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The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees
Published on: December 27, 2017
The carbon sink of tropical seasonal forests in southeastern Brazil can be under threat
Vinícius Andrade Maia1, Alisson Borges Miranda Santos2, Natália de Aguiar-Campos2
1Departamento de Ciências Florestais, Universidade Federal de Lavras, P.O. Box 3037, Lavras, MG 37200-900, Brazil. vinicius.a.maia77@gmail.com rubensmanoel@ufla.br.
Abstract:
Tropical forests have played an important role as a carbon sink over time. However, the carbon dynamics of Brazilian non-Amazon tropical forests are still not well understood. Here, we used data from 32 tropical seasonal forest sites, monitored from 1987 to 2020 (mean site monitoring length, ~15 years) to investigate their long-term trends in carbon stocks and sinks. Our results highlight a long-term decline in the net carbon sink (0.13 Mg C ha-1 year-1) caused by decreasing carbon gains (2.6% by year) and increasing carbon losses (3.4% by year). The driest and warmest sites are experiencing the most severe carbon sink decline and have already moved from carbon sinks to carbon sources. Because of the importance of the terrestrial carbon sink for the global climate, policies are needed to mitigate the emission of greenhouse gases and to restore and protect tropical seasonal forests.
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