Liang Song

Xishuangbanna Tropical Botanical Garden

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Wenyao Liu

Xishuangbanna Tropical Botanical Garden

Hua‐Zheng Lu

Xishuangbanna Tropical Botanical Garden

Su Li

Chinese Academy of Sciences

Xian‐Meng Shi

Xishuangbanna Tropical Botanical Garden

Ting Shen

Chinese Academy of Sciences

Chuansheng Wu

Fuyang Normal University

Wen Zhang

Jiangxi Academy of Agricultural Sciences

Y N Mo

University of Chinese Academy of Sciences

Sissou Zakari

Université de Parakou

Yong‐Jiang Zhang

University of Maine

Cooperative Institutions

Chinese Academy of Sciences

199

Xishuangbanna Tropical Botanical Garden

122

University of Chinese Academy of Sciences

110

Suzhou Institute of Nano-tech and Nano-bionics

Hainan University

Yunnan University

Beijing Botanical Garden

University of Science and Technology of China

Peking University

Jingdong (China)

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Effects of lianas on forest biogeochemistry during their lives and afterlives

Global Change Biology (2024)

Gbadamassi G. O. Dossa Honglin Li Bo Pan Tial C. Ling Douglas Schaefer

Abstract Climate change and other anthropogenic disturbances are increasing liana abundance and biomass in many tropical and subtropical forests. While the effects of living lianas on species diversity, ecosystem carbon, and nutrient dynamics are receiving increasing attention, the role of dead lianas in forest ecosystems has been little studied and is poorly understood. Trees and lianas coexist as the major woody components of forests worldwide, but they have very different ecological strategies, with lianas relying on trees for mechanical support. Consequently, trees and lianas have evolved highly divergent stem, leaf, and root traits. Here we show that this trait divergence is likely to persist after death, into the afterlives of these organs, leading to divergent effects on forest biogeochemistry. We introduce a conceptual framework combining horizontal, vertical, and time dimensions for the effects of liana proliferation and liana tissue decomposition on ecosystem carbon and nutrient cycling. We propose a series of empirical studies comparing traits between lianas and trees to answer questions concerning the influence of trait afterlives on the decomposability of liana and tree organs. Such studies will increase our understanding of the contribution of lianas to terrestrial biogeochemical cycling, and help predict the effects of their increasing abundance.

Liana

Biogeochemistry

Terrestrial ecosystem

Forest dynamics

10.1111/gcb.17274

Cite

Citations (0)

Studies on High-Voltage GaN-on-Si MIS-HEMTs Using LPCVD Si₃N₄as Gate Dielectric and Passivation Layer

IEEE Transactions on Electron Devices (2016)

Zhili Zhang Guohao Yu Xiaodong Zhang Xuguang Deng Shuiming Li

This paper investigates the performance of AlGaN/gallium nitride (GaN) MIS high electron mobility transistors (MIS-HEMTs). The gate dielectric layer and the surface passivation layer are formed by the low-pressure chemical vapor deposition (LPCVD) Si ₃ N ₄ . The LPCVD-Si ₃ N ₄ MIS-HEMTs exhibit a high breakdown voltage (BV) of 1162 V at I _DS = 1 μA/mm, a low OFF-state leakage of 7.7 × 10 ^-12 A/mm, and an excellent ON/OFF-current ratio of ~10 ¹¹ . Compared with the static ON-resistance of 2.88 mΩ · cm ² , the dynamic ON-resistance after high OFF-state drain bias stress at 600 V only increases to 4.89 mΩ · cm ² . The power device figure of merit = BV ² /R _ON.sp is calculated to be 469 MW · cm ^-2 . The LPCVD-Si ₃ N ₄ /GaN interface state density is in the range of (1.4-5.3) × 10 ¹³ eV ^-1 cm ^-2 extracted by the conventional conductance method. Finally, the gate insulator degradation of GaN-based MIS-HEMTs is analyzed by time-dependent dielectric breakdown test. The lifetime is extrapolated to 0.01% of failures after ten years at 300 K by fitting the data with a power law to a gate voltage of 10.1 V.

