Effects of simulated warming and decomposition interface on the litter decomposition rate of Zizania latifolia and its phyllospheric microbial community structure and function

Aims Litters of emergent plants are important components of material cycling in wetland ecosystems. To clarify the effects of climate warming and habitat difference on the litter decomposition processes and phyllospheric microorganisms of wetland emergent plants is of great significance for revealing the key material cycling processes in wetland ecosystems. Methods Zizania latifolia, a dominant emergent plant in typical wetlands of Northwestern Yunnan Plateau, was chosen for this study. Using litter bag methods, we studied mass remaining and the abundance, community structure and metabolic potential of phyllospheric microorganisms of the litter from Zizania latifolia under simulated warming (1.5–2.0 °C) and under three habitats (air, water and soil interface). Important findings Simulated climatic warming and habitat difference significantly affected the litter decomposition rate. After one-year decomposition, the mass remaining of litter was 66.4% under the simulated warming treatment, while 77.7% under the control treatment. The decomposition constant (k) value was 1.64 times under warming compared to the control. The mass remaining of litter at the water and soil interface was 42.2% and 25.3%, and the k value at the water and soil interface was 3.63 and 5.25 times of that at the air interface respectively. These results indicate that habitat difference was the key factor controlling the decomposition of emergent plant litter in wetlands. Moreover, warming mainly changed the community composition of litter phyllospheric microorganisms, while decomposition interface mainly affected the abundance, community structure and meta©植物生态学报 Chinese Journal of Plant Ecology 108 植物生态学报 Chinese Journal of Plant Ecology 2019, 43 (2): 107–118 www.plant-ecology.com bolic potential of phyllospheric microorganisms. Notably, phyllospheric microorganisms of litter at soil interface had the highest metabolic potential and utilized alcohols as main carbon sources. The characteristics of phyllospheric microorganisms between different treatments were in good agreement with litter decomposition rate, which provides an important theoretical basis for revealing the microbial mechanisms driving the decomposition of wetland plant litter.

[1]  Thomas C. Parker,et al.  Exploring drivers of litter decomposition in a greening Arctic: results from a transplant experiment across a treeline , 2018, Ecology.

[2]  C. Legrand,et al.  Response of Microbial Communities to Changing Climate Conditions During Summer Cyanobacterial Blooms in the Baltic Sea , 2018, Front. Microbiol..

[3]  C. Ascaso,et al.  Endolithic microbial habitats as refuges for life in polyextreme environment of the Atacama Desert. , 2018, Current opinion in microbiology.

[4]  Rashmi,et al.  Phyllospheric microflora and its impact on plant growth: A review , 2017 .

[5]  H. Liu,et al.  Pantoea alhagi, a novel endophytic bacterium with ability to improve growth and drought tolerance in wheat , 2017, Scientific Reports.

[6]  刘振亚 Liu Zhenya,et al.  Effect of experimental warming on the decomposition of litter from dominant lakeside plants in a typical wetland of Northwestern Yunnan Plateau, China , 2017 .

[7]  M. Graça,et al.  Leaf litter decomposition in remote oceanic island streams is driven by microbes and depends on litter quality and environmental conditions , 2016 .

[8]  Y. Wan-qin,et al.  Effects of streams on lignin degradation during foliar litter decomposition in an alpine forest , 2016 .

[9]  Junjie Yang,et al.  Changes in soil microbial communities during litter decomposition , 2016 .

[10]  Aaron Barkoh,et al.  Evaluation of Community-Level Physiological Profiling for Monitoring Microbial Community Function in Aquaculture Ponds , 2016 .

[11]  G. Bonanomi,et al.  Litter quality and temperature modulate microbial diversity effects on decomposition in model experiments , 2015 .

[12]  J. Cornelissen,et al.  Decomposition of 51 semidesert species from wide-ranging phylogeny is faster in standing and sand-buried than in surface leaf litters: implications for carbon and nutrient dynamics , 2015, Plant and Soil.

[13]  C. Gagnon,et al.  Variation in stocks and distribution of organic C in soils across 21 eastern Canadian temperate and boreal forests , 2015 .

