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Yeast forms dominate fungal diversity in the deep oceans

Yeast forms dominate fungal diversity in the deep oceans
Yeast forms dominate fungal diversity in the deep oceans
Fungi are the principal degraders of biomass in most terrestrial ecosystems. In contrast to surface environments, deep-sea environmental gene libraries have suggested that fungi are rare and non-diverse in high-pressure marine environments. Here, we report the diversity of fungi from 11 deep-sea samples from around the world representing depths from 1500 to 4000?m (146–388?atm) and two shallower water column samples (250 and 500?m). We sequenced 239 clones from 10 fungal-specific 18S rRNA gene libraries constructed from these samples, from which we detected only 18 fungal 18S-types in deep-sea samples. Our phylogenetic analyses show that a total of only 32 fungal 18S-types have so far been recovered from deep-sea habitats, and our results suggest that fungi, in general, are relatively rare in the deep-sea habitats we sampled. The fungal diversity detected suggests that deep-sea environments host an evolutionarily diverse array of fungi dominated by groups of distantly related yeasts, although four putative filamentous fungal 18S-types were detected. The majority of our new sequences branch close to known fungi found in surface environments. This pattern contradicts the proposal that deep-sea and hydrothermal vent habitats represent ancient ecosystems, and demonstrates a history of frequent dispersal between terrestrial and deep-sea habitats
1471-2954
3069-3077
Bass, David
7058c349-be39-4a68-8c41-04efabdc8029
Howe, Alexis
04a50fae-6fc9-4443-b64d-04c5ba410e3a
Brown, Nick
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Barton, Hannah
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Demidova, Maria
0444ad37-1a2b-43cb-bf26-9f1ad025e51c
Michelle, Harlan
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Li, Lily
93d96840-0552-4727-83bc-c5bf35be13c4
Sanders, Holly
e86606a6-d0f6-4579-a8a0-da034ae558ba
Watkinson, Sarah C
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Willcock, Simon
89d9767e-8076-4b21-be9d-a964f5cc85d7
Richards, Thomas A.
5bc939f9-1e7a-4b1c-9454-cef237a9e7b2
Bass, David
7058c349-be39-4a68-8c41-04efabdc8029
Howe, Alexis
04a50fae-6fc9-4443-b64d-04c5ba410e3a
Brown, Nick
3b180870-5116-4d93-9d28-5a0b5e4b04d6
Barton, Hannah
aafbb9c3-e423-4e7a-81b5-1bb5ee3f94c4
Demidova, Maria
0444ad37-1a2b-43cb-bf26-9f1ad025e51c
Michelle, Harlan
e6743450-c326-496a-9bf6-68f81fd56f4e
Li, Lily
93d96840-0552-4727-83bc-c5bf35be13c4
Sanders, Holly
e86606a6-d0f6-4579-a8a0-da034ae558ba
Watkinson, Sarah C
4fd230e2-fc50-4e73-98e4-63ac42a9704d
Willcock, Simon
89d9767e-8076-4b21-be9d-a964f5cc85d7
Richards, Thomas A.
5bc939f9-1e7a-4b1c-9454-cef237a9e7b2

Bass, David, Howe, Alexis, Brown, Nick, Barton, Hannah, Demidova, Maria, Michelle, Harlan, Li, Lily, Sanders, Holly, Watkinson, Sarah C, Willcock, Simon and Richards, Thomas A. (2007) Yeast forms dominate fungal diversity in the deep oceans. Proceedings of the Royal Society B, 274 (1629), 3069-3077. (doi:10.1098/rspb.2007.1067). (PMID:17939990)

Record type: Article

Abstract

Fungi are the principal degraders of biomass in most terrestrial ecosystems. In contrast to surface environments, deep-sea environmental gene libraries have suggested that fungi are rare and non-diverse in high-pressure marine environments. Here, we report the diversity of fungi from 11 deep-sea samples from around the world representing depths from 1500 to 4000?m (146–388?atm) and two shallower water column samples (250 and 500?m). We sequenced 239 clones from 10 fungal-specific 18S rRNA gene libraries constructed from these samples, from which we detected only 18 fungal 18S-types in deep-sea samples. Our phylogenetic analyses show that a total of only 32 fungal 18S-types have so far been recovered from deep-sea habitats, and our results suggest that fungi, in general, are relatively rare in the deep-sea habitats we sampled. The fungal diversity detected suggests that deep-sea environments host an evolutionarily diverse array of fungi dominated by groups of distantly related yeasts, although four putative filamentous fungal 18S-types were detected. The majority of our new sequences branch close to known fungi found in surface environments. This pattern contradicts the proposal that deep-sea and hydrothermal vent habitats represent ancient ecosystems, and demonstrates a history of frequent dispersal between terrestrial and deep-sea habitats

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Published date: December 2007
Organisations: Environmental

Identifiers

Local EPrints ID: 342536
URI: https://eprints.soton.ac.uk/id/eprint/342536
ISSN: 1471-2954
PURE UUID: 97ada552-dd54-47c0-bec2-cf2094abcebb

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Date deposited: 07 Sep 2012 13:56
Last modified: 16 Jul 2019 21:55

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