Passivation

10.1109/ted.2015.2510445

Cite

Citations (106)

Adaptation of epiphytic bryophytes in the understorey attributing to the correlations and trade-offs between functional traits

Journal of Bryology (2016)

Xi Chen Wenyao Liu Liang Song Su Li Chuansheng Wu

This study explores adaptive strategies of epiphytic bryophytes in the understorey by investigating the photosynthetic characteristics, pigment concentrations and nutrient stoichiometry, as well as other functional traits of three trunk-dwelling bryophytes in a subtropical montane cloud forest in SW China. The results showed that their light-saturated net photosynthetic rate (Anmax−L), light saturation point (Isat), light compensation point (Ic) and dark respiration rate (Rd) were ca 0.55, 106.72, 4.17 and 0.25 μmol m−2 s−1, respectively. Furthermore, the samples demonstrated photosynthetic down-regulation under high irradiance. These photosynthetic characteristics can be explained by higher total chlorophyll concentrations, specific leaf area, chlorophyll per unit leaf N (Chl/N), lower ratio of chlorophyll a to chlorophyll b (Chl a/b) and photosynthetic nitrogen-use efficiency. We suggest that the bryophytes adapted to the shaded understorey microhabitats through a series of correlations and trade-offs between functional traits.

Understory

Epiphyte

Compensation point

Shade tolerance

Respiration rate

Specific leaf area

Photosynthetic capacity

10.1080/03736687.2015.1120370

Cite

Citations (9)

Biodiversity and carbon stocks of the understory vegetation as indicators for forest health in the Zabarwan Mountain Range, Indian Western Himalaya

Ecological Indicators (2024)

Shiekh Marifatul Haq Muhammad Waheed M.A. Darwish Manzer H. Siddiqui Umer Hafeez Goursi

Carbon stock and diversity of species together address the two most pressing concerns for successful ecosystem functioning and management, namely climate change and biodiversity loss. Understory vegetation is a significant indicator of plant biodiversity, contributing to forest carbon storage, sustaining species, and providing many ecological services. However, little research has been done about the contribution of the understory carbon stock in the forests, most likely because these understory components only make up a small portion of the total carbon stock of the forest ecosystem. To fill this knowledge gap, the current study sought to study the baseline understory (shrub and herb) diversity and carbon stock from the Zabarwan Mountain Range. Data on the characteristics of the understory vegetation in five different forest types were gathered using a random sample method. Using the Pearson method, we calculated the correlation coefficient between the diversity parameters and the carbon stock. The calculated average total carbon stock in the understory was determined to be 3.93 Mg C/ha (1.55–9.2 Mg C/ha). The shrub layer contributed a maximum value of 82 % of carbon stock. The increasing trends in total understory carbon were Parrotiopsis forest < Broad-leaved forest < Oak forest < Acacia forest < and Pinus forest. Species-wise, the shrub Parrotiopsis jacquemontiana was found to contribute a maximum average carbon stock of 3.11 Mg C/ha (47.76 %) and can be regarded as a key indicator understory species for the restoration of Himalayan forests. The decreasing order of trends in Shannon–Wiener diversity index value in the study area was Oak forest > Broad-leaved forest > Acacia forest > Pinus forest > Parrotiopsis forest. Overall, the data show that coniferous-dominated woodlands had higher understory carbon stocks than other kinds of woodlands. The data acquired highlights the importance of shrub carbon stock storage in the understory layer in this Himalayan region. The current research on understory vegetation provides strong evidence for maintaining forest management practices that enable and encourage the planting of multiple layers of vegetation in landscape restoration as approaches to improve biodiversity while increasing resistance to climate change.

Understory

Diversity index

10.1016/j.ecolind.2024.111685

Cite

Citations (14)

Combining critical transition indicator to compare the stable structure of epiphyte–host networks

Ecological Indicators (2024)

Hai‐Xia Hu Y N Mo Sujan Balami Glenda Mendieta‐Leiva Ting Shen

Networks have been widely used to describe a range of biotic interactions in ecosystems; topological indicators of ecological networks provide systematic way to characterize patterns of different interacting systems. However, it is hampered by sampling bias and detecting the true structures to compare the stability of ecological communities. In this context, we aimed to employ innovative approach of identifying critical transition indicator to compare stable network structure by simulating dynamics of network assembly. Four epiphyte–host networks were compiled, including two groups (epiphytic bryophyte and epiphytic vascular plant) of tropical rainforest (TRF) and subtropical forest (STF). The dynamics of three structure indictors, i.e. connectance, nestedness and modularity were simulated to explore what changes occurred as sampling effort increases. The critical transition indicator was detected to compare the structure of four networks at a stable state. Meanwhile, the variation dynamics of host size and epiphyte richness were fitted to analyze the underlying processes shaping the stable network structure. Using a dynamic simulation, the network structures showed the critical transition to stable state when sampling size approximated 30 hosts for epiphytic bryophytes and 100 hosts for epiphytic vascular plants. After critical transition, connectance and nestedness were higher in the STF than in the TRF. In contrast, modularity was higher in the TRF than in the STF. The coefficient of variations (CV) of host size and epiphyte richness tended to be stable at the same critical transition point; the distribution of host size and epiphyte richness could be the fundamental factors for the assembly of stable epiphyte–host network. Our study emphasized the importance of considering sampling effort while evaluating the network structure. Combining critical transition indicator with structure indicator dynamics could be a powerful method to compare the stable structure of different ecological networks.

