Estimations of Global Terrestrial Productivity

Saugier, B.; Roy, Jacques; Mooney, Harold A.

doi:10.1016/b978-012505290-0/50024-7

Cited by 317 publications

(220 citation statements)

References 25 publications

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“…Minimum carbon stocks for forests were set to 3 kgC m −2 , a value below typical values for scrublands 4 , to avoid SCact of forests falling below SCact of savannahs and other wooded land (OWL). For this land-cover type literature data is inconsistent (Supplementary Table 6).…”

Section: Carbon Stock Of the Actual Vegetation (Scact )mentioning

confidence: 99%

“…We followed the same procedure as with the NPPpot assessment, using three global biome maps 31,42,43 . We used various databases for potential carbon stocks in vegetation 4,16,[60][61][62][63] Table 5 shows potential vegetation units and the potential carbon stock values assigned, and Supplementary Tables 8-12 show results from forest site-data studies that explicitly discern natural from managed forests 32,33 . A comparison of these data reveals that the data we use are well in line with the site-specific studies 36,37 .…”

Section: Npp Of the Actual Vegetation (Nppact )mentioning

confidence: 99%

“…For the first two maps we followed the vegetation approach used for the best guess estimated (three biome maps combined with typical SCpot values for the individual vegetation types), using SC values from alternative literature sources 4,60,62 (Supplementary Table 5) and calculating a minimum and maximum map. We did this by using the minimum and maximum value per grid cell of the three biome maps and our best-guess map.…”

Section: Consistency Adjustmentsmentioning

confidence: 99%

“…τ b is a SC pot = NPPpot / SC act NPP act (1) decisive parameter for the elemental composition (stoichiometry) of ecosystems, critically influencing the accumulation and availability of chemical elements in ecosystems, rendering τ b a key factor for plant growth dynamics 17 and a crucial determinant of fluxes between terrestrial vegetation and the atmosphere [3][4][5][6][7] . Because τ b is an ecosystem property that emerges from the interplay between climate, soil, vegetation type, the chemical composition of the atmosphere, precipitation, and land use, it is highly variable across space and time 8,9 .…”

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confidence: 99%

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Biomass turnover time in terrestrial ecosystems halved by land use

Erb¹,

Fetzel²,

et al. 2016

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The terrestrial carbon cycle is not well quantified1. Biomass turnover time is a crucial parameter in the global carbon cycle2–4, and contributes to the feedback between the terrestrial carbon cycle and climate2–7. Biomass turnover time varies substantially in time and space, but its determinants are not well known8,9, making predictions of future global carbon cycle dynamics uncertain5,10–13. Land use—the sum of activities that aim at enhancing terrestrial ecosystem services14—alters plant growth15 and reduces biomass stocks16, and is hence expected to aect biomass turnover. Here we explore land-use-induced alterations of biomass turnover at the global scale by comparing the biomass turnover of the actual vegetation with that of a hypothetical vegetation state with no land use under current climate conditions. We find that, in the global average, biomass turnover is 1.9 times faster with land use. This acceleration aects all biomes roughly equally, but with large dierences between land-use types. Land conversion, for example fromforests to agricultural fields, is responsible for59%of the acceleration; the use of forestsand natural grazing land accounts for 26% and 15% respectively. Reductions in biomass stocks are partly compensated by reductions in net primary productivity. We conclude that land use significantly and systematically aects the fundamental trade-off between carbon turnover and carbon stocks

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Section: Carbon Stock Of the Actual Vegetation (Scact )mentioning

confidence: 99%

Section: Npp Of the Actual Vegetation (Nppact )mentioning

confidence: 99%

Section: Consistency Adjustmentsmentioning

confidence: 99%

mentioning

confidence: 99%

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Biomass turnover time in terrestrial ecosystems halved by land use

Erb¹,

Fetzel²,

et al. 2016

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“…Because of the large area of old-growth forests in the tropics, and their high carbon density, potential alteration of their biomass stocks is of particular importance to the global carbon cycle (Saugier, Roy & Mooney 2001;Schimel 1995). Many studies have evaluated changes in biomass stocks in tropical forests using recensuses of field plots Chave et al 2008; Lewis et al 2009b;Phillips et al 1998Phillips et al , 2008, and some have also examined changes in coarse woody productivity Phillips, 1996).…”

Section: Introductionmentioning

confidence: 99%