Spartina alterniflora invasion controls organic carbon stocks in coastal marsh and mangrove soils across tropics and subtropics DOI
Shaopan Xia, Weiqi Wang, Zhaoliang Song

et al.

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(8), P. 1627 - 1644

Published: Jan. 15, 2021

Abstract Coastal wetlands are among the most productive ecosystems and store large amounts of organic carbon (C)—the so termed “blue carbon.” However, in tropics subtropics have been invaded by smooth cordgrass ( Spartina alterniflora ) affecting storage blue C. To understand how S. affects soil (SOC) stocks, sources, stability, their spatial distribution, we sampled soils along a 2500 km coastal transect encompassing tropical to subtropical climate zones. This included 216 samplings within three wetland types: marsh Phragmites australis two mangroves Kandelia candel Avicennia marina ). Using δ 13 C, C:nitrogen (N) ratios, lignin biomarker composition, traced changes SOC response invasion. The contribution ‐derived C up 40 cm accounts for 5.6%, 23%, 12% P. , K. A. communities, respectively, with corresponding change +3.5, −14, −3.9 t ha −1 . did not follow trend aboveground biomass from native invasive species, or vegetation types invasion duration (7–15 years). decreased increasing mean annual precipitation (1000–1900 mm) temperature (15.3–23.4℃). Edaphic variables marshes remained stable after invasion, hence, effects on content were absent. In mangrove wetlands, however, electrical conductivity, total N phosphorus, pH, active silicon main factors controlling stocks. Mangrove strongly impacted efforts needed focus restoring vegetation. By understanding mechanisms consequences sequestration can be predicted optimize developed.

Language: Английский

Modeling soil organic carbon evolution in long-term arable experiments with AMG model DOI Creative Commons
Hugues Clivot,

Jean-Christophe Mouny,

Annie Duparque

et al.

Environmental Modelling & Software, Journal Year: 2019, Volume and Issue: 118, P. 99 - 113

Published: April 13, 2019

Language: Английский

Citations

111
Soil organic carbon stabilization mechanisms in a subtropical mangrove and salt marsh ecosystems DOI
Huimin Sun, Jiang Jiang, Lina Cui

et al.

The Science of The Total Environment, Journal Year: 2019, Volume and Issue: 673, P. 502 - 510

Published: April 10, 2019

Language: Английский

Citations

107
Can cropland management practices lower net greenhouse emissions without compromising yield? DOI
Ziyin Shang, Mohamed Abdalla, Longlong Xia

et al.

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(19), P. 4657 - 4670

Published: July 9, 2021

Smart cropland management practices can mitigate greenhouse gas (GHG) emissions while safeguarding food security. However, the integrated effects on net budget (NGHGB) and grain yield from different remain poorly defined vary with environmental application conditions. Here, we conducted a global meta-analysis 347 observation sets of non-CO2 GHG (CH4 N2 O) yield, 412 observations soil organic carbon sequestration rate (SOCSR). Our results show that for paddy rice, replacing synthetic nitrogen at 30%-59% fertilizer significantly decreased (NGHGB: -15.3 ± 3.4 [standard error], SOCSR: -15.8 3.8, GHGs: 0.6 0.1 in Mg CO2 eq ha-1 year-1 ) improved rice (0.4 ). In contrast, intermittent irrigation increased by 11.2 3.1 0.4 0.1. The reduction SOC (15.5 3.3), which was most severe (>20) alkaline soils (pH > 7.5), completely offset mitigation CH4 emissions. Straw return also led to increase 4.8 1.4) silt-loam soils, where (6.3 1.3) were greatly stimulated. For upland cropping systems, mostly enhancing sequestration, straw -3.4 0.8, yield: -0.5 0.6) no-tillage -2.9 0.7, -0.1 0.3) more effective warm climates. This study highlights importance carefully managing croplands sequester without sacrifice limiting paddies.

Language: Английский

Citations

102
Drivers of tree carbon storage in subtropical forests DOI
Li Yin,

Weikai Bao,

Frans Bongers

et al.

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 654, P. 684 - 693

Published: Nov. 5, 2018

Language: Английский

Citations

97
Spartina alterniflora invasion controls organic carbon stocks in coastal marsh and mangrove soils across tropics and subtropics DOI
Shaopan Xia, Weiqi Wang, Zhaoliang Song

et al.

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(8), P. 1627 - 1644

Published: Jan. 15, 2021

Abstract Coastal wetlands are among the most productive ecosystems and store large amounts of organic carbon (C)—the so termed “blue carbon.” However, in tropics subtropics have been invaded by smooth cordgrass ( Spartina alterniflora ) affecting storage blue C. To understand how S. affects soil (SOC) stocks, sources, stability, their spatial distribution, we sampled soils along a 2500 km coastal transect encompassing tropical to subtropical climate zones. This included 216 samplings within three wetland types: marsh Phragmites australis two mangroves Kandelia candel Avicennia marina ). Using δ 13 C, C:nitrogen (N) ratios, lignin biomarker composition, traced changes SOC response invasion. The contribution ‐derived C up 40 cm accounts for 5.6%, 23%, 12% P. , K. A. communities, respectively, with corresponding change +3.5, −14, −3.9 t ha −1 . did not follow trend aboveground biomass from native invasive species, or vegetation types invasion duration (7–15 years). decreased increasing mean annual precipitation (1000–1900 mm) temperature (15.3–23.4℃). Edaphic variables marshes remained stable after invasion, hence, effects on content were absent. In mangrove wetlands, however, electrical conductivity, total N phosphorus, pH, active silicon main factors controlling stocks. Mangrove strongly impacted efforts needed focus restoring vegetation. By understanding mechanisms consequences sequestration can be predicted optimize developed.

Language: Английский

Citations

93