A5088095379- Fire effects on ecosystems
- Forest Ecology and Biodiversity Studies
- Forest ecology and management
- Forest Management and Policy
- Tree-ring climate responses
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Rangeland and Wildlife Management
- Landslides and related hazards
- Geology and Paleoclimatology Research
- Spaceflight effects on biology
- Lichen and fungal ecology
- Aeolian processes and effects
- Botany and Plant Ecology Studies
- Methane Hydrates and Related Phenomena
- Fire dynamics and safety research
- Wildlife Ecology and Conservation
- Environmental Science and Technology
- Remote Sensing and LiDAR Applications
- Geological Studies and Exploration
- Plant and animal studies
- Environmental Conservation and Management
- Animal Ecology and Behavior Studies
Swiss Federal Institute for Forest, Snow and Landscape Research
2019-2025
Université du Québec à Montréal
2014-2019
Abstract Fire regimes in North American forests are diverse and modern fire records often too short to capture important patterns, trends, feedbacks, drivers of variability. Tree‐ring scars provide valuable perspectives on regimes, including centuries‐long year, season, frequency, severity, size. Here, we introduce the newly compiled tree‐ring fire‐scar network (NAFSN), which contains 2562 sites, >37,000 fire‐scarred trees, covers large parts America. We investigate NAFSN terms geography,...
Forests can contribute to climate change mitigation by sequestering carbon when management intensity is reduced. However, there high uncertainty regarding biomass dynamics in temperate forests after the cessation of management. We used forest inventory data from an extensive network 224 plots 37 natural reserves (NFR) covering a wide environmental gradient with mean annual temperatures ranging 1 10.4 °C and precipitation 901 2317 mm. Inventories had been conducted approximately every 10...
ABSTRACT Aim Increasing aridity has driven widespread synchronous fire occurrence in recent decades across North America. The lack of historical (pre‐1880) records limits our ability to understand long‐term continental fire‐climate dynamics. goal this study is use tree‐ring reconstructions determine the relationships between spatiotemporal patterns climate and American forests, whether they are stable through time. This information will address a major knowledge gap required inform...
Rapid increases in wildfire area burned across North American forests pose novel challenges for managers and society. Increasing raises questions about whether, to what degree, contemporary fire regimes (1984–2022) are still departed from historical (pre-1880). We use the tree-ring fire-scar network (NAFSN), a multi-century record comprising >1800 sites spanning diverse forest types, perimeters ask whether there is surplus or deficit, recent years unprecedented relative regimes. Our results...
Les forêts suisses et françaises font face à des défis similaires liés aux changements climatiques. Des outils sont nécessaires pour guider les gestionnaires forestiers dans l’adaptation de leurs pratiques. La Suisse utilise une approche stationnelle basée sur types stations avec l’outil Tree App, tandis que l’Office National Forêts, gestionnaire publiques françaises, se concentre niches climatiques essences Zoom 50. Malgré différences, deux approches visent anticiper adapter la gestion...
We use seed count data from a New Zealand mono-specific mountain beech forest to test for decadal trends in production along an elevation gradient relation changes climate. Seedfall was collected (1965 2009) trays located on transect lines at fixed elevations (1020 1370 m). counted the number of seeds catch each tray, year, and determined viable seeds. Climate variables were obtained nearby (<2 km) climate station (914-m elevation). Variables sum or mean daily measurements, using periods...
Warning This article contains terms, descriptions, and opinions used for historical context that may be culturally sensitive some readers. Background Understanding drivers of boreal forest dynamics supports adaptation strategies in the climate change. Aims We aimed to understand how burn rates varied since early 1700s North American forests. Methods 16 fire-history study sites distributed across such forests investigated variation period spanning 1700–1990. These were benchmarked against...
Fire is the main disturbance in North American coniferous boreal forests. In Northern Quebec, Canada, where forest management not allowed, landscape gradually constituted of more opened lichen woodlands. Those forests are discontinuous and show a low regeneration potential resulting from cumulative effects harsh climatic conditions very short fire intervals. climate change context, because industry interested opening new territories to north, it crucial better understand how why risk varies...
Abstract. Wildland fires are the main natural disturbance shaping forest structure and composition in eastern boreal Canada. On average, more than 700 000 ha of burns annually causes as much CAD 2.9 million worth damage. Although we know that occurrence depends upon coincidence favourable conditions for fire ignition, propagation, fuel availability, interplay between these three drivers spatiotemporal patterns Canada remains to be evaluated. The goal this study was reconstruct activity...
Wildfires play a crucial role in maintaining ecological and societal functions of North American boreal forests. Because their contagious way spreading, using statistical methods dealing with spatial autocorrelation has become major challenge fire studies analyzing how environmental factors affect variability. We aimed to demonstrate the performance spatially explicit method accounting for burn rates modelling, use this determine relative contribution climate, physical environment vegetation...
