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75 results for “Old-growth forests”
Figure 1 in Composition and habitat use of small mammals in old-growth mountain forests
Figure 1. Location of the study area in the Aigüestortes i Estany de Sant Maurici National Park (in dark grey) and its peripheral area (in light grey), indicating the UTM (Universal Transverse Mercator) coordinates. White squares, Abies alba plots; black squares, Pinus uncinata plots. Contour lines represent different altitude levels. Darker areas within the National Park boundaries correspond to lakes.
Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest
<p>Nitrogen (N) deposition is known to increase carbon (C) sequestration in N-limited boreal forests. However, the long-term effects of N deposition on ecosystem carbon fluxes have been rarely investigated in old-growth boreal forests. Here we show that decade-long experimental N additions significantly stimulated net primary production (NPP) but the effect decreased with increasing N loads. The effect on soil heterotrophic respiration (Rh) shifted from a stimulation at low-level N additions to an inhibition at higher levels of N additions. Consequently, low-level N additions resulted in a neutral effect on net ecosystem productivity (NEP), due to a comparable stimulating effect on NPP and Rh, while NEP was increased by high-level N additions. Moreover, we found nonlinear temporal responses of NPP, Rh and NEP to low-level N additions. Our findings imply that actual N deposition in boreal forests likely exerts a minor contribution to their soil C storage.</p>
Data from: Topsoil removal through scarification improves natural regeneration in high-graded Nothofagus old-growth forests
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Data from: Fine-root exploitation strategies differ in tropical old-growth and logged-over forests in Ghana
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Nonlinear responses of ecosystem carbon fluxes to nitrogen deposition in an old-growth boreal forest
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Annual mortality and growth index for 17 tree species across entire size classes in the Ogawa Forest Reserve, an old-growth deciduous forest, central Japan
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Soil organic carbon accumulation modes between pioneer and old-growth forest ecosystems
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Data from: Linking radial growth patterns and moderate-severity disturbance dynamics in boreal old-growth forests driven by recurrent insect outbreaks: a tale of opportunities, successes, and failures
<p>In boreal landscapes, emphasis is currently placed on close-to-nature management strategies, which aim to maintain the biodiversity and ecosystem services related to old-growth forests. The success of these strategies, however, depends on an accurate understanding of the dynamics within these forests. This study aims to reconstruct the disturbance and post-disturbance dynamics in boreal old-growth forests that are driven by recurrent moderate-severity disturbances. We studied eight old-growth forests in Québec, Canada, that has recorded recurrent and moderate to severe spruce budworm (Choristoneura fumiferana [Clem.]) outbreaks over the 20th century. To reconstruct the disturbance history and the post-disturbance dynamics of the study sites, we used dendrochronological data and k-means clustering to identify growth releases and growth patterns in the studied trees. We identified nine growth patterns; these patterns represented trees differing in age, size, and canopy layer, and indicated different tree histories. Spruce budworm outbreaks caused recurrent moderate-severity disturbances within the study sites. The canopy gaps created by these disturbances were filled mainly by understorey trees, which responded by single and significant increases in radial growth and height. In contrast, overstorey trees had little influence on gap filling; thus, trees were mostly from the dominant and codominant canopy layers. Our study underlines the resistance of boreal old-growth forests to recurrent and moderate-severity disturbances, as understorey trees can rapidly fill the resulting gaps. However, trees that are unable to attain the canopy following the disturbance then tend to remain in the lower canopy layers. Therefore, reaching the canopy represents a once-in-a-lifetime opportunity, where success or failure depends on a relatively short window of time. This gap-filling dynamic produces, however, a vertical structure that is often similar to the expected structure in even-aged forests. Our results highlight the efficacy of identifying tree growth patterns to reconstruct stand disturbance dynamics and contribute to developing closer to nature forest management strategies.</p>
Figure 10 in Application Of Lichen Functional Traits In Identification Of Temperate Old-Growth Broad-Leaved Forests
Figure 10. Lichen spore type in old (oldgrowth), middle (middleaged) and young broadleaved forest stands.
