Warming and Rising CO2 Concentrations Drive Global Woody Encroachment from 2001 to 2020 DOI Creative Commons
Mengchen Yu, Yaoyao Zheng, Zaichun Zhu

et al.

Ecosystem Health and Sustainability, Journal Year: 2024, Volume and Issue: 10

Published: Jan. 1, 2024

Woody plant encroachment (WPE) has been widely studied, yet the spatiotemporal pattern of global WPE and its drivers remain unclear. Here, based on long-term remote sensing observations, we investigated dynamics from 2001 to 2020 assessed contributions changes in main environmental factors. We found a significantly increasing trend (0.25% −1 , P < 0.01), resulting pronounced gain slight loss woody vegetation (0.29% 0.04% 0.01, respectively). The trends was characterized by large spatial heterogeneity, with 82.95% areas experiencing an expansion plants. then used random forest model incorporating key factors investigate complicated driving mechanisms WPE. Our results identified warming elevated CO 2 concentrations as primary dynamics, given their substantial (0.66% 0.32% Changing precipitation regime crucial, but showed great heterogeneity offset each other, ultimately leading smaller contribution (0.09% 0.05). In contrast, varying radiation burned had minimal effects (−0.04% > 0.05 −0.03% 0.01). also that local factors, such human activities natural disturbances, were non-negligible (0.07% study provides comprehensive picture WPE, enhancing our understanding biome transitions response changes.

Language: Английский

Integrated fire management as an adaptation and mitigation strategy to altered fire regimes DOI Creative Commons
Imma Oliveras Menor, Núria Prat-Guitart,

Gian Luca Spadoni

et al.

Communications Earth & Environment, Journal Year: 2025, Volume and Issue: 6(1)

Published: March 15, 2025

Abstract Altered fire regimes are a global challenge, increasingly exacerbated by climate change, which modifies weather and prolongs seasons. These changing conditions heighten the vulnerability of ecosystems human populations to impacts wildfires on environment, society, economy. The rapid pace these changes exposes significant gaps in knowledge, tools, technology, governance structures needed adopt informed, holistic approaches management that address both current future challenges. Integrated Fire Management is an approach combines prevention, response, recovery while integrating ecological, socio-economic, cultural factors into strategies. However, remains highly context-dependent, encompassing wide array practices with varying degrees ecological societal integration. This review explores as adaptation mitigation strategy for altered regimes. It provides overview progress challenges associated implementing across different regions worldwide. also proposes five core objectives outlines roadmap incremental steps advancing adapt ongoing regimes, thereby maximizing its potential benefit people nature.

Language: Английский

Citations

2

Seasonal spatial-temporal trends of vegetation recovery in burned areas across Africa DOI Creative Commons
Oswaldo Maillard, Natasha Ribeiro, Amanda Armstrong

et al.

PLoS ONE, Journal Year: 2025, Volume and Issue: 20(2), P. e0316472 - e0316472

Published: Feb. 3, 2025

Africa is entering a new fire paradigm, with climate change and increasing anthropogenic pressure shifting the patterns of frequency severity. Thus, it crucial to use available information technologies understand vegetation dynamics during post-fire recovery processes. The main objective this study was evaluate seasonal spatio-temporal trends in response fires across Africa, from 2001 2020. Non-parametric tests were used analyze MODIS Normalized Difference Vegetation Index (NDVI) products comparing following three-month periods: December-February (DJF), March-May (MAM), June-August (JJA), September-November (SON). We evaluated spatial NDVI burned areas by hemisphere, territory, or country, land cover types, recurrences, focus on forested areas. relationships between trend three climatic variables (i.e. maximum air temperature, precipitation, vapor deficit) then analyzed. For 8.7 million km 2 over past 22 years, we observed several NDVI. highest proportions ( p < 0.05) recorded MAM for both hemispheres, 22.0% Northern Hemisphere 17.4% Southern Hemisphere. In contrast, decreasing 0.05), showed 4.8–5.5% area Hemisphere, peaking JJA, while range 7.1 10.9% proportion also JJA. Regarding 48.0% occurred forests, 24.1% shrublands, 16.6% agricultural fields, 8.9% grasslands/savannas. Consistent overall trend, exhibiting an values within regions had MAM, 19.9% 20.6% Conversely, largest (p DJF (2.7–2.9%) JJA (7.2–10.4%). Seasonally, found high variability regeneration based recurrences. addition, that variables, deficit more related levels. These results indicate strong component seasonality respect fires, increase decrease different covers African continent, they contribute understanding conditions recovery. This helpful researchers decision makers act specific sites restoration

Language: Английский

Citations

0

Resilience, remoteness and war shape the land cover dynamics in one of the world's largest miombo woodlands DOI Creative Commons
Christopher A. Andrews, Samuel Bowers,

Luisa F. Escobar-Alvarado

et al.

Trees Forests and People, Journal Year: 2024, Volume and Issue: 17, P. 100623 - 100623

Published: July 19, 2024

The highlands of southeast Angola are one the world's largest intact formations miombo woodland. Recent interest from conservation groups is increasing possibility a new protected area in this conflict-afflicted, remote region, contributing to "30 × 30" target Global Biodiversity Framework. With potential for area, it important quantify extent and change natural anthropogenic land covers not least because close dependence livelihoods on resources miombo. We developed 1990–2020 cover time series, analysing deforestation, canopy opening, closure, vegetation regrowth after disturbance. Regional woodland has remained roughly constant despite frequent transitions between dense open woodlands. Canopy opening peaked post-civil war, potentially related resettlement displaced people. Over 30 years, 61 % ± 2 was offset by subsequent which decade war ended, indicating resilience systems. A resource-use frontier, consisting deforestation evident north-west likely driven urban demand agricultural products, charcoal, timber other wood-derived goods. distinct "core" dynamic occupies 52 study where there no evidence that shifting cultivation local net cause change. do find extensive woody encroachment, only region being encroached vegetation. This closure associated with remoteness pressures biophysical drivers facilitate growth. Policymakers managers can use these data aid locating prioritising interventions sustainably produce wood fuel products meet demand. Additionally, supporting conditions maintaining both processes areas crucial achieving equitably.

Language: Английский

Citations

3

Warming and Rising CO2 Concentrations Drive Global Woody Encroachment from 2001 to 2020 DOI Creative Commons
Mengchen Yu, Yaoyao Zheng, Zaichun Zhu

et al.

Ecosystem Health and Sustainability, Journal Year: 2024, Volume and Issue: 10

Published: Jan. 1, 2024

Woody plant encroachment (WPE) has been widely studied, yet the spatiotemporal pattern of global WPE and its drivers remain unclear. Here, based on long-term remote sensing observations, we investigated dynamics from 2001 to 2020 assessed contributions changes in main environmental factors. We found a significantly increasing trend (0.25% −1 , P < 0.01), resulting pronounced gain slight loss woody vegetation (0.29% 0.04% 0.01, respectively). The trends was characterized by large spatial heterogeneity, with 82.95% areas experiencing an expansion plants. then used random forest model incorporating key factors investigate complicated driving mechanisms WPE. Our results identified warming elevated CO 2 concentrations as primary dynamics, given their substantial (0.66% 0.32% Changing precipitation regime crucial, but showed great heterogeneity offset each other, ultimately leading smaller contribution (0.09% 0.05). In contrast, varying radiation burned had minimal effects (−0.04% > 0.05 −0.03% 0.01). also that local factors, such human activities natural disturbances, were non-negligible (0.07% study provides comprehensive picture WPE, enhancing our understanding biome transitions response changes.

Language: Английский

Citations

0