, enhance regional ecological regulation capacity and increase water supply by studying the trend in changes in the WC function and the influence mechanism. The results show that: (1) The overall trend in WC capacity in Gannan increased during the period 2000–2020. (2) The spatial distribution of WC in Gannan varies from year to year, but there is some similarity, showing a high degree in the southwest and a low degree in the northeast. (3) Climatic factors are the dominant factors underlying the spatial and temporal distribution of WC in Gannan. (4) The important areas of WC are located in the southwest and southeast of Gannan.
    Keywords ecosystems ; humans ; land ; models ; sustainable development ; water conservation ; water supply ; watersheds ; China ; Yellow River
    Language English
    Dates of publication 2023-0712
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2682955-1
    ISSN 2073-445X
    ISSN 2073-445X
    DOI 10.3390/land12071394
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  10. Article ; Online: Ecological Adaptation of Two Dominant Conifer Species to Extreme Climate in the Tianshan Mountains

    Wu, Xuan / Jiao, Liang / Liu, Xiaoping / Xue, Ruhong / Qi, Changliang / Du, Dashi

    Forests. 2023 July 12, v. 14, no. 7

    2023  

    Abstract: With global warming, the frequency, intensity, and period of extreme climates in more areas will probably increase in the twenty first century. However, the impact of climate extremes on forest vulnerability and the mechanisms by which forests adapt to ... ...

    Abstract With global warming, the frequency, intensity, and period of extreme climates in more areas will probably increase in the twenty first century. However, the impact of climate extremes on forest vulnerability and the mechanisms by which forests adapt to climate extremes are not clear. The eastern Tianshan Mountains, set within the arid and dry region of Central Asia, is very sensitive to climate change. In this paper, the response of Picea schrenkiana and Larix sibirica to climate fluctuations and their stability were analyzed by Pearson’s correlation based on the observation of interannual change rates of climate indexes in different periods. Additionally, their ecological adaptability to future climate change was explored by regression analysis of climate factors and a selection of master control factors using the Lasso model. We found that the climate has undergone significant changes, especially the temperature, from 1958 to 2012. Around 1985, various extreme climate indexes had obvious abrupt changes. The research results suggested that: (1) the responses of the two tree species to extreme climate changed significantly after the change in temperature; (2) Schrenk spruce was more sensitive than Siberian larch to extreme climate change; and (3) the resistance of Siberian larch was higher than that of Schrenk spruce when faced with climate disturbance events. These results indicate that extreme climate changes will significantly interfere with the trees radial growth. At the same time, scientific management and maintenance measures are taken for different extreme weather events and different tree species.
    Keywords Larix sibirica ; Picea schrenkiana ; climate ; climate change ; conifers ; forests ; models ; regression analysis ; temperature ; trees ; weather ; Central Asia
    Language English
    Dates of publication 2023-0712
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2527081-3
    ISSN 1999-4907
    ISSN 1999-4907
    DOI 10.3390/f14071434
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