Modeling of soil CO2 efflux during water table fluctuation based on in situ measured data from a sedge-grass marsh

Kód výsledku v IS VaVaI

RIV/86652079:_____/16:00459668 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.15666/aeer/1403_423437

DOI - Digital Object Identifier

10.15666/aeer/1403_423437

Jazyk výsledku

angličtina

Název v původním jazyce

Modeling of soil CO2 efflux during water table fluctuation based on in situ measured data from a sedge-grass marsh

Popis výsledku v původním jazyce

Soils of wetland ecosystems serve as a huge storage of organic carbon. Its decomposition and consequent release of CO2 into the atmosphere is highly affected by soil hydrology, and this release of CO2 may severely increase during future climate change. The aim of this study was to describe the immediate response of soil CO2 efflux to temperature and changes in water level. Soil CO2 efflux from a marsh, temperature and the water table were continuously measured in situ during a gradual decrease of the water table and its consequent rapid increase after heavy rain. CO2 efflux fluctuated as it followed diurnal changes in temperature. However, it showed an increasing trend as the water table decreased. After the rain, the water table rose above the soil surface and soil CO2 efflux dropped fast to nearly zero. A simple model based on soil temperature and water table level was created to estimate soil CO2 efflux. There was far better agreement between this model and measured data than with the widely used model based only on temperature. The results showed the importance of including the soil water conditions in models for estimating soil CO2 efflux at sites with a high water table level.

Název v anglickém jazyce

Modeling of soil CO2 efflux during water table fluctuation based on in situ measured data from a sedge-grass marsh

Popis výsledku anglicky

Soils of wetland ecosystems serve as a huge storage of organic carbon. Its decomposition and consequent release of CO2 into the atmosphere is highly affected by soil hydrology, and this release of CO2 may severely increase during future climate change. The aim of this study was to describe the immediate response of soil CO2 efflux to temperature and changes in water level. Soil CO2 efflux from a marsh, temperature and the water table were continuously measured in situ during a gradual decrease of the water table and its consequent rapid increase after heavy rain. CO2 efflux fluctuated as it followed diurnal changes in temperature. However, it showed an increasing trend as the water table decreased. After the rain, the water table rose above the soil surface and soil CO2 efflux dropped fast to nearly zero. A simple model based on soil temperature and water table level was created to estimate soil CO2 efflux. There was far better agreement between this model and measured data than with the widely used model based only on temperature. The results showed the importance of including the soil water conditions in models for estimating soil CO2 efflux at sites with a high water table level.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EH - Ekologie – společenstva

OECD FORD obor

—

Projekt

LO1415: CzechGlobe 2020 - Rozvoj Centra pro studium dopadů globální změny klimatu

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Applied Ecology and Environmental Research

ISSN

1589-1623

e-ISSN

—

Svazek periodika

14

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

HU - Maďarsko

Počet stran výsledku

15

Strana od-do

423-437

Kód UT WoS článku

000383084700028

EID výsledku v databázi Scopus

2-s2.0-84977562318