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

Wiley - Tập 12 Số 4 - Trang 886-898 - 2010
Mary K. Doherty1, Maiko Tamura2, Barbara A. Costas3, Mark E. Ritchie4, George B. McManus3, Laura A. Katz2,1
1Department of Organismic and Evolutionary Biology, 611 North Pleasant Street University of Massachusetts, Amherst, MA 01003, USA.
2Department of Biological Sciences, Clark Science Center, Smith College, Northampton, MA 01063, USA
3Department of Marine Sciences, 1080 Shennecossett Road, University of Connecticut, Groton, CT 06340, USA
4Syracuse University, Department of Biology, 108 College Place, Syracuse, NY 13244, USA.

Tóm tắt

SummaryThe 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 grouping samples from nearshore, surface and deep/well mixed stations. We find no strong fit of our communities to log series, geometric or log normal distributions, though one of the 3 clusters is most consistent with a log series distribution. However, when we remove the abundant cosmopolitan species S. biarmatum, all three clusters fit to a log series distribution. These analyses suggest that, with the exception of one cosmopolitan species, the oligotrich and choreotrich communities at these stations may be distributed in a neutral manner.

Từ khóa


Tài liệu tham khảo

10.1093/nar/25.17.3389

Colwell R.K.(2006)EstimateS: Statistical estimation of species richness and shared species from samples. Version 8. [WWW document]. Persistent URLhttp://purl.oclc.org/estimates

10.1111/j.1462-2920.2007.01243.x

10.1890/06-0387

10.1111/j.1462-2920.2008.01580.x

10.1128/AEM.67.7.2932-2941.2001

10.3354/ame048141

10.5194/bg-4-297-2007

10.1111/j.1365-2699.2008.02046.x

10.1073/pnas.0602399103

10.1073/pnas.0803070105

Hubbell S.P., 2001, The Unified Neutral Theory of Biodiversity and Biogeography

10.1111/j.0269-8463.2005.00965.x

10.1890/0012-9658(2006)87[1387:NTATEO]2.0.CO;2

Kofoid C.A., 1929, A conspectus of the marine and freshwater Ciliata belonging to the suborder Tintinnoinea, with descriptions of new species principally from the Agassiz Expedition to the eastern tropical Pacific 1904–1905, Univ Calif Publ Zool, 34, 1

Kofoid C.A., 1939, Reports on the scientific results of the expedition to the eastern tropical Pacific, Bull Mus Comp Zool Harv, 84, 1

10.1038/35054537

10.1073/pnas.0611525104

10.1186/1471-2105-7-371

10.1128/AEM.01996-06

10.1111/j.1461-0248.2007.01094.x

10.3354/meps144265

Magurran A.E., 2004, Measuring Biological Diversity

10.1038/nature01547

10.1093/bioinformatics/bth490

10.1016/j.mib.2008.04.004

Maynard Smith J., 1992, Analysing the mosaic structure of genes, J Mol Evol, 34, 126

10.1038/35054541

10.1111/j.1462-2920.2007.01247.x

10.1111/j.1463-6409.2009.00419.x

10.1006/viro.1999.0056

10.1016/j.tim.2006.04.007

10.1093/oxfordjournals.molbev.a004129

10.1016/S0169-5347(00)02026-7

10.1111/j.0908-8857.2004.03297.x

10.1093/plankt/fbn111

10.1007/s00248-006-9141-x

10.1073/pnas.0605127103

10.3354/meps114303

Thông tin
Thông tin xuất bản

Wiley

Tập 12 Số 4

886-898

Thông tin tác giả