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Vilà-Cabrera A, Astigarraga J, Jump AS, Zavala MA, Seijo F, Sperlich D, Ruiz-Benito P. Anthropogenic land-use legacies underpin climate change-related risks to forest ecosystems. TRENDS IN PLANT SCIENCE 2023; 28:1132-1143. [PMID: 37263916 DOI: 10.1016/j.tplants.2023.04.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 04/13/2023] [Accepted: 04/26/2023] [Indexed: 06/03/2023]
Abstract
Forest ecosystems with long-lasting human imprints can emerge worldwide as outcomes of land-use cessation. However, the interaction of these anthropogenic legacies with climate change impacts on forests is not well understood. Here, we set out how anthropogenic land-use legacies that persist in forest properties, following alterations in forest distribution, structure, and composition, can interact with climate change stressors. We propose a risk-based framework to identify anthropogenic legacies of land uses in forest ecosystems and quantify the impact of their interaction with climate-related stress on forest responses. Considering anthropogenic land-use legacies alongside environmental drivers of forest ecosystem dynamics will improve our predictive capacity of climate-related risks to forests and our ability to promote ecosystem resilience to climate change.
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Affiliation(s)
- Albert Vilà-Cabrera
- CREAF, E08193 Bellaterra (Cerdanyola del Vallès), Catalonia, Spain; Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, UK; Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain.
| | - Julen Astigarraga
- Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain
| | - Alistair S Jump
- Biological and Environmental Sciences, Faculty of Natural Sciences, University of Stirling, Stirling, UK
| | - Miguel A Zavala
- Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain
| | - Francisco Seijo
- Instituto de Empresa, School of Global and Public Affairs, Madrid, Spain
| | - Dominik Sperlich
- Department of Forestry Economics and Forest Planning, Faculty of Environment and Natural Resources, University of Freiburg, Freiburg, Germany
| | - Paloma Ruiz-Benito
- Universidad de Alcalá, Grupo de Ecología y Restauración Forestal, Departamento de Ciencias de la Vida, 28805 Alcalá de Henares, Madrid, Spain; Universidad de Alcalá, Grupo de Investigación en Teledetección Ambiental, Departamento de Geología, Geografía y Medio Ambiente, 28801 Alcalá de Henares, Madrid, Spain
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2
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Bernard T, Lambert S, Macours K, Vinez M. Impact of small farmers' access to improved seeds and deforestation in DR Congo. Nat Commun 2023; 14:1603. [PMID: 36959195 PMCID: PMC10036623 DOI: 10.1038/s41467-023-37278-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Accepted: 03/10/2023] [Indexed: 03/25/2023] Open
Abstract
Since the 1960s, the increased availability of modern seed varieties in developing countries has had large positive effects on households' well-being. However, the effect of related land use changes on deforestation and biodiversity is ambiguous. This study examines this question through a randomized control trial in a remote area in the Congo Basin rainforest with weak input and output markets. Using plot-level data on land conversion combined with remote sensing data, we find that promotion of modern seed varieties did not lead to an increase in overall deforestation by small farmers. However, farmers cleared more primary forest and less secondary forest. We attribute this to the increased demand for nitrogen required by the use of some modern seed varieties, and to the lack of alternative sources of soil nutrients, which induced farmers to shift towards cultivation of land cleared in primary forest. Unless combined with interventions to maintain soil fertility, policies to promote modern seed varieties may come at the cost of important losses in biodiversity.
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Affiliation(s)
- Tanguy Bernard
- Bordeaux School of Economics, Univ. Bordeaux, Pessac, 33600, France
| | | | - Karen Macours
- Paris School of Economics, INRAE, Paris, 75014, France.
