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| Open AccessThe effectiveness of global protected areas for climate change mitigation
Protected areas are important for climate change mitigation. Here, the authors use satellite data and statistical matching to show that terrestrial protected areas have higher C stocks than non-protected areas, roughly equivalent to one year of annual global fossil fuel emissions.
- L. Duncanson
- , M. Liang
- & A. Zvoleff
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Article
| Open AccessSoil organic carbon is a key determinant of CH4 sink in global forest soils
Soil organic carbon has a positive effect on the removal of methane in forest soils. Global forests are found to be larger sinks of methane than previously estimated when the influence of SOC is considered.
- Jaehyun Lee
- , Youmi Oh
- & Hojeong Kang
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Article
| Open AccessMore than one quarter of Africa’s tree cover is found outside areas previously classified as forest
Recent analyses have suggested that tree cover in non-forest ecosystems may be much higher than expected. Here, the authors map tree cover down to the individual tree level for the entire continent of Africa and find that almost 30% is found outside areas classified as forests.
- Florian Reiner
- , Martin Brandt
- & Rasmus Fensholt
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| Open AccessHigh economic costs of reduced carbon sinks and declining biome stability in Central American forests
Tropical forest ecosystems supply ecosystem services of global importance. Here, the authors show that climate change reduces climate regulation and habitat services in Central American forests and results in high economic costs.
- Lukas Baumbach
- , Thomas Hickler
- & Marc Hanewinkel
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Article
| Open AccessMangrove reforestation provides greater blue carbon benefit than afforestation for mitigating global climate change
Blue carbon benefit has not been compared among mangrove reforestation and afforestation pathways at the global scale. This study shows that mangrove reforestation could perform a greater carbon storage potential per hectare than afforestation as its higher nitrogen availability and lower salinity.
- Shanshan Song
- , Yali Ding
- & Guanghui Lin
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Article
| Open AccessClimate teleconnections modulate global burned area
Here the authors find that climate teleconnections modulate ~53 % of the global burned area with both synchronous and lagged signals, and marked regional patterns, with the Tropical North Atlantic mode being the most relevant.
- Adrián Cardil
- , Marcos Rodrigues
- & Sergio de-Miguel
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Article
| Open AccessLand tenure drives Brazil’s deforestation rates across socio-environmental contexts
How land-tenure regimes affect deforestation remains ambiguous. This study shows how deforestation in Brazil is land-tenure dependent, and how strategies to effectively reduce deforestation can range from strengthening poorly defined rights to strengthening conservation-focused regimes.
- Andrea Pacheco
- & Carsten Meyer
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Article
| Open AccessLeakage does not fully offset soy supply-chain efforts to reduce deforestation in Brazil
This research quantifies the role of zero deforestation policies and potential leakages in Brazilian soybean production, the third major driver of deforestation globally. Here the authors provide the first estimates of net global avoided soy-driven deforestation from zero-deforestation import restrictions and find that such restrictions could help avoid ~40% of deforestation for soy cultivation in Brazil and ~2% of global deforestation.
- Nelson Villoria
- , Rachael Garrett
- & Kimberly Carlson
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Article
| Open AccessForest expansion dominates China’s land carbon sink since 1980
The impact of land-use and cover-change (LUCC) on ecosystem carbon stock in China is poorly known due to large biases in existing databases. Here the authors develop a new LUCC database with corrected false signals and reveal that forest expansion is the dominant driver of China’s recent carbon sink.
- Zhen Yu
- , Philippe Ciais
- & Guoyi Zhou
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Article
| Open AccessLand use change and carbon emissions of a transformation to timber cities
Wood used in construction stores carbon and reduces the emissions from steel and cement production. Transformation to timber cities while protecting forest and biodiversity is possible without significant increase in competition for land.
- Abhijeet Mishra
- , Florian Humpenöder
- & Alexander Popp
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Article
| Open AccessRates and drivers of aboveground carbon accumulation in global monoculture plantation forests
Tree planting is a promising yet controversial natural climate solution. Here the authors perform a global analysis of aboveground C accumulation in tree monocultures, identifying key predictors such as prior land use, taxonomic identity, and plant traits.
- Jacob J. Bukoski
- , Susan C. Cook-Patton
- & Matthew D. Potts
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Article
| Open AccessDeforestation-induced climate change reduces carbon storage in remaining tropical forests
Warming and drying from deforestation could amplify carbon storage losses in tropical remaining forests. Here the authors report this value to be extra 5.1% in the Amazon and 3.8% in Congo as compared to the direct biomass loss from deforestation.
- Yue Li
- , Paulo M. Brando
- & James T. Randerson
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Article
| Open AccessContrasting impacts of forests on cloud cover based on satellite observations
How forests influence cloud cover in different regions is not well understood. Here, the authors use satellite data to show that forests enhance clouds over most temperate and boreal forests but inhibited clouds over forests of Amazon, Central Africa, and Southeast US relative to nonforest areas.
