Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes
Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events. We investigated the relative ability of three Antarctic moss species to tolerate physiological extremes in water availability and identified physiologic...
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ftunivqespace:oai:espace.library.uq.edu.au:UQ:80895 2023-05-15T13:47:20+02:00 Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes Wasley, J. Robinson, S. A. Lovelock, C. E. Popp, M. Dr Amanda Ellery 2006-01-01 https://espace.library.uq.edu.au/view/UQ:80895 eng eng Csiro Publishing doi:10.1071/FP05306 issn:1445-4408 orcid:0000-0002-2219-6855 Antarctica Chlorophyll Fluorescence Climate Change Desiccation Delta C-13 Fatty Acids Soluble Carbohydrates Submergence Plant Sciences Carbon-isotope Discrimination Continental Antarctica Desiccation Tolerance Pigment Composition Sugar Content Plants Moss Photosynthesis Carbohydrate Dehydration 300804 Environmental Impact Assessment C1 771103 Living resources (flora and fauna) Journal Article 2006 ftunivqespace https://doi.org/10.1071/FP05306 2020-08-04T03:50:42Z Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events. We investigated the relative ability of three Antarctic moss species to tolerate physiological extremes in water availability and identified physiological, morphological, and biochemical characteristics that assist species performance under such conditions. Tolerance of desiccation and submergence was investigated using chlorophyll fluorescence during a series of field- and laboratory-based water stress events. Turf water retention and degree of natural habitat submergence were determined from gametophyte shoot size and density, and delta C-13 signatures, respectively. Finally, compounds likely to assist membrane structure and function during desiccation events (fatty acids and soluble carbohydrates) were determined. The results of this study show significant differences in the performance of the three study species under contrasting water stress events. The results indicate that the three study species occupy distinctly different ecological niches with respect to water relations, and provide a physiological explanation for present species distributions. The poor tolerance of submergence seen in Ceratodon purpureus helps explain its restriction to drier sites and conversely, the low tolerance of desiccation and high tolerance of submergence displayed by the endemic Grimmia antarctici is consistent with its restriction to wet habitats. Finally the flexible response observed for Bryum pseudotriquetrum is consistent with its co-occurrence with the other two species across the bryophyte habitat spectrum. The likely effects of future climate change induced shifts in water availability are discussed with respect to future community dynamics. Article in Journal/Newspaper Antarc* Antarctic Antarctica Grimmia antarctici The University of Queensland: UQ eSpace Antarctic Functional Plant Biology 33 5 443 |
institution |
Open Polar |
collection |
The University of Queensland: UQ eSpace |
op_collection_id |
ftunivqespace |
language |
English |
topic |
Antarctica Chlorophyll Fluorescence Climate Change Desiccation Delta C-13 Fatty Acids Soluble Carbohydrates Submergence Plant Sciences Carbon-isotope Discrimination Continental Antarctica Desiccation Tolerance Pigment Composition Sugar Content Plants Moss Photosynthesis Carbohydrate Dehydration 300804 Environmental Impact Assessment C1 771103 Living resources (flora and fauna) |
spellingShingle |
Antarctica Chlorophyll Fluorescence Climate Change Desiccation Delta C-13 Fatty Acids Soluble Carbohydrates Submergence Plant Sciences Carbon-isotope Discrimination Continental Antarctica Desiccation Tolerance Pigment Composition Sugar Content Plants Moss Photosynthesis Carbohydrate Dehydration 300804 Environmental Impact Assessment C1 771103 Living resources (flora and fauna) Wasley, J. Robinson, S. A. Lovelock, C. E. Popp, M. Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes |
topic_facet |
Antarctica Chlorophyll Fluorescence Climate Change Desiccation Delta C-13 Fatty Acids Soluble Carbohydrates Submergence Plant Sciences Carbon-isotope Discrimination Continental Antarctica Desiccation Tolerance Pigment Composition Sugar Content Plants Moss Photosynthesis Carbohydrate Dehydration 300804 Environmental Impact Assessment C1 771103 Living resources (flora and fauna) |
description |
Antarctic bryophyte communities presently tolerate physiological extremes in water availability, surviving both desiccation and submergence events. We investigated the relative ability of three Antarctic moss species to tolerate physiological extremes in water availability and identified physiological, morphological, and biochemical characteristics that assist species performance under such conditions. Tolerance of desiccation and submergence was investigated using chlorophyll fluorescence during a series of field- and laboratory-based water stress events. Turf water retention and degree of natural habitat submergence were determined from gametophyte shoot size and density, and delta C-13 signatures, respectively. Finally, compounds likely to assist membrane structure and function during desiccation events (fatty acids and soluble carbohydrates) were determined. The results of this study show significant differences in the performance of the three study species under contrasting water stress events. The results indicate that the three study species occupy distinctly different ecological niches with respect to water relations, and provide a physiological explanation for present species distributions. The poor tolerance of submergence seen in Ceratodon purpureus helps explain its restriction to drier sites and conversely, the low tolerance of desiccation and high tolerance of submergence displayed by the endemic Grimmia antarctici is consistent with its restriction to wet habitats. Finally the flexible response observed for Bryum pseudotriquetrum is consistent with its co-occurrence with the other two species across the bryophyte habitat spectrum. The likely effects of future climate change induced shifts in water availability are discussed with respect to future community dynamics. |
author2 |
Dr Amanda Ellery |
format |
Article in Journal/Newspaper |
author |
Wasley, J. Robinson, S. A. Lovelock, C. E. Popp, M. |
author_facet |
Wasley, J. Robinson, S. A. Lovelock, C. E. Popp, M. |
author_sort |
Wasley, J. |
title |
Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes |
title_short |
Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes |
title_full |
Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes |
title_fullStr |
Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes |
title_full_unstemmed |
Some like it wet - biological characteristics underpinning tolerance of extreme water stress events in Antarctic bryophytes |
title_sort |
some like it wet - biological characteristics underpinning tolerance of extreme water stress events in antarctic bryophytes |
publisher |
Csiro Publishing |
publishDate |
2006 |
url |
https://espace.library.uq.edu.au/view/UQ:80895 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica Grimmia antarctici |
genre_facet |
Antarc* Antarctic Antarctica Grimmia antarctici |
op_relation |
doi:10.1071/FP05306 issn:1445-4408 orcid:0000-0002-2219-6855 |
op_doi |
https://doi.org/10.1071/FP05306 |
container_title |
Functional Plant Biology |
container_volume |
33 |
container_issue |
5 |
container_start_page |
443 |
_version_ |
1766246938434338816 |