Ciliate diversity and distribution across an environmental and depth gradient in Long Island Sound, USA

Environmental Microbiology
Mary DohertyLaura A Katz

Abstract

The nature and extent of microbial biodiversity remain controversial with persistent debates over patterns of distributions (i.e. cosmopolitanism versus endemism) and the processes that structure these patterns (neutrality versus selection). We used culture-independent approaches to address these issues focusing on two groups of ciliates, the Oligotrichia (Spirotrichea) and Choreotrichia (Spirotrichea) across an environmental gradient. We assessed SSU rDNA diversity in ciliate communities at six stations in Long Island Sound spanning the frontal region that separates the fresher Connecticut River outflow plume from the open Sound. As in previous studies, we find one abundant cosmopolitan species (Strombidium biarmatum), a few moderately abundant sequences, and a long list of rare sequences. Furthermore, neither ciliate diversity nor species composition showed any clear relationship to measured environmental parameters (temperature, salinity, accessory pigment composition and chorophyll). Overall, we observed that diversity decreased moving from nearshore to offshore. We also conducted analyses to detect clustering among the sampled communities using the software Unifrac. This approach revealed three significant clusters groupin...Continue Reading

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Dec 5, 2012·Evolution; International Journal of Organic Evolution·Vanessa MessmerSerge Planes
Jun 12, 2013·The Journal of Eukaryotic Microbiology·Kathryn J CoyneStephen C Cary
Jul 5, 2016·Molecular Ecology·Jean-David GrattepancheLaura A Katz
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Sep 21, 2021·Frontiers in Microbiology·Weiwei LiuYehui Tan

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