Influence of edaphic conditions on aboveground biomass in areas
post-mining in the Colombian pacific
Abstract
Mining is one of the main drivers of deforestation of tropical forests.
This activity affects the storage of aboveground biomass of these
ecosystems; and, therefore, its ability to contribute to the mitigation
of global climate change. The influence of soils on the aboveground
biomass of areas post-mining in the Colombian Pacific was evaluated. For
this, plots were established in areas post-mining and with different
successional ages (12-15 years, 30-35 years and mature forest). The
aboveground biomass and physicochemical parameters of the soil were
measured. A aboveground biomass of 15.58 t ha-1, 35.17 t ha-1, and
178.32 t ha-1 was recorded at 12-15 years, 30-35 years and mature
forest, respectively. The aboveground biomass was positively correlated
with organic matter (OM), calcium (Ca), magnesium (Mg), CICE, total
nitrogen (N) and silt; whereas, with sand, aluminum (Al) and potassium
(K) content the relationship was negative. It was evidenced that the
relationship between aboveground biomass and soils was different in each
successional age. When evaluating the changes of aboveground biomass and
soils in the successional, it was observed that the aboveground biomass
and total N increased with the recovery time; while the P and K
decreased with succession. On the other hand, the contents of OM, Mg,
Al, Ca and CICE, showed curvilinear tendencies, since they increased in
the first stages, and then in the advanced successional stages they
decreased. In summary, the results showed that the aboveground biomass
of areas post-mining was limited by multiple soil nutrients.