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3
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Marshall AR, Waite CE, Pfeifer M, Banin LF, Rakotonarivo S, Chomba S, Herbohn J, Gilmour DA, Brown M, Chazdon RL. Fifteen essential science advances needed for effective restoration of the world's forest landscapes. Philos Trans R Soc Lond B Biol Sci 2023; 378:20210065. [PMID: 36373922 PMCID: PMC9661955 DOI: 10.1098/rstb.2021.0065] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
There has never been a more pressing and opportune time for science and practice to collaborate towards restoration of the world's forests. Multiple uncertainties remain for achieving successful, long-term forest landscape restoration (FLR). In this article, we use expert knowledge and literature review to identify knowledge gaps that need closing to advance restoration practice, as an introduction to a landmark theme issue on FLR and the UN Decade on Ecosystem Restoration. Aligned with an Adaptive Management Cycle for FLR, we identify 15 essential science advances required to facilitate FLR success for nature and people. They highlight that the greatest science challenges lie in the conceptualization, planning and assessment stages of restoration, which require an evidence base for why, where and how to restore, at realistic scales. FLR and underlying sciences are complex, requiring spatially explicit approaches across disciplines and sectors, considering multiple objectives, drivers and trade-offs critical for decision-making and financing. The developing tropics are a priority region, where scientists must work with stakeholders across the Adaptive Management Cycle. Clearly communicated scientific evidence for action at the outset of restoration planning will enable donors, decision makers and implementers to develop informed objectives, realistic targets and processes for accountability. This article paves the way for 19 further articles in this theme issue, with author contributions from across the world. This article is part of the theme issue 'Understanding forest landscape restoration: reinforcing scientific foundations for the UN Decade on Ecosystem Restoration'.
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Affiliation(s)
- Andrew R. Marshall
- Forest Research Institute, University of the Sunshine Coast, QLD 4556, Australia
- Department of Environment and Geography, University of York, York YO10 5DD, UK
- Reforest Africa, Mang'ula, Tanzania
- Flamingo Land Ltd, Kirby Misperton, North Yorkshire YO17 6UX, UK
| | - Catherine E. Waite
- Forest Research Institute, University of the Sunshine Coast, QLD 4556, Australia
| | - Marion Pfeifer
- School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
| | - Lindsay F. Banin
- UK Centre for Ecology & Hydrology, Library Avenue, Bailrigg, Lancaster LA1 4AP, UK
| | - Sarobidy Rakotonarivo
- École Supérieure des Sciences Agronomiques, Université d'Antananarivo, BP 566 Antananarivo, Madagascar
| | | | - John Herbohn
- Forest Research Institute, University of the Sunshine Coast, QLD 4556, Australia
| | - Donald A. Gilmour
- Forest Research Institute, University of the Sunshine Coast, QLD 4556, Australia
| | - Mark Brown
- Forest Research Institute, University of the Sunshine Coast, QLD 4556, Australia
| | - Robin L. Chazdon
- Forest Research Institute, University of the Sunshine Coast, QLD 4556, Australia
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4
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Katona S, Paulikas D, Stone GS. Ethical opportunities in deep-sea collection of polymetallic nodules from the Clarion-Clipperton Zone. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2022; 18:634-654. [PMID: 34766726 PMCID: PMC9300171 DOI: 10.1002/ieam.4554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 10/22/2021] [Accepted: 11/04/2021] [Indexed: 05/14/2023]
Abstract
Infrastructure supporting the transition of human societies from fossil fuels to renewable energy will require hundreds of millions of tons of metals. Polymetallic nodules on the abyssal seabed of the Clarion-Clipperton Zone (CCZ), eastern North Pacific Ocean, could provide them. We focus on ethical considerations and opportunities available to the novel CCZ nodule-collection industry, integrating robust science with strong pillars of social and environmental responsibility. Ethical considerations include harm to sea life and recovery time, but also the value of human life, indigenous rights, rights of nature, animal rights, intrinsic values, and intangible ecosystem services. A "planetary perspective" considers the biosphere, hydrosphere, and atmosphere, extends beyond mineral extraction to a life-cycle view of impacts, and includes local, national, and global impacts and stakeholders. Stakeholders include direct nodule-collection actors, ocean conservationists, companies, communities, interest groups, nations, and citizens globally, plus counterfactual stakeholders involved with or affected by intensification of terrestrial mining if ocean metals are not used. Nodule collection would harm species and portions of ecosystems, but could have lower life-cycle impacts than terrestrial mining expansion, especially if nodule-metal producers explicitly design for it and stakeholders hold them accountable. Participants across the value chain can elevate the role of ethics in strategic objective setting, engineering design optimization, commitments to stakeholders, democratization of governance, and fostering of circular economies. The International Seabed Authority is called to establish equitable and transparent distribution of royalties and gains, and continue engaging scientists, economists, and experts from all spheres in optimizing deep-sea mineral extraction for humans and nature. Nodule collection presents a unique opportunity for an ambitious reset of ecological norms in a nascent industry. Embracing ethical opportunities can set an example for industrial-scale activities on land and sea, accelerate environmental gains through environmental competition with land ores, and hasten civilization's progress toward a sustainable future. Integr Environ Assess Manag 2022;18:634-654. © 2021 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).
