Results 61 to 70 of about 1,913 (178)

Variability in morphology of Microsphaera alphitoides Griffon et Maubl. in Poland

open access: yesActa Societatis Botanicorum Poloniae, 2011
The aim of this study was to verify descriptions of the morphology of the fungus responsible for powdery mildew on oak leaves of nursery seedlings and of young trees in forest stands. Infected, fully developed leaves from apical parts of stems of Quercus
Krzysztof Ufnalski, Krystyna Przybył
doaj   +1 more source

Importance of micromorphological characteristics of foliar and pollen grains for delimitation of Oak species in Iran [PDF]

open access: yesتحقیقات جنگل و صنوبر ایران, 2011
Several species of oaks (Quercus spp.) grow abundantly in the Hyrcanian, Arasbaran and Zagros forests of Iran. Taxonomy of oaks is difficult because of it's immense size and wide distribution, heterophylly, hybridization and changes in morphological ...
Parisa Panahi   +3 more
doaj   +1 more source

Simulating past and future refugia for temperate trees in northern Italy

open access: yesEcography, Volume 2026, Issue 7, July 2026.
During the Quaternary, trees responded to the climatic changes of glacial–interglacial cycles with large‐scale range shifts. Over cold glacials, temperate tree species contracted their ranges and survived in areas known as refugia. Several studies point to the Euganean Hills (Colli Euganei), in Veneto, northern Italy, as one of the northernmost ...
Azzurra Pistone   +4 more
wiley   +1 more source

State of the UK Climate in 2025

open access: yesInternational Journal of Climatology, Volume 46, Issue S1, July 2026.
This report provides a summary of the state of the UK's climate in 2025. It is one of a series of annual reports published in the International Journal of Climatology since 2018. It presents the latest assessment of UK climate trends, variations and extremes based on the most up to date observations from the land network of weather stations.
Mike Kendon   +14 more
wiley   +1 more source

Long‐term apparent survival of capercaillie (Tetrao urogallus) translocated from Sweden to east Germany

open access: yesWildlife Biology, Volume 2026, Issue 4, July 2026.
The capercaillie Tetrao urogallus formerly inhabited the forests of Lower Lusatia in eastern Germany but became regionally extirpated by the late 20th century following extensive habitat loss and fragmentation. In response, a reintroduction program was initiated in 2012 after approximately one decade of habitat restoration. Between 2012 and 2024, adult
Tobias Ludwig   +5 more
wiley   +1 more source

From forest stand decline to salvage logging: Cascading impacts on saproxylic beetle diversity

open access: yesJournal of Applied Ecology, Volume 63, Issue 7, July 2026.
Given the pronounced context dependency of the processes driving these cascading community dynamics, and considering the increasing frequency, severity and spatial extent of forest disturbances and global stand decline, it is imperative to integrate this complexity into management and conservation frameworks.
Jérémy Cours   +8 more
wiley   +1 more source

Fractal dimension does not adequately describe the complexity of leaf margin in seedlings of Quercus species

open access: yesAnales del Jardín Botánico de Madrid, 2002
We quantified the complexity of leaf margin in a set of Quercus tree species using fractal dimension estimated by the box-counting method (FDb). Leaves were sampled from seedlings in a set of 15 Quercus species with a wide range of leaf morphology (Q ...
Jesús Julio Camarero   +2 more
doaj   +1 more source

Tree canopy shapes the survival of oak and beech saplings during the regeneration stage along an elevation‐driven temperature gradient

open access: yesJournal of Ecology, Volume 114, Issue 7, July 2026.
Forests are complex, multilayered systems in which canopy cover strongly influences understorey microclimates. Here, we show that the temperature‐buffering effect of the forest canopy affects tree regeneration differently among species along an elevation gradient in the French Pyrenees.
Benjamin Roux   +4 more
wiley   +1 more source

Genetic diversity of Quercus petraea, Quercus frainetto, Quercus pubescens, Quercus cerris in Serbia -a review

open access: yes
Alongside the Iberian and Italian peninsulas, the Balkan Peninsula is considered a genetic hotspot for many oak species. As part of the central and western Balkan region, Serbia is home to six species and five subspecies from the section Quercus and one species from the section Cerris.
Kerkez-Janković, Ivona   +6 more
openaire   +2 more sources

Growth and nutrition of Quercus petraea underplanted in artificial

open access: yesForest Systems, 2011
This study presents results on the growth and nutritional status of Quercus petraea trees underplanted in an artificial pine stand as a conversion strategy. A total of 162 plots of 400 to 800 m2 were established in underplanted pine stands (130 plots), naturally regenerated oaks in pine stands (23 plots) and pure oak plantations (9 plots).
openaire   +4 more sources

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