نتایج جستجو برای: high aquatic plants
تعداد نتایج: 2244432 فیلتر نتایج به سال:
We evaluated differences in the effects of three low-severity spring prescribed burns and four wildfires on nitrogen (N) biogeochemistry in Rocky Mountain headwater watersheds. We compared paired (burned/unburned) watersheds of four wildfires and three spring prescribed burns for three growing seasons post-fire. To better understand fire effects on the entire watershed ecosystem, we measured N ...
BACKGROUND Shortages in fresh water supplies today affects more than 1 billion people worldwide. Phytoremediation strategies, based on the abilities of aquatic plants to recycle nutrients offer an attractive solution for the bioremediation of water pollution and represents one of the most globally researched issues. The subsequent application of the biomass from the remediation for the producti...
materials and methods from 2004 to 2005, plants were collected from various ecological niches and the roots were used to isolate v. cholera. standard bacteriological, biochemical and serological tests were used for its typification. results in five out of the nine ecological niches explored, we collected either l. minor or e. crassipens, as these specimens cohabited only in two niches. v. chole...
The aquaculture industry has rapidly increased in response to the increasing world population, with appreciation that products are beneficial for human health and nutrition. Globally, organisms mainly divided into two divisions, aquatic animals (finfish, crustaceans, molluscs) plants (microalgae seaweed). Worldwide production reached more than 82 million tonnes (MTs) 2018 450 cultured species. ...
To elucidate effect of chemical reagents addition on growth of aquatic plants in restoration of aquatic ecosystem, Spirodela polyrrhiza (L.) Schleid was used to evaluate its physiological responses to excess iron (Fe(3+)) and copper (Cu(2+)) in the study. Results showed that accumulation of iron and copper both reached maximum at 100 mg L(-1) iron or copper after 24 h short-term stress, but exc...
گیاه Zannichellia L.(Potamogetonaceae) یک جنس جهان وطن است که در اکوسیستم‌های آبی ایران به طور گسترده پراکنش دارد. آخرین بررسی تاکسونومیکی این جنس مربوط به فلورا ایرانیکا در سال 1971 به همراه بعضی تغییرات اخیر صورت گرفته در فلور ایران است. هدف از این پژوهش، بررسی تاکسونومیکی جدید این جنس در ایران براساس مطالعات پراکنش جغرافیایی، ریخت‌شناسی و مطالعات مولکولی (با استفاده از نشانگرهای ITS ، PHYB، ...
A.1 Toxicity to Birds / Reptiles ......................................................................................... 2 A.1.1 Birds: Acute Oral Studies .................................................................................... 2 A.1.2 Birds: Subacute Dietary Studies .......................................................................... 4 