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  1. 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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  2. Article ; Online: Energy-Balanced Routing for Maximizing Network Lifetime in WirelessHART

    Sheng Zhang / Ao Yan / Tianming Ma

    International Journal of Distributed Sensor Networks, Vol

    2013  Volume 9

    Abstract: WirelessHART is an emerging wireless sensor network protocol. In this paper, a joint graph routing algorithm for maximizing the network lifetime (JRMNL) in WirelessHART is proposed. Node communication load factor is approximately estimated by matrix ... ...

    Abstract WirelessHART is an emerging wireless sensor network protocol. In this paper, a joint graph routing algorithm for maximizing the network lifetime (JRMNL) in WirelessHART is proposed. Node communication load factor is approximately estimated by matrix operations for the first time. Then node communication load, the residual energy, and the link transmission power are integrated as a link cost function that is accurately measured in this algorithm. A node chooses the optimal next hop by comparing the link cost function of all its neighbor nodes, which guarantees the energy balancing of the whole network. Simulation results show that the proposed algorithm can extend network lifetime by a factor of 2 relative to the maximum residual energy selection algorithm and prolong the network lifetime by a factor of 7 relative to the minimum transmission power routing algorithm, but the average energy consumption per route will increase by 2 dBm compared with the minimum transmission power routing algorithm.
    Keywords Electronic computers. Computer science ; QA75.5-76.95
    Subject code 003
    Language English
    Publishing date 2013-10-01T00:00:00Z
    Publisher SAGE Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Cryptosporidium spp. in wild rats (Rattus spp.) from the Hainan Province, China

    Wei Zhao / Huanhuan Zhou / Yi Huang / Liulian Xu / Langyu Rao / Shanshan Wang / Wenqi Wang / Yufang Yi / Xiaojun Zhou / Yue Wu / Tianming Ma / Gaoyu Wang / Xiaoyuan Hu / Ruoyan Peng / Feifei Yin / Gang Lu

    International Journal for Parasitology: Parasites and Wildlife, Vol 9, Iss , Pp 317-

    Molecular detection, species/genotype identification and implications for public health

    2019  Volume 321

    Abstract: Wild rats (Rattus spp.) carry many zoonotic pathogens including Cryptosporidium. Due to the close proximity of rats to humans in urban environments, the potential for disease transmission is high. Cryptosporidium is a protozoan parasite which when ... ...

    Abstract Wild rats (Rattus spp.) carry many zoonotic pathogens including Cryptosporidium. Due to the close proximity of rats to humans in urban environments, the potential for disease transmission is high. Cryptosporidium is a protozoan parasite which when ingested causes serious human illness. Despite its importance, genetic characterization of Cryptosporidium in wild rats in the Hainan province of China has not been performed. In this study, we analyzed the occurrence and genetics of Cryptosporidium in wild rats from Hainan, China. From December 2017 to October 2018, 150 wild rats were captured and fresh fecal material was collected from intestinal sections. Rat species were identified by PCR-based amplification and analysis of the vertebrate cytochrome b (cytb) gene. Cryptosporidium was examined by PCR amplification of the partial small subunit of ribosomal DNA (SSU rDNA). C. viatorum were subtyped by PCR analysis of the gp60 gene. A total of four rat species were identified including Asian house rats (Rattus tanezumi) (n = 46), brown rats (Rattus norvegicus) (n = 56), Edward's long-tailed rats (Leopoldamys edwardsi) (n = 38) and muridae (Niviventer fulvescens) (n = 10), with Cryptosporidium positive rates of 73.9%, 28.6%, 55.3% and 40.0%, respectively (average infection rate: 50.0%, 75/150. Sequence analysis confirmed the presence of four Cryptosporidium species and two genotypes including C. viatorum (n = 11); C. occultus (n = 2); C. muris (n = 1); and C. erinacei (n = 1); rat genotypes III (n = 13) and IV (n = 47). Three novel subtypes of C. viatorum were identified in 6 of the 11 infected Edward's long-tailed rats: XVcA2G1a (n = 4), XVcA2G1b (n = 1) and XVdA3 (n = 1). The identification of human pathogenic C. viatorum and zoonotic C. occultus, C. muris and C. erinacei, suggested that wild rats infected with Cryptosporidium pose a threat to human health. Taken together, these findings highlight the need to control the rat population in Hainan, China. The need to improve the public awareness of the risk of disease ...
    Keywords Zoology ; QL1-991
    Subject code 590
    Language English
    Publishing date 2019-08-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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