[14]  Huang Yong-mei,et al.  Effects of grassland-use on soil respiration and litter decomposition , 2015 .

[15]  Hejie,et al.  The responses of early foliar litter humification to reduced snow cover during winter in an alpine forest , 2014 .

[16]  M. Zimmer,et al.  Effects of warming and nutrient enrichment on how grazing pressure affects leaf litter-colonizing bacteria. , 2014, Journal of environmental quality.

[17]  Hai Yan,et al.  [Dynamics of microbes and enzyme activities during litter decomposition of Pinus massoniana forest in mid-subtropical area]. , 2014, Huan jing ke xue= Huanjing kexue.

[18]  Xiong Li,et al.  Spatial characteristics in decomposition rate of foliar litter and controlling factors in Chinese forest ecosystems , 2014 .

[19]  周道玮 Zhou Daowei,et al.  The accumulation, decomposition and ecological effect of above-ground litter in terrestrial ecosystem , 2014 .

[20]  宋飘 Song Piao,et al.  Impacts of global warming on litter decomposition , 2014 .

[21]  T. Osono,et al.  The roles of microorganisms in litter decomposition and soil formation , 2014, Biogeochemistry.

[22]  Wang Shizhong.  Effect of mangrove leaf litter decomposition on soil dissolved organic matter , 2013 .

[23]  田昆 Tian Kun,et al.  Biomass production and litter decomposition of lakeshore plants in Napahai wetland,Northwestern Yunnan Plateau,China , 2013 .

[24]  M. Estiarte,et al.  Effects of climate change on leaf litter decomposition across post-fire plant regenerative groups , 2012 .

[25]  Axel Thomas,et al.  Spatial and temporal temperature trends on the Yunnan Plateau (Southwest China) during 1961–2004 , 2011 .

[26]  Verónica Ferreira,et al.  Future increase in temperature more than decrease in litter quality can affect microbial litter decomposition in streams , 2011, Oecologia.

[27]  William A. Walters,et al.  QIIME allows analysis of high-throughput community sequencing data , 2010, Nature Methods.

[28]  Lin Zhi-chao.  Controlling Factors of Litter Decomposition Rate in China′s Forests , 2010 .

[29]  Mao Zhong-gui.  The Behavior of Anaerobic Fermentation in the Technique of Alcohol Fermentation Cooperate with Methane Fermentation , 2010 .

[30]  Jian Zhang,et al.  Litter decomposition in two subalpine forests during the freeze–thaw season , 2010 .

[31]  L. Qing,et al.  A review of responses of litter decomposition in terrestrial ecosystems to global warming. , 2009 .

[32]  Songlin Xin.  A review on the effects of global environment change on litter decomposition , 2008 .

[33]  Chen Cheng,et al.  Variation in litter decomposition-temperature relationships between coniferous and broadleaf forests in Huangshan Mountain, China , 2007 .

[34]  Jian Zhang,et al.  [Forest litter decomposition and its responses to global climate change]. , 2007, Ying yong sheng tai xue bao = The journal of applied ecology.

[35]  Sun Zhi.  Development in study of wetland litter decomposition and its responses to global change , 2007 .

[36]  Xu Xiao,et al.  CLIMATE WARMING IMPACTS ON CARBON CYCLING IN TERRESTRIAL ECOSYSTEMS , 2007 .

[37]  M. Gessner,et al.  DIEL MINERALIZATION PATTERNS OF STANDING-DEAD PLANT LITTER: IMPLICATIONS FOR CO2 FLUX FROM WETLANDS , 2004 .

[38]  Peng Shao.  The Dynamics of Forest Litter and Its Responses to Global Warming , 2002 .

[39]  S. Y. Newell.  Fungal biomass and productivity in standing-decaying leaves of black needlerush ( Juncus roemerianus ) , 2001 .

[40]  B. Berg,et al.  Nitrogen and phosphorus release from decomposing litter in relation to the disappearance of lignin , 1989 .

[41]  E. Juni,et al.  Nutritional Requirements of Acinetobacter Strains Isolated from Soil, Water, and Sewage , 1972, Journal of bacteriology.