Recovery of Antarctic stream epilithon from simulated scouring events
Abstract Microbial mats are common in polar streams and often dominate benthic biomass. Climate change may be enhancing the variability of stream flows in the Antarctic, but so far studies investigating mat responses to disturbance have been limited in this region. Mat regrowth was evaluated followi...
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crcambridgeupr:10.1017/s0954102015000024 2024-03-03T08:38:27+00:00 Recovery of Antarctic stream epilithon from simulated scouring events Kohler, Tyler J. Chatfield, Ethan Gooseff, Michael N. Barrett, John E. McKnight, Diane M. 2015 http://dx.doi.org/10.1017/s0954102015000024 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102015000024 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 27, issue 4, page 341-354 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2015 crcambridgeupr https://doi.org/10.1017/s0954102015000024 2024-02-08T08:33:05Z Abstract Microbial mats are common in polar streams and often dominate benthic biomass. Climate change may be enhancing the variability of stream flows in the Antarctic, but so far studies investigating mat responses to disturbance have been limited in this region. Mat regrowth was evaluated following disturbance by experimentally scouring rocks from an ephemeral McMurdo Dry Valley stream over two summers (2001–02 and 2012–13). Mats were sampled at the beginning and resampled at the end of the flow season. In 2012–13, mats were additionally resampled mid-season along with previously undisturbed controls. In 2001–02 rocks regained 47% of chlorophyll a and 40% of ash-free dry mass by the end of the summer, while in 2012–13 rocks regrew 18% and 27%, respectively. Mat stoichiometry differed between summers, and reflected differences in biomass and discharge. Oscillatoria spp. were greatest on scoured rocks and Phormidium spp. on undisturbed rocks. Small diatoms Humidophila and Fistulifera spp. increased throughout the summer in all mats, with the latter more abundant in scoured communities. Collectively, these data suggest that mats are variable intra-annually, responsive to hydrology and require multiple summers to regrow initial biomass once lost. These results will aid the interpretation of long-term data, as well as inform Antarctic Specially Managed Area protocols. Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Cambridge University Press Antarctic The Antarctic Antarctic Science 27 4 341 354 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Kohler, Tyler J. Chatfield, Ethan Gooseff, Michael N. Barrett, John E. McKnight, Diane M. Recovery of Antarctic stream epilithon from simulated scouring events |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract Microbial mats are common in polar streams and often dominate benthic biomass. Climate change may be enhancing the variability of stream flows in the Antarctic, but so far studies investigating mat responses to disturbance have been limited in this region. Mat regrowth was evaluated following disturbance by experimentally scouring rocks from an ephemeral McMurdo Dry Valley stream over two summers (2001–02 and 2012–13). Mats were sampled at the beginning and resampled at the end of the flow season. In 2012–13, mats were additionally resampled mid-season along with previously undisturbed controls. In 2001–02 rocks regained 47% of chlorophyll a and 40% of ash-free dry mass by the end of the summer, while in 2012–13 rocks regrew 18% and 27%, respectively. Mat stoichiometry differed between summers, and reflected differences in biomass and discharge. Oscillatoria spp. were greatest on scoured rocks and Phormidium spp. on undisturbed rocks. Small diatoms Humidophila and Fistulifera spp. increased throughout the summer in all mats, with the latter more abundant in scoured communities. Collectively, these data suggest that mats are variable intra-annually, responsive to hydrology and require multiple summers to regrow initial biomass once lost. These results will aid the interpretation of long-term data, as well as inform Antarctic Specially Managed Area protocols. |
format |
Article in Journal/Newspaper |
author |
Kohler, Tyler J. Chatfield, Ethan Gooseff, Michael N. Barrett, John E. McKnight, Diane M. |
author_facet |
Kohler, Tyler J. Chatfield, Ethan Gooseff, Michael N. Barrett, John E. McKnight, Diane M. |
author_sort |
Kohler, Tyler J. |
title |
Recovery of Antarctic stream epilithon from simulated scouring events |
title_short |
Recovery of Antarctic stream epilithon from simulated scouring events |
title_full |
Recovery of Antarctic stream epilithon from simulated scouring events |
title_fullStr |
Recovery of Antarctic stream epilithon from simulated scouring events |
title_full_unstemmed |
Recovery of Antarctic stream epilithon from simulated scouring events |
title_sort |
recovery of antarctic stream epilithon from simulated scouring events |
publisher |
Cambridge University Press (CUP) |
publishDate |
2015 |
url |
http://dx.doi.org/10.1017/s0954102015000024 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102015000024 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Science |
genre_facet |
Antarc* Antarctic Antarctic Science |
op_source |
Antarctic Science volume 27, issue 4, page 341-354 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102015000024 |
container_title |
Antarctic Science |
container_volume |
27 |
container_issue |
4 |
container_start_page |
341 |
op_container_end_page |
354 |
_version_ |
1792506848232865792 |