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Affiliation(s)
| | - Daina Paulikas
- Minerals, Materials and Society Program, Department of Geography and Spatial Sciences, Pearson HallUniversity of DelawareNewarkDelawareUSA
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5
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Effect of Anthropogenic Activities on the Population of Moor Macaques (Macaca maura) in South Sulawesi, Indonesia. INT J PRIMATOL 2022. [DOI: 10.1007/s10764-022-00279-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractForest loss due to anthropogenic activities is one of the main causes of plant and animal species decline. Studying the species’ population status (i.e., density, abundance, and geographic distribution) on a regular basis is one of the main tools to assess the effect of anthropogenic activities on wildlife, to monitor population dynamics and to intervene with effective conservation strategies when the population of an endangered species declines. On Sulawesi Island, Indonesia, anthropogenic activities, such as agriculture, are decreasing the remaining natural habitats available for several endemic and endangered species. The effect of this forest loss on the threatened moor macaques (Macaca maura) in South Sulawesi is unknown, and data on the population status of this species are needed to design effective conservation strategies. To assess the population status of the moor macaques, we walked linear transects (N = 29, survey effort = 114 km) at six sites between November 2019 and March 2020 to estimate macaque population density and encounter rate. We tested the effect of anthropogenic activities on macaque encounter rate. Our global density estimate (24 individuals/km2) was lower than the overall estimate from the most detailed survey conducted on this species, which covered its whole geographic distribution (36.1 individuals/km2). However, these results should be interpreted with caution because the previous density estimate falls within the confidence intervals of our estimate. Furthermore, we found regional declines in moor macaque encounter rates in at least two sites compared with previous studies. We found a high presence of anthropogenic activity in the forests inhabited by macaques. Moor macaques were less abundant in open areas with no forest (i.e., clear cuttings) than in forested areas, and in the presence of nonspecies-specific hunting traps (i.e., wire-loop traps). Moreover, moor macaques were more abundant in areas with a higher presence of humans and domestic animals. Overall, our data suggest that the population of this species may be declining in certain regions but further surveys are needed to corroborate whether this is occurring across the entire geographic distribution.
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6
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Edwards DP, Cerullo GR, Chomba S, Worthington TA, Balmford AP, Chazdon RL, Harrison RD. Upscaling tropical restoration to deliver environmental benefits and socially equitable outcomes. Curr Biol 2021; 31:R1326-R1341. [PMID: 34637743 DOI: 10.1016/j.cub.2021.08.058] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The UN Decade on Ecosystem Restoration offers immense potential to return hundreds of millions of hectares of degraded tropical landscapes to functioning ecosystems. Well-designed restoration can tackle multiple Sustainable Development Goals, driving synergistic benefits for biodiversity, ecosystem services, agricultural and timber production, and local livelihoods at large spatial scales. To deliver on this potential, restoration efforts must recognise and reduce trade-offs among objectives, and minimize competition with food production and conservation of native ecosystems. Restoration initiatives also need to confront core environmental challenges of climate change and inappropriate planting in savanna biomes, be robustly funded over the long term, and address issues of poor governance, inadequate land tenure, and socio-cultural disparities in benefits and costs. Tackling these issues using the landscape approach is vital to realising the potential for restoration to break the cycle of land degradation and poverty, and deliver on its core environmental and social promises.
