Biocrust contribution to soil CO2 flux in desert shrubland ecosystem of northwest Mexico

A matéria orgânica do solo armazena a maior parte do carbono contido nos sistemas terrestres do planeta, sendo a maioria encontrada nos solos com floresta. O objetivo deste trabalho foi quantificar o fluxo de CO2 do solo e a sua variabilidade espacial em povoamento de Eucalyptus sp. Foram avaliados o fluxo de CO2 do solo, fatores ambientais (evaporação de água, temperatura e umidade do solo), atributos relacionados à fertilidade (pH, soma de bases e alumínio trocável), estrutura (densidade do solo e porosidade total) e matéria orgânica do solo (carbono orgânico total e carbono da biomassa microbiana). Análises de correlação linear simples indicaram que parte da variabilidade espacial do fluxo de CO2 do solo pode ser explicada pelo efeito conjunto do teor de carbono orgânico do solo, da biomassa da serapilheira e da presença de árvores no terreno, indicativas da participação de fatores bióticos no processo. No entanto, o fluxo de CO2 do solo é um fenômeno de natureza complexa, não sendo possível identificar um único atributo do solo ou do ambiente que, isoladamente, explique sua variação no espaço.Palavras-chave: Matéria orgânica; fatores ambientais; fertilidade; carbono; respiração do solo.AbstractSoil CO2 flux spatial variability on eucalyptus manmade forest. The organic matter on soil retains most of carbon contained in the planet terrestrial systems, specially in forest soils. The aim of this work was to quantify soil CO2 flux and its spatial variability on Eucalyptus sp. manmade forest. In order to that, soil CO2 flux, environmental factors (water evaporation, soil temperature and moisture), fertility attributes (pH, bases sum and exchangeable aluminum), structure (bulk density and total porosity), and soil organic matter (total organic carbon and microbial biomass carbon) were evaluated. Simple linear correlation analyses indicated that part of the spatial variability of soil CO2 flux can be explained by the associated effect of soil organic carbon amount, litter biomass and presence of trees, indicatives of participation of biotic factors in the process. However, the soil CO2 flux is a complex phenomenon, been impossible to identify a single soil or environmental attribute, which, individually, could explain its spatial variability. Keywords: Organic matter; environmental factors; fertility; carbon; linear correlation.

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Sealing capacity of clay-cap units above the Cerro Pabellón hidden geothermal system (northern Chile) derived by soil CO2 flux and temperature measurements

Journal of Volcanology and Geothermal Research ◽

10.1016/j.jvolgeores.2019.07.009 ◽

2019 ◽

Vol 384 ◽

pp. 1-14 ◽

Cited By ~ 3

Author(s):

Marco Taussi ◽

Barbara Nisi ◽

Marcela Pizarro ◽

Diego Morata ◽

Eugenio A. Veloso ◽

...

Keyword(s):

Co2 Flux ◽

Temperature Measurements ◽

Geothermal System ◽

Northern Chile ◽

Soil Co2 ◽

Soil Co2 Flux ◽

Sealing Capacity ◽

Clay Cap

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Soil CO2 flux: a method comparison of closed static chambers in a sugarcane field

Revista Brasileira de Ciência do Solo ◽

10.1590/s0100-06832012000200011 ◽

2012 ◽

Vol 36 (2) ◽

pp. 421-426 ◽

Cited By ~ 3

Author(s):

Walane Maria Pereira de Mello Ivo ◽

Ignacio Hernán Salcedo

Keyword(s):

