Abstract:
:Global change is affecting terrestrial carbon (C) balances. The effect of climate on ecosystem C balance has been largely explored, but the roles of other concurrently changing factors, such as diversity and nutrient availability, remain elusive. We used eddy-covariance C-flux measurements from 62 ecosystems from which we compiled information on climate, ecosystem type, stand age, species abundance and foliar concentrations of N and P of the main species, to assess their importance in the ecosystem C balance. Climate and productivity were the main determinants of ecosystem C balance and its stability. In P-rich sites, increasing N was related to increased gross primary production and respiration and vice versa, but reduced net C uptake. Our analyses did not provide evidence for a strong relation between ecosystem diversity and their productivity and stability. Nonetheless, these results suggest that nutrient imbalances and, potentially, diversity loss may alter future global C balance.
journal_name
Glob Chang Bioljournal_title
Global change biologyauthors
Fernández-Martínez M,Sardans J,Musavi T,Migliavacca M,Iturrate-Garcia M,Scholes RJ,Peñuelas J,Janssens IAdoi
10.1111/gcb.15385subject
Has Abstractpub_date
2020-12-01 00:00:00pages
7067-7078issue
12eissn
1354-1013issn
1365-2486journal_volume
26pub_type
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