Sammanfattning

Metabolic theory and body size constraints on biomass production and decomposition suggest that differences in the intrinsic potential net ecosystem production (NEPPOT) should be small among contrasting C-3 grasslands and therefore unable to explain the wide range in the annual apparent net ecosystem production (NEPAPP) reported by previous studies. We estimated NEPPOT for nine C-3 grasslands under contrasting climate and management regimes using multiyear eddy covariance data. NEPPOT converged within a narrow range, suggesting little difference in the net carbon dioxide uptake capacity among C-3 grasslands. Our results indicate a unique feature of C-3 grasslands compared with other terrestrial ecosystems and suggest a state of stability in NEPPOT due to tightly coupled production and respiration processes. Consequently, the annual NEPAPP of C-3 grasslands is primarily a function of seasonal and short-term environmental and management constraints, and therefore especially susceptible to changes in future climate patterns and associated adaptation of management practices.

Nyckelord

Climate; ecosystem traits; eddy covariance; grassland ecosystem functioning; inter-comparison; management practices; metabolic theory

Publicerad i

Ecology Letters
2013, Volym: 16, nummer: 4, sidor: 502-512
Utgivare: WILEY-BLACKWELL

SLU författare

• Peichl, Matthias

  • Institutionen för skogens ekologi och skötsel, Sveriges lantbruksuniversitet
    
  • Coláiste na hOllscoile Corcaigh

Globala målen

Vidta omedelbara åtgärder för att bekämpa klimatförändringarna och dess konsekvenser


UKÄ forskningsämne

Skogsvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1111/ele.12075

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/50452