Results 111 to 120 of about 2,221,299 (300)
Snow tussocks, chaos, and the evolution of mast seeding [PDF]
, 2002 One hitherto intractable problem in studying mast seeding (synchronous intermittent heavy flowering by a population of perennial plants) is determining the relative roles of weather, plant reserves, and evolutionary selective pressures such as predator ...
Bjørnstad, O.N., Kelly, D., Rees, M.
core +1 more source
International Forum of Allergy &Rhinology, EarlyView.ABSTRACT Background Identifying predictive and monitoring biomarkers for allergen immunotherapy response is crucial for enhancing clinical efficacy. This study aims to investigate the systemic and local levels of immunoglobulins and identify potential biomarkers in house dust mite (HDM) allergic rhinitis (AR) patients who are undergoing subcutaneous ...
Xu Xu +6 more
wiley +1 more source
Steppes, savannahs, forests and phytodiversity reservoirs during the Pleistocene in the Iberian Peninsula [PDF]
, 2010 A palaeobotanical analysis of the Pleistocene floras and vegetation in the Iberian Peninsula shows the existence of patched landscapes with Pinus woodlands, deciduous and mixed forests, parklands (savannah-like), shrublands, steppes and grasslands ...
Agustí +259 more
core +3 more sources
Applications in Plant Sciences, EarlyView.Abstract Premise Genebanks must maintain viable seeds for decades. Seeds that germinate are clearly alive, but some seeds, often from wild populations, do not germinate because they are dormant, empty, aged, or damaged (D.E.A.D.). This work evaluates the effects of D.E.A.D.
Christina Walters +33 more
wiley +1 more source
Applications in Plant Sciences, EarlyView.Abstract Premise The censer seed dispersal mechanism, whereby mature fruits are retained on plants and seeds dispersed by mechanical shaking, is among the most specialized wind‐aided seed dispersal strategies employed by the flowering plants. An efficient, affordable, and easily repeatable protocol for determining whether a species uses this unusual ...
Abigail J. Motter +2 more
wiley +1 more source
Seed production, infestation, and viability in Acacia tortilis (synonym: Vachellia tortilis) and Acacia robusta (synonym: Vachellia robusta) across the Serengeti rainfall gradient [PDF]
, 2017 Tree recruitment in savannas proceeds in multiple stages characterized by successive filters occurring at the seed and seedling stages. The “demographic bottleneck” hypothesis suggests that such filters ultimately restrict tree density and prevent trees ...
Anderson, T. Michael +3 more
core +1 more source
Flora - Morphology, Distribution, Functional Ecology of Plants, 2008 Abstract Pollen limitation occurs when plants produce less fruits and/or seeds than they would with adequate pollen receipt. If the addition of cross-pollen to stigmas increases fruit/seed production, it is interpreted as an evidence of pollen limitation.
Chacoff, Natacha Paola +2 more
openaire +2 more sources
Animal‐mediated seed dispersal: A review of study methods
Applications in Plant Sciences, EarlyView.Abstract By dispersing seeds, animals provide ecological functions critical for the ecology, evolution, and conservation of plants. We review quantitative and empirical approaches and emerging technologies to quantify processes and patterns of animal‐mediated seed dispersal (zoochory) across its phases: from predispersal to postdispersal.
Noelle G. Beckman +10 more
wiley +1 more source
Quantitative and qualitative consequences of reduced pollen loads in a mixed‐mating plant
Ecology and Evolution, 2019 Greater pollination intensity can enhance maternal plant fitness by increasing seed set and seed quality as a result of more intense pollen competition or enhanced genetic sampling. We tested experimentally these effects by varying the pollen load from a
Laura S. Hildesheim +3 more
doaj +1 more source
Microbiology and atmospheric processes: Biological, physical and chemical characterization of aerosol particles [PDF]
, 2008 The interest in bioaerosols has traditionally been linked to health hazards for humans, animals and plants. However, several components of bioaerosols exhibit physical properties of great significance for cloud processes, such as ice nucleation and cloud
Ahern, H. E. +8 more
core +2 more sources