Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil?
Subarctic tundra soils store large quantities of the global organic carbon (C) pool as the decomposition of plant litter and soil organic matter is limited by low temperatures and limiting nutrients. Mechanisms that drive organic matter decomposition are still poorly understood due to our limited kn...
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Online Access: | http://urn.fi/URN:NBN:fi:jyu-201612225244 |
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ftjyvaeskylaenun:oai:jyx.jyu.fi:123456789/52570 2024-02-04T10:04:51+01:00 Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? Männistö, Minna Ganzert, Lars Tiirola, Marja Häggblom, Max M. Stark, Sari 2016 216-228 application/pdf http://urn.fi/URN:NBN:fi:jyu-201612225244 eng eng Elsevier Ltd. Soil Biology and Biochemistry 0038-0717 0 96 615146 info:eu-repo/grantAgreement/EC/FP7/615146/EU// 10.1016/j.soilbio.2016.02.012 Euroopan komissio European Commission Männistö, M., Ganzert, L., Tiirola, M., Häggblom, M. M., & Stark, S. (2016). Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil?. Soil Biology and Biochemistry , 96 , 216-228. https://doi.org/10.1016/j.soilbio.2016.02.012 CONVID_25576381 TUTKAID_69337 URN:NBN:fi:jyu-201612225244 http://urn.fi/URN:NBN:fi:jyu-201612225244 © 2016 Elsevier Ltd. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher. openAccess bacterial communities PLFA enzyme activities qPCR next generation sequencing tundra typpi article http://purl.org/eprint/type/JournalArticle http://purl.org/coar/resource_type/c_2df8fbb1 acceptedVersion A1 2016 ftjyvaeskylaenun 2024-01-11T00:03:57Z Subarctic tundra soils store large quantities of the global organic carbon (C) pool as the decomposition of plant litter and soil organic matter is limited by low temperatures and limiting nutrients. Mechanisms that drive organic matter decomposition are still poorly understood due to our limited knowledge of microbial communities and their responses to changing conditions. In subarctic tundra large grazers, in particular reindeer, exert a strong effect on vegetation and nutrient availability causing drastic nutrient pulses in the soils located along the migratory routes. Here we studied the effect of increased nitrogen (N) availability on microbial community structure and activities by laboratory incubations of soil collected from two sites with contrasting grazing intensities. We hypothesized that heavily grazed soil experiencing nutrient pulses harbor more copiotrophic taxa that are able to respond positively to increases in available N leading to increased enzyme activities and respiration. Contrary to our hypothesis, there were only minor differences in the microbial community composition between the lightly and heavily grazed soils. N amendment shifted the bacterial community composition drastically, but the changes were similar at both grazing intensities. The relative abundance of diverse Actinobacteria and Rhodanobacter-affiliated Gammaproteobacteria increased in the N amended microcosms, while the abundance of Acidobacteria, Alphaproteobacteria, Deltaproteobacteria, Verrucomicrobia and Bacteroidetes decreased. Contrary to our hypotheses, increased N availability decreased respiration and microbial biomass at both grazing intensities, while increased N availability had little influence on the extracellular enzyme activities. We propose that similar to what has been reported in other systems, elevated N availability suppressed microbial respiration and biomass by favoring copiotrophic species with faster growth rates and with limited capabilities to decompose recalcitrant organic matter. Similar ... Article in Journal/Newspaper Subarctic Tundra JYX - Jyväskylä University Digital Archive Soil Biology and Biochemistry 96 216 228 |
institution |
Open Polar |
collection |
JYX - Jyväskylä University Digital Archive |
op_collection_id |
ftjyvaeskylaenun |
language |
English |
topic |
bacterial communities PLFA enzyme activities qPCR next generation sequencing tundra typpi |
spellingShingle |
bacterial communities PLFA enzyme activities qPCR next generation sequencing tundra typpi Männistö, Minna Ganzert, Lars Tiirola, Marja Häggblom, Max M. Stark, Sari Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? |
topic_facet |
bacterial communities PLFA enzyme activities qPCR next generation sequencing tundra typpi |
description |
Subarctic tundra soils store large quantities of the global organic carbon (C) pool as the decomposition of plant litter and soil organic matter is limited by low temperatures and limiting nutrients. Mechanisms that drive organic matter decomposition are still poorly understood due to our limited knowledge of microbial communities and their responses to changing conditions. In subarctic tundra large grazers, in particular reindeer, exert a strong effect on vegetation and nutrient availability causing drastic nutrient pulses in the soils located along the migratory routes. Here we studied the effect of increased nitrogen (N) availability on microbial community structure and activities by laboratory incubations of soil collected from two sites with contrasting grazing intensities. We hypothesized that heavily grazed soil experiencing nutrient pulses harbor more copiotrophic taxa that are able to respond positively to increases in available N leading to increased enzyme activities and respiration. Contrary to our hypothesis, there were only minor differences in the microbial community composition between the lightly and heavily grazed soils. N amendment shifted the bacterial community composition drastically, but the changes were similar at both grazing intensities. The relative abundance of diverse Actinobacteria and Rhodanobacter-affiliated Gammaproteobacteria increased in the N amended microcosms, while the abundance of Acidobacteria, Alphaproteobacteria, Deltaproteobacteria, Verrucomicrobia and Bacteroidetes decreased. Contrary to our hypotheses, increased N availability decreased respiration and microbial biomass at both grazing intensities, while increased N availability had little influence on the extracellular enzyme activities. We propose that similar to what has been reported in other systems, elevated N availability suppressed microbial respiration and biomass by favoring copiotrophic species with faster growth rates and with limited capabilities to decompose recalcitrant organic matter. Similar ... |
format |
Article in Journal/Newspaper |
author |
Männistö, Minna Ganzert, Lars Tiirola, Marja Häggblom, Max M. Stark, Sari |
author_facet |
Männistö, Minna Ganzert, Lars Tiirola, Marja Häggblom, Max M. Stark, Sari |
author_sort |
Männistö, Minna |
title |
Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? |
title_short |
Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? |
title_full |
Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? |
title_fullStr |
Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? |
title_full_unstemmed |
Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? |
title_sort |
do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil? |
publisher |
Elsevier Ltd. |
publishDate |
2016 |
url |
http://urn.fi/URN:NBN:fi:jyu-201612225244 |
genre |
Subarctic Tundra |
genre_facet |
Subarctic Tundra |
op_relation |
Soil Biology and Biochemistry 0038-0717 0 96 615146 info:eu-repo/grantAgreement/EC/FP7/615146/EU// 10.1016/j.soilbio.2016.02.012 Euroopan komissio European Commission Männistö, M., Ganzert, L., Tiirola, M., Häggblom, M. M., & Stark, S. (2016). Do shifts in life strategies explain microbial community responses to increasing nitrogen in tundra soil?. Soil Biology and Biochemistry , 96 , 216-228. https://doi.org/10.1016/j.soilbio.2016.02.012 CONVID_25576381 TUTKAID_69337 URN:NBN:fi:jyu-201612225244 http://urn.fi/URN:NBN:fi:jyu-201612225244 |
op_rights |
© 2016 Elsevier Ltd. This is a final draft version of an article whose final and definitive form has been published by Elsevier. Published in this repository with the kind permission of the publisher. openAccess |
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Soil Biology and Biochemistry |
container_volume |
96 |
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216 |
op_container_end_page |
228 |
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1789973588884848640 |