Tree biomass models for the entire production cycle of Quercus suber

iForest - Biogeosciences and Forestry, Год журнала: 2025, Номер 18(1), С. 38 - 44

Опубликована: Фев. 28, 2025

Язык: Английский

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Cork Oak Regeneration Prediction Through Multilayer Perceptron Architectures

Forests, Год журнала: 2025, Номер 16(4), С. 645 - 645

Опубликована: Апрель 8, 2025

In Mediterranean ecosystems, a thorough understanding of seedling regeneration dynamics as well good predictive ability the process is essential for sustainable forest management. Leveraging capacity multilayer perceptron (MLP) recognized artificial intelligence methodology, authors analyzed real case study with dataset encompassing environmental, ecological, and forestry variables. The focused on cork oak (Quercus suber, L.) dynamic, which critical maintaining ecosystem resilience. A set 10 MLP block from 5 to 50 neurons hyperbolic tangent (TanH), linear (LIN), Gaussian (GAUS) activation function were tested their performance purposes was compared traditional quantitative approaches. configured 40–50 per (TanH, LIN, GAUS) demonstrated outstanding performance, achieving an area under curve (AUC) receiver operating characteristic precision-recall scores above 0.80. These models made few prediction errors, effectively explaining majority data variance, indicated by high generalized R2 low mislearning ratio. This approach outperformed statistical in predicting regeneration. Tree density, stand density index, acorn number played important role, influencing prediction. conclusion, results this research determined importance AI classification modeling technique regeneration, providing practical references future management strategy decisions.

Язык: Английский

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Regeneration Patterns in Cork Oak (Quercus suber L.) Stands: Insights from Transect and Cluster Sampling Inventory Designs

Forests, Год журнала: 2025, Номер 16(5), С. 751 - 751

Опубликована: Апрель 28, 2025

The resilience and regeneration of cork oak (Quercus suber L.) play a central role in sustaining the European landscape, particularly within socio-economic ecological frameworks Western Mediterranean. This species has noticeable ability to withstand drought temperature extremes. However, its natural is increasingly challenged by climate change associated extreme weather events, as well competition among individuals for light, water, nutrients. Monitoring this process field can be time-consuming, requiring use sampling techniques identification appropriate inventory design (ISD) schemes. Line transect (LT) radial cluster (RC) designs are widely used studies, botanical research, plant distribution assessments, other environmental forestry studies. research compares two (line vs. cluster) inventorying monitoring dynamics at initial development stages oak. In particular, study evaluates influences design, time, acorn density on total living dead seedlings over two-year period, using reference Mediterranean Northern Portugal. results confirm critical availability seedling ecosystems emphasize temporal increase death seedlings, markedly influenced day year. component had substantial impact mortality, which increased 5.00‰ per day, meaning that one died approximately every 200 days, whereas mortality spikes occur specific suggesting factors affecting viability. also shows differences estimates between designs. line records lower than design. highlight an important but often overlooked source variation forest emphasizing need careful consideration methods ensure effective data collection accurate representation dynamics, ultimately supporting efforts enhance against competitive pressures.

Язык: Английский

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Relation of the soil microbiota of cork oak groves and surrounding grasslands to tree decline

Applied Soil Ecology, Год журнала: 2025, Номер 212, С. 106165 - 106165

Опубликована: Май 9, 2025

Язык: Английский

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Tunisia: Genetic Diversity Assessment of Cork Oak Provenance Trials in the Context of Climate Change

Опубликована: Янв. 1, 2025

Abstract The cork oak ( Quercus suber L.) is a native species in Tunisian forests; it plays key role from an ecological and socio-economic point of view. As result serious biotic abiotic problems, its ecosystem has significantly deteriorated, natural regeneration random nearly absent. Considering this situation, foresters have been assisting by creating new plantations. Within the framework EUFORGEN network, project collected seedlings Q. various origins northern Tunisia 1997. aim was to identify best-adapted material ensure success sustainability Samples 26 populations distribution range were established five sites with differing soil climatic conditions. This study evaluates behavior these different provenances experimental site terms survival height growth after 7 14 years, respectively. cluster analysis (UPGMA) showed two groups: one Morocco, Spain, Portugal other Italy, Algeria, Tunisia. Overall, (Fernana) Italian (Puglia) prove successful well adapted edapho-climatic conditions specific trial resistant attacks.

