Distribution of thermophilic endospores in a temperate estuary indicate that dispersal history structures sediment microbial communities.
Distribution of thermophilic endospores in a temperate estuary indicate that dispersal history structures sediment microbial communities.
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DOI：
10.1111/1462-2920.14056
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发表时间：
2018-03
影响因子：
5.1
通讯作者：
Hubert CRJ
中科院分区：
文献类型：
--
作者：
Bell E;Blake LI;Sherry A;Head IM;Hubert CRJ
嗜热细菌的内生孢子存在于冷温带沉积物中，在那里它们持续处于休眠状态。作为不能在低环境温度下生长的非活性内生孢子，它们类似于冷沉积物中的示踪颗粒，不受通常控制微生物生物地理学的因素（例如选择、漂移、突变）的影响。这使得嗜热内生孢子成为研究微生物生物地理学的理想模型生物，因为它们的空间分布可以与其传播历史直接相关。为了评估河口细菌的扩散历史，在高温培养（50°C）下，从泰恩河淡水到海洋断面沿线的沉积物中富集了嗜热内生孢子。 75 个不同类群的扩散历史表明，大多数河口内生孢子源自陆地；与来自与工业活动相关的温暖栖息地的细菌关系最为密切。检测到的分类群的一个子集来自海洋，其近亲来自炎热的深海生物圈栖息地。这些模式与泰恩河沉积物的来源主要是陆地的一致。结果表明，河口和海洋沉积物中的微生物群落是由双向水流、陆地径流和工业废水构成的，是被动扩散和移民的载体。
Endospores of thermophilic bacteria are found in cold and temperate sediments where they persist in a dormant state. As inactive endospores that cannot grow at the low ambient temperatures, they are akin to tracer particles in cold sediments, unaffected by factors normally governing microbial biogeography (e.g., selection, drift, mutation). This makes thermophilic endospores ideal model organisms for studying microbial biogeography since their spatial distribution can be directly related to their dispersal history. To assess dispersal histories of estuarine bacteria, thermophilic endospores were enriched from sediments along a freshwater‐to‐marine transect of the River Tyne in high temperature incubations (50°C). Dispersal histories for 75 different taxa indicated that the majority of estuarine endospores were of terrestrial origin; most closely related to bacteria from warm habitats associated with industrial activity. A subset of the taxa detected were marine derived, with close relatives from hot deep marine biosphere habitats. These patterns are consistent with the sources of sediment in the River Tyne being predominantly terrestrial in origin. The results point to microbial communities in estuarine and marine sediments being structured by bi‐directional currents, terrestrial run‐off and industrial effluent as vectors of passive dispersal and immigration.
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DOI：
10.1038/ismej.2012.8
发表时间：
2012-08
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
影响因子：
4.5
作者：
Aller, JY;Kuznetsova, MR;Kemp, PF
通讯作者：
Kemp, PF
影响因子：
3
作者：
Fierer, Noah;Lennon, Jay T.
通讯作者：
Lennon, Jay T.
影响因子：
2.2
作者：
CORDRUWISCH, R
通讯作者：
CORDRUWISCH, R
影响因子：
11
作者：
Galand, Pierre E.;Potvin, Marianne;Lovejoy, Connie
通讯作者：
Lovejoy, Connie