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The distribution and drivers of microbial pigments in the cryoconite of four Tibetan glaciers.
Lyu, Xianfu; Cui, Wanzhe; Ji, Mukan; Wang, Wenqiang; Zhang, Zhihao; Liu, Yongqin.
Afiliación
  • Lyu X; The Environment Change & Multi-sphere Interaction Team (ECMI), State Key Laboratory of Tibetan Plateau Earth System, Environment and Resource (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China.
  • Cui W; Center for the Pan-third Pole Environment, Lanzhou University, Lanzhou, China.
  • Ji M; Center for the Pan-third Pole Environment, Lanzhou University, Lanzhou, China.
  • Wang W; Center for the Pan-third Pole Environment, Lanzhou University, Lanzhou, China.
  • Zhang Z; The Environment Change & Multi-sphere Interaction Team (ECMI), State Key Laboratory of Tibetan Plateau Earth System, Environment and Resource (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China.
  • Liu Y; University of Chinese Academy of Sciences, Beijing, China.
Environ Microbiol ; 26(1): e16550, 2024 Jan.
Article en En | MEDLINE | ID: mdl-38087431
Microbial pigments play a significant role in glacier albedo reduction, thereby contributing to accelerated glacier retreat. The Tibetan Plateau has experienced rapid glacier retreat in recent decades due to global warming, yet there is limited understanding of microbial pigment distribution in the region. Here, we investigated the pigment concentration and composition in cryoconite from four glaciers. Our results showed that chlorophylls were the dominant pigments in Palong No. 4 (PL) and Jiemayangzong (JMYZ) glaciers located in the south of the Tibetan Plateau, while carotenoids were dominant in Qiangyong (QY) and Tanggula (TGL) glaciers located in the central region. Additionally, the chlorophyll b to chlorophyll a ratio, which is an indicator of the algae-to-cyanobacteria ratio, was higher in PL and JMYZ compared to QY and TGL. By using Random Forest Regression and Structural Equation Modelling, we determined that the concentrations of chlorophyll a, chlorophyll b, and carotenoids were associated with autotrophic bacteria relative abundance, climatic factors, and a combination of bacterial and climatic factors, respectively. This study is the first to describe the distribution of microbial pigments in cryoconite from Tibetan glaciers, providing additional support on the influence of algal pigment on glacier retreat.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Cianobacterias / Cubierta de Hielo País/Región como asunto: Asia Idioma: En Revista: Environ Microbiol Asunto de la revista: MICROBIOLOGIA / SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Cianobacterias / Cubierta de Hielo País/Región como asunto: Asia Idioma: En Revista: Environ Microbiol Asunto de la revista: MICROBIOLOGIA / SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China