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Article ; Online: Widespread mismatch between satellite observed vegetation greenness and temperature isolines during 2000–2020 in China

Pengyi Zhang / Pengchao Zhang / Zhouyuan Li / Tianming Ma / Tianxiao Ma

Ecological Indicators, Vol 147, Iss , Pp 110018- (2023)

2023

Abstract: Warming is projected to increase the greenness of vegetation and lead to geographic shifts in vegetation isolines across China. However, it is unclear whether the shift of greenness isolines can keep pace with that of temperature isolines because ... ...

Abstract	Warming is projected to increase the greenness of vegetation and lead to geographic shifts in vegetation isolines across China. However, it is unclear whether the shift of greenness isolines can keep pace with that of temperature isolines because vegetation activity is always limited by resource availability and relatively slow acclimation mechanisms. In addition, how natural and anthropogenic factors affect this mismatch is poorly understood. Based on remote sensing observations over the last two decades (2000–2020), we systematically evaluated how vegetation greenness shifts respond to warming trends in China. The result showed a widespread mismatch between temperature and greenness. 74 % of the area showed isolines of greenness lag behind or move in the opposite direction to the isolines of temperature. We also found the temperature-greenness mismatch is strongly determined by elevation, slope, vegetation type, and human activity. The magnitude of the mismatch decreased inversely with slope and elevation but increased when human activity increased. The mean magnitude of mismatch between temperature and greenness in velocity was the greatest for deciduous forest (0.45 km/year), followed by grass, shrubs, and evergreen forest. This systematic analysis of the temperature-greenness mismatch has important implications for the sustainable management of vegetation under climate change. Our study underscored the importance of understanding the role of topography, vegetation, and human activity when studying the temperature-greenness mismatch.
Keywords	Climate warming ; Latitudinal shift ; Vegetation greenness ; Velocity ; Anthropogenic effects ; Ecology ; QH540-549.5
Subject code	910
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Dynamic Changes of Endogenous Hormones in Different Seasons of Idesia polycarpa Maxim

Song Huang / Wei Zheng / Yanmei Wang / Huiping Yan / Chenbo Zhou / Tianxiao Ma

Life, Vol 13, Iss 788, p

2023 Volume 788

Abstract: Idesia polycarpa Maxim is a native dioecious tree from East Asia cultivated for its fruits and as an ornamental plant throughout temperate regions. Given the economic potential, comparative studies on cultivated genotypes are of current interest. This ... ...

Abstract	Idesia polycarpa Maxim is a native dioecious tree from East Asia cultivated for its fruits and as an ornamental plant throughout temperate regions. Given the economic potential, comparative studies on cultivated genotypes are of current interest. This study aims to discover the dynamic changes and potential functions of endogenous hormones in I. polycarpa , as well as the differences in endogenous hormone contents in different growth stages among different I . polycarpa provenances. We used High-Performance Liquid Chromatography (HPLC) to measure and compare the levels of abscisic acid (ABA), indole-3-acetic acid (IAA), gibberellin A3 (GA3), and trans-Zeatin-riboside (tZR) in the leaves, flowers, and fruits of I. polycarpa from various provenances between April and October. Our findings indicated that changes in the ABA and GA3 content of plants from Jiyuan and Tokyo were minimal from April to October. However, the levels of these two hormones in Chengdu plants vary greatly at different stages of development. The peak of IAA content in the three plant materials occurred primarily during the early fruit stage and the fruit expansion stage. The concentration of tZR in the three plant materials varies greatly. Furthermore, we discovered that the contents of endogenous hormones in I . polycarpa leaves, flowers, and fruits from Chengdu provenances were slightly higher than those from Tokyo and Jiyuan provenances. The content of IAA was higher in male flowers than in female flowers, and the content of ABA, GA3, and tZR was higher in female flowers than in male flowers. According to the findings, the contents of these four endogenous hormones in I. polycarpa are primarily determined by the genetic characteristics of the trees and are less affected by cultivation conditions. The gender of I. polycarpa had a great influence on these four endogenous hormones. The findings of this study will provide a theoretical foundation and practical guidance for artificially regulating the flowering and fruiting of I. polycarpa .
Keywords	Idesia polycarpa ; abscisic acid (ABA) ; indole-3-acetic acid (IAA) ; gibberellinA3 (GA3) ; trans-Zeatin-riboside (tZR) ; High-Performance Liquid Chromatography (HPLC) ; Science ; Q
Subject code	580
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Wildfire affects boreal forest resilience through post-fire recruitment in Northeastern China

