The impact of phages on interspecific competition in experimental populations of bacteria.
The impact of phages on interspecific competition in experimental populations of bacteria.
复制标题
噬菌体对细菌实验种群种间竞争的影响。
DOI：
10.1186/1472-6785-6-19
复制
发表时间：
2006-12-13
期刊：
影响因子：
--
通讯作者：
Rainey, Paul B.
中科院分区：
文献类型：
--
作者：
Brockhurst, Michael A.;Fenton, Andrew;Roulston, Barrie;Rainey, Paul B.
噬菌体被认为在维持天然细菌群落的多样性方面发挥着至关重要的作用。理论表明，噬菌体对细菌种群进行密度依赖性调节，防止竞争性优势物种排除竞争力较弱的物种。为了测试这一点，我们构建了包含两种细菌（荧光假单胞菌和铜绿假单胞菌）及其噬菌体寄生虫的实验群落。群落在两种环境温度下繁殖，在没有噬菌体的情况下逆转了竞争结果。在存在感染优势竞争者的噬菌体和感染两个竞争者的噬菌体的情况下，共存的均匀性得到增强。发生这种情况是因为噬菌体通过降低优势竞争者的密度来改变竞争相互作用的平衡，从而允许较弱竞争者的密度随之增加。然而，即使共存在两种环境温度下也不稳定。噬菌体可以以与维持共存一致的方式改变细菌物种之间的竞争性相互作用。然而，共存的稳定性可能取决于组成细菌-噬菌体相互作用的性质和环境条件。
Phages are thought to play a crucial role in the maintenance of diversity in natural bacterial communities. Theory suggests that phages impose density dependent regulation on bacterial populations, preventing competitive dominants from excluding less competitive species. To test this, we constructed experimental communities containing two bacterial species (Pseudomonas fluorescens and Pseudomonas aeruginosa) and their phage parasites. Communities were propagated at two environmental temperatures that reversed the outcome of competition in the absence of phage. The evenness of coexistence was enhanced in the presence of a phage infecting the superior competitor and in the presence of phage infecting both competitors. This occurred because phage altered the balance of competitive interactions through reductions in density of the superior competitor, allowing concomitant increases in density of the weaker competitor. However, even coexistence was not equally stable at the two environmental temperatures. Phage can alter competitive interactions between bacterial species in a way that is consistent with the maintenance of coexistence. However, the stability of coexistence is likely to depend upon the nature of the constituent bacteria-bacteriophage interactions and environmental conditions.
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影响因子：
64.8
作者：
Buckling, A;Rainey, PB
通讯作者：
Rainey, PB
DOI：
10.1098/rspb.2003.2556
发表时间：
2004-01-07
影响因子：
4.7
作者：
Brockhurst, MA;Rainey, PB;Buckling, A
通讯作者：
Buckling, A
影响因子：
64.8
作者：
BERGH, O;BORSHEIM, KY;HELDAL, M
通讯作者：
HELDAL, M
DOI：
10.1098/rspb.2005.3086
发表时间：
2005-07-07
影响因子：
4.7
作者：
Brockhurst, MA;Buckling, A;Rainey, PB
通讯作者：
Rainey, PB
影响因子：
2.7
作者：
GIBSON, CC;WATKINSON, AR
通讯作者：
WATKINSON, AR