Soil Respiration ◽

Method Comparison ◽

Soil Surface ◽

Co2 Flux ◽

Soda Lime ◽

Co2 Absorption ◽

Soil Co2 ◽

Soil Co2 Flux ◽

Absorption Area ◽

Trapping Solution

A large variety of techniques have been used to measure soil CO2 released from the soil surface, and much of the variability observed between locations must be attributed to the different methods used by the investigators. Therefore, a minimum protocol of measurement procedures should be established. The objectives of this study were (a) to compare different absorption areas, concentrations and volumes of the alkali trapping solution used in closed static chambers (CSC), and (b) to compare both, the optimized alkali trapping solution and the soda-lime trapping using CSC to measure soil respiration in sugarcane areas. Three CO2 absorption areas were evaluated (7; 15 and 20 % of the soil emission area or chamber); two volumes of NaOH (40 and 80 mL) at three concentrations (0.1, 0.25 and 0.5 mol L-1). Three different types of alkaline traps were tested: (a), 80 mL of 0.5 mol L-1 NaOH in glass containers, absorption area 15 % (V0.5); (b) 40 mL of 2 mol L-1 NaOH retained in a sponge, absorption area 80 % (S2) and (c) 40 g soda lime, absorption area 15 % (SL). NaOH concentrations of 0.5 mol L-1 or lower underestimated the soil CO2-C flux or CO2 flux. The lower limit of the alkali trap absorption area should be a minimum of 20 % of the area covered by the chamber. The 2 mol L-1 NaOH solution trap (S2) was the most efficient (highest accuracy and highest CO2 fluxes) in measuring soil respiration.

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Soil CO2 flux from three ecosystems in tropical peatland of Sarawak, Malaysia

Tellus B ◽

10.1111/j.1600-0889.2005.00129.x ◽

2005 ◽

Vol 57 (1) ◽

pp. 1-11 ◽

Cited By ~ 67

Author(s):

LULIE MELLING ◽

RYUSUKE HATANO ◽

KAH JOO GOH

Keyword(s):

Co2 Flux ◽

Soil Co2 ◽

Soil Co2 Flux ◽

Tropical Peatland

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Field Study on Correlation between CO2 Concentration and Surface Soil CO2 Flux in Closed Coal Mine Goaf

ACS Omega ◽

10.1021/acsomega.9b00927 ◽

2019 ◽

Vol 4 (7) ◽

pp. 12136-12145 ◽

Cited By ~ 1

Author(s):

Yongjun Wang ◽

Xiaoming Zhang ◽

Hemeng Zhang ◽

Kyuro Sasaki

Keyword(s):

Field Study ◽

Coal Mine ◽

Surface Soil ◽

Co2 Flux ◽

Co2 Concentration ◽

Soil Co2 ◽

Soil Co2 Flux

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Differential Responses and Controls of Soil CO2 and N2O Fluxes to Experimental Warming and Nitrogen Fertilization in a Subalpine Coniferous Spruce (Picea asperata Mast.) Plantation Forest

Forests ◽

10.3390/f10090808 ◽

2019 ◽

Vol 10 (9) ◽

pp. 808 ◽

Cited By ~ 1

Author(s):

Dandan Li ◽

Qing Liu ◽

Huajun Yin ◽

Yiqi Luo ◽

Dafeng Hui

Keyword(s):

Co2 Flux ◽

N Fertilization ◽

Response Patterns ◽

Soil Co2 ◽

Plantation Forest ◽

Soil Co2 Flux ◽

Soil Microbial ◽

Picea Asperata ◽

Negative Effect ◽

N2o Fluxes

Emissions of greenhouse gases (GHG) such as CO2 and N2O from soils are affected by many factors such as climate change, soil carbon content, and soil nutrient conditions. However, the response patterns and controls of soil CO2 and N2O fluxes to global warming and nitrogen (N) fertilization are still not clear in subalpine forests. To address this issue, we conducted an eight-year field experiment with warming and N fertilization treatments in a subalpine coniferous spruce (Picea asperata Mast.) plantation forest in China. Soil CO2 and N2O fluxes were measured using a static chamber method, and soils were sampled to analyze soil carbon and N contents, soil microbial substrate utilization (MSU) patterns, and microbial functional diversity. Results showed that the mean annual CO2 and N2O fluxes were 36.04 ± 3.77 mg C m−2 h−1 and 0.51 ± 0.11 µg N m−2 h−1, respectively. Soil CO2 flux was only affected by warming while soil N2O flux was significantly enhanced by N fertilization and its interaction with warming. Warming enhanced dissolve organic carbon (DOC) and MSU, reduced soil organic carbon (SOC) and microbial biomass carbon (MBC), and constrained the microbial metabolic activity and microbial functional diversity, resulting in a decrease in soil CO2 emission. The analysis of structural equation model indicated that MSU had dominant direct negative effect on soil CO2 flux but had direct positive effect on soil N2O flux. DOC and MBC had indirect positive effects on soil CO2 flux while soil NH4+-N had direct negative effect on soil CO2 and N2O fluxes. This study revealed different response patterns and controlling factors of soil CO2 and N2O fluxes in the subalpine plantation forest, and highlighted the importance of soil microbial contributions to GHG fluxes under climate warming and N deposition.

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