Jones B W, Maruyama A, Ouverney C C, Nishiguchi M K
Department of Biology, New Mexico State University, Las Cruces, NM 88003-8001, USA.
Microb Ecol. 2007 Aug;54(2):314-23. doi: 10.1007/s00248-006-9204-z. Epub 2007 Mar 8.
Relatively little is known about large-scale spatial and temporal fluctuations in bacterioplankton, especially within the bacterial families. In general, however, a number of abiotic factors (namely, nutrients and temperature) appear to influence distribution. Community dynamics within the Vibrionaceae are of particular interest to biologists because this family contains a number of important pathogenic, commensal, and mutualist species. Of special interest to this study is the mutualism between sepiolid squids and Vibrio fischeri and Vibrio logei, where host squids seed surrounding waters daily with their bacterial partners. This study seeks to examine the spatial and temporal distribution of the Vibrionaceae with respect to V. fischeri and V. logei in Hawaii, southeastern Australia, and southern France sampling sites. In particular, we examine how the presence of sepiolid squid hosts influences community population structure within the Vibrionaceae. We found that abiotic (temperature) and biotic (host distribution) factors both influence population dynamics. In Hawaii, three sites within squid host habitat contained communities of Vibrionaceae with higher proportions of V. fischeri. In Australia, V. fischeri numbers at host collection sites were greater than other populations; however, there were no spatial or temporal patterns seen at other sample sites. In France, host presence did not appear to influence Vibrio communities, although sampled populations were significantly greater in the winter than summer sampling periods. Results of this study demonstrate the importance of understanding how both abiotic and biotic factors interact to influence bacterial community structure within the Vibrionaceae.
关于浮游细菌的大规模时空波动，尤其是在细菌家族内部，我们了解得相对较少。然而，一般来说，一些非生物因素（即营养物质和温度）似乎会影响其分布。弧菌科内部的群落动态尤其引起生物学家的兴趣，因为这个家族包含许多重要的致病、共生和互利共生物种。本研究特别感兴趣的是乌贼与费氏弧菌和洛氏弧菌之间的互利共生关系，宿主乌贼每天都会将其细菌伙伴散播到周围水域。本研究旨在考察夏威夷、澳大利亚东南部和法国南部采样点弧菌科相对于费氏弧菌和洛氏弧菌的时空分布。特别是，我们研究了乌贼宿主的存在如何影响弧菌科内的群落种群结构。我们发现非生物因素（温度）和生物因素（宿主分布）都会影响种群动态。在夏威夷，乌贼宿主栖息地内的三个地点含有弧菌科群落，其中费氏弧菌的比例更高。在澳大利亚，宿主采集地点的费氏弧菌数量比其他种群更多；然而，在其他采样地点没有观察到时空模式。在法国，宿主的存在似乎并未影响弧菌群落，尽管冬季采样的种群数量明显多于夏季采样期。本研究结果表明了解非生物因素和生物因素如何相互作用以影响弧菌科内细菌群落结构的重要性。