Bo Liu / Yu Liang / Hong S. He / Zhihua Liu / Tianxiao Ma / Mia M. Wu

Ecological Indicators, Vol 145, Iss , Pp 109705- (2022)

2022

Abstract: Climate change has increased the severity, frequency, and impact of fire disturbance on boreal forests worldwide. Unusual fire events can trigger a shift from needle-leaf dominated forests to broad-leaf dominated forests, altering the original succession ...

Abstract	Climate change has increased the severity, frequency, and impact of fire disturbance on boreal forests worldwide. Unusual fire events can trigger a shift from needle-leaf dominated forests to broad-leaf dominated forests, altering the original succession trajectory. Thus, it is necessary to identify how altered fire regimes affect boreal forest resilience or capacity to recover after fire disturbance. In this study, we used the post-fire tree recruitment density, the aboveground biomass, the understory shrub cover, and the herb cover as indicators of forest resilience. We explored the links between patterns of resilience and burn severity across topographic positions in two post-fire forests with different time since fire. We quantified how burn severity, time since fire, and topographic position affect resilience indicators related to post-fire overstory and understory recruitment in the Great Xing’an Mountains of Northeastern China. We found that burn severity and topographic position exhibited strong influences on post-fire overstory tree recruitment and aboveground biomass. Severe fire promoted deciduous needle-leaf tree (larch) recruitment in lowland sites by removing a thick organic layer. In contrast, severe fire promoted broad-leaf tree (birch and aspen) recruitment in south-facing upland sites with relatively warmer and drier microclimates. Therefore, severe fire disturbance may trigger a post-fire species shift from larch dominated forest to broad-leaf forest, especially in south-facing upland sties. We also found that the understory may be more resilient to high severity fire than the overstory, because severity had short-term effects on post-fire understory recruitment. Our study suggested that burn severity was a crucial factor that affects boreal forest resilience through substantially altering resilience indicators related to post-fire overstory tree recruitment.
Keywords	Boreal tree ; Fire regime ; Regeneration ; Severe fire ; Time since fire ; Understory ; Ecology ; QH540-549.5
Subject code	550
Language	English
Publishing date	2022-12-01T00:00:00Z
Publisher	Elsevier
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Kirner's deformity of the fifth finger: A case report.

Tianxiao, Ma / Wang, Dongyue / Song, Lihua

Medicine

2020 Volume 99, Issue 39, Page(s) e22294

Abstract: Rationale: Kirner's deformity is an uncommon deformity of finger, characterized by palmo-radial curvature of distal phalanx of the fifth finger. The specific mechanism remains unknown yet. This study aims to present a case report to add the knowledge on ...

