Abstract：
:The phospholipid fatty acid (PLFA) profiles of soil microbial communities were determined in relation to the patterns of tree cover in a mature Norway spruce plantation. Replicate samples of the surface organic layers were taken close to the trunk, at 1 m and at 2 m (under the edge of the canopy) beneath five trees. Samples were analyzed for standard PLFAs to assess the initial composition of the microbial communities. Replicate samples were then incubated under constant or fluctuating moisture conditions for 30 d to test the hypothesis that the patterns of microbial community structure (or its physiological state) might be determined by biophysical conditions under the tree canopies. The PLFA profiles near the trunks and at 2 m were similar, but samples taken 1 m from the bases of the trees contained lower concentrations of polyunsaturated (fungal) and monounsaturated PLFAs, and higher concentrations of saturated PLFAs. These differences in PLFA profiles were maintained during laboratory incubation under a regime of drying and wetting cycles, but there was some evidence of convergence in community structure under constant moisture conditions resulting from significant increases and decreases in specific bacterial PLFA concentrations. There were no effects of either moisture treatment on fungal PLFA concentrations. It is concluded that variation in the soil biophysical environment beneath the tree canopies resulted in the differentiation of spatially defined bacterial communities that were tolerant of moisture stress. The anomaly that differences in community structure were largest at an intermediate position of 1 m between the trunk and below the canopy edge was not explained but may relate to tree root distribution.
journal_name
Microb Ecoljournal_title
Microbial ecologyauthors
Wilkinson SC,Anderson JMdoi
10.1007/s00248-001-0006-zkeywords:
subject
Has Abstractpub_date
2001-10-01 00:00:00pages
248-255issue
3eissn
0095-3628issn
1432-184Xjournal_volume
42pub_type
杂志文章abstract：:Menez Gwen, Lucky Strike and Rainbow are the three most visited and well-known deep-sea hydrothermal vent fields in the Azores region, located in the Mid-Atlantic Ridge. Their distinct geological and ecological features allow them to support a diversity of vent communities, which are largely dependent on Bacteria and ...
journal_title：Microbial ecology
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abstract：:In order to estimate how pollution affects the bacterial community structure and composition of sediments, chemical and molecular approaches were combined to investigate eight stations around the Bizerte lagoon. Terminal restriction fragment length polymorphism (T-RFLP) analysis of PCR-amplified 16S rRNA genes reveale...
journal_title：Microbial ecology
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更新日期：2010-04-01 00:00:00
abstract：:Since 2008, the kiwifruit industry has been devastated by a pandemic outbreak of Pseudomonas syringae pv. actinidiae (Psa), the causal agent of bacterial canker. This disease has become the most significant limiting factor in kiwifruit production. Psa colonizes different organs of the host plant, causing a specific sy...
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更新日期：2020-07-01 00:00:00
abstract：:Endophytes are microbial symbionts living inside plants and have been extensively researched in recent decades for their functions associated with plant responses to environmental stress. We conducted a meta-analysis of endophyte effects on host plants' growth and fitness in response to three abiotic stress factors: d...
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pub_type： 杂志文章,meta分析
doi：10.1007/s00248-017-1054-3
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abstract：:A significant number of viable colony-forming bacteria were recovered from deep-ocean bottom water samples passed through a 0.45μm filter. However, these bacteria small enough to pass through a 0.45μm membrane filter and termed "filterable bacteria" were less abundant in open-ocean surface water and coastal water samp...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/BF02010479
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abstract：:Composition and distribution of planktonic protists were examined relative to microbial food web dynamics (growth, grazing, and nitrogen cycling rates) at the Old Woman Creek (OWC) National Estuarine Research Reserve during an episodic storm event in July 2003. More than 150 protistan taxa were identified based on mor...
journal_title：Microbial ecology
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doi：10.1007/s00248-004-0250-0
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abstract：:Associations between soil properties and Pythium groups on soybean roots were investigated in 83 commercial soybean fields in North Dakota. A data set containing 2877 isolates of Pythium which included 26 known spp. and 1 unknown spp. and 13 soil properties from each field were analyzed. A Pearson correlation analysis...
journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-017-0958-2
更新日期：2017-10-01 00:00:00
abstract：:We studied the persistence of Bacillus thuringiensis serovar israelensis (Bti) in a typical breeding site of the mosquito Ochlerotatus caspius in a particularly sensitive salt marsh ecosystem following two Bti-based larvicidal applications (Vectobac 12AS, 1.95 L/ha). The treated area was composed of four larval biotop...
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doi：10.1007/s00248-005-0247-3
更新日期：2005-11-01 00:00:00
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journal_title：Microbial ecology
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更新日期：1984-06-01 00:00:00
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更新日期：2015-05-01 00:00:00
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doi：10.1007/s00248-004-0012-z
更新日期：2005-04-01 00:00:00
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journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s00248-011-9876-x
更新日期：2011-10-01 00:00:00
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journal_title：Microbial ecology
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doi：10.1007/s00248-014-0506-2
更新日期：2015-04-01 00:00:00
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journal_title：Microbial ecology
pub_type： 杂志文章
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更新日期：2011-02-01 00:00:00
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doi：10.1007/s00248-010-9634-5
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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journal_title：Microbial ecology
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journal_title：Microbial ecology
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journal_title：Microbial ecology
pub_type： 杂志文章
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更新日期：2005-02-01 00:00:00
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更新日期：2008-08-01 00:00:00
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journal_title：Microbial ecology
pub_type： 杂志文章
doi：10.1007/s002480000102
更新日期：2001-10-01 00:00:00
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pub_type： 杂志文章
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更新日期：1974-12-01 00:00:00
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更新日期：2007-07-01 00:00:00
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journal_title：Microbial ecology
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更新日期：1981-12-01 00:00:00
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journal_title：Microbial ecology
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journal_title：Microbial ecology
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