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Affiliation(s)
- David P Edwards
- Ecology and Evolutionary Biology, School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK.
| | | | | | | | - Andrew P Balmford
- Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK
| | - Robin L Chazdon
- Tropical Forests and People Research Centre, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
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7
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Aragón S, Salinas N, Nina-Quispe A, Qquellon VH, Paucar GR, Huaman W, Porroa PC, Olarte JC, Cruz R, Muñiz JG, Yupayccana CS, Espinoza TEB, Tito R, Cosio EG, Roman-Cuesta RM. Aboveground biomass in secondary montane forests in Peru: Slow carbon recovery in agroforestry legacies. Glob Ecol Conserv 2021. [DOI: 10.1016/j.gecco.2021.e01696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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8
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Heinrich VHA, Dalagnol R, Cassol HLG, Rosan TM, de Almeida CT, Silva Junior CHL, Campanharo WA, House JI, Sitch S, Hales TC, Adami M, Anderson LO, Aragão LEOC. Large carbon sink potential of secondary forests in the Brazilian Amazon to mitigate climate change. Nat Commun 2021; 12:1785. [PMID: 33741981 PMCID: PMC7979697 DOI: 10.1038/s41467-021-22050-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 02/19/2021] [Indexed: 01/31/2023] Open
Abstract
Tropical secondary forests sequester carbon up to 20 times faster than old-growth forests. This rate does not capture spatial regrowth patterns due to environmental and disturbance drivers. Here we quantify the influence of such drivers on the rate and spatial patterns of regrowth in the Brazilian Amazon using satellite data. Carbon sequestration rates of young secondary forests (<20 years) in the west are ~60% higher (3.0 ± 1.0 Mg C ha-1 yr-1) compared to those in the east (1.3 ± 0.3 Mg C ha-1 yr-1). Disturbances reduce regrowth rates by 8-55%. The 2017 secondary forest carbon stock, of 294 Tg C, could be 8% higher by avoiding fires and repeated deforestation. Maintaining the 2017 secondary forest area has the potential to accumulate ~19.0 Tg C yr-1 until 2030, contributing ~5.5% to Brazil's 2030 net emissions reduction target. Implementing legal mechanisms to protect and expand secondary forests whilst supporting old-growth conservation is, therefore, key to realising their potential as a nature-based climate solution.
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Affiliation(s)
- Viola H. A. Heinrich
- grid.5337.20000 0004 1936 7603School of Geographical Sciences, University of Bristol, Bristol, UK
| | - Ricardo Dalagnol
- grid.419222.e0000 0001 2116 4512Earth Observation and Geoinformatics Division, National Institute for Space Research (INPE), São José dos Campos, Brazil
| | - Henrique L. G. Cassol
- grid.419222.e0000 0001 2116 4512Earth Observation and Geoinformatics Division, National Institute for Space Research (INPE), São José dos Campos, Brazil
| | - Thais M. Rosan
- grid.8391.30000 0004 1936 8024College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Catherine Torres de Almeida
- grid.419222.e0000 0001 2116 4512Earth Observation and Geoinformatics Division, National Institute for Space Research (INPE), São José dos Campos, Brazil
| | - Celso H. L. Silva Junior
- grid.419222.e0000 0001 2116 4512Earth Observation and Geoinformatics Division, National Institute for Space Research (INPE), São José dos Campos, Brazil
| | - Wesley A. Campanharo
- grid.419222.e0000 0001 2116 4512Earth Observation and Geoinformatics Division, National Institute for Space Research (INPE), São José dos Campos, Brazil
| | - Joanna I. House
- grid.5337.20000 0004 1936 7603School of Geographical Sciences, University of Bristol, Bristol, UK ,grid.5337.20000 0004 1936 7603Cabot institute, University of Bristol, Bristol, UK
| | - Stephen Sitch
