The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in China
Litters on the forest floor represent an important organic carbon (C) sources from aboveground plants to the soil, which therefore have a significant influence on belowground processes such as soil respiration. In this study, dynamic property of soil respiration was investigated under aboveground li...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Italian Society of Silviculture and Forest Ecology (SISEF)
2019-04-01
|
Series: | iForest - Biogeosciences and Forestry |
Subjects: | |
Online Access: | https://iforest.sisef.org/contents/?id=ifor2812-012 |
id |
doaj-81549c8d6af2489caa83e58ce5f987d9 |
---|---|
record_format |
Article |
spelling |
doaj-81549c8d6af2489caa83e58ce5f987d92020-11-25T00:58:54ZengItalian Society of Silviculture and Forest Ecology (SISEF)iForest - Biogeosciences and Forestry1971-74581971-74582019-04-0112118118610.3832/ifor2812-0122812The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in ChinaYan W0Peng Y1Zhang C2Chen X3College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004 (China)College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004 (China)College of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004 (China)National Engineering Laboratory for Applied Forest Ecological Technology in Southern China, Changsha, Hunan, 410004 (China)Litters on the forest floor represent an important organic carbon (C) sources from aboveground plants to the soil, which therefore have a significant influence on belowground processes such as soil respiration. In this study, dynamic property of soil respiration was investigated under aboveground litter manipulation treatments in a liquidambar forest in subtropical China. The purpose of this study was to examine the impacts of changing aboveground litter inputs on soil CO2 emission in forests. The litter manipulation included litter addition (LA), litter removal (LR) and litter control (LC) treatments. Each litter treatment had six replications. Soil respiration rates were measured using an infrared gas analyzer system (LI-COR 8100) with soil chambers. The results showed that mean soil respiration rates increased significantly in LA plots (mean ± SE: 2.21 ± 0.44 μmol m-2 s-1; P<0.05) and decreased slightly in LR plots (1.17 ± 0.16 μmol m-2 s-1) when compared to control plots (1.42 ± 0.20 μmol m-2 s-1). On average, LA treatment significantly increased annual soil respiration by about 56% (837.5 ± 165 gC m-2 year-1), while LR treatment decreased soil respiration by approximately 17% (443.1 ± 61.7 gC m-2 year-1) compared with the control (535.5 ± 75.7 gC m-2 year-1). The “priming effect” was a primary contributor to the increase of soil respiration in LA treatments and the reduction of soil CO2 efflux was mainly ascribed to the elimination of organic C sources in LR treatments. Soil temperature was the main factor affecting seasonal variation in soil respiration. Up to the 90% to 95% seasonal variation in soil respiration is explained by soil temperature within each of the litter treatments. Our study indicated that changes in litter inputs due to climate change and human practices would significantly affected soil CO2 emission and would subsequently affect C balance in subtropical forests.https://iforest.sisef.org/contents/?id=ifor2812-012Soil CO2 EmissionAnnual Litter InputDeciduous ForestsSoil TemperatureSoil Water ContentsSubtropical China |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yan W Peng Y Zhang C Chen X |
spellingShingle |
Yan W Peng Y Zhang C Chen X The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in China iForest - Biogeosciences and Forestry Soil CO2 Emission Annual Litter Input Deciduous Forests Soil Temperature Soil Water Contents Subtropical China |
author_facet |
Yan W Peng Y Zhang C Chen X |
author_sort |
Yan W |
title |
The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in China |
title_short |
The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in China |
title_full |
The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in China |
title_fullStr |
The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in China |
title_full_unstemmed |
The manipulation of aboveground litter input affects soil CO2 efflux in a subtropical liquidambar forest in China |
title_sort |
manipulation of aboveground litter input affects soil co2 efflux in a subtropical liquidambar forest in china |
publisher |
Italian Society of Silviculture and Forest Ecology (SISEF) |
series |
iForest - Biogeosciences and Forestry |
issn |
1971-7458 1971-7458 |
publishDate |
2019-04-01 |
description |
Litters on the forest floor represent an important organic carbon (C) sources from aboveground plants to the soil, which therefore have a significant influence on belowground processes such as soil respiration. In this study, dynamic property of soil respiration was investigated under aboveground litter manipulation treatments in a liquidambar forest in subtropical China. The purpose of this study was to examine the impacts of changing aboveground litter inputs on soil CO2 emission in forests. The litter manipulation included litter addition (LA), litter removal (LR) and litter control (LC) treatments. Each litter treatment had six replications. Soil respiration rates were measured using an infrared gas analyzer system (LI-COR 8100) with soil chambers. The results showed that mean soil respiration rates increased significantly in LA plots (mean ± SE: 2.21 ± 0.44 μmol m-2 s-1; P<0.05) and decreased slightly in LR plots (1.17 ± 0.16 μmol m-2 s-1) when compared to control plots (1.42 ± 0.20 μmol m-2 s-1). On average, LA treatment significantly increased annual soil respiration by about 56% (837.5 ± 165 gC m-2 year-1), while LR treatment decreased soil respiration by approximately 17% (443.1 ± 61.7 gC m-2 year-1) compared with the control (535.5 ± 75.7 gC m-2 year-1). The “priming effect” was a primary contributor to the increase of soil respiration in LA treatments and the reduction of soil CO2 efflux was mainly ascribed to the elimination of organic C sources in LR treatments. Soil temperature was the main factor affecting seasonal variation in soil respiration. Up to the 90% to 95% seasonal variation in soil respiration is explained by soil temperature within each of the litter treatments. Our study indicated that changes in litter inputs due to climate change and human practices would significantly affected soil CO2 emission and would subsequently affect C balance in subtropical forests. |
topic |
Soil CO2 Emission Annual Litter Input Deciduous Forests Soil Temperature Soil Water Contents Subtropical China |
url |
https://iforest.sisef.org/contents/?id=ifor2812-012 |
work_keys_str_mv |
AT yanw themanipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina AT pengy themanipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina AT zhangc themanipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina AT chenx themanipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina AT yanw manipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina AT pengy manipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina AT zhangc manipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina AT chenx manipulationofabovegroundlitterinputaffectssoilco2effluxinasubtropicalliquidambarforestinchina |
_version_ |
1725219957892972544 |