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Mineral weathering and soil development in the earliest land plant ecosystems

Ria Mitchell Orcid Logo, Javier Cuadros, Jeffrey G. Duckett, Silvia Pressel, Christian Mavris, Dan Sykes, Jens Najorka, Gregory D. Edgecombe, Paul Kenrick

Geology, Volume: 44, Issue: 12, Pages: 1007 - 1010

Swansea University Author: Ria Mitchell Orcid Logo

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DOI (Published version): 10.1130/G38449.1

Abstract

Land colonization by plants and their fungal and bacterial symbionts during the Paleozoic was fundamental to the evolution of terrestrial ecosystems, but how these early communities influenced mineral weathering and soil development remains largely unknown. We investigated cryptogamic ground covers...

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Published in: Geology
ISSN: 0091-7613 1943-2682
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa51053
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spelling 2019-08-07T11:26:51.5701194 v2 51053 2019-07-10 Mineral weathering and soil development in the earliest land plant ecosystems fcfffafbafb0036c483338f839df45e5 0000-0002-6328-3998 Ria Mitchell Ria Mitchell true false 2019-07-10 Land colonization by plants and their fungal and bacterial symbionts during the Paleozoic was fundamental to the evolution of terrestrial ecosystems, but how these early communities influenced mineral weathering and soil development remains largely unknown. We investigated cryptogamic ground covers (CGCs) in Iceland to identify modern analogous communities and to characterize soil structure and biologically mediated weathering features. Using a novel application of X-ray microcomputed tomography, we show that moss-dominated CGCs and their soils are not adequate analogues of early communities. Comparisons with the 407 Ma Rhynie Chert (Scotland) biota indicate that modern CGCs dominated by lichens, liverworts, and their associated symbionts (fungi, cyanobacteria) are more representative of early soil-forming communities. Liverwort and lichen soils are thin, and their depth and complexity are constrained by the size and growth form of the dominant plants or lichens. They are aggregated and stabilized by cyanobacteria, mycorrhizal and lichenized fungi, rhizoids, and associated exudates. Smectite was associated with liverwort but not with moss CGC soils. Soil grain dissolution features are diverse and attributable to different organisms (e.g., bacteria, fungi) and types of interaction (e.g., symbiosis). We postulate that such features provide a novel indirect means of inferring biotic interactions in paleosols. Journal Article Geology 44 12 1007 1010 0091-7613 1943-2682 1 12 2016 2016-12-01 10.1130/G38449.1 COLLEGE NANME COLLEGE CODE Swansea University 2019-08-07T11:26:51.5701194 2019-07-10T14:55:45.0725625 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Ria Mitchell 0000-0002-6328-3998 1 Javier Cuadros 2 Jeffrey G. Duckett 3 Silvia Pressel 4 Christian Mavris 5 Dan Sykes 6 Jens Najorka 7 Gregory D. Edgecombe 8 Paul Kenrick 9
title Mineral weathering and soil development in the earliest land plant ecosystems
spellingShingle Mineral weathering and soil development in the earliest land plant ecosystems
Ria Mitchell
title_short Mineral weathering and soil development in the earliest land plant ecosystems
title_full Mineral weathering and soil development in the earliest land plant ecosystems
title_fullStr Mineral weathering and soil development in the earliest land plant ecosystems
title_full_unstemmed Mineral weathering and soil development in the earliest land plant ecosystems
title_sort Mineral weathering and soil development in the earliest land plant ecosystems
author_id_str_mv fcfffafbafb0036c483338f839df45e5
author_id_fullname_str_mv fcfffafbafb0036c483338f839df45e5_***_Ria Mitchell
author Ria Mitchell
author2 Ria Mitchell
Javier Cuadros
Jeffrey G. Duckett
Silvia Pressel
Christian Mavris
Dan Sykes
Jens Najorka
Gregory D. Edgecombe
Paul Kenrick
format Journal article
container_title Geology
container_volume 44
container_issue 12
container_start_page 1007
publishDate 2016
institution Swansea University
issn 0091-7613
1943-2682
doi_str_mv 10.1130/G38449.1
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 0
active_str 0
description Land colonization by plants and their fungal and bacterial symbionts during the Paleozoic was fundamental to the evolution of terrestrial ecosystems, but how these early communities influenced mineral weathering and soil development remains largely unknown. We investigated cryptogamic ground covers (CGCs) in Iceland to identify modern analogous communities and to characterize soil structure and biologically mediated weathering features. Using a novel application of X-ray microcomputed tomography, we show that moss-dominated CGCs and their soils are not adequate analogues of early communities. Comparisons with the 407 Ma Rhynie Chert (Scotland) biota indicate that modern CGCs dominated by lichens, liverworts, and their associated symbionts (fungi, cyanobacteria) are more representative of early soil-forming communities. Liverwort and lichen soils are thin, and their depth and complexity are constrained by the size and growth form of the dominant plants or lichens. They are aggregated and stabilized by cyanobacteria, mycorrhizal and lichenized fungi, rhizoids, and associated exudates. Smectite was associated with liverwort but not with moss CGC soils. Soil grain dissolution features are diverse and attributable to different organisms (e.g., bacteria, fungi) and types of interaction (e.g., symbiosis). We postulate that such features provide a novel indirect means of inferring biotic interactions in paleosols.
published_date 2016-12-01T19:45:44Z
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score 11.04748

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