- grid.8391.30000 0004 1936 8024College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Tristram C. Hales
- grid.5600.30000 0001 0807 5670School of Earth and Environmental Sciences, Cardiff University, Cardiff, UK
| | - Marcos Adami
- grid.419222.e0000 0001 2116 4512Amazon Regional Center, National Institute for Space Research (INPE), Belém, Brazil
| | - Liana O. Anderson
- National Center for Monitoring and Early Warning of Natural Disaster (CEMADEN), São José dos Campos, Brazil
| | - Luiz E. O. C. Aragão
- grid.419222.e0000 0001 2116 4512Earth Observation and Geoinformatics Division, National Institute for Space Research (INPE), São José dos Campos, Brazil ,grid.8391.30000 0004 1936 8024College of Life and Environmental Sciences, University of Exeter, Exeter, UK
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9
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Medeiros-Sarmento PSD, Ferreira LV, Gastauer M. Natural regeneration triggers compositional and functional shifts in soil seed banks. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141934. [PMID: 32889317 DOI: 10.1016/j.scitotenv.2020.141934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/13/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
Secondary forests emerging during traditional shifting cultivation practices are increasingly recognized for their fulfillment of ecosystem services and mitigation potential of climate change and biodiversity losses. The soil seed bank as a recruit reservoir is a limiting factor for natural forest regeneration of such secondary forests and is decisive for the formation and restitution of the post-disturbance community. The aim of this study was to compare the composition of the soil seed bank along a natural regeneration chronosequence from the Caxiuanã National Forest, eastern Amazon, including old-growth reference sites. We sampled standing vegetation, soil properties and soil seed banks and compared the density and species richness of different life forms among different regeneration stages. Using nonmetric, multiple scaling, we compared the composition of the soil seed bank among different regeneration stages and with standing vegetation composition. Furthermore, we outlined the influence of stand age, vegetation structure and soil properties on the density, richness and functional characterization of the soil seed bank using mixed effect models. The soil seed bank was dominated by herb seeds in all regeneration stages, and the density and richness of tree seeds increased with regeneration time and recovery of vegetation structure. Seed bank composition changed gradually with regeneration advance and differed from standing vegetation, containing a high amount of allochthonous seeds, especially in older stands. This observation highlights the importance of dispersal and habitat connectivity for the natural regeneration of these secondary forests. Shifts in soil seed bank composition towards slow-growing, animal-dispersed, non-pioneer species with larger, recalcitrant seeds in older regeneration stands indicate changes in vegetation composition along succession. Thus, our data indicate the importance of connectivity for forest regeneration and long fallow periods (> 40 years) to increase the performance of ecosystem services, resilience and stability of secondary forests arising during shifting cultivation practices.
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Affiliation(s)
- Priscila Sanjuan de Medeiros-Sarmento
- Instituto Tecnológico Vale, Boaventura da Silva, 955, Umarizal, CEP 66055-200 Belém, Pará, Brazil; Museu Paraense Emílio Goeldi, CBO, Avenida Perimetral, 1901, Terra Firme, CEP 66077-830 Belém, Pará, Brazil
| | - Leandro Valle Ferreira
- Museu Paraense Emílio Goeldi, CBO, Avenida Perimetral, 1901, Terra Firme, CEP 66077-830 Belém, Pará, Brazil
| | - Markus Gastauer
- Instituto Tecnológico Vale, Boaventura da Silva, 955, Umarizal, CEP 66055-200 Belém, Pará, Brazil.
