Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding
The Antarctic region plays a key role in regulating the Earth’s climate and contains a unique record of environmental change. Foraminifera, a group of shell-bearing protists, are widely used as paleoenvironmental proxies. However, core-based reconstructions of Antarctic paleoenvironments are often h...
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ftdoajarticles:oai:doaj.org/article:b9c25849a6a749248af77d7c0200b085 2023-05-15T13:32:49+02:00 Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding Qingxia Li Yanli Lei Haotian Li Tiegang Li 2023-02-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1089482 https://doaj.org/article/b9c25849a6a749248af77d7c0200b085 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1089482/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1089482 https://doaj.org/article/b9c25849a6a749248af77d7c0200b085 Frontiers in Marine Science, Vol 10 (2023) foraminifera polar region environmental change paleoenvironmental reconstruction biogeographical pattern Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1089482 2023-02-05T01:26:30Z The Antarctic region plays a key role in regulating the Earth’s climate and contains a unique record of environmental change. Foraminifera, a group of shell-bearing protists, are widely used as paleoenvironmental proxies. However, core-based reconstructions of Antarctic paleoenvironments are often hindered by the lack of foraminiferal fossil record. Foraminiferal ancient DNA provides new avenues for understanding environmental change, but the correlation between molecular ecological features of foraminifera and environmental conditions remains poorly understood. Here, we obtained surface sediment samples from the Southern Ocean at water depths ranging from 50 to 4399 m and measured eight environmental variables. We generated a DNA metabarcoding dataset of foraminifera and presented the first assessment of relationships between foraminiferal molecular diversity and environmental variables in the Antarctic region. The results showed that the alpha diversity of whole community and abundant subcommunity was positively correlated with water depth and negatively correlated with temperature, chlorophyll a and pheophytin a, while the alpha diversity of rare subcommunity had no linear correlation with the above environmental variables. Both rare and abundant foraminiferal subcommunities exhibited distance-decay relationships, but only the beta diversity of rare subcommunity showed a significant positive correlation with water depth. This study reveals contrasting biogeographical patterns of abundant and rare foraminifera and their different correlations with Antarctic environmental variables, holding promise to provide more proxies for reconstructing past environments using foraminiferal ancient DNA and more information for predicting the impact of future environmental changes on polar biodiversity. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
foraminifera polar region environmental change paleoenvironmental reconstruction biogeographical pattern Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
foraminifera polar region environmental change paleoenvironmental reconstruction biogeographical pattern Science Q General. Including nature conservation geographical distribution QH1-199.5 Qingxia Li Yanli Lei Haotian Li Tiegang Li Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding |
topic_facet |
foraminifera polar region environmental change paleoenvironmental reconstruction biogeographical pattern Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The Antarctic region plays a key role in regulating the Earth’s climate and contains a unique record of environmental change. Foraminifera, a group of shell-bearing protists, are widely used as paleoenvironmental proxies. However, core-based reconstructions of Antarctic paleoenvironments are often hindered by the lack of foraminiferal fossil record. Foraminiferal ancient DNA provides new avenues for understanding environmental change, but the correlation between molecular ecological features of foraminifera and environmental conditions remains poorly understood. Here, we obtained surface sediment samples from the Southern Ocean at water depths ranging from 50 to 4399 m and measured eight environmental variables. We generated a DNA metabarcoding dataset of foraminifera and presented the first assessment of relationships between foraminiferal molecular diversity and environmental variables in the Antarctic region. The results showed that the alpha diversity of whole community and abundant subcommunity was positively correlated with water depth and negatively correlated with temperature, chlorophyll a and pheophytin a, while the alpha diversity of rare subcommunity had no linear correlation with the above environmental variables. Both rare and abundant foraminiferal subcommunities exhibited distance-decay relationships, but only the beta diversity of rare subcommunity showed a significant positive correlation with water depth. This study reveals contrasting biogeographical patterns of abundant and rare foraminifera and their different correlations with Antarctic environmental variables, holding promise to provide more proxies for reconstructing past environments using foraminiferal ancient DNA and more information for predicting the impact of future environmental changes on polar biodiversity. |
format |
Article in Journal/Newspaper |
author |
Qingxia Li Yanli Lei Haotian Li Tiegang Li |
author_facet |
Qingxia Li Yanli Lei Haotian Li Tiegang Li |
author_sort |
Qingxia Li |
title |
Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding |
title_short |
Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding |
title_full |
Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding |
title_fullStr |
Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding |
title_full_unstemmed |
Distinct responses of abundant and rare foraminifera to environmental variables in the Antarctic region revealed by DNA metabarcoding |
title_sort |
distinct responses of abundant and rare foraminifera to environmental variables in the antarctic region revealed by dna metabarcoding |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1089482 https://doaj.org/article/b9c25849a6a749248af77d7c0200b085 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1089482/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1089482 https://doaj.org/article/b9c25849a6a749248af77d7c0200b085 |
op_doi |
https://doi.org/10.3389/fmars.2023.1089482 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1766036327534428160 |