Abstract	Rationale: Kirner's deformity is an uncommon deformity of finger, characterized by palmo-radial curvature of distal phalanx of the fifth finger. The specific mechanism remains unknown yet. This study aims to present a case report to add the knowledge on this type of deformity. Patient concerns: A 9-year-old girl presenting with deformity of her fifth finger since she was born was admitted to our hand surgery clinic. MRI findings showed widened epiphyseal plate, L-shaped physis, but normal flexor digitorum profundus tendon insertion, without any significantly enhanced soft issues. Diagnosis: Kirner's deformity of the fifth finger. Interventions: We presented 2 surgical choices for the patient: one was wedge osteotomy of the distal phalanx to correct the mechanical line of the distal phalanx and fixation with Kirschner wire and the other one was cut-off of deep flexor tendon insertion with brace immobilization, but her guardians refused either of them. Outcomes: Consecutive follow-up was performed for 19 months after the first visit, showing no any change in finger shape and function. Lessons: The L-shaped epiphyses may be the cause of Kirner's deformity and further attention should be paid on in the clinic. This case report provided a basis for the etiological diagnosis and future treatment of Kirner's deformity.
MeSH term(s)	Aftercare ; Bone Wires/standards ; Braces/standards ; Child ; Female ; Finger Phalanges/abnormalities ; Finger Phalanges/surgery ; Growth Plate/abnormalities ; Growth Plate/diagnostic imaging ; Hand Deformities, Congenital/diagnostic imaging ; Hand Deformities, Congenital/surgery ; Humans ; Magnetic Resonance Imaging/methods ; Osteotomy/instrumentation ; Osteotomy/methods ; Tendons/diagnostic imaging ; Tendons/surgery ; Treatment Refusal
Language	English
Publishing date	2020-09-28
Publishing country	United States
Document type	Case Reports ; Journal Article
ZDB-ID	80184-7
ISSN	1536-5964 ; 0025-7974
ISSN (online)	1536-5964
ISSN	0025-7974
DOI	10.1097/MD.0000000000022294
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Article ; Online: Neurosarcomatous amelanotic transformation of malignant melanoma presenting as malignant periopheral nerve sheath tumor: Rare case report.

Bofan, Lu / Xiaofei, Xiu / Jingwen, Zhang / Zuzhuo, Zhang / Tianxiao, Ma / Feng, Gao / Guochuan, Zhang / Zhou, Zhuang

Medicine

2023 Volume 102, Issue 25, Page(s) e34034

Abstract: Rationale: Malignant melanoma (MM) is notorious for its remarkable morphological variation and aberrant histopathological patterns. In addition, Malignant Periopheral Nerve Sheath Tumor (MPNST) is an uncommon but aggressive soft tissue sarcoma. Because ... ...

Abstract	Rationale: Malignant melanoma (MM) is notorious for its remarkable morphological variation and aberrant histopathological patterns. In addition, Malignant Periopheral Nerve Sheath Tumor (MPNST) is an uncommon but aggressive soft tissue sarcoma. Because of the common embryological origin of melanocytes and Schwann cells in the neural crest, discriminating between a particular type of MM and MPNST can be difficult, particularly when they are amelanotic. Our goal is to increase awareness among clinicians of the rare variations of MM and the importance of medical history in improving the accuracy of the final clinical diagnosis. Patient concerns: A 68-year-old man was admitted to the hospital due to pain in his right ankle, which had persisted for 8 months, along with swelling for 4 months. Medical history revealed delayed healing of right plantar for 5 years after a traumatic injury. Diagnoses: The ankle mass was initially diagnosed as MPNST through biopsy. After reviewing the patient's medical history and receiving the final pathological report following amputation, we have revised the diagnosis to metastatic amelanotic desmoplastic melanoma in the ankle part and lentigo maligna melanoma in the plantar part. This is due to both lesions displaying positive markers or mutated genes in immunohistology and Gene Mutation Detection, indicating homology between the 2 tumors. Interventions: Due to the malignant characteristics of the tumor and the patient's wishes, amputation of the right lower leg was carried out. Outcomes: Subsequently, the patient was treated with interferon-γ and immunosuppressant PD-1 inhibitor, and survived for 1 year after amputation. Lessons: Clinical data, immunohistochemisty biomarkers and genes detection results can serve as valuable evidence for pathologists and clinicians in identifying the disease process. Collaborative efforts between clinicians and scientists are crucial in order to identify specific markers that can effectively differentiate between the 2 tumors, thereby enhancing the conclusiveness of the diagnosis.
MeSH term(s)	Male ; Humans ; Aged ; Neurofibrosarcoma/pathology ; Melanoma/diagnosis ; Melanoma/pathology ; Skin Neoplasms/diagnosis ; Skin Neoplasms/pathology ; Melanocytes/pathology ; Melanoma, Amelanotic/diagnosis ; Melanoma, Cutaneous Malignant
Language	English
Publishing date	2023-06-26
Publishing country	United States
Document type	Case Reports ; Journal Article
ZDB-ID	80184-7
ISSN	1536-5964 ; 0025-7974
ISSN (online)	1536-5964
ISSN	0025-7974
DOI	10.1097/MD.0000000000034034
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Using MAIAC AOD to verify the PM2.5 spatial patterns of a land use regression model