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10
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César RG, Moreno VDS, Coletta GD, Schweizer D, Chazdon RL, Barlow J, Ferraz SFB, Crouzeilles R, Brancalion PHS. It is not just about time: Agricultural practices and surrounding forest cover affect secondary forest recovery in agricultural landscapes. Biotropica 2021. [DOI: 10.1111/btp.12893] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ricardo G. César
- Department of Forest Sciences, “Luiz de Queiroz” College of Agriculture University of São Paulo Piracicaba Brazil
| | - Vanessa de S. Moreno
- Department of Forest Sciences, “Luiz de Queiroz” College of Agriculture University of São Paulo Piracicaba Brazil
| | - Gabriel D. Coletta
- Plant Biology Graduate Program, Biology Institute University of Campinas Campinas Brazil
| | - Daniella Schweizer
- Department of Forest Sciences, “Luiz de Queiroz” College of Agriculture University of São Paulo Piracicaba Brazil
| | - Robin L. Chazdon
- Department of Forest Sciences, “Luiz de Queiroz” College of Agriculture University of São Paulo Piracicaba Brazil
- Department of Ecology and Evolutionary Biology University of Connecticut Storrs CT USA
| | - Jos Barlow
- Lancaster Environment Centre Lancaster University Lancaster UK
| | - Silvio F. B. Ferraz
- Department of Forest Sciences, “Luiz de Queiroz” College of Agriculture University of São Paulo Piracicaba Brazil
| | - Renato Crouzeilles
- International Institute for Sustainability Rio de Janeiro Brazil
- International Institute for Sustainability Australia Canberra ACT Australia
- Mestrado Profissional em Ciências do Meio Ambiente Universidade Veiga de Almeida Rio de Janeiro Brazil
| | - Pedro H. S. Brancalion
- Department of Forest Sciences, “Luiz de Queiroz” College of Agriculture University of São Paulo Piracicaba Brazil
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11
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Model-Based Estimation of Amazonian Forests Recovery Time after Drought and Fire Events. FORESTS 2020. [DOI: 10.3390/f12010008] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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.
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12
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Smith CC, Espírito-Santo FDB, Healey JR, Young PJ, Lennox GD, Ferreira J, Barlow J. Secondary forests offset less than 10% of deforestation-mediated carbon emissions in the Brazilian Amazon. GLOBAL CHANGE BIOLOGY 2020; 26:7006-7020. [PMID: 32969561 DOI: 10.1111/gcb.15352] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 09/01/2020] [Indexed: 06/11/2023]
Abstract
Secondary forests are increasing in the Brazilian Amazon and have been cited as an important mechanism for reducing net carbon emissions. However, our understanding of the contribution of secondary forests to the Amazonian carbon balance is incomplete, and it is unclear to what extent emissions from old-growth deforestation have been offset by secondary forest growth. Using MapBiomas 3.1 and recently refined IPCC carbon sequestration estimates, we mapped the age and extent of secondary forests in the Brazilian Amazon and estimated their role in offsetting old-growth deforestation emissions since 1985. We also assessed whether secondary forests in the Brazilian Amazon are growing in conditions favourable for carbon accumulation in relation to a suite of climatic, landscape and local factors. In 2017, the 129,361 km2 of secondary forest in the Brazilian Amazon stored 0.33 ± 0.05 billion Mg of above-ground carbon but had offset just 9.37% of old-growth emissions since 1985. However, we find that the majority of Brazilian secondary forests are situated in contexts that are less favourable for carbon accumulation than the biome average. Our results demonstrate that old-growth forest loss remains the most important factor determining the carbon balance in the Brazilian Amazon. Understanding the implications of these findings will be essential for improving estimates of secondary forest carbon sequestration potential. More accurate quantification of secondary forest carbon stocks will support the production of appropriate management proposals that can efficiently harness the potential of secondary forests as a low-cost, nature-based tool for mitigating climate change.
