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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 540622
Title Nitrogen-induced new net primary production and carbon sequestration in global forests
Author(s) Du, Enzai; Vries, Wim de
Source Environmental Pollution 242 (2018). - ISSN 0269-7491 - p. 1476 - 1487.
Department(s) WIMEK
Environmental Systems Analysis Group
Alterra - Sustainable soil management
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Biological nitrogen fixation - Carbon sequestration - Carbon-nitrogen interactions - Net primary productivity - Nitrogen deposition

Nitrogen (N) deposition and biological N fixation (BNF) are main external N inputs into terrestrial ecosystems. However, few studies have simultaneously quantified the contribution of these two external N inputs to global NPP and consequent C sequestration. Based on literature analysis, we estimated new net primary production (NPP) due to external N inputs from BNF and N deposition and the consequent C sinks in global boreal, temperate and tropical forest biomes via a stoichiometric scaling approach. Nitrogen-induced new NPP is estimated to be 3.48 Pg C yr−1 in global established forests and contributes to a C sink of 1.83 Pg C yr−1. More specifically, the aboveground and belowground new NPP are estimated to be 2.36 and 1.12 Pg C yr−1, while the external N-induced C sinks in wood and soil are estimated to be 1.51 and 0.32 Pg C yr−1, respectively. BNF contributes to a major proportion of N-induced new NPP (3.07 Pg C yr−1) in global forest, and accounts for a C sink of 1.58 Pg C yr−1. Compared with BNF, N deposition only makes a minor contribution to new NPP (0.41 Pg C yr−1) and C sinks (0.25 Pg C yr−1) in global forests. At the biome scale, rates of N-induced new NPP and C sink show an increase from boreal forest towards tropical forest, as mainly driven by an increase of BNF. In contrast, N deposition leads to a larger C sink in temperate forest (0.11 Pg C yr−1) than boreal (0.06 Pg C yr−1) and tropical forest (0.08 Pg C yr−1). Our estimate of total C sink due to N-induced new NPP approximately matches an independent assessment of total C sink in global established forests, suggesting that external N inputs by BNF and atmospheric deposition are key drivers of C sinks in global forests. Based on a stoichiometric scaling approach, we estimated that nitrogen-induced new net primary production is a key driver of C sinks in global forests.

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