Язык: Английский

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Seasonal and Edaphic Modulation Influences the Phenolic Contents and Antioxidant Activity in Cork Oak (Quercus suber L.): Evidence from the Algerian Mediterranean Forest

Forests, Год журнала: 2025, Номер 16(6), С. 906 - 906

Опубликована: Май 28, 2025

The cork oak (Quercus suber L.), an emblematic species of Mediterranean biodiversity, is the focus this study, which aimed to characterize relationships between abiotic factors and variations in its secondary metabolites. Rhizospheric soil samples (collected at two depths: 0–15 cm 15–25 cm), roots, leaves were gathered Azouza forest (Kabylia, Algeria) during winter summer seasons 2019. Analyses conducted on total polyphenol (TPP), flavonoid (FLAV), tannin (TT) contents, their antioxidant activities assessed using DPPH, FRAP, TAC assays. results reveal seasonal soil-depth variability, with highest concentrations observed (170.2 mg GAE/g DW for TPP, 14.15 TAE/g TT, 6.4 QE/g FLAV). Antioxidant activity was also more pronounced leaves, IC50 values 130.90 µg/mL (DPPH) 61.22 (FRAP). Roots from deeper layer (15–25 cm) exhibited higher phenolic compound levels greater compared those superficial (0–15 cm). Principal component analysis showed that 93% variance explained by sampling depth, confirming key role metabolite synthesis biological activity. oak’s biochemical adaptability environmental changes reveals climate adaptation strategies, highlighting soil–plant influences metabolic responses ecosystems.

Язык: Английский

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Seed Germination Characteristics of a Critically Endangered Evergreen Oak—Quercus marlipoensis (Fagaceae) and Their Conservation Implications

Forests, Год журнала: 2024, Номер 15(2), С. 235 - 235

Опубликована: Янв. 26, 2024

Seed germination is among the most crucial and vulnerable stages in plant life cycles. Quercus marlipoensis a critically endangered sclerophyllous oak. Only one population has ever been found worldwide tropical montane cloud forests of southeastern Yunnan, China, it shown difficulties with regeneration. However, its seed biological traits key restrictive factors remain unknown. We investigate impacts scarification, temperature, water potential on Q. marlipoensis. Results show that seeds typical epicotyl dormancy. The increased when removing part or all pericarp cotyledon (one-third two-thirds). can germinate at 5 to 30 °C, but highest T50 was achieved 25 °C. When decreased from 0 −1.0 MPa, rate time increased. are typically recalcitrant highly sensitive moisture loss, species tolerate animal predation low temperatures. more frequent climatic extremes droughts Indo-China region will severely degrade natural habitats. Therefore, ex situ conservation preserve germplasm introduce seedlings into suitable habitat essential for management.

Язык: Английский

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Effects of shrub species dominance and diversity on oak seedling survival in Mediterranean woodlands: The interplay of abiotic conditions and plant traits

Forest Ecology and Management, Год журнала: 2024, Номер 555, С. 121713 - 121713

Опубликована: Янв. 29, 2024

Understanding plant species interactions, including facilitation and competition, is fundamental to improve the success of woody seedling establishment. This particularly important for restoration sclerophyllous oak forests, one main forest types in Mediterranean Europe currently facing a severe lack natural regeneration. However, effects shrub communities dominated by different diverse on establishment oaks remains poorly understood. We conducted 3-year experimental study cork (Quercus suber L.) woodlands Portugal assess dominance diversity community associated abiotic resources emergence survival. hypothesized that survival vary with identity dominant shrub, due distinct functional traits affecting understory conditions. Additionally, we predict seedlings increases diversity, driven net processes. sowed 960 acorns across five replicated microhabitats: four without cover. used Bayesian statistics model as function microhabitat type variables (soil water temperature, soil characteristics leaf area index). Seedling varied microhabitat. The highest was observed microhabitats characterized higher lowest Cistus ladanifer. Maximum temperature but lower open conditions or areas sparser Water logging constrained survival, potassium all microhabitats. Our shows interactions between their neighbors are dependent, more composition improves likely ameliorate physical environment promote facilitation. Management forests need consider specificity community, well stages early life-cycle, identify most favorable becomes under frequent climatic extremes predicted Europe.

Язык: Английский

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Modeling Cork Yield, Thickness, Price, and Gross Income in the Portuguese Cork Oak Montado

Forests, Год журнала: 2024, Номер 15(12), С. 2163 - 2163

Опубликована: Дек. 8, 2024

The cork oak (Quercus suber L.) woodlands, known as montados in Portugal, hold significant economic, cultural, social, and environmental value. They are found the Mediterranean Sea basin, particularly Iberian Peninsula, sustain various activities like silvopastoralism, with being a primary product. Despite its economic significance, challenges such climate change threaten sustainability. This study aimed to analyze edaphoclimatic variables affecting yield, thickness, price, gross income Alentejo region of Portugal. A total 35 farmers were selected for data collection included this study. Multivariable linear regressions performed establish relationships between dependent variables, factors, tree densities. higher density correlates an increased yield but decreased thickness. Soil pH affects lower favoring yields thinner cork. clay silt content horizon soil C enhances thickness raises price reduces yield. Higher accumulated precipitation temperatures contribute thicknesses It is concluded that independent complex partially explainable. Understanding these paramount ensure sustainable management practices adopted capable addressing issues raised current context change.

Язык: Английский

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Genotypic and genetic diversity of Maâmora’s cork oak forest using simple sequence repeats (SSR) and inter simple sequence repeats (ISSR) markers for conservation

Genetic Resources and Crop Evolution, Год журнала: 2023, Номер 71(6), С. 2399 - 2414

Опубликована: Ноя. 9, 2023

Язык: Английский

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