Greenhouse gas fluxes over managed grasslands in Central Europe

Greenhouse gas fluxes over managed grasslands in Central Europe

© 2018 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 24(2018), 5 vom: 01. Mai, Seite 1843-1872
1. Verfasser: Hörtnagl, Lukas (VerfasserIn)
Weitere Verfasser: Barthel, Matti, Buchmann, Nina, Eugster, Werner, Butterbach-Bahl, Klaus, Díaz-Pinés, Eugenio, Zeeman, Matthias, Klumpp, Katja, Kiese, Ralf, Bahn, Michael, Hammerle, Albin, Lu, Haiyan, Ladreiter-Knauss, Thomas, Burri, Susanne, Merbold, Lutz
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2018
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't carbon dioxide chamber eddy covariance emission factor fertilizer grazing livestock management mehr... methane nitrous oxide Greenhouse Gases Soil Carbon Dioxide 142M471B3J Nitrous Oxide K50XQU1029 Methane OP0UW79H66
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100 1 |a Hörtnagl, Lukas  |e verfasserin  |4 aut 
245 1 0 |a Greenhouse gas fluxes over managed grasslands in Central Europe 
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500 |a Citation Status MEDLINE 
520 |a © 2018 John Wiley & Sons Ltd. 
520 |a Central European grasslands are characterized by a wide range of different management practices in close geographical proximity. Site-specific management strategies strongly affect the biosphere-atmosphere exchange of the three greenhouse gases (GHG) carbon dioxide (CO2 ), nitrous oxide (N2 O), and methane (CH4 ). The evaluation of environmental impacts at site level is challenging, because most in situ measurements focus on the quantification of CO2 exchange, while long-term N2 O and CH4 flux measurements at ecosystem scale remain scarce. Here, we synthesized ecosystem CO2 , N2 O, and CH4 fluxes from 14 managed grassland sites, quantified by eddy covariance or chamber techniques. We found that grasslands were on average a CO2 sink (-1,783 to -91 g CO2  m-2  year-1 ), but a N2 O source (18-638 g CO2 -eq. m-2  year-1 ), and either a CH4 sink or source (-9 to 488 g CO2 -eq. m-2  year-1 ). The net GHG balance (NGB) of nine sites where measurements of all three GHGs were available was found between -2,761 and -58 g CO2 -eq. m-2  year-1 , with N2 O and CH4 emissions offsetting concurrent CO2 uptake by on average 21 ± 6% across sites. The only positive NGB was found for one site during a restoration year with ploughing. The predictive power of soil parameters for N2 O and CH4 fluxes was generally low and varied considerably within years. However, after site-specific data normalization, we identified environmental conditions that indicated enhanced GHG source/sink activity ("sweet spots") and gave a good prediction of normalized overall fluxes across sites. The application of animal slurry to grasslands increased N2 O and CH4 emissions. The N2 O-N emission factor across sites was 1.8 ± 0.5%, but varied considerably at site level among the years (0.1%-8.6%). Although grassland management led to increased N2 O and CH4 emissions, the CO2 sink strength was generally the most dominant component of the annual GHG budget 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a carbon dioxide 
650 4 |a chamber 
650 4 |a eddy covariance 
650 4 |a emission factor 
650 4 |a fertilizer 
650 4 |a grazing 
650 4 |a livestock 
650 4 |a management 
650 4 |a methane 
650 4 |a nitrous oxide 
650 7 |a Greenhouse Gases  |2 NLM 
650 7 |a Soil  |2 NLM 
650 7 |a Carbon Dioxide  |2 NLM 
650 7 |a 142M471B3J  |2 NLM 
650 7 |a Nitrous Oxide  |2 NLM 
650 7 |a K50XQU1029  |2 NLM 
650 7 |a Methane  |2 NLM 
650 7 |a OP0UW79H66  |2 NLM 
700 1 |a Barthel, Matti  |e verfasserin  |4 aut 
700 1 |a Buchmann, Nina  |e verfasserin  |4 aut 
700 1 |a Eugster, Werner  |e verfasserin  |4 aut 
700 1 |a Butterbach-Bahl, Klaus  |e verfasserin  |4 aut 
700 1 |a Díaz-Pinés, Eugenio  |e verfasserin  |4 aut 
700 1 |a Zeeman, Matthias  |e verfasserin  |4 aut 
700 1 |a Klumpp, Katja  |e verfasserin  |4 aut 
700 1 |a Kiese, Ralf  |e verfasserin  |4 aut 
700 1 |a Bahn, Michael  |e verfasserin  |4 aut 
700 1 |a Hammerle, Albin  |e verfasserin  |4 aut 
700 1 |a Lu, Haiyan  |e verfasserin  |4 aut 
700 1 |a Ladreiter-Knauss, Thomas  |e verfasserin  |4 aut 
700 1 |a Burri, Susanne  |e verfasserin  |4 aut 
700 1 |a Merbold, Lutz  |e verfasserin  |4 aut 
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773 1 8 |g volume:24  |g year:2018  |g number:5  |g day:01  |g month:05  |g pages:1843-1872 
856 4 0 |u http://dx.doi.org/10.1111/gcb.14079  |3 Volltext 
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