Chin J Plant Ecol ›› 2019, Vol. 43 ›› Issue (2): 107-118.DOI: 10.17521/cjpe.2018.0272
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YAN Peng-Fei1,ZHAN Peng-Fei1,XIAO De-Rong1,WANG Yi2,YU Rui1,LIU Zhen-Ya1,WANG Hang1,*()
Received:
2018-10-31
Accepted:
2019-01-30
Online:
2019-02-20
Published:
2019-06-04
Contact:
WANG Hang
Supported by:
YAN Peng-Fei, ZHAN Peng-Fei, XIAO De-Rong, WANG Yi, YU Rui, LIU Zhen-Ya, WANG Hang. Effects of simulated warming and decomposition interface on the litter decomposition rate of Zizania latifolia and its phyllospheric microbial community structure and function[J]. Chin J Plant Ecol, 2019, 43(2): 107-118.
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Fig. 1 Experiment of simulated warming and habitat difference for litter decomposition of Zizania latifolia. A, Three habitats include air interface, water interface, and soil interface. Among them, litter bags under air decomposition were hang over the bamboo (1.2 m from the ground), litter bags under water decomposition were floated in the surface of water (with the aids of table tennis), and litter bags under soil decomposition were fixed by PVC tubes in the soils (5.0 cm in deep). B, The design and operation of Open-top Chamber (OTC). Among them, control group has no OTC devices, and OTC devices simulate rising temperature (warming group). The device was constructed by solar panels with 2.4 m base and 2.0 m opening in diameter. The temperatures between control and warming groups were recorded from December 2014 to December 2015 (once per hour). In warming treatment, the temperature has been raised by 1.5-2.0 ℃. C, The research object was a typical emergent wetland plant, Zizania latifolia. Its leaf litter was subjected to warming and habitat difference treatments.
Fig. 2 Seasonal dynamics in mass remaining of leaf litter from Zizania latifolia (mean ± SE, n = 3). The different lowercase letters above error bars indicate significant differences between treatments by Post Hoc Tests (p < 0.05).
Fig. 4 Diversity of bacterial community indicated by Chao1 index and the bacterial community composition at the genus level for leaf litter of Zizania latifolia. The error bars represent standard errors (n = 3), and the different lowercase letters above error bars indicate significant differences between treatments by Post Hoc Tests (p < 0.05).
Fig. 5 Dynamics in average well color development (AWCD) value for carbon sources utilized by litter phyllospheric microorganisms of Zizania latifolia during an incubation period of 12-168 h. The error bars represent standard errors (n = 3), and the different lowercase letters above error bars indicate significant differences between treatments by Post Hoc Tests (p < 0.05).
Fig. 7 Similarity analysis shows the contribution of different carbon sources to the dissimilarity between control vs. warming, air interface vs. water interface, air interface vs. soil interface, and water interface vs. soil interface, illustrated by heatmaps. The color (blue to red) represents the relative contribution of different carbon substrates (0-100%). The observations at 72-96 h incubation point were used for drawing the heatmaps.
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