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Povzetek: In addition to being influenced by global drivers, forest herb-layer communities are also shaped by various local factors, such as topography, stand characteristics and soil properties. The responses of ground vegetation were studied in the ravine forests of a Natura 2000 site in eastern Slovenia. A high species richness of 218 plant species was observed in the herb layer, including some woody species. On average, 52.8 different plant species were recorded per plot. Species richness was significantly associated with topographic and forest stand factors, rather than soil characteristics. It was positively associated with altitude and the amount of deadwood and negatively associated with tree height. However, the main predictors for the species composition of the ground vegetation were tree layer cover and soil pH. Among the studied ravine forests, Tilia-dominated stands are characterised by the highest species diversity and the lowest herb-layer cover, indicating a composition of less competitive, site-specific species inhabiting sites with high resource heterogeneity and diverse microhabitats. To preserve the high level of biodiversity of heterogeneous ravine forests and to maintain their favourable conservation status, it is crucial to sustain the natural state of forest soils and stands by implementing appropriate management measures. Such measures may include close-to-nature forest management, which is already being implemented in the studied ravine forests.
Ključne besede: ravine forests, ground vegetation, herb layer, forest stands, topography, soil, Tilio–Acerion, Slovenia
Objavljeno v DiRROS: 23.03.2026; Ogledov: 238; Prenosov: 188
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Povzetek: Cambium phenology is a crucial process in wood production and carbon sequestration of forest ecosystems. Although cambium phenology has been widely studied, research specifically focusing on the cessation of wood formation remains limited. To better understand the influence of environmental and intrinsic factors on the cessation of wood formation, we built and compared three ecophysiological models (temperature sum model, photoperiod-influenced temperature sum model and soil moisture- and photoperiod-influenced temperature sum model) in their ability to predict the date of cessation of xylem cell enlargement (cE) in three major Northern Hemisphere conifer species (Black spruce, Norway spruce and Scots pine). We developed these models based on xylogenesis data collected for 130 site‐years across Europe and Canada. Our results demonstrate that the photoperiod-influenced temperature sum model is well-supported by data across all conifer species, with a RMSE of 9.2 days, suggesting that both temperature and photoperiod are critical drivers of wood growth cessation. However, incorporating soil moisture effects does not improve model performance. Our model effectively captures the inter-site variability in cE across a wide environmental gradient, with a fair model efficiency (ME = 0.51 ± 0.22), but performed less well for annual anomalies (ME = 0.10 ± 0.09). Additionally, we found that the total ring cell number also affected prediction accuracy. Using this model, we reconstructed historical trends in cE over the past six decades and found a trend to delayed cessation dates. This delay varied geographically, with slower shifts at higher latitudes and elevations, likely due to constrained cambial responses and conservative growth strategies in colder regions. Our model framework offers a simple yet accurate approach for predicting wood growth cessation at large spatial scales, providing a basis for integrating cambium phenology into land surface models and forest productivity assessments.
Ključne besede: cambium phenology, ecophysiological models, xylem formation, climate change, global warming, northern hemisphere forests
Objavljeno v DiRROS: 12.02.2026; Ogledov: 597; Prenosov: 282
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Povzetek: To ensure appreciation of forest related nature‘s services, they must be presented to the public in an appropriate way. Humans are usually not willing to pay for something they consider as ‘free goods’. The challenge is changing the mind-set through awareness-raising. A good communication strategy should convey the message as a tangible concern that contributes to the quality of our lives. Communicating nature’s services will help understand the benefits we gain and joy and pleasure they can give us if we treat them with knowledge, respect and wisdom. The actions taken in the past are not giving the results we need. A multi-stakeholder approach can harness the creativity from stakeholders through solution driven dialogue. In the LIFEGENMON project (Life for Forest Genetic Monitoring System) coordinated by Slovenian Forestry Institute, the multi-stakeholder approach is used to communicate the forest related nature’s services and importance of genetic resources. A clear visual and verbal communication brings the key project messages to life. To forge meaningful connections with core stakeholders it is essential to use compelling and targeted messages. Ultimately, the results will demonstrate the value of engaging supporters in co-creating communications to extend reach and impact.
Ključne besede: nature’s services, communicating, forests, society, forest values, multi-stakeholder approach
Objavljeno v DiRROS: 28.01.2026; Ogledov: 354; Prenosov: 466
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Povzetek: Excessive tree mortality is a global concern and remains poorly understood as it is a complex phenomenon. We lack global and temporally continuous coverage on tree mortality data. Ground-based observations on tree mortality, e.g., derived from national inventories, are very sparse, and may not be standardized or spatially explicit. Earth observation data, combined with supervised machine learning, offer a promising approach to map overstory tree mortality in a consistent manner over space and time. However, global-scale machine learning requires broad training data covering a wide range of environmental settings and forest types. Low altitude observation platforms (e.g., drones or airplanes) provide a cost-effective source of training data by capturing high-resolution orthophotos of overstory tree mortality events at centimeter-scale resolution. Here, we introduce deadtrees.earth, an open-access platform hosting more than two thousand centimeter-resolution orthophotos, covering more than 1,000,000 ha, of which more than 58,000 ha are manually annotated with live/dead tree classifications. This community-sourced and rigorously curated dataset can serve as a comprehensive reference dataset to uncover tree mortality patterns from local to global scales using space-based Earth observation data and machine learning models. This will provide the basis to attribute tree mortality patterns to environmental changes or project tree mortality dynamics to the future. The open nature of deadtrees.earth, together with its curation of high-quality, spatially representative, and ecologically diverse data will continuously increase our capacity to uncover and understand tree mortality dynamics.
Ključne besede: orthophoto, drone, tree mortality, remote sensing, database, citizen science, forests
Objavljeno v DiRROS: 16.01.2026; Ogledov: 400; Prenosov: 286
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Ključne besede: socioeconomic development, forest resources, forest ecosystems, forest degradation, forest landscape restoration, forest fire management, urban forests, peri-urban areas, sustainable forest management, Mediterranean region
Objavljeno v DiRROS: 09.01.2026; Ogledov: 666; Prenosov: 554
Celotno besedilo (19,36 MB)
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