A5033257862- Forest Ecology and Biodiversity Studies
- Forest ecology and management
- Tree-ring climate responses
- Forest Management and Policy
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Plant Water Relations and Carbon Dynamics
- Landslides and related hazards
- Remote Sensing and LiDAR Applications
- Lichen and fungal ecology
- Mycorrhizal Fungi and Plant Interactions
- Peatlands and Wetlands Ecology
- Geology and Paleoclimatology Research
- Land Use and Ecosystem Services
- Species Distribution and Climate Change
- Botany and Plant Ecology Studies
- Remote Sensing in Agriculture
- Forest Insect Ecology and Management
- Climate change and permafrost
- Materials Engineering and Processing
- Agriculture and Rural Development Research
- Plant Ecology and Soil Science
- Climate variability and models
- Microbial Community Ecology and Physiology
- African Botany and Ecology Studies
University of Eastern Finland
2021-2025
Finland University
2025
University of Helsinki
2013-2024
Helsinki Art Museum
2024
Oklahoma Biological Survey
2021
University of Oklahoma
2021
University of Central Oklahoma
2021
Oklahoma State University
2021
Ecological Society of America
2018
John Wiley & Sons (United States)
2018
Abstract Plant traits—the morphological, anatomical, physiological, biochemical and phenological characteristics of plants—determine how plants respond to environmental factors, affect other trophic levels, influence ecosystem properties their benefits detriments people. trait data thus represent the basis for a vast area research spanning from evolutionary biology, community functional ecology, biodiversity conservation, landscape management, restoration, biogeography earth system...
Abstract Tree mortality is a key factor influencing forest functions and dynamics, but our understanding of the mechanisms leading to associated changes in tree growth rates are still limited. We compiled new pan‐continental tree‐ring width database from sites where both dead living trees were sampled (2970 4224 190 sites, including 36 species), compared early recent between that died those survived given event. observed decrease radial before death ca. 84% events. The extent duration these...
Abstract Severe droughts have the potential to reduce forest productivity and trigger tree mortality. Most trees face several drought events during their life therefore resilience dry conditions may be crucial long-term survival. We assessed how growth severe droughts, including its components resistance recovery, is related ability survive future by using a tree-ring database of surviving now-dead from 118 sites (22 species, >3,500 trees). found that, across variety regions species...
Tree mortality is a key driver of forest dynamics and its occurrence projected to increase in the future due climate change. Despite recent advances our understanding physiological mechanisms leading death, we still lack robust indicators risk that could be applied at individual tree scale. Here, build on previous contribution exploring differences growth level between trees died survived given event assess whether changes temporal autocorrelation, variance, synchrony time-series annual...
Significance Forests are experiencing growing risks of drought-induced mortality in a warming world. Yet, ecosystem dynamics following drought remain unknown, representing major limitation to our understanding the ecological consequences climate change. We provide an emerging picture postdrought trajectories based on field indicators forest dynamics. Replacement patterns indicate limited short-term persistence predrought dominant tree species, highlighting potential for reorganization coming...
Abstract Background The global human footprint has fundamentally altered wildfire regimes, creating serious consequences for health, biodiversity, and climate. However, it remains difficult to project how long-term interactions among land use, management, climate change will affect fire behavior, representing a key knowledge gap sustainable management. We used expert assessment combine opinions about past future regimes from 99 researchers. asked quantitative qualitative assessments of the...
Disturbance regimes are changing in forests across the world response to global climate change. Despite profound impacts of disturbances on ecosystem services and biodiversity, assessments at scale remain scarce. Here, we analyzed natural boreal temperate forest ecosystems for period 2001–2014, aiming 1) quantify their within‐ between‐biome variation 2) compare sensitivity biomes. We studied 103 unmanaged landscapes with a total land area 28.2 × 10 6 ha, distributed five continents. A...
In Europe, forest management has controlled dynamics to sustain commodity production over multiple centuries. Yet over-regulation for growth and yield diminishes resilience environmental stress as well threatens biodiversity, leading increasing susceptibility an array of disturbances. These trends have stimulated interest in alternative systems, including natural silviculture (NDS). NDS aims emulate disturbance at stand landscape scales through silvicultural manipulations structure patterns....
We aimed at disentangling the role of different local and regional controls influencing fire occurrence in two geographically distinct forest reserves Finland. used dendrochronological data to reconstruct histories and, using survival analysis, analysed as a function stand (mesic xeric site type, topographical wetness index) landscape characteristics (stand area, neighbouring identity shared border length), study region. In total, we dated 182 fires between 1574 1921. Fires were most active...
Abstract Broad‐scale forest die‐off associated with drought and heat has now been reported from every forested continent, posing a global‐scale challenge to management. Climate‐driven is frequently compounded other drivers of tree mortality, such as altered land use, wildfire, invasive species, making management increasingly complex. Facing similar challenges, rangeland managers have widely adopted the approach developing conceptual models that identify key ecosystem states major types...
Fire is a major disturbance agent in the boreal forest, influencing many current and future ecosystem conditions services. Surprisingly few studies have attempted to improve accuracy of fire-event reconstructions even though estimates occurrence past fires may be biased, reliability models employing those data (e.g. C stock, cycle). This study aimed demonstrate how three types fire proxies – scars from tree rings, sedimentary charcoal and, for first time this context, fungal spores...
In Sweden, the majority of forest area has been altered by industrial forestry over decades. Almost 30 years ago, a shift towards biodiversity-oriented management practices occurred. Here we took advantage long-term data collected Swedish National Forest Inventory to track developmental changes in structural components this time. We assessed that play an important role biodiversity (dead wood, large living trees, tree species composition, and understory vegetation) four types with descending...
Elevation-for-latitude substitution offers a tool for studying the influence of temperature and precipitation variability on vegetation structure composition. Understanding how elevation, aspect, slope patterns may help in predicting climate change influences human forest usage developing strategies ensuring sustained provision ecosystem services. However, most ecological studies have been carried out protected areas, leaving areas used by humans to lesser attention. Therefore, we asked...
Spatial patterns, rates, and temporal variation of standing-tree mortality were studied in unmanaged boreal old-growth forests northeastern Quebec. The study was carried out by sampling living dead trees within 15 transects (400 m long, 40 wide). lay stands that classified according to their species composition three types: dominated black spruce, Picea mariana (Mill.) BSP; mixed P. balsam fir, Abies balsamea (L.) Mill.; A. balsamea. patterns analysed using Ripley's K function. year death...
Question: What were the temporal patterns and rates of tree mortality in a recent episodic event? Have similar events occurred past, does climatic variability play role disturbance regime? Location: Intact Picea abies-dominated taiga Arkhangelsk region, northwestern Russia. Methods: We reconstructed past history by applying dendroecological methods five forest stands related these to data. The other potential causes was assessed field inventory. Results: episode lasted from 1999 2004,...
Summary The elevational limit of trees (henceforth, the ‘tree line’) is widely considered to be a sensitive indicator environmental change. Here, we document 20th century tree line advance and increase in population at ecotone, along Pinus sylvestris ‐dominated slope north‐eastern Finland, conditions where growth recruitment have generally been linked temperature variation. Using ages (growth 1.3 m height) an transect, compared variation associated with dynamics, seed cone crops, reindeer...
Abstract Forest fires are a key disturbance in boreal forests, and characteristics of fire regimes among the most important factors explaining variation forest structure species composition. The occurrence is connected with climate, but earlier, mostly local‐scale studies northern European forests have provided little insight into fire–climate relationship before modern suppression period. Here, we compiled annually resolved history, temperature, precipitation reconstructions from eastern...