Li, Runkui / Tianxiao Ma / Qun Xu / Xianfeng Song

Environmental pollution. 2018 Dec., v. 243

2018

Abstract: Accurate spatial information of PM2.5 is critical for air pollution control and epidemiological studies. Land use regression (LUR) models have been widely used for predicting spatial distribution of ground PM2.5. However, the predicted PM2.5 spatial ... ...

Abstract	Accurate spatial information of PM2.5 is critical for air pollution control and epidemiological studies. Land use regression (LUR) models have been widely used for predicting spatial distribution of ground PM2.5. However, the predicted PM2.5 spatial patterns of a LUR model has not been adequately examined due to limited ground observations. The increasing aerosol optical depth (AOD) products might be an approximation of spatially continuous observation across large areas. This study established the relationship between seasonal 1 km × 1 km MAIAC AOD and observed ground PM2.5 in Beijing, and then seasonal PM2.5 maps were predicted based on AOD. Seasonal LUR models were also developed, and both the AOD and LUR models were validated by hold-out monitoring sites. Finally, the spatial patterns of LUR models were comprehensively verified by the above AOD PM2.5 maps. The results showed that AOD alone could be used directly to predict the spatial distribution of ground PM2.5 concentration at seasonal level (R2 ≥ 0.53 in model fitting and testing), which was comparable with the capability of LUR models (R2 ≥ 0.81 in model fitting and testing). PM2.5 maps derived from the two methods showed similar spatial trend and coordinated variations near traffic roads. Large discrepancies could be observed at urban-rural transition areas where land use characters varied quickly. Variable and buffer size selection was critical for LUR model as they dominated the spatial patterns of predicted PM2.5. Incorporating AOD into LUR model could improve model performance in spring season and provide more reliable results during testing.
Keywords	aerosols ; air pollution control ; epidemiological studies ; land use ; model validation ; models ; monitoring ; particulates ; prediction ; regression analysis ; roads ; spatial data ; spring ; traffic ; China
Language	English
Dates of publication	2018-12
Size	p. 501-509.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	280652-6
ISSN	1873-6424 ; 0013-9327 ; 0269-7491
ISSN (online)	1873-6424
ISSN	0013-9327 ; 0269-7491
DOI	10.1016/j.envpol.2018.09.026
Database	NAL-Catalogue (AGRICOLA)

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Article: Retrieval of the surface evapotranspiration patterns in the alpine grassland–wetland ecosystem applying SEBAL model in the source region of the Yellow River, China

Li, Zhouyuan / Bingquan Yao / De Kejia / Qingping Zhou / Tianlin Niu / Tianxiao Ma / Xuehua Liu

Ecological modelling. 2013 Dec., v. 270

2013

Abstract: The source region of the Yellow River is located in the eastern of Tibetan Plateau at an altitude of 3900–5300m. Applying the method of unsupervised classification, ISODATA, we defined the land covers of the region into five types, snow cover, water body, ...

