Abstract
It remains unclear whether temperature and precipitation exert independent control on tropical vegetation and soil C pools. Likewise, it is unknown whether the feedbacks of tropical C pools to climate constraints vary with nutrient availability. These aspects are critical to improving our ability to predict the response of tropical C pools to climate dynamics. This review aimed to assess climate data and the spatial distribution of vegetation and soil C pools across the Brazilian territory to investigate i) whether [...]
Highlights
Mounting evidence suggests that rising atmospheric levels of CO2 increase the turnover rate of C in the plant-soil continuum even in the short-term (van Groenigen et al, 2017)
The horizontal distribution of vegetation and soil C pools is best described by Effective Moisture (EEM) rather than temperature or precipitation alone, whereas the vertical partition of C in plant-soil systems reflects biotic responses to climate-nutrient constraints
Since both mean annual temperature (MAT) and evapotranspiration rates increase towards the Equator (Huston and Wolverton, 2009), this aspect raises the question of the extent to which temperature and precipitation exert independent controls on tropical C pools
Summary
Mounting evidence suggests that rising atmospheric levels of CO2 increase the turnover rate of C in the plant-soil continuum even in the short-term (van Groenigen et al, 2017). Given that tropical C fluxes are already high, it is critical to assess the extent to which environmental changes may impact the size of vegetation and soil C pools, which combined represent approximately 846.0 Pg carbon (1 Pg C = 1.0 × 1015 g C) at global scales (Scharlemann et al, 2014). This is relevant because there are no clear spatial correlations between the MRT of tropical C pools and mean annual temperature (MAT) or precipitation (MAP) (Carvalhais et al, 2014). Since both MAT and evapotranspiration rates increase towards the Equator (Huston and Wolverton, 2009), this aspect raises the question of the extent to which temperature and precipitation exert independent controls on tropical C pools
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