Spatial heterogeneity of CO2 efflux and optimization of the number of measurement positions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652079%3A_____%2F16%3A00459669" target="_blank" >RIV/86652079:_____/16:00459669 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.ejsobi.2016.05.004" target="_blank" >http://dx.doi.org/10.1016/j.ejsobi.2016.05.004</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ejsobi.2016.05.004" target="_blank" >10.1016/j.ejsobi.2016.05.004</a>

Result language

angličtina

Original language name

Spatial heterogeneity of CO2 efflux and optimization of the number of measurement positions

Original language description

CO2 efflux from a soil surface is usually highly heterogeneous. This can make difficulties in its estimationnfor the whole investigated site. Therefore, the aims of this study were to determine the spatial heterogeneitynof CO2 efflux in four different ecosystems, and to determine the minimum sample size requirednto effectively estimate CO2 efflux from the studied area.nCO2 efflux was measured at 30 to 64 positions in a spruce forest, a beech forest, a grassland and anwetland during several campaigns. Mean CO2 efflux normalized for temperature of 10 C ranged betweenn1.37 and 3.57 mmolCO2 m 2 s 1, while the highest values were observed for the spruce forest and thenlowest for the wetland, where soil respiration processes were reduced by high soil water content. Thenspatial heterogeneity of CO2 efflux ranged between 15 and 57%, with lowest values for the grasslandnecosystem and the highest for the wetland. We found a decrease in CO2 efflux with increasing soilnmoisture at the forest sites and the wetland. At the forest sites this effect was not caused by oxygennlimitation or high soil water content, but can be attributed to other soil properties co-varying with soilnwater content. At the grassland site, the heterogeneity of CO2 efflux was mainly affected by grass height.nThe minimum number of measurement positions was determined by calculating the SD of a thousandnrandom selections for different numbers of sample positions (n 5e55). The minimum number ofnpositions was the n value which displayed a SD that was 5% of the mean R10 from the whole data set.nThe minimum number of positions ranged from between 9 and 35 and it increased with increasingnheterogeneity. This relationship was fit by a sigmoid regression.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

EH - Ecology - communities

OECD FORD branch

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Project

<a href="/en/project/LO1415" target="_blank" >LO1415: CzechGlobe 2020 – Development of the Centre of Global Climate Change Impacts Studies</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Name of the periodical

European Journal of Soil Biology

ISSN

1164-5563

e-ISSN

—

Volume of the periodical

75

Issue of the periodical within the volume

JUL

Country of publishing house

FR - FRANCE

Number of pages

12

Pages from-to

123-134

UT code for WoS article

000381650400016

EID of the result in the Scopus database

2-s2.0-84969856792