نتایج جستجو برای: تیس sorbus aucuparia l

تعداد نتایج: 618541  

2015
Annette Menzel Raimund Helm Christian Zang

Damage by late spring frost is a risk deciduous trees have to cope with in order to optimize the length of their growing season. The timing of spring phenological development plays a crucial role, not only at the species level, but also at the population and individual level, since fresh new leaves are especially vulnerable. For the pronounced late spring frost in May 2011 in Germany, we studie...

Journal: : 2022

Research is related to the biology and ecology of white mistletoe (Víscum álbum L.), with an analysis its impact on dendroflora natural artificial ecosystems. The sequence stages invasive cycle mistletoe, starting from stage infection, intensity invasion (the degree spread in crown), suppression host trees, their death biodegradation, as well mechanism these processes. These have different dura...

Journal: :Forests 2023

Ungulate impacts on forest understory alter tree species composition, with cascading effects functions and resilience against future climate conditions. Indeed, the ungulate browsing pressure seedlings is species-specific causes contrasted growth reductions that recruitment rates. Untangling of from other factors driving regeneration success required to guide management. In particular, Fagus sy...

Journal: :European Journal of Forest Research 2021

Abstract The relative importance of environmental factors and species pool in natural regeneration processes is still intensively disputed. Is filtering especially important for with higher requirements temperature soil fertility? the seed source limitation pronounced among tree lower dispersal abilities? Trees, seedlings saplings measurements were conducted 600 plots 0.05 ha distributed a regu...

Journal: :Siberian journal of life sciences and agriculture 2023

Objective. The study of anthropogenic impact on environmental components, primarily woody and shrub plants, which are the main medium-forming element in natural artificial ecosystems, is relevant. subject this was ecological biological state plants under conditions technogenic stress.
 Materials methods. article presents results a life plants. For this, test plots were laid territory sanit...

2012
Cornelia Chizzali Ludger Beerhues

Biphenyls and dibenzofurans are the phytoalexins of the Pyrinae, a subtribe of the plant family Rosaceae. The Pyrinae correspond to the long-recognized Maloideae. Economically valuable species of the Pyrinae are apples and pears. Biphenyls and dibenzofurans are formed de novo in response to infection by bacterial and fungal pathogens. The inducible defense compounds were also produced in cell s...

2004
Bruno HÉRAULT Guy BOUXIN Daniel THOEN

— Restoration of floodplain forests has become a primary aim of sustainable forestry in Europe. Although several studies have investigated the conversion of coniferous stands outside of their biogeographical area and on unsuitable sites, none focused specifically on alluvial areas. We surveyed 208 riverine stands, distributed homogeneously throughout the Grand-duché de Luxembourg (western-centr...

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