Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic
We have investigated how the microbially-driven processes of carbon (C) mineralization (respiration) and nitrogen (N) mineralization/immobilization in a soil from the northern Maritime Antarctic respond to differences in water availability (20% and 80% water-holding capacity) and temperature (5°C an...
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ftunivpalermo:oai:iris.unipa.it:10447/99529 2024-02-11T09:58:45+01:00 Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic Sun, B Dennis, PG Ord, VJ Rushton, SP O'Donnel, AG Newsham, KK Hopkins, DW LAUDICINA, Vito Armando Sun, B Dennis, PG Laudicina, VA Ord, VJ Rushton, SP O'Donnel, AG Newsham, KK Hopkins, DW 2014 http://hdl.handle.net/10447/99529 https://doi.org/10.1017/S0954102014000030 http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9332934&fulltextType=RA&fileId=S0954102014000030 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000344735300006 volume:26 numberofpages:8 journal:ANTARCTIC SCIENCE http://hdl.handle.net/10447/99529 doi:10.1017/S0954102014000030 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84906826212 http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9332934&fulltextType=RA&fileId=S0954102014000030 info:eu-repo/semantics/closedAccess carbon mineralization nitrogen mineralization organic substrates soil respiration warming water addition Settore AGR/13 - Chimica Agraria info:eu-repo/semantics/article 2014 ftunivpalermo https://doi.org/10.1017/S0954102014000030 2024-01-23T23:25:25Z We have investigated how the microbially-driven processes of carbon (C) mineralization (respiration) and nitrogen (N) mineralization/immobilization in a soil from the northern Maritime Antarctic respond to differences in water availability (20% and 80% water-holding capacity) and temperature (5°C and 15°C) in the presence and absence of different organic substrates (2 mg C as either glucose, glycine or tryptone soy broth (TSB) powder (a complex microbial growth medium)) in a controlled laboratory experiment over 175 days. Soil respiration and N mineralization/immobilization in the presence of a C-rich substrate (glucose) increased with increases in water and temperature. These factors were influential individually and had an additive effect when applied together. For the N-rich substrates (glycine and TSB), microbial responses to increased water or temperature alone were weak or not significant, but these factors interacted to give significantly positive increases when applied together. These data indicate that under the expected changes in environmental conditions in the Maritime Antarctic, where temperature and the availability of water and organic substrates will probably increase, soil microbial activity will lead to more rapid C and N cycling and have a positive feedback on these biogeochemical processes, particularly where or when these factors increase concurrently. Article in Journal/Newspaper Antarc* Antarctic Signy Island South Orkney Islands IRIS Università degli Studi di Palermo Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Antarctic Science 26 5 513 520 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Palermo |
op_collection_id |
ftunivpalermo |
language |
English |
topic |
carbon mineralization nitrogen mineralization organic substrates soil respiration warming water addition Settore AGR/13 - Chimica Agraria |
spellingShingle |
carbon mineralization nitrogen mineralization organic substrates soil respiration warming water addition Settore AGR/13 - Chimica Agraria Sun, B Dennis, PG Ord, VJ Rushton, SP O'Donnel, AG Newsham, KK Hopkins, DW LAUDICINA, Vito Armando Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic |
topic_facet |
carbon mineralization nitrogen mineralization organic substrates soil respiration warming water addition Settore AGR/13 - Chimica Agraria |
description |
We have investigated how the microbially-driven processes of carbon (C) mineralization (respiration) and nitrogen (N) mineralization/immobilization in a soil from the northern Maritime Antarctic respond to differences in water availability (20% and 80% water-holding capacity) and temperature (5°C and 15°C) in the presence and absence of different organic substrates (2 mg C as either glucose, glycine or tryptone soy broth (TSB) powder (a complex microbial growth medium)) in a controlled laboratory experiment over 175 days. Soil respiration and N mineralization/immobilization in the presence of a C-rich substrate (glucose) increased with increases in water and temperature. These factors were influential individually and had an additive effect when applied together. For the N-rich substrates (glycine and TSB), microbial responses to increased water or temperature alone were weak or not significant, but these factors interacted to give significantly positive increases when applied together. These data indicate that under the expected changes in environmental conditions in the Maritime Antarctic, where temperature and the availability of water and organic substrates will probably increase, soil microbial activity will lead to more rapid C and N cycling and have a positive feedback on these biogeochemical processes, particularly where or when these factors increase concurrently. |
author2 |
Sun, B Dennis, PG Laudicina, VA Ord, VJ Rushton, SP O'Donnel, AG Newsham, KK Hopkins, DW |
format |
Article in Journal/Newspaper |
author |
Sun, B Dennis, PG Ord, VJ Rushton, SP O'Donnel, AG Newsham, KK Hopkins, DW LAUDICINA, Vito Armando |
author_facet |
Sun, B Dennis, PG Ord, VJ Rushton, SP O'Donnel, AG Newsham, KK Hopkins, DW LAUDICINA, Vito Armando |
author_sort |
Sun, B |
title |
Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic |
title_short |
Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic |
title_full |
Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic |
title_fullStr |
Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic |
title_full_unstemmed |
Biogeochemical responses to nutrient, moisture and temperature manipulations of soil from Signy Island, South Orkney Islands in the Maritime Antarctic |
title_sort |
biogeochemical responses to nutrient, moisture and temperature manipulations of soil from signy island, south orkney islands in the maritime antarctic |
publishDate |
2014 |
url |
http://hdl.handle.net/10447/99529 https://doi.org/10.1017/S0954102014000030 http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9332934&fulltextType=RA&fileId=S0954102014000030 |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Signy Island South Orkney Islands |
geographic_facet |
Antarctic Signy Island South Orkney Islands |
genre |
Antarc* Antarctic Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctic Signy Island South Orkney Islands |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000344735300006 volume:26 numberofpages:8 journal:ANTARCTIC SCIENCE http://hdl.handle.net/10447/99529 doi:10.1017/S0954102014000030 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84906826212 http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9332934&fulltextType=RA&fileId=S0954102014000030 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1017/S0954102014000030 |
container_title |
Antarctic Science |
container_volume |
26 |
container_issue |
5 |
container_start_page |
513 |
op_container_end_page |
520 |
_version_ |
1790594502830850048 |