Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem
The complex relationship between ecosystem function and soil food web structure is governed by species interactions, many of which remain unmapped. Phagotrophic protists structure soil food webs by grazing the microbiome, yet their involvement in intraguild competition, susceptibility to predator di...
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ftdoajarticles:oai:doaj.org/article:daaebfeefee349d8932444b1de0deae3 2023-05-15T13:34:21+02:00 Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem Andrew R. Thompson Andrea J. Roth-Monzón Zachary T. Aanderud Byron J. Adams 2021-07-01T00:00:00Z https://doi.org/10.3390/microorganisms9081555 https://doaj.org/article/daaebfeefee349d8932444b1de0deae3 EN eng MDPI AG https://www.mdpi.com/2076-2607/9/8/1555 https://doaj.org/toc/2076-2607 doi:10.3390/microorganisms9081555 2076-2607 https://doaj.org/article/daaebfeefee349d8932444b1de0deae3 Microorganisms, Vol 9, Iss 1555, p 1555 (2021) co-occurrence networks Sandona sp Rhogostoma sp McMurdo Dry Valleys Antarctica variation partitioning Biology (General) QH301-705.5 article 2021 ftdoajarticles https://doi.org/10.3390/microorganisms9081555 2022-12-31T05:33:21Z The complex relationship between ecosystem function and soil food web structure is governed by species interactions, many of which remain unmapped. Phagotrophic protists structure soil food webs by grazing the microbiome, yet their involvement in intraguild competition, susceptibility to predator diversity, and grazing preferences are only vaguely known. These species-dependent interactions are contextualized by adjacent biotic and abiotic processes, and thus obfuscated by typically high soil biodiversity. Such questions may be investigated in the McMurdo Dry Valleys (MDV) of Antarctica because the physical environment strongly filters biodiversity and simplifies the influence of abiotic factors. To detect the potential interactions in the MDV, we analyzed the co-occurrence among shotgun metagenome sequences for associations suggestive of intraguild competition, predation, and preferential grazing. In order to control for confounding abiotic drivers, we tested co-occurrence patterns against various climatic and edaphic factors. Non-random co-occurrence between phagotrophic protists and other soil fauna was biotically driven, but we found no support for competition or predation. However, protists predominately associated with Proteobacteria and avoided Actinobacteria, suggesting grazing preferences were modulated by bacterial cell-wall structure and growth rate. Our study provides a critical starting-point for mapping protist interactions in native soils and highlights key trends for future targeted molecular and culture-based approaches. Article in Journal/Newspaper Antarc* Antarctica McMurdo Dry Valleys Directory of Open Access Journals: DOAJ Articles McMurdo Dry Valleys Microorganisms 9 8 1555 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
co-occurrence networks Sandona sp Rhogostoma sp McMurdo Dry Valleys Antarctica variation partitioning Biology (General) QH301-705.5 |
spellingShingle |
co-occurrence networks Sandona sp Rhogostoma sp McMurdo Dry Valleys Antarctica variation partitioning Biology (General) QH301-705.5 Andrew R. Thompson Andrea J. Roth-Monzón Zachary T. Aanderud Byron J. Adams Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem |
topic_facet |
co-occurrence networks Sandona sp Rhogostoma sp McMurdo Dry Valleys Antarctica variation partitioning Biology (General) QH301-705.5 |
description |
The complex relationship between ecosystem function and soil food web structure is governed by species interactions, many of which remain unmapped. Phagotrophic protists structure soil food webs by grazing the microbiome, yet their involvement in intraguild competition, susceptibility to predator diversity, and grazing preferences are only vaguely known. These species-dependent interactions are contextualized by adjacent biotic and abiotic processes, and thus obfuscated by typically high soil biodiversity. Such questions may be investigated in the McMurdo Dry Valleys (MDV) of Antarctica because the physical environment strongly filters biodiversity and simplifies the influence of abiotic factors. To detect the potential interactions in the MDV, we analyzed the co-occurrence among shotgun metagenome sequences for associations suggestive of intraguild competition, predation, and preferential grazing. In order to control for confounding abiotic drivers, we tested co-occurrence patterns against various climatic and edaphic factors. Non-random co-occurrence between phagotrophic protists and other soil fauna was biotically driven, but we found no support for competition or predation. However, protists predominately associated with Proteobacteria and avoided Actinobacteria, suggesting grazing preferences were modulated by bacterial cell-wall structure and growth rate. Our study provides a critical starting-point for mapping protist interactions in native soils and highlights key trends for future targeted molecular and culture-based approaches. |
format |
Article in Journal/Newspaper |
author |
Andrew R. Thompson Andrea J. Roth-Monzón Zachary T. Aanderud Byron J. Adams |
author_facet |
Andrew R. Thompson Andrea J. Roth-Monzón Zachary T. Aanderud Byron J. Adams |
author_sort |
Andrew R. Thompson |
title |
Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem |
title_short |
Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem |
title_full |
Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem |
title_fullStr |
Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem |
title_full_unstemmed |
Phagotrophic Protists and Their Associates: Evidence for Preferential Grazing in an Abiotically Driven Soil Ecosystem |
title_sort |
phagotrophic protists and their associates: evidence for preferential grazing in an abiotically driven soil ecosystem |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/microorganisms9081555 https://doaj.org/article/daaebfeefee349d8932444b1de0deae3 |
geographic |
McMurdo Dry Valleys |
geographic_facet |
McMurdo Dry Valleys |
genre |
Antarc* Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys |
op_source |
Microorganisms, Vol 9, Iss 1555, p 1555 (2021) |
op_relation |
https://www.mdpi.com/2076-2607/9/8/1555 https://doaj.org/toc/2076-2607 doi:10.3390/microorganisms9081555 2076-2607 https://doaj.org/article/daaebfeefee349d8932444b1de0deae3 |
op_doi |
https://doi.org/10.3390/microorganisms9081555 |
container_title |
Microorganisms |
container_volume |
9 |
container_issue |
8 |
container_start_page |
1555 |
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1766051876253466624 |