Crop phenology is essential for evaluating crop production in the food insecure regions of West Africa. The aim of the paper is to study whether satellite observation of plant phenology are consistent with ground knowledge of crop cycles as expressed in agro-simulations. We used phenological variables from a MODIS Land Cover Dynamics (MCD12Q2) product and examined whether they reproduced the sp...

The spatial and temporal distribution of forage quality is among the most central factors affecting herbivore habitat selection. Yet, for high latitude areas, forage quantity has been found to be more important than quality. Studies on large ungulate foraging patterns are faced with methodological challenges in both assessing animal movements at the scale of forage distribution, and in assessin...

The objective of this study was the isolation and identificaion of essential oil constituents of Salvia sahendica. The antimicrobial activity of the essential oil was also investigated. The aerial parts of the plant were collected in different phenological stages in 2004 from Sahand Mountain (East Azerbayjan Province, Tabriz). The essential oil of S. sahendica was isolated by hydro-distillation...

In environments with strong and variable seasonal fluctuations, organisms are selected on the basis of their phenology, such as the timing of diapause, reproduction, or assembling of storage products. A simulation model of the dynamic balance of various phenologies within a population facing density-dependence and varying annual, environmentally determined growth opportunities is presented. The...

In this study, the diversity of thrips (Insecta: Thysanoptera) on two varieties olive trees (Chemlal and Sigoise) in northeast Algeria (Province Batna), was evaluated for 3 years (2019–2021). addition, fluctuations numbers phytophagous were estimated according to phenological stages. A total 19 species are identified (Liothrips oleae) have just been reported first time Algeria. Only 5 females c...

Land surface phenological cycles of vegetation greening and browning are influenced by variability in climatic forcing. Quantitative spatial information on phenological cycles and their variability is important for agricultural applications, wildfire fuel accumulation, land management, land surface modeling, and climate change studies. Most phenology studies have focused on temperature-driven N...

PREMISE OF THE STUDY Climate change has resulted in major changes in the phenology of some species but not others. Long-term field observational records provide the best assessment of these changes, but geographic and taxonomic biases limit their utility. Plant specimens in herbaria have been hypothesized to provide a wealth of additional data for studying phenological responses to climatic cha...

Background: The leaves, roots and seeds of Lovage (Levisticum officinale Koch) being used as an herb, vegetable and spice. Objective: The aim of this study is evaluation of the changes of phytochemical compound in aerial parts of the Lovage plants at different developmental stages as well as antioxidant activity. Methods: The plants were harvested from Hezar Mountain. After drying, essent...

Climate change is altering spring snowmelt patterns in alpine and arctic ecosystems, and these changes may alter plant phenology, growth and reproduction. To predict how alpine plants respond to shifts in snowmelt timing, we need to understand trait plasticity, its effects on growth and reproduction, and the degree to which plants experience a home-site advantage. We tested how the common, long...

This study was conducted to improve the knowledge of molecular processes involved in the interaction between Fusarium graminearum and emmer in the course of grain ripening. Emmer plants were artificially inoculated with a F. graminearum spore suspension at anthesis. In the course of grain ripening from milk ripe to plant death stage, grains at four phenological growth stages were collected for ...