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Affiliation(s)
| | - Fernando D B Espírito-Santo
- Leicester Institute of Space and Earth Observation, Centre for Landscape and Climate Research, School of Geography, Geology and Environment, University of Leicester, Leicester, UK
| | - John R Healey
- School of Natural Sciences, College of Environmental Sciences and Engineering, Bangor University, Bangor, UK
| | - Paul J Young
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
- Centre of Excellence for Environmental Data Science, Lancaster University, Lancaster, UK
| | - Gareth D Lennox
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | | | - Jos Barlow
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
- Federal University of Lavras, Minas Gerais, Brazil
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13
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García C, Espelta JM, Hampe A. Managing forest regeneration and expansion at a time of unprecedented global change. J Appl Ecol 2020. [DOI: 10.1111/1365-2664.13797] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cristina García
- Institute of Infection, Veterinary and Ecological Science (IVES) Liverpool UK
- CIBIO/InBIO Universidade do Porto Vairão Portugal
| | - Josep María Espelta
- CREAFBellaterra (Cerdanyola del Vallès) Catalonia Spain
- Universitat Autònoma de BarcelonaBellaterra (Cerdanyola del Vallès) Catalonia Spain
| | - Arndt Hampe
- INRAEUniversity of BordeauxBIOGECO Cestas France
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14
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Silva Junior CHL, Heinrich VHA, Freire ATG, Broggio IS, Rosan TM, Doblas J, Anderson LO, Rousseau GX, Shimabukuro YE, Silva CA, House JI, Aragão LEOC. Benchmark maps of 33 years of secondary forest age for Brazil. Sci Data 2020; 7:269. [PMID: 32796858 PMCID: PMC7427968 DOI: 10.1038/s41597-020-00600-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 07/13/2020] [Indexed: 11/23/2022] Open
Abstract
The restoration and reforestation of 12 million hectares of forests by 2030 are amongst the leading mitigation strategies for reducing carbon emissions within the Brazilian Nationally Determined Contribution targets assumed under the Paris Agreement. Understanding the dynamics of forest cover, which steeply decreased between 1985 and 2018 throughout Brazil, is essential for estimating the global carbon balance and quantifying the provision of ecosystem services. To know the long-term increment, extent, and age of secondary forests is crucial; however, these variables are yet poorly quantified. Here we developed a 30-m spatial resolution dataset of the annual increment, extent, and age of secondary forests for Brazil over the 1986-2018 period. Land-use and land-cover maps from MapBiomas Project (Collection 4.1) were used as input data for our algorithm, implemented in the Google Earth Engine platform. This dataset provides critical spatially explicit information for supporting carbon emissions reduction, biodiversity, and restoration policies, enabling environmental science applications, territorial planning, and subsidizing environmental law enforcement.
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Affiliation(s)
- Celso H L Silva Junior
- Tropical Ecosystems and Environmental Sciences lab - TREES, São José dos Campos, Brazil.
- Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, Brazil.
| | | | - Ana T G Freire
- Programa de Pós-graduação em Biodiversidade e Conservação, Universidade Federal do Maranhão (UFMA), São Luís, Brazil
| | - Igor S Broggio
- Tropical Ecosystems and Environmental Sciences lab - TREES, São José dos Campos, Brazil
- Laboratório de Ciências Ambientais, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes, Brazil
| | | | - Juan Doblas
- Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, Brazil
| | - Liana O Anderson
- Tropical Ecosystems and Environmental Sciences lab - TREES, São José dos Campos, Brazil
- Centro Nacional de Monitoramento e Alertas de Desastres Naturais (Cemaden), São José dos Campos, Brazil
| | - Guillaume X Rousseau
- Programa de Pós-graduação em Agroecologia, Universidade Estadual do Maranhão (UEMA), São Luís, Brazil
| | - Yosio E Shimabukuro
- Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, Brazil
| | - Carlos A Silva
- University of Maryland, College Park, United States of America
- University of Florida, Gainesville, United States of America
| | | | - Luiz E O C Aragão
- Tropical Ecosystems and Environmental Sciences lab - TREES, São José dos Campos, Brazil
- Instituto Nacional de Pesquisas Espaciais (INPE), São José dos Campos, Brazil
- University of Exeter, Exeter, United Kingdom
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