Abstract:
PREMISE OF THE STUDY:Factors shaping spatiotemporal patterns of associations in mutualistic systems are poorly understood. We used the lichen-forming fungi Peltigera and their cyanobacterial partners Nostoc to investigate the spatial structure of this symbiosis at an intrabiome scale and to identify potential factors shaping these associations. METHODS:Ninety-three thalli were sampled in Québec, Canada, along a south-north and an east-west transect of ~1300 km each. We identified the two main partners (Peltigera species and Nostoc phylogroups) using molecular markers and modeled the effects of environmental variables and partner occurrence on Peltigera-Nostoc distributions. KEY RESULTS:Peltigera species showed a high degree of specialization toward cyanobionts, whereas two Nostoc phylogroups dominated both transects by associating with several Peltigera species. Peltigera species had narrower ranges than these two main cyanobionts. Distributions of three Peltigera species were highly associated with precipitation and temperature variables, which was not detected for Nostoc phylogroups at this spatial scale. CONCLUSIONS:For these cyanolichens, factors driving patterns of symbiotic associations are scale dependent. Contrary to global-scale findings, generalist Peltigera species were not more widespread within the boreal biome than specialists. Nostoc availability was not the only driver of Peltigera species' geographic ranges; environmental factors also contributed to their intrabiome distributions. Climatic conditions (especially precipitation) limited the range of some Peltigera species more than the range of their cyanobacterial partners at an intrabiome (boreal) scale.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Lu J,Magain N,Miadlikowska J,Coyle JR,Truong C,Lutzoni Fdoi
10.1002/ajb2.1119subject
Has Abstractpub_date
2018-07-01 00:00:00pages
1198-1211issue
7eissn
0002-9122issn
1537-2197journal_volume
105pub_type
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1200426
更新日期:2013-08-01 00:00:00
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更新日期:2017-03-01 00:00:00
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doi:10.3732/ajb.1100546
更新日期:2012-07-01 00:00:00
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更新日期:2013-10-01 00:00:00
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更新日期:2005-02-01 00:00:00
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journal_title:American journal of botany
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更新日期:2002-09-01 00:00:00
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pub_type: 杂志文章
doi:10.3732/ajb.92.12.2011
更新日期:2005-12-01 00:00:00
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更新日期:2015-03-01 00:00:00
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pub_type: 杂志文章
doi:10.3732/ajb.90.3.471
更新日期:2003-03-01 00:00:00
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更新日期:2008-06-01 00:00:00
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更新日期:2014-09-01 00:00:00
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更新日期:2010-10-01 00:00:00
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更新日期:2011-01-01 00:00:00
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更新日期:2012-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:2018-10-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:
更新日期:2001-07-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.1002/ajb2.1074
更新日期:2018-04-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2013-04-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2018-09-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2009-02-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.1002/ajb2.1372
更新日期:2019-11-01 00:00:00