Boreal forests subject to low fire activity are complex ecosystems in terms of structure and dynamics. They have a high ecological value as they contain important proportions old that play crucial role preserving biodiversity functions. also sequester amounts carbon at the landscape level. However, time since controlling different processes attributes those is still poorly understood. The Romaine River area experiences regime characterized by very rare but large fires has recently been...
To understand the state and trends in biodiversity beyond scope of monitoring programs, indicators must be comparable across inventories. Species richness (SR) is one most widely used indicators. However, as SR increases with size area sampled, inventories using different plot sizes are hardly comparable. This study aims at producing a methodological framework that enables comparisons plot-based differing sizes. We National Forest Inventory (NFI) data from Norway, Slovakia, Spain,...
Abstract Tree cores are a highly valuable scientific resource. Annual growth ring data can, for example, improve our understanding of climate change impacts and effects environmental pollution, allow better annual estimations tree patterns carbon storage, help quantify dynamics changes in forest ecosystems. The value coring trees research has been weighted against concerns around the potential harm might cause to trees. To date, there is indeed limited accurately quantifying on only handful...
Abstract In a Europe shaped by centuries of forest management, the task today's scientists in characterising, understanding and modelling natural forests is highly challenging. Although numerous reserves exist, most remain hardly comparable case studies. Contrarily, National Forest Inventories (NFIs) consist systematically distributed sample plots with varying time since last intervention provide representative data. These characteristics make NFIs unique opportunity to investigate hidden...
Forests provide essential ecosystem services that range from the production of timber to mitigation natural hazards. Rapid environmental changes, such as climate warming or intensification disturbance regimes, threaten forests and endanger forest services. In light these challenges, it is understand forests' demographic processes regeneration, growth, mortality their relationship with conditions. Specifically, understanding regeneration process in present‐day crucial since lays foundation...
Abstract Climate changes are expected to progressively increase extreme wildfire frequency in forests. Finding past analogs for periods of biomass burning would provide valuable insights regarding what the effects warming might be tree species distribution, ecosystem integrity, atmospheric greenhouse gas balance, and human safety. Here, we used a network 42 lake-sediment charcoal records across ∼2000 km transect eastern boreal North America infer widespread activity association with climate...
In Canada, recent catastrophic wildfire events raised concern from governments and communities. As climate change is expected to increase fire activity in boreal forests, the need for a better understanding of regimes becoming urgent. This study addresses 1972–2015 spatial distributions cycles, mean size (FireSz) occurrence (mean annual number fires per 100000ha, FireOcc) eastern Canada. The objectives were determine (1) variability fire-regime attributes, (2) capacity FireSz FireOcc...
Abstract. Wildland fires are the main natural disturbance shaping forest structure and composition in eastern boreal Canada. On average, more than 700 000 ha of burns annually, causes as much C$ 2.9 million worth damage. Although we know that occurrence depends upon coincidence favourable conditions for fire ignition, propagation fuel availability, interplay between these three drivers spatiotemporal patterns Canada remains to be evaluated. The goal this study was reconstruct activity during...
Der Schweizer Wald beherbergt zahlreiche Baumarten mit unterschiedlichen ökologischen Ansprüchen an Licht, Nährstoffen und Klima. In der empirischen Waldmodellierung werden ähnliche oft gruppiert, weil zu wenige Beobachtungen vorliegen, um artspezifische Modelle für Einwuchs, Wachstum Mortalität entwickeln. Wir präsentieren eine neue Baumartengruppierung, die ökologische Ansprüche deren Einfluss auf das Wachsen Absterben berücksichtigt.
Introduction: Among terrestrial ecosystems, forests represent large carbon stocks threatened by changing climatic conditions, deforestation, overexploitation, and forest degradation. Close to nature forestry may help continue acting as sinks promoting their resilience against disturbances. The EU decided carry out accounting of emissions removals from managed under the Paris Agreement (PA) using a projected Forest Reference Level (FRL) based on continuation recent management practices....
Dass die Artenvielfalt von der Flächengrösse abhängt, ist ein bekanntes Phänomen. Mit zunehmender Fläche steigt im Allgemeinen Anzahl festgestellter Arten. Dieser Zusammenhang jedoch nicht linear. Die Baumartenvielfalt Wäldern unterschiedlicher Grösse zu vergleichen, stellt deshalb oftmals eine Herausforderung dar. Auf Grundlage Daten des Schweizerischen Landesforstinventars wurde nun Methodik entwickelt, mit Schätzungen zur erwarteten auf beliebige Flächengrössen skaliert werden können. in...
Forests provide essential ecosystem services that range from the production of timber to mitigation natural hazards. Rapid environmental changes, such as climate warming or intensification disturbance regimes, threaten forests and endanger forest services. In light these challenges, it is understand forests’ demographic processes regeneration, growth, mortality their relationship with conditions. Specifically, understanding regeneration process in present-day crucial since lays foundation...