Cover image: The tank bromeliad Aechmea mertensii, rooted on a nest of Camponotus femoratus. Water-holding bromeliads are a suitable habitat for Anoxygenic phototrophic bacteria. This photo was taken on the edge of the road to the Petit-Saut Dam, French Guiana. Photograph by Jean-François Carrias. See related article by Vergne et al., pp. 2550–2565.

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封面图片和问题信息

封面图片：水箱凤梨Aechmea mertensii，植根于Camponotus femoratus 的巢穴。持水凤梨科植物是缺氧光养细菌的合适栖息地。这张照片是在通往法属圭亚那小索大坝的道路边缘拍摄的。让-弗朗索瓦·卡里亚斯摄。参见 Vergne 等人的相关文章，第 2550-2565 页。