Beyond the direct influence of climate change on species distribution and phenology, indirect effects may also arise from perturbations in species interactions. Infectious diseases are strong biotic forces that can precipitate population declines and lead to biodiversity loss. It has been shown in forest ecosystems worldwide that at least 10% of trees are vulnerable to extinction and pathogens ...

In Lithuania, the dieback of European ash (Fraxinus excelsior L.), caused by alien ascomycete Hymenoscyphus fraxineus, started in mid-1990s, resulting a large-scale decline F. and its dominated forest habitats. Nevertheless, recent inventories show presence several hundred hectares naturally regenerated stands. We used seven sites three planted progeny trials to collect leaves, shoots, roots, s...

Features of Spatial Snag Distribution in a Beech-Fir Forest With the participation of about 65% in the total growing stock of conifers, silver fir is the most important andthe best represented conifer species in Croatia. The increasing share of sanitary felling in the annual felling plansdemands that special attention be paid to the health status of fir forests and the quantity of unpla...

dieback of trees is a serious problem in many different regions of the world and city authorities are concern about conserving and maintaining the green spaces in the big cites. this study was conducted to evaluate the early dieback and yellowing of sycamore trees (platanus sp.) by using a completely randomized block design (split split plot) in 15 replications (sites) in 2009. the main plot wa...

Abstract The existence of European ash ( Fraxinus excelsior L.) is threatened by fungus-induced dieback. It essential to find effective methods multiply genotypes resistant dieback while preserving the genetic diversity these tree populations. In this paper efficient method for production seedlings using indirect auxiliary organogenesis with multi-factor analysis its effectiveness presented. Pr...

Abstract The resilience of the Amazon rainforest to climate and land-use change is crucial for biodiversity, regional global carbon cycle. Deforestation change, via increasing dry-season length drought frequency, may already have pushed close a critical threshold dieback. Here, we quantify changes by applying established indicators (for example, measuring lag-1 autocorrelation) remotely sensed ...

Influence of dieback disease on the soil chemistry and morphological, biochemical, molecular characteristics bacteria isolated from rhizosphere mango plants was studied. The samples collected healthy dieback-affected were analyzed for their physicochemical parameters biochemical bacterial isolates. resulted in a significant decrease pH, water holding capacity, organic matter, total nitrogen con...