To assess potential forest compositional responses to exchangeable soil calcium (Caexch) and aluminum (Alexch), we characterized light-dependent growth and mortality of tree seedlings under amendments of CaCl2 and AlCl3 at Hubbard Brook Experimental Forest (HBEF), New Hampshire, U.S.A. Seedlings of Acer saccharum Marsh., Fagus grandifolia Ehrh., Betula alleghaniensis Britton, Abies balsamea (L....

Montane forests in the northeastern United States have experienced symptoms of declining vigor, such as branch dieback and increased mortality, over the last half-century. These declines have been attributed to the cumulative impacts of acid deposition, but reconstructing these declines from tree-ring records has proved difficult because of confounding factors that affect low-frequency growth p...

Crown encroachment by trees surrounding newly formed gaps reduces their size, a fact that may cause error in area-based analyses of rate of gap formation and disturbance intensity. Generally, an estimate of proportional area occupied by age classes within a stand of trees can be obtained by determining the age of a selected canopy tree nearby each of randomly or uniformly located sample points....

In a 4-year study, we investigated changes in leaf physiology, crown morphology and whole-tree biomass allocation in seedlings and saplings of shade-tolerant sugar maple (Acer saccharum Marsh.) and intermediate shade-tolerant yellow birch (Betula alleghaniensis Britt.) growing in natural understory light (0.5 to 35% of full sunlight) or in understory light reduced by 50% with shade nets to simu...

This research investigated the existing conditions and functionality of rows maple trees (Acer L.) (which are traditionally used in our country for urban greening) streets that most frequent terms traffic intensity, ways use measures to maintain greenery (streets I II order) on territory municipality Stari grad (Belgrade). In area a total 39 these categories were surveyed. Rows represented 2 ou...

Chromatographic isolation of the 80% MeOH extract of Acer ginnala (AG) yielded seven galloyl derivatives: gallic acid (1), ginnalin B (2), acertannin (3), maplexin D (4), maplexin E (5), quercetin-3-O-(2''-galloyl)-α-L-rhamnopyranoside (6), and kaempferol-3-O-(2''-galloyl)-α-L-rhamnopyranoside (7). This is the first study to report the isolation of compounds 4 and 5 from AG. Galloyl derivatives...

The Board of Appeal (BoA) the Agency for Cooperation Energy Regulators (ACER) belongs to category appeal bodies hearing appeals against deci-sions EU administrative agencies. ACER BoA acts on basis legal framework dedicated Agency, while rules conduct before are regulated by internal procedure. These regulations practically only regulating procedure BoA, as has not adopted a single ad-ministrat...

Norway maple (Acer platanoides) and pedunculate oak (Quercus robur) demonstrate different patterns of genetic variation within among populations on the eastern border distribution ranges | Artur Akhmetov, Ruslan Ianbaev, Svetlana Boronnikova, Yulai Yanbaev, Aygul Gabitova, Aleksey Kulagin Agricultural Journals