干旱区生态环境知识资源中心(Arid): Small-Scale Spatial Heterogeneity of Photosynthetic Fluorescence Associated with Biological Soil Crust Succession in the Tengger Desert, China

Arid

DOI	10.1007/s00248-019-01356-0
	Small-Scale Spatial Heterogeneity of Photosynthetic Fluorescence Associated with Biological Soil Crust Succession in the Tengger Desert, China
	Lan, Shubin 1,2; Thomas, Andrew David 2; Tooth, Stephen 2; Wu, Li 2,3; Hu, Chunxiang 1
通讯作者	Hu, Chunxiang
来源期刊	MICROBIAL ECOLOGY
ISSN	0095-3628
EISSN	1432-184X
出版年	2019
卷号	78 期号:4 页码:936-948
英文摘要	In dryland regions, biological soil crusts (BSCs) have numerous important ecosystem functions. Crust species and functions are, however, highly spatially heterogeneous and remain poorly understood at a range of scales. In this study, chlorophyll fluorescence imaging was used to quantify millimeter-scale patterns in the distribution and activity of photosynthetic organisms in BSCs of different successional stages (including cyanobacterial, lichen, moss three main successional stages and three intermixed transitional stages) from the Tengger Desert, China. Chlorophyll fluorescence images derived from the Imaging PAM (Pulse Amplitude Modulation) showed that with the succession from cyanobacterial to lichen and to moss crusts, crust photosynthetic efficiency (including the maximum and effective photosynthetic efficiency, respectively) and fluorescence coverage increased significantly (P < 0.05), and that increasing photosynthetically active radiation (PAR) reduced the effective photosynthetic efficiency (Yield). The distribution of photosynthetic organisms in crusts determined Fv/Fm (ratio of variable fluorescence to maximum fluorescence) frequency pattern, although the photosynthetic heterogeneity (SHI index) was not significantly different (P > 0.05) between cyanobacterial and moss crusts, and showed a unimodal pattern of Fv/Fm values. In contrast, photosynthetic heterogeneity was significantly higher in lichen, cyanobacteria-moss and lichen-moss crusts (P < 0.05), with a bimodal pattern of Fv/Fm values. Point pattern analysis showed that the distribution pattern of chlorophyll fluorescence varied at different spatial scales and also among the different crust types. These new results provide a detailed (millimeter-scale) insight into crust photosynthetic mechanisms and spatial distribution patterns associated with their community types. Collectively, this information provides an improved theoretical basis for crust maintenance and management in dryland regions.
英文关键词	Drylands Biological soil crusts Chlorophyll fluorescence Photosynthesis Heterogeneity Succession
类型	Article
语种	英语
国家	Peoples R China ; Wales
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000495294900014
WOS关键词	RECOVERY RATES ; PHOTOSYSTEM-II ; ALGAL CRUSTS ; CYANOBACTERIAL ; PATTERNS ; INSIGHTS ; CARBON ; NEGEV ; TREES
WOS类目	Ecology ; Marine & Freshwater Biology ; Microbiology
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Microbiology
EI主题词	2019-11-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310414
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Hubei, Peoples R China; 2.Aberystwyth Univ, Dept Geog & Earth Sci, Aberystwyth SY23 3DB, Dyfed, Wales; 3.Wuhan Univ Technol, Sch Resources & Environm Engn, Wuhan 430072, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Lan, Shubin,Thomas, Andrew David,Tooth, Stephen,et al. Small-Scale Spatial Heterogeneity of Photosynthetic Fluorescence Associated with Biological Soil Crust Succession in the Tengger Desert, China[J],2019,78(4):936-948.
APA	Lan, Shubin,Thomas, Andrew David,Tooth, Stephen,Wu, Li,&Hu, Chunxiang.(2019).Small-Scale Spatial Heterogeneity of Photosynthetic Fluorescence Associated with Biological Soil Crust Succession in the Tengger Desert, China.MICROBIAL ECOLOGY,78(4),936-948.
MLA	Lan, Shubin,et al."Small-Scale Spatial Heterogeneity of Photosynthetic Fluorescence Associated with Biological Soil Crust Succession in the Tengger Desert, China".MICROBIAL ECOLOGY 78.4(2019):936-948.