- Ru Xu
- , Yan Li
- & Bojie Fu
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Article
| Open AccessElevated growth and biomass along temperate forest edges
Studies from tropical regions indicate that fragmented forests are less productive. Here, the authors report higher growth and biomass in temperate forest edges in North America, and show that temperate forests are more fragmented than tropical forests globally.
- Luca L. Morreale
- , Jonathan R. Thompson
- & Lucy R. Hutyra
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Article
| Open AccessThe role of urban trees in reducing land surface temperatures in European cities
Urban trees influence temperatures in cities. The authors here investigate in spatio-temporal variations in their cooling effect and find 8-12 K decreased temperatures for tree-rich urban areas in Central Europe during hot summers, and up to 4 K for Southern Europe, respectively.
- Jonas Schwaab
- , Ronny Meier
- & Edouard L. Davin
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Article
| Open AccessAltered growth conditions more than reforestation counteracted forest biomass carbon emissions 1990–2020
We combine data from global forest resource assessments with a forest model to quantify the role of major drivers of net carbon fluxes from global forest biomass at national resolution between 1990 and 2020. We find that growth-condition changes, more than reforestation, counteracted forest biomass carbon emissions mostly driven by deforestation.
- Julia Le Noë
- , Karl-Heinz Erb
- & Simone Gingrich
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| Open AccessRevealing the widespread potential of forests to increase low level cloud cover
Forests can influence climate by affecting low cloud formation, but where and when this occurs is not well known. Here, the authors provide a global-scale assessment, based on satellite remote sensing observations, suggesting afforestation mostly increases low cloud cover which could potentially cool surface temperatures.
- Gregory Duveiller
- , Federico Filipponi
- & Alessandro Cescatti
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Article
| Open AccessRecovery of logged forest fragments in a human-modified tropical landscape during the 2015-16 El Niño
It is unclear whether tropical forest fragments within plantation landscapes are resilient to drought. Here the authors analyse LiDAR and ground-based data from the 2015-16 El Niño event across a logging intensity gradient in Borneo. Although regenerating forests continued to grow, canopy height near oil palm plantations decreased, and a strong edge effect extended up to at least 300 m away.
- Matheus Henrique Nunes
- , Tommaso Jucker
- & David A. Coomes
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Article
| Open AccessGlobal patterns and climatic controls of forest structural complexity
Forest structure depends both on extrinsic factors such as climate and on intrinsic properties such as community composition and diversity. Here, the authors use a dataset of stand structural complexity based on LiDAR measurements to build a global map of structural complexity for primary forests, and find that precipitation variables best explain global patterns of forest structural complexity.
- Martin Ehbrecht
- , Dominik Seidel
- & Christian Ammer
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Article
| Open AccessOver half of western United States' most abundant tree species in decline
The nature of forest disturbances are changing, yet consequences for forest dynamics remain uncertain. Using a new index, Stanke et al. show the populations of over half of the most abundant tree species in the western US have declined in the last two decades, with grim implications for how temperate forests globally will respond to sustained anthropogenic and natural stress.
- Hunter Stanke
- , Andrew O. Finley
- & David W. MacFarlane
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| Open AccessExcess forest mortality is consistently linked to drought across Europe
Droughts pose an increasingly important threat to forests. Here the authors analyse a high-resolution Landsat-based dataset of forest canopy mortality in Europe over 1987–2016 to show that drought is already a major driver of tree mortality.
- Cornelius Senf
- , Allan Buras
- & Rupert Seidl
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| Open AccessThe economic costs of planting, preserving, and managing the world’s forests to mitigate climate change
Forests are critical for stabilizing our climate, but costs of mitigation remain uncertain. Here the authors show the global forest sector could reduce emissions by 6.0 GtCO2 yr−1 in 2055, or roughly 10% of the mitigation needed to limit warming to 1.5 °C by mid-century, at a cost of 393 billion USD yr−1, or $281/tCO2.
- K. G. Austin
- , J. S. Baker
- & A. Bean
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Article
| Open AccessEstimating retention benchmarks for salvage logging to protect biodiversity
Salvage logging has become a common practice to gain economic returns from naturally disturbed forests, but it could have considerable negative effects on biodiversity. Here the authors use a recently developed statistical method to estimate that ca. 75% of the naturally disturbed forest should be left unlogged to maintain 90% of the species unique to the area.
- Simon Thorn
- , Anne Chao
- & Alexandro B. Leverkus
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Article
| Open AccessForest management in southern China generates short term extensive carbon sequestration
Forest management may play an important role in climate change mitigation. Here, Tong et al. combine remote sensing and machine learning modelling to map forest cover dynamics in southern China during 2002–2017, showing effects on carbon sequestration that are extensive but of uncertain longevity and possible negative impact on soil water.
