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Your search keyword '"Faria, Bruno L."' showing total 8 results
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8 results on '"Faria, Bruno L."'

1. The drivers and impacts of Amazon forest degradation

Author

Lapola, David M., primary, Pinho, Patricia, additional, Barlow, Jos, additional, Aragão, Luiz E. O. C., additional, Berenguer, Erika, additional, Carmenta, Rachel, additional, Liddy, Hannah M., additional, Seixas, Hugo, additional, Silva, Camila V. J., additional, Silva-Junior, Celso H. L., additional, Alencar, Ane A. C., additional, Anderson, Liana O., additional, Armenteras, Dolors, additional, Brovkin, Victor, additional, Calders, Kim, additional, Chambers, Jeffrey, additional, Chini, Louise, additional, Costa, Marcos H., additional, Faria, Bruno L., additional, Fearnside, Philip M., additional, Ferreira, Joice, additional, Gatti, Luciana, additional, Gutierrez-Velez, Victor Hugo, additional, Han, Zhangang, additional, Hibbard, Kathleen, additional, Koven, Charles, additional, Lawrence, Peter, additional, Pongratz, Julia, additional, Portela, Bruno T. T., additional, Rounsevell, Mark, additional, Ruane, Alex C., additional, Schaldach, Rüdiger, additional, da Silva, Sonaira S., additional, von Randow, Celso, additional, and Walker, Wayne S., additional

Published
2023
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2. Climate change and deforestation increase the vulnerability of Amazonian forests to post‐fire grass invasion

Author

Faria, Bruno L. De, Staal, Arie, Silva, Carlos A., Martin, Philip A., Panday, Prajjwal K., Dantas, Vinicius L., Silva, Thiago, Spatial Ecology and Global Change, and Environmental Sciences

Subjects
regime shifts, Global and Planetary Change, Ecology, Evolution, Amazon rainforest, Amazonian, Vulnerability, grass invasion, Climate change, climate change, Geography, savanna–forest boundaries, Behavior and Systematics, grass–fire cycle, Deforestation, tipping points, Amazon, Ecology, Evolution, Behavior and Systematics
Abstract

Aim We aimed to evaluate the vulnerability of the Amazon forest to post-fire grass invasion under present and future climate scenarios. Location Amazon Basin. Time period 1981–2017 and 2070–2099. Major taxa studied Plants. Methods We combined a fire–ecosystem model with remote sensing data and empirically-derived equations to evaluate the effects of a high-intensity fire (i.e., during an extreme drought) and logging in forest edges on tree canopy, and exotic grass cover under present and unmitigated climate change scenarios. We also contrasted simulated vegetation recovery time (as a function of climate variability) and current fire return intervals to identify areas in which fire–grass feedbacks could lock the system in a grass-dominated state. Results Under current climatic conditions, 14% of the Amazon was found to be vulnerable to post-fire grass invasion, with the south-eastern Amazon at the highest risk of invasion. We found that under unmitigated climate change, by the end of the century, 21% of the Amazon would be vulnerable to post-fire grass invasion. In 3% of the Amazon, fire return intervals are already shorter than the time required for grass exclusion by canopy recovery, implying a high risk of irreversible shifts to a fire-maintained degraded forest grassy state. The south-eastern region of the Amazon is currently at highest risk of irreversible degradation. Main conclusions Although resilience is evident in areas with low fire activity, increased fire frequency and intensity could push large Amazon forest areas towards a tipping point, causing transitions to states with low tree and high grass cover.

Published
2021

8. Model-Based Estimation of Amazonian Forests Recovery Time after Drought and Fire Events.

Author

De Faria, Bruno L., Marano, Gina, Piponiot, Camille, Silva, Carlos A., Dantas, Vinícius de L., Rattis, Ludmila, Rech, Andre R., and Collalti, Alessio

Subjects
FOREST fires, DROUGHT management, WILDFIRE prevention, DROUGHTS, FOREST regeneration, REMOTE sensing, DEFORESTATION
Abstract

In recent decades, droughts, deforestation and wildfires have become recurring phenomena that have heavily affected both human activities and natural ecosystems in Amazonia. The time needed for an ecosystem to recover from carbon losses is a crucial metric to evaluate disturbance impacts on forests. However, little is known about the impacts of these disturbances, alone and synergistically, on forest recovery time and the resulting spatiotemporal patterns at the regional scale. In this study, we combined the 3-PG forest growth model, remote sensing and field derived equations, to map the Amazonia-wide (3 km of spatial resolution) impact and recovery time of aboveground biomass (AGB) after drought, fire and a combination of logging and fire. Our results indicate that AGB decreases by 4%, 19% and 46% in forests affected by drought, fire and logging + fire, respectively, with an average AGB recovery time of 27 years for drought, 44 years for burned and 63 years for logged + burned areas and with maximum values reaching 184 years in areas of high fire intensity. Our findings provide two major insights in the spatial and temporal patterns of drought and wildfire in the Amazon: (1) the recovery time of the forests takes longer in the southeastern part of the basin, and, (2) as droughts and wildfires become more frequent—since the intervals between the disturbances are getting shorter than the rate of forest regeneration—the long lasting damage they cause potentially results in a permanent and increasing carbon losses from these fragile ecosystems. [ABSTRACT FROM AUTHOR]

Published
2021
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