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Climate Change Can Accelerate Depletion of Montane Grassland C Stocks

Wang, N.; Xia, L.; Goodale, C. L.; Butterbach-Bahl, K.; Kiese, R.

Abstract:
Climate warming and management will likely affect carbon (C) fluxes of montane grassland ecosystems. In this study, we assessed the effect of simultaneous warming (+2°C) and decreased precipitation (−25%) on carbon exchange of montane grasslands in S-Germany by translocating large intact plant-soil cores from a high altitude to a low altitude site. Cores received two common grassland management regimes: intensive (4–5 cuts and slurry application) and extensive (1–2 cuts and slurry application). Diurnal patterns of net ecosystem exchange (NEE) and total ecosystem respiration (Reco) were measured over 1.5 years in 2–3 weeks intervals during the snow free period. Additional data on environmental controls, that is, photosynthetic active radiation, grass height and soil moisture and temperature, were used to develop empirical models to estimate daily and annual fluxes of gross primary production (GPP) and Reco. Considering the 2 years period (2014 and 2015), we found that, under warmer and slightly drier conditions, both GPP and Reco significantly (p < 0.01) increased (up to 20%) but with a higher temperature sensitivity of Reco, particularly in intensive managed grassland. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000139747
Frei zugänglich ab 01.07.2022
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0886-6236, 1944-9224
KITopen-ID: 1000139747
Erschienen in Global Biogeochemical Cycles
Verlag John Wiley and Sons
Band 35
Heft 10
Seiten e2020GB006792
Nachgewiesen in Scopus
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