- Xiaowei Tong
- , Martin Brandt
- & Rasmus Fensholt
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Article
| Open AccessSeasonal dynamics of stem N2O exchange follow the physiological activity of boreal trees
Forest soil is known to be a source of the greenhouse gas N2O, but the impact of what is planted in that soil has long been overlooked. Here Machacova and colleagues quantify seasonal N2O fluxes from common boreal tree species in Finland, finding that all trees are net sources of this gas.
- Katerina Machacova
- , Elisa Vainio
- & Mari Pihlatie
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Article
| Open AccessEcosystem structural changes controlled by altered rainfall climatology in tropical savannas
Changing rainfall patterns may drive changes in the structure of tropical savanna. Here Zhang et al. use satellite data from global tropical savannas, and find evidence to suggest that altered rainfall may be favouring woody plants over herbaceous plants in these ecosystems.
- Wenmin Zhang
- , Martin Brandt
- & Rasmus Fensholt
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Article
| Open AccessMultiple forest attributes underpin the supply of multiple ecosystem services
Managing forests for the supply of multiple ecosystem services (ES) is key given potential trade-offs among services. Here, the authors analyse how forest stand attributes generate trade-offs among ES and the relative contribution of forest attributes and environmental factors to predict services.
- María R. Felipe-Lucia
- , Santiago Soliveres
- & Eric Allan
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Correspondence
| Open AccessReply to 'Flawed assumptions compromise water yield assessment'
- Ping Zhou
- , Qiang Li
- & Yongxian Su
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Article
| Open AccessPatterns and drivers of recent disturbances across the temperate forest biome
Climate change may impact forest disturbances, though local variability is high. Here, Sommerfeld et al. show that disturbance patterns across the temperate biome vary with agents and tree traits, yet large disturbances are consistently linked to warmer and drier than average conditions.
- Andreas Sommerfeld
- , Cornelius Senf
- & Rupert Seidl
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Article
| Open AccessCold adaptation recorded in tree rings highlights risks associated with climate change and assisted migration
Assisted migration has been proposed to aid trees in altering their ranges under climate change. Here, Montwé et al. use common garden experiments to show that lodgepole pine populations vary in their cold susceptibility, suggesting seed transfer may increase the risk of frost damage.
- David Montwé
- , Miriam Isaac-Renton
- & Heinrich Spiecker
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Comment
| Open AccessStrategically growing the urban forest will improve our world
- Theodore A. Endreny
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| Open AccessProtecting tropical forests from the rapid expansion of rubber using carbon payments
Expansion of rubber plantations threatens tropical forest carbon stocks and biodiversity, but may be dis-incentivised using carbon finance. Here, Warren-Thomas et al. use forest and agricultural data for Cambodia to show that carbon prices of $30–$51 per tCO2 are needed to match forest protection costs.
- Eleanor M. Warren-Thomas
- , David P. Edwards
- & Paul M. Dolman
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| Open AccessThe mark of vegetation change on Earth’s surface energy balance
Depending on where and when it occurs, vegetation cover change can affect local climate by altering the surface energy balance. Based on satellite data, this study provides the first data-driven assessment of such effects for multiple vegetation transitions at global scale.
- Gregory Duveiller
- , Josh Hooker
- & Alessandro Cescatti
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Article
| Open AccessImpact on short-lived climate forcers increases projected warming due to deforestation
The climate impacts of deforestation due to changes in biogenic volatile organic compound emissions, which act as short-lived climate forcers (SLCFs), are poorly understood. Here the authors show that including the impact SLCFs increases the projected warming associated with idealised deforestation scenarios.
- C. E. Scott
- , S. A. Monks
- & C. Wilson
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| Open AccessFactoring economic costs into conservation planning may not improve agreement over priorities for protection
Prioritising areas for conservation is hindered by disagreements over ecological targets. Here, Armsworth et al. combine a simulation approach and case study to test if considering economic return on investment aids in prioritisation, and find that its impact on reaching agreements varies greatly.
- Paul R. Armsworth
- , Heather B. Jackson
- & Nathan A. Sutton
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Article
| Open AccessHyperdominance in Amazonian forest carbon cycling
The Amazon rainforest is dominated by relatively few tree species, yet the degree to which this hyperdominance influences carbon cycling remains unknown. Here, the authors analyse 530 forest plots and show that ∼1% of species are responsible for 50% of the aboveground carbon storage and productivity.
- Sophie Fauset
- , Michelle O. Johnson
- & Oliver L. Phillips
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| Open AccessLogging cuts the functional importance of invertebrates in tropical rainforest
Invertebrates are key components in the ecological functioning of tropical forests. Here, Ewers et al. show that, compared to primary forest, logging halves the contribution of invertebrate species to several key ecosystem processes, including litter decomposition.
- Robert M. Ewers
- , Michael J. W. Boyle
- & Edgar C. Turner