scholarly journals Aboveground carbon loss in natural and managed tropical forests from 2000 to 2012

2015 ◽  
Vol 10 (7) ◽  
pp. 074002 ◽  
Author(s):  
A Tyukavina ◽  
A Baccini ◽  
M C Hansen ◽  
P V Potapov ◽  
S V Stehman ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Carbon Loss ◽  
Aboveground Carbon

scholarly journals Corrigendum: Aboveground carbon loss in natural and managed tropical forests from 2000 to 2012 (2015 Environ. Res. Lett. 10 074002)

2018 ◽  
Vol 13 (10) ◽  
pp. 109501 ◽  
Author(s):  
A Tyukavina ◽  
A Baccini ◽  
M C Hansen ◽  
P V Potapov ◽  
S V Stehman ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Carbon Loss ◽  
Aboveground Carbon

scholarly journals National-scale estimation of gross forest aboveground carbon loss: a case study of the Democratic Republic of the Congo

2013 ◽  
Vol 8 (4) ◽  
pp. 044039 ◽  
Author(s):  
A Tyukavina ◽  
S V Stehman ◽  
P V Potapov ◽  
S A Turubanova ◽  
A Baccini ◽  
...  
Keyword(s):  
Democratic Republic ◽  
National Scale ◽  
Carbon Loss ◽  
Scale Estimation ◽  
Aboveground Carbon ◽  
Republic Of The Congo

scholarly journals Comment on “Tropical forests are a net carbon source based on aboveground measurements of gain and loss”

Science ◽  
2019 ◽  
Vol 363 (6423) ◽  
pp. eaar3629 ◽  
Author(s):  
Matthew C. Hansen ◽  
Peter Potapov ◽  
Alexandra Tyukavina
Keyword(s):  
Carbon Source ◽  
Tropical Forests ◽  
Spatial Patterns ◽  
Forest Carbon ◽  
Tree Cover ◽  
Optical Data ◽  
Carbon Loss ◽  
Moderate Resolution ◽  
Carbon Change ◽  
Omission Errors

Baccini et al. (Reports, 13 October 2017, p. 230) report MODIS-derived pantropical forest carbon change, with spatial patterns of carbon loss that do not correspond to higher-resolution Landsat-derived tree cover loss. The assumption that map results are unbiased and free of commission and omission errors is not supported. The application of passive moderate-resolution optical data to monitor forest carbon change overstates our current capabilities.

scholarly journals The impact of long dry periods on the aboveground biomass in tropical forests: 20 years of monitoring

2020 ◽  
Author(s):  
Milton Serpa de Meira-Junior ◽  
José Roberto Rodrigues Pinto ◽  
Natália Oliveira Ramos ◽  
Eder Pereira Miguel ◽  
Ricardo de Oliveira Gaspar ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Aboveground Biomass ◽  
Carbon Stocks ◽  
Stem Density ◽  
Biomass Carbon ◽  
Neotropical Forests ◽  
Aboveground Carbon ◽  
Large Trees ◽  
The Impact

Abstract Background Long-term studies of community and population dynamics indicate that abrupt disturbances often catalyse changes in vegetation and carbon stocks. These disturbances include the opening of clearings, flooding, rainfall seasonality, and drought, as well as fire and direct human disturbance. Such events may be super-imposed on longer-term trends in disturbance, such as those associated with climate change (heating, drying), as well as resources. Intact neotropical forests have recently experienced increased drought frequency and fire, on top of pervasive increases in atmospheric CO2 concentrations, but we lack long-term records of responses to such changes especially in the critical transitional areas at the interface of forest and savanna biomes. Here, we present results from 20 years monitoring a valley forest (moist tropical forest outlier) in central Brazil. The forest has experienced multiple drought events and includes plots which have and which have not experienced fire. We focus on how forest structure (stem density and aboveground biomass carbon) and dynamics (stem and biomass mortality and recruitment) have responded to these disturbance regimes. ResultsOverall, the biomass carbon stock increased due to the growth of the trees already present in the forest, without any increase in the overall number of tree stems. Over time, both recruitment and especially mortality of trees tended to increase, and periods of prolonged drought in particular resulted in increased mortality rates of larger trees. This increased mortality was in turn responsible for a decline in aboveground carbon toward the end of the monitoring period. Fire in 2010, which occurred in only some of our plots, tended to exacerbate the trends of increasing mortality and losses of biomass carbon. Conclusion Prolonged droughts influence the mortality of large trees, leading to a decline in aboveground carbon stocks. Here, and in other neotropical forests, recent droughts are capable of shutting down and reversing biomass carbon sinks. These new results add to evidence that anthropogenic climate changes are already adversely impacting tropical forests.

