Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south
Protistan pathogens can have devastating effects on marine plants, yet the processes that affect their distributions and infection intensities are poorly understood. Species within the brown algal genus Durvillaea are major ecosystem engineers throughout the sub-Antarctic and cold-temperate Southern...
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/238283 2024-01-14T10:01:52+01:00 Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south Blake, Callum Thiel, Martin Lopez, Boris A. Fraser, Ceridwen application/pdf http://hdl.handle.net/1885/238283 https://doi.org/10.3354/meps12346 https://openresearch-repository.anu.edu.au/bitstream/1885/238283/3/01_Blake_Gall-forming_protistan_2017.pdf.jpg en_AU eng Inter-Research 0171-8630 http://hdl.handle.net/1885/238283 doi:10.3354/meps12346 https://openresearch-repository.anu.edu.au/bitstream/1885/238283/3/01_Blake_Gall-forming_protistan_2017.pdf.jpg © The authors 2017 https://creativecommons.org/licenses/by/4.0/ Creative Commons by Attribution Licence Marine Ecology Progress Series Pathogen Macroalgae Host-specificity Intertidal Dispersal Durvillaea Maullinia Journal article ftanucanberra https://doi.org/10.3354/meps12346 2023-12-15T09:34:52Z Protistan pathogens can have devastating effects on marine plants, yet the processes that affect their distributions and infection intensities are poorly understood. Species within the brown algal genus Durvillaea are major ecosystem engineers throughout the sub-Antarctic and cold-temperate Southern Hemisphere, and a newly described genus of protistan parasite, Maullinia, was recently found infecting D. antarctica in Chile. We set out to address 3 key questions. (1) Is there evidence for trans-oceanic dispersal of Maullinia? (2) Does Maullinia infect other Durvillaea species? (3) Does infection prevalence vary throughout the hosts' ranges? We sampled Maullinia on Durvillaea populations along coasts in Chile (D. antarctica, from 32 to 42 S: 8 sites), Australia (D. potatorum and D. amatheiae, from 36 to 38 S: 5 sites) and sub-Antarctic Marion Island (46 53' 47'' S, 3743' 32'' E). We used a genetic marker (18S rRNA) to verify the presence of Maullinia on Durvillaea at all sites and visual surveys of Maullinia galls to assess infection prevalence in Chile and Australia. We confirm that Maullinia infects Australian Durvillaea species, but our results indicate that each host species is parasitised by a different Maullinia lineage. Maullinia infection prevalence increased with latitude. Long-and short-distance dispersal events are inferred to have occurred based on genetic patterns. We conclude that Maullinia protists are broadly distributed and affect multiple host species, including at least 3 Durvillaea species (2 in Australia, and 1 in both Chile and Marion Island), and that environmental factors influence host susceptibility to infection. This project was funded by Fondecyt grant (CONICYT-FONDECYT 1131082), the Fenner School of Environment and Society at the Australian Nat - ional University and a PhD fellowship Beca CONICYTPCHA/DoctoradoNacional/2014-21140010 to B.A.L. Article in Journal/Newspaper Antarc* Antarctic Antarctica Marion Island Southern Ocean Australian National University: ANU Digital Collections Antarctic Southern Ocean Marine Ecology Progress Series 583 95 106 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
topic |
Pathogen Macroalgae Host-specificity Intertidal Dispersal Durvillaea Maullinia |
spellingShingle |
Pathogen Macroalgae Host-specificity Intertidal Dispersal Durvillaea Maullinia Blake, Callum Thiel, Martin Lopez, Boris A. Fraser, Ceridwen Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south |
topic_facet |
Pathogen Macroalgae Host-specificity Intertidal Dispersal Durvillaea Maullinia |
description |
Protistan pathogens can have devastating effects on marine plants, yet the processes that affect their distributions and infection intensities are poorly understood. Species within the brown algal genus Durvillaea are major ecosystem engineers throughout the sub-Antarctic and cold-temperate Southern Hemisphere, and a newly described genus of protistan parasite, Maullinia, was recently found infecting D. antarctica in Chile. We set out to address 3 key questions. (1) Is there evidence for trans-oceanic dispersal of Maullinia? (2) Does Maullinia infect other Durvillaea species? (3) Does infection prevalence vary throughout the hosts' ranges? We sampled Maullinia on Durvillaea populations along coasts in Chile (D. antarctica, from 32 to 42 S: 8 sites), Australia (D. potatorum and D. amatheiae, from 36 to 38 S: 5 sites) and sub-Antarctic Marion Island (46 53' 47'' S, 3743' 32'' E). We used a genetic marker (18S rRNA) to verify the presence of Maullinia on Durvillaea at all sites and visual surveys of Maullinia galls to assess infection prevalence in Chile and Australia. We confirm that Maullinia infects Australian Durvillaea species, but our results indicate that each host species is parasitised by a different Maullinia lineage. Maullinia infection prevalence increased with latitude. Long-and short-distance dispersal events are inferred to have occurred based on genetic patterns. We conclude that Maullinia protists are broadly distributed and affect multiple host species, including at least 3 Durvillaea species (2 in Australia, and 1 in both Chile and Marion Island), and that environmental factors influence host susceptibility to infection. This project was funded by Fondecyt grant (CONICYT-FONDECYT 1131082), the Fenner School of Environment and Society at the Australian Nat - ional University and a PhD fellowship Beca CONICYTPCHA/DoctoradoNacional/2014-21140010 to B.A.L. |
format |
Article in Journal/Newspaper |
author |
Blake, Callum Thiel, Martin Lopez, Boris A. Fraser, Ceridwen |
author_facet |
Blake, Callum Thiel, Martin Lopez, Boris A. Fraser, Ceridwen |
author_sort |
Blake, Callum |
title |
Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south |
title_short |
Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south |
title_full |
Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south |
title_fullStr |
Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south |
title_full_unstemmed |
Gall-forming protistan parasites infect southern bull kelp across the Southern Ocean, with prevalence increasing to the south |
title_sort |
gall-forming protistan parasites infect southern bull kelp across the southern ocean, with prevalence increasing to the south |
publisher |
Inter-Research |
url |
http://hdl.handle.net/1885/238283 https://doi.org/10.3354/meps12346 https://openresearch-repository.anu.edu.au/bitstream/1885/238283/3/01_Blake_Gall-forming_protistan_2017.pdf.jpg |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Marion Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Marion Island Southern Ocean |
op_source |
Marine Ecology Progress Series |
op_relation |
0171-8630 http://hdl.handle.net/1885/238283 doi:10.3354/meps12346 https://openresearch-repository.anu.edu.au/bitstream/1885/238283/3/01_Blake_Gall-forming_protistan_2017.pdf.jpg |
op_rights |
© The authors 2017 https://creativecommons.org/licenses/by/4.0/ Creative Commons by Attribution Licence |
op_doi |
https://doi.org/10.3354/meps12346 |
container_title |
Marine Ecology Progress Series |
container_volume |
583 |
container_start_page |
95 |
op_container_end_page |
106 |
_version_ |
1788056590033616896 |