Earthworms in an enhanced weathering mesocosm experiment: Effects on soil carbon sequestration, base cation exchange and soil CO2 efflux

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10487540" target="_blank" >RIV/00216208:11310/24:10487540 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1Gfwl697r9" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=1Gfwl697r9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.soilbio.2024.109596" target="_blank" >10.1016/j.soilbio.2024.109596</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Earthworms in an enhanced weathering mesocosm experiment: Effects on soil carbon sequestration, base cation exchange and soil CO2 efflux

Popis výsledku v původním jazyce

Despite its attractiveness for long-term carbon dioxide removal (CDR), quantifying weathering and CDR rates for enhanced weathering is a significant challenge. Moreover, the role of soil organisms, such as earthworms, in enhancing silicate weathering (both physically and chemically) has been suggested, but there is limited quantitative data on how biota, especially earthworms, contribute to inorganic carbon sequestration. To address these gaps, we conducted a mesocosm experiment with earthworms and basalt. Results indicate increases in clay and cation exchange, causing a weathering rate of over 10(-12) mol total alkalinity m(2) s(-1), in range with other basalt experiments. Basalt amendment increased dissolved inorganic carbon export by only 4 g CO2 m(-2). During the 4.5-month experiment, we observed neither a change in organic nor in inorganic carbon content. In soils without earthworms, basalt amendment reduced soil CO2 efflux by approximately 0.2 kg CO2 m(2), suggesting considerable CDR. This decrease was about two times larger than calculated inorganic CDR equivalents, suggesting changes in soil organic matter dynamics. Interestingly, earthworms reversed the basalt-induced reduction in soil CO2 efflux. This reversal was partly due to reduced export of dissolved inorganic carbon but mainly driven by increased organic matter decomposition. Our study highlights the importance of including organic carbon dynamics when evaluating the CDR potential of enhanced weathering.

Název v anglickém jazyce

Earthworms in an enhanced weathering mesocosm experiment: Effects on soil carbon sequestration, base cation exchange and soil CO2 efflux

Popis výsledku anglicky

Despite its attractiveness for long-term carbon dioxide removal (CDR), quantifying weathering and CDR rates for enhanced weathering is a significant challenge. Moreover, the role of soil organisms, such as earthworms, in enhancing silicate weathering (both physically and chemically) has been suggested, but there is limited quantitative data on how biota, especially earthworms, contribute to inorganic carbon sequestration. To address these gaps, we conducted a mesocosm experiment with earthworms and basalt. Results indicate increases in clay and cation exchange, causing a weathering rate of over 10(-12) mol total alkalinity m(2) s(-1), in range with other basalt experiments. Basalt amendment increased dissolved inorganic carbon export by only 4 g CO2 m(-2). During the 4.5-month experiment, we observed neither a change in organic nor in inorganic carbon content. In soils without earthworms, basalt amendment reduced soil CO2 efflux by approximately 0.2 kg CO2 m(2), suggesting considerable CDR. This decrease was about two times larger than calculated inorganic CDR equivalents, suggesting changes in soil organic matter dynamics. Interestingly, earthworms reversed the basalt-induced reduction in soil CO2 efflux. This reversal was partly due to reduced export of dissolved inorganic carbon but mainly driven by increased organic matter decomposition. Our study highlights the importance of including organic carbon dynamics when evaluating the CDR potential of enhanced weathering.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Soil Biology and Biochemistry

ISSN

0038-0717

e-ISSN

1879-3428

Svazek periodika

199

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

16

Strana od-do

109596

Kód UT WoS článku

001328023800001

EID výsledku v databázi Scopus

2-s2.0-85205149077