Photosynthetic responses of three common mosses from continental Antarctica
Predicting the effects of climate change on Antarctic terrestrial vegetation requires a better knowledge of the ecophysiology of common moss species. In this paper we provide a comprehensive matrix for photosynthesis and major environmental parameters for three dominant Antarctic moss species ( Bryu...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2005
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102005002774 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002774 |
id |
crcambridgeupr:10.1017/s0954102005002774 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102005002774 2024-06-23T07:47:04+00:00 Photosynthetic responses of three common mosses from continental Antarctica PANNEWITZ, STEFAN GREEN, T.G. ALLAN MAYSEK, KADMIEL SCHLENSOG, MARK SEPPELT, ROD SANCHO, LEOPOLDO G. TÜRK, ROMAN SCHROETER, BURKHARD 2005 http://dx.doi.org/10.1017/s0954102005002774 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002774 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 17, issue 3, page 341-352 ISSN 0954-1020 1365-2079 journal-article 2005 crcambridgeupr https://doi.org/10.1017/s0954102005002774 2024-06-12T04:04:39Z Predicting the effects of climate change on Antarctic terrestrial vegetation requires a better knowledge of the ecophysiology of common moss species. In this paper we provide a comprehensive matrix for photosynthesis and major environmental parameters for three dominant Antarctic moss species ( Bryum subrotundifolium, B. pseudotriquetrum and Ceratodon purpureus ). Using locations in southern Victoria Land, (Granite Harbour, 77°S) and northern Victoria Land (Cape Hallett, 72°S) we determined the responses of net photosynthesis and dark respiration to thallus water content, thallus temperature, photosynthetic photon flux densities and CO 2 concentration over several summer seasons. The studies also included microclimate recordings at all sites where the research was carried out in field laboratories. Plant temperature was influenced predominantly by the water regime at the site with dry mosses being warmer. Optimal temperatures for net photosynthesis were 13.7°C, 12.0°C and 6.6°C for B. subrotundifolium, B. pseudotriquetrum and C. purpureus , respectively and fall within the known range for Antarctic mosses. Maximal net photosynthesis at 10°C ranked as B. subrotundifolium > B. pseudotriquetrum > C. purpureus . Net photosynthesis was strongly depressed at subzero temperatures but was substantial at 0°C. Net photosynthesis of the mosses was not saturated by light at optimal water content and thallus temperature. Response of net photosynthesis to increase in water content was as expected for mosses although B. subrotundifolium showed a large depression (60%) at the highest hydrations. Net photosynthesis of both B. subrotundifolium and B. pseudotriquetrum showed a large response to increase in CO 2 concentration and this rose with increase in temperature; saturation was not reached for B. pseudotriquetrum at 20°C. There was a high level of variability for species at the same sites in different years and between different locations. This was substantial enough to make prediction of the effects of climate change ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica Victoria Land Cambridge University Press Antarctic Cape Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Granite Harbour ENVELOPE(162.733,162.733,-76.883,-76.883) Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Victoria Land Antarctic Science 17 3 341 352 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Predicting the effects of climate change on Antarctic terrestrial vegetation requires a better knowledge of the ecophysiology of common moss species. In this paper we provide a comprehensive matrix for photosynthesis and major environmental parameters for three dominant Antarctic moss species ( Bryum subrotundifolium, B. pseudotriquetrum and Ceratodon purpureus ). Using locations in southern Victoria Land, (Granite Harbour, 77°S) and northern Victoria Land (Cape Hallett, 72°S) we determined the responses of net photosynthesis and dark respiration to thallus water content, thallus temperature, photosynthetic photon flux densities and CO 2 concentration over several summer seasons. The studies also included microclimate recordings at all sites where the research was carried out in field laboratories. Plant temperature was influenced predominantly by the water regime at the site with dry mosses being warmer. Optimal temperatures for net photosynthesis were 13.7°C, 12.0°C and 6.6°C for B. subrotundifolium, B. pseudotriquetrum and C. purpureus , respectively and fall within the known range for Antarctic mosses. Maximal net photosynthesis at 10°C ranked as B. subrotundifolium > B. pseudotriquetrum > C. purpureus . Net photosynthesis was strongly depressed at subzero temperatures but was substantial at 0°C. Net photosynthesis of the mosses was not saturated by light at optimal water content and thallus temperature. Response of net photosynthesis to increase in water content was as expected for mosses although B. subrotundifolium showed a large depression (60%) at the highest hydrations. Net photosynthesis of both B. subrotundifolium and B. pseudotriquetrum showed a large response to increase in CO 2 concentration and this rose with increase in temperature; saturation was not reached for B. pseudotriquetrum at 20°C. There was a high level of variability for species at the same sites in different years and between different locations. This was substantial enough to make prediction of the effects of climate change ... |
format |
Article in Journal/Newspaper |
author |
PANNEWITZ, STEFAN GREEN, T.G. ALLAN MAYSEK, KADMIEL SCHLENSOG, MARK SEPPELT, ROD SANCHO, LEOPOLDO G. TÜRK, ROMAN SCHROETER, BURKHARD |
spellingShingle |
PANNEWITZ, STEFAN GREEN, T.G. ALLAN MAYSEK, KADMIEL SCHLENSOG, MARK SEPPELT, ROD SANCHO, LEOPOLDO G. TÜRK, ROMAN SCHROETER, BURKHARD Photosynthetic responses of three common mosses from continental Antarctica |
author_facet |
PANNEWITZ, STEFAN GREEN, T.G. ALLAN MAYSEK, KADMIEL SCHLENSOG, MARK SEPPELT, ROD SANCHO, LEOPOLDO G. TÜRK, ROMAN SCHROETER, BURKHARD |
author_sort |
PANNEWITZ, STEFAN |
title |
Photosynthetic responses of three common mosses from continental Antarctica |
title_short |
Photosynthetic responses of three common mosses from continental Antarctica |
title_full |
Photosynthetic responses of three common mosses from continental Antarctica |
title_fullStr |
Photosynthetic responses of three common mosses from continental Antarctica |
title_full_unstemmed |
Photosynthetic responses of three common mosses from continental Antarctica |
title_sort |
photosynthetic responses of three common mosses from continental antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2005 |
url |
http://dx.doi.org/10.1017/s0954102005002774 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102005002774 |
long_lat |
ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(162.733,162.733,-76.883,-76.883) ENVELOPE(170.217,170.217,-72.317,-72.317) |
geographic |
Antarctic Cape Hallett Granite Harbour Hallett Victoria Land |
geographic_facet |
Antarctic Cape Hallett Granite Harbour Hallett Victoria Land |
genre |
Antarc* Antarctic Antarctic Science Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica Victoria Land |
op_source |
Antarctic Science volume 17, issue 3, page 341-352 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102005002774 |
container_title |
Antarctic Science |
container_volume |
17 |
container_issue |
3 |
container_start_page |
341 |
op_container_end_page |
352 |
_version_ |
1802650671185395712 |