Abstract	The source region of the Yellow River is located in the eastern of Tibetan Plateau at an altitude of 3900–5300m. Applying the method of unsupervised classification, ISODATA, we defined the land covers of the region into five types, snow cover, water body, bare soil, low coverage grassland, and middle-and-high coverage grassland. To learn the pattern of evapotranspiration (ET) at large scale is essential for the local water use and management. With surface energy balance algorithm for land (SEBAL), we retrieved ET and the energy fluxes with Landsat 5 remote sensing images of the area in the summer of 2006. It was estimated that the instantaneous evapotranspiration was highest in middle-and-high coverage grassland of the southern region at 0.31mm/h on average level, and lowest in bare soil of the northern region at 0.13mm/h on average level. The key variables in SEBAL model, including the normalized difference vegetation index, surface albedo, the surface radiation temperature, net radiation, and sensible heat fluxes were calculated and illustrated to see their patterns in the region. At final, based on the correlation analysis among the key variables, we conducted a conceptual framework of cause–effect loops involving the main factors in the process of ET. Under the framework, we described the typical situations of hydro-heat in the source region.
Keywords	algorithms ; altitude ; body water ; ecosystems ; energy balance ; evapotranspiration ; grasslands ; heat transfer ; Landsat ; models ; remote sensing ; snowpack ; soil ; summer ; temperature ; China ; Yellow River
Language	English
Dates of publication	2013-12
Size	p. 64-75.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	191971-4
ISSN	0304-3800
ISSN	0304-3800
DOI	10.1016/j.ecolmodel.2013.09.004
Database	NAL-Catalogue (AGRICOLA)

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Article ; Research data: (with research data) Inbreeding and inbreeding avoidance in wild giant pandas

Hu, Yibo / Yonggang Nie / Wei Wei / Tianxiao Ma / Russell Van Horn / Xiaoguang Zheng / Ronald R. Swaisgood / Zhixin Zhou / Wenliang Zhou / Li Yan / Zejun Zhang / Fuwen Wei

Molecular ecology. 2017 Oct., v. 26, no. 20

2017

Abstract: Inbreeding can have negative consequences on population and individual fitness, which could be counteracted by inbreeding avoidance mechanisms. However, the inbreeding risk and inbreeding avoidance mechanisms in endangered species are less studied. The ... ...

Abstract	Inbreeding can have negative consequences on population and individual fitness, which could be counteracted by inbreeding avoidance mechanisms. However, the inbreeding risk and inbreeding avoidance mechanisms in endangered species are less studied. The giant panda, a solitary and threatened species, lives in many small populations and suffers from habitat fragmentation, which may aggravate the risk of inbreeding. Here, we performed longâterm observations of reproductive behaviour, sampling of motherâcub pairs and largeâscale genetic analyses on wild giant pandas. Moderate levels of inbreeding were found in 21.1% of mating pairs, 9.1% of parent pairs and 7.7% of panda cubs, but no highâlevel inbreeding occurred. More significant levels of inbreeding may be avoided passively by femaleâbiased natal dispersal rather than by breeding dispersal or active relatednessâbased mate choice mechanisms. The level of inbreeding in giant pandas is greater than expected for a solitary mammal and thus warrants concern for potential inbreeding depression, particularly in small populations isolated by continuing habitat fragmentation, which will reduce female dispersal and increase the risk of inbreeding.
Keywords	Ailuropoda melanoleuca ; endangered species ; females ; genetic analysis ; habitat fragmentation ; inbreeding ; inbreeding depression ; mammals ; mating behavior ; reproductive behavior ; risk
Language	English
Dates of publication	2017-10
Size	p. 5793-5806.
Publishing place	John Wiley & Sons, Ltd
Document type	Article ; Research data
Note	JOURNAL ARTICLE
ZDB-ID	1126687-9
ISSN	1365-294X ; 0962-1083 ; 0962-1083
ISSN (online)	1365-294X
ISSN	0962-1083
DOI	10.1111/mec.14284
Database	NAL-Catalogue (AGRICOLA)

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