globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12188
Scopus记录号: 2-s2.0-84979765586
论文题名:
Growth of elaborate microbial pinnacles in Lake Vanda, Antarctica
作者: Sumner D.Y.; Jungblut A.D.; Hawes I.; Andersen D.T.; Mackey T.J.; Wall K.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2016
卷: 14, 期:6
起始页码: 556
结束页码: 574
语种: 英语
Scopus关键词: carbon fixation ; cyanobacterium ; genomics ; geographical distribution ; ice cover ; microbial activity ; microbial community ; morphology ; photosynthesis ; water depth ; Antarctica ; East Antarctica ; Lake Vanda ; McMurdo Dry Valleys ; Cyanobacteria ; Leptolyngbya ; Phormidium ; Tychonema ; Antarctica ; biomass ; cyanobacterium ; growth, development and aging ; ice cover ; lake ; metabolism ; microbiology ; photosynthesis ; Antarctic Regions ; Biomass ; Cyanobacteria ; Ice Cover ; Lakes ; Photosynthesis
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Microbial pinnacles in ice-covered Lake Vanda, McMurdo Dry Valleys, Antarctica, extend from the base of the ice to more than 50 m water depth. The distribution of microbial communities, their photosynthetic potential, and pinnacle morphology affects the local accumulation of biomass, which in turn shapes pinnacle morphology. This feedback, plus environmental stability, promotes the growth of elaborate microbial structures. In Lake Vanda, all mats sampled from greater than 10 m water depth contained pinnacles with a gradation in size from <1-mm-tall tufts to pinnacles that were centimeters tall. Small pinnacles were cuspate, whereas larger ones had variable morphology. The largest pinnacles were up to ~30 cm tall and had cylindrical bases and cuspate tops. Pinnacle biomass was dominated by cyanobacteria from the morphological and genomic groups Leptolyngbya, Phormidium, and Tychonema. The photosynthetic potential of these cyanobacterial communities was high to depths of several millimeters into the mat based on PAM fluorometry, and sufficient light for photosynthesis penetrated ~5 mm into pinnacles. The distribution of photosynthetic potential and its correlation to pinnacle morphology suggests a working model for pinnacle growth. First, small tufts initiate from random irregularities in prostrate mat. Some tufts grow into pinnacles over the course of ~3 years. As pinnacles increase in size and age, their interiors become colonized by a more diverse community of cyanobacteria with high photosynthetic potential. Biomass accumulation within this subsurface community causes pinnacles to swell, expanding laminae thickness and creating distinctive cylindrical bases and cuspate tops. This change in shape suggests that pinnacle morphology emerges from a specific distribution of biomass accumulation that depends on multiple microbial communities fixing carbon in different parts of pinnacles. Similarly, complex patterns of biomass accumulation may be reflected in the morphology of elaborate ancient stromatolites. © 2016 John Wiley & Sons Ltd
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85089
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: Department of Earth and Planetary Sciences, University of California, Davis, CA, United States; Life Sciences Department, The Natural History Museum, London, United Kingdom; Gateway Antarctica, University of Canterbury, Christchurch, New Zealand; Carl Sagan Center for the Study of Life in the Universe, SETI Institute, Mountain View, CA, United States; Microbiology Graduate Group, University of California, Davis, CA, United States

Recommended Citation:
Sumner D.Y.,Jungblut A.D.,Hawes I.,et al. Growth of elaborate microbial pinnacles in Lake Vanda, Antarctica[J]. Geobiology,2016-01-01,14(6)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Sumner D.Y.]'s Articles
[Jungblut A.D.]'s Articles
[Hawes I.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Sumner D.Y.]'s Articles
[Jungblut A.D.]'s Articles
[Hawes I.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Sumner D.Y.]‘s Articles
[Jungblut A.D.]‘s Articles
[Hawes I.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.