Epiphyte

10.1016/j.ecolind.2024.112470

Cite

Citations (0)

Studies on forest ecosystem physiology: marginal water-use efficiency of a tropical, seasonal, evergreen forest in Thailand

Journal of Forestry Research (2018)

Mengping Chen Guan-Ze Wang Shuangxi Zhou Jun-Fu Zhao Xiang Zhang

Evergreen forest

Dry season

Wet season

Seasonality

10.1007/s11676-018-0804-5

Cite

Citations (5)

High-resistivity unintentionally carbon-doped GaN layers with nitrogen as nucleation layer carrier gas grown by metal-organic chemical vapor deposition

AIP Advances (2017)

Fu Chen Shichuang Sun Xuguang Deng Kai Fu Guohao Yu

In this letter, high-resistivity unintentionally carbon-doped GaN layers with sheet resistivity greater than 106 Ω/□ have been grown on c-plane sapphire substrates by metal-organic chemical vapor deposition (MOCVD). We have observed that the growth of GaN nucleation layers (NLs) under N2 ambient leads to a large full width at half maximum (FWHM) of (102) X-ray diffraction (XRD) line in the rocking curve about 1576 arc sec. Unintentional carbon incorporation can be observed in the secondary ion mass spectroscopy (SIMS) measurements. The results demonstrate the self-compensation mechanism is attributed to the increased density of edge-type threading dislocations and carbon impurities. The AlGaN/GaN HEMT grown on the high-resistivity GaN template has also been fabricated, exhibiting a maximum drain current of 478 mA/mm, a peak transconductance of 60.0 mS/mm, an ON/OFF ratio of 0.96×108 and a breakdown voltage of 621 V.

Carbon fibers

10.1063/1.4990099

Cite

Citations (10)

Monitoring and validating spatio-temporal continuously daily evapotranspiration and its components at river basin scale

AGU Fall Meeting Abstracts (2017)

Liang Song S. Liu William P. Kustas Héctor Nieto

Source

Cite

Citations (0)

Water relations and gas exchange of fan bryophytes and their adaptations to microhabitats in an Asian subtropical montane cloud forest

Journal of Plant Research (2015)

Liang Song Yong‐Jiang Zhang Xi Chen Su Li Hua‐Zheng Lu

Cloud forest

Understory

Compensation point

10.1007/s10265-015-0721-z

Cite

Citations (37)

Organic nitrogen uptake is a significant contributor to nitrogen economy of subtropical epiphytic bryophytes

Scientific Reports (2016)

Liang Song Hua‐Zheng Lu Xingliang Xu Su Li Xian‐Meng Shi

Abstract Without any root contact with the soil, epiphytic bryophytes must experience and explore poor, patchy, and heterogeneous habitats; while, the nitrogen (N) uptake and use strategies of these organisms remain uncharacterized, which obscures their roles in the N cycle. To investigate the N sources, N preferences, and responses to enhanced N deposition in epiphytic bryophytes, we carried out an in situ manipulation experiment via the 15 N labelling technique in an Asian cloud forest. Epiphytic bryophytes obtained more N from air deposition than from the bark, but the contribution of N from the bark was non-negligible. Glycine accounted for 28.4% to 44.5% of the total N in bryophyte tissue, which implies that organic N might serve as an important N source. Increased N deposition increased the total N uptake, but did not alter the N preference of the epiphytic bryophytes. This study provides sound evidence that epiphytic bryophytes could take up N from the bark and wet deposition in both organic and inorganic N forms. It is thus important to consider organic N and bark N sources, which were usually neglected, when estimating the role of epiphytic bryophytes in N cycling and the impacts of N deposition on epiphytic bryophytes in cloud forests.

Epiphyte

Bryophyte

Cloud forest

Deposition

Nitrogen Cycle

10.1038/srep30408

Cite

Citations (34)