نتایج جستجو برای: leaved species

تعداد نتایج: 548786  

2003
Leena Nurminen

The manifold role of aquatic macrophytes in lake ecology is closely linked to their distribution and biomass, which in turn is a synergy of various environmental factors. The implication of different environmental variables on macrophyte speciation and life form structure in lake Hiidenvesi, with an uneven eutrophication history, was studied. The persisting life forms refl ected the somewhat in...

Journal: :Agricultural and Forest Meteorology 2021

While leaf discoloration of many temperate and boreal tree species has been delayed in response to global warming, climatic stress such as severe drought can cause premature discoloration. We investigated whether is synchronized within across under which conditions occurs (i.e. exceptionally early dates the lower 5 % percentile). analyzed 16’865 observations from nine deciduous (beech, silver b...

2000
K. J. Ficken B. Li D. L. Swain G. Eglinton

Lipid analysis of aquatic plants from lakes on Mt. Kenya, E. Africa, revealed that non-emergent (submerged and ̄oating-leaved) species displayed enhanced abundances of mid-chain length, C23 and C25 n-alkanes. In contrast, the emergent aquatic plants had n-alkane distributions similar to those of the terrestrial vegetation, typically dominated by the long-chain length homologues (>C29). A proxy r...

2016
Shuai Shi Zhihui Wu Robert W. Talbot

To evaluate the characteristics of atmospheric particle retention by plant leaves during the tourism season in Buddhism-based scenic areas, plants distributed in the core area of the Mount Wutai scenic area were selected for study: Populus davidiana (Po. davidiana), Rosa hugonis Hemsl. (R. hugonis), Betula platyphylla Suk. (B. platyphylla), Rosa xanthina Lindl. (R. xanthina), Periploca sepium B...

ژورنال: علوم زراعی ایران 2020

In order to quantifying emergence pattern of rapeseed weeds, this experiment was conducted in 40 plots (40 quadrates at Agricultural Sciences and Natural Resources University of Khuzestan, and 30 fields of Bavi (30 quadrates), Ahvaz, Iran, in 2016-2017 growing seasons was monitored, counted and recorded weekly. Three different emergence pattern of nine weed species were identified, Prickly lett...

Journal: :Acta Agriculturae Slovenica 2023

Vine-leaved kitaibelia (Kitaibela vitifolia Willd.), also known as balkanmalva or chalice flower, is a critically endangered plant species with high risk of extinction in the wild. A reason given for this is, among others, low germination rate primarily caused by dormancy. The present study evaluated seed and seedling growth parameters vine-leaved response to eight different pre-sowing treatmen...

Journal: :Trees-structure and Function 2023

Abstract Key message We examined the leaf structure of two basal Cupressus species with a distinct dimorphism. Some foliar features are regarded as ancestral and it is suggested that drought adaptation was one important ecological drivers in evolution genus. Leaf morphology anatomy species, C . nootkatensis vietnamensis , were investigated classical paraffin technique scanning electron microsco...

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