Figure 1 in First record of the saproxylic beetle Corticeus (= Hypophloeus) unicolor Piller & Mitterpacher, 1783 in Montenegro (Coleoptera: Tenebrionidae) with comments on old-growth forests conservation in the Country
Figure 1. Location of discovery of C. unicolor in Montenegro in the Dinaric Alps (Biogradska Gora National Park) (from Parisi, 2023).
Great tit (Parus major) nestlings have longer telomeres in old-growth forests than in young forests
<p>Modification and deterioration of old-growth forests by industrial forestry have seriously threatened species diversity worldwide. The loss of natural habitats increases the concentration of circulating glucocorticoids and incurs chronic stress in animals, influencing the immune system, growth, survival, and lifespan of animals inhabiting such areas. In this study, we tested whether great tit (Parus major) nestlings grown in old-growth unmanaged coniferous forests have longer telomeres than great tit nestlings developing in young managed coniferous forests. This study showed that the patches of young managed coniferous forests had lower larval biomass than old-growth forests. Since insect larvae are the preferred food for great tit nestlings, the shortage of food may divert energy resources away from growth, which can show up as physiological stress, often raising the heterophil/lymphocyte (H/L) ratio. The H/L ratio revealed a significant difference in stress levels, being the highest in great tit nestlings developing in young-managed pine forests. We also found that the development of great tit nestlings in young managed forests had significantly shorter telomeres than in old-growth forests. Although nestling survival did not differ between the habitats, nestlings growing up in old-growth forests had greater telomere lengths, which can positively affect their lifespan. Our results suggest that the forest habitats affected by industrial forestry may represent ecological traps as the development of young birds in deteriorated environments can affect the age structure of populations.</p>
Figure 2 from: Malíček J, Palice Z, Vondrák J, Łubek A, Kukwa M (2018) Bacidia albogranulosa (Ramalinaceae, lichenized Ascomycota), a new sorediate lichen from European old-growth forests. MycoKeys 44: 51-62. https://doi.org/10.3897/mycokeys.44.30199
Figure 2 Phylogeny of selected members of Bacidia s.str. This is a Bayesian phylogenetic reconstruction based on nrITS and mtSSU sequences. The new species, Bacidiaalbogranulosa, is indicated in bold. Branches with > 0.95 Bayesian posterior probability values are indicated by thicker lines. Bayesian posterior probabilities (first value) and maximum likelihood bootstrap percentages (second value) are indicated.
Figure 1 from: Malíček J, Palice Z, Vondrák J, Łubek A, Kukwa M (2018) Bacidia albogranulosa (Ramalinaceae, lichenized Ascomycota), a new sorediate lichen from European old-growth forests. MycoKeys 44: 51-62. https://doi.org/10.3897/mycokeys.44.30199
Figure 1 Morphology of Bacidiaalbogranulosa. A Holotype (PRA/Vondrák 11888) B Common phenotype (Malíček 10802) C Typical growth form on old beech trees (Malíček 8166) D Phenotype with abundant soredia forming a seemingly leprose thallus (Malíček 8013) E Detail of soredia (Malíček 8166) F Soredia arising from granules (PRA/Vondrák 11888). Scale bars: 1 mm (A−C), 0.5 mm (D), 0.2 mm (E, F). Photos by J. Malíček (A, B) and J. Machač (C−F).
Data from: Linking radial growth patterns and moderate-severity disturbance dynamics in boreal old-growth forests driven by recurrent insect outbreaks: a tale of opportunities, successes, and failures
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Climate anomalies and neighbourhood crowding interact in shaping tree growth in old-growth and selectively-logged tropical forests
<p>Species mean information for the six leaf water-related traits used in the paper titled: Climate anomalies and neighbourhood crowding interact in shaping tree growth in old-growth and selectively-logged tropical forests.</p>
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.