scholarly journals Land-Cover and Elevation-Based Mapping of Aboveground Carbon in a Tropical Mixed-Shrub Forest Area in West Java, Indonesia

Forests ◽  
2020 ◽  
Vol 11 (6) ◽  
pp. 636
Author(s):  
Elham Sumarga ◽  
Nuruddin Nurudin ◽  
Ichsan Suwandhi
Keyword(s):  
Land Cover ◽  
Tropical Forests ◽  
Remote Sensing Data ◽  
Lookup Table ◽  
Coefficient Of Determination ◽  
Kriging Interpolation ◽  
Mapping Technique ◽  
Aboveground Carbon ◽  
Geostatistical Interpolation ◽  
Carbon Mapping

Carbon sequestration and storage are among the most important ecosystem services provided by tropical forests. Improving the accuracy of the carbon mapping of tropical forests has always been a challenge, particularly in countries and regions with limited resources, with limited funding to provide high-resolution and high-quality remote sensing data. This study aimed to examine the use of land-cover and elevation-based methods of aboveground carbon mapping in a tropical forest composed of shrubs and trees. We tested a geostatistical method with an ordinary kriging interpolation using three stratification types: no stratification, stratification based on elevation, and stratification based on land-cover type, and compared it with a simple mapping technique, i.e., a lookup table based on a combination of land cover and elevation. A regression modelling with land cover and elevation as predictors was also tested in this study. The best performance was shown by geostatistical interpolation without stratification and geostatistical interpolation based on land cover, with a coefficient of variation (CV) of the root mean square error (RMSE) of 0.44, better than the performance of lookup table techniques (with a CV of the RMSE of more than 0.48). The regression modeling provided a significant model, but with a coefficient of determination (R2) of only 0.29, and a CV of the RMSE of 0.49. The use of other variables should thus be further investigated. We discuss improving aboveground carbon mapping in the study area and the implications of our results for forest management.

Sunlight Doubles Aboveground Carbon Loss in a Seasonally Dry Woodland in Patagonia

2020 ◽  
Author(s):  
Paula Berenstecher ◽  
Lucía Vivanco ◽  
Luis I. Pérez ◽  
Carlos L. Ballaré ◽  
Amy Theresa Austin
Keyword(s):  
Carbon Loss ◽  
Seasonally Dry ◽  
Aboveground Carbon ◽  
Dry Woodland

scholarly journals The impact of long dry periods on the aboveground biomass in tropical forests: 20 years of monitoring

2020 ◽  
Author(s):  
Milton Serpa de Meira-Junior ◽  
José Roberto Rodrigues Pinto ◽  
Natália Oliveira Ramos ◽  
Eder Pereira Miguel ◽  
Ricardo de Oliveira Gaspar ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Aboveground Biomass ◽  
Carbon Stocks ◽  
Stem Density ◽  
Biomass Carbon ◽  
Neotropical Forests ◽  
Aboveground Carbon ◽  
Large Trees ◽  
The Impact

Abstract Background Long-term studies of community and population dynamics indicate that abrupt disturbances often catalyse changes in vegetation and carbon stocks. These disturbances include the opening of clearings, flooding, rainfall seasonality, and drought, as well as fire and direct human disturbance. Such events may be super-imposed on longer-term trends in disturbance, such as those associated with climate change (heating, drying), as well as resources. Intact neotropical forests have recently experienced increased drought frequency and fire, on top of pervasive increases in atmospheric CO 2 concentrations, but we lack long-term records of responses to such changes especially in the critical transitional areas at the interface of forest and savanna biomes. Here, we present results from 20 years monitoring a valley forest (moist tropical forest outlier) in central Brazil. The forest has experienced multiple drought events and includes plots which have and which have not experienced fire. We focus on how forest structure (stem density and aboveground biomass carbon) and dynamics (stem and biomass mortality and recruitment) have responded to these disturbance regimes. Results Overall, the biomass carbon stock increased due to the growth of the trees already present in the forest, without any increase in the overall number of tree stems. Over time, both recruitment and especially mortality of trees tended to increase, and periods of prolonged drought in particular resulted in increased mortality rates of larger trees. This increased mortality was in turn responsible for a decline in aboveground carbon toward the end of the monitoring period. Fire in 2010, which occurred in only some of our plots, tended to exacerbate the trends of increasing mortality and losses of biomass carbon. Conclusion Prolonged droughts influence the mortality of large trees, leading to a decline in aboveground carbon stocks. Here, and in other neotropical forests, recent droughts are capable of shutting down and reversing biomass carbon sinks. These new results add to evidence that anthropogenic climate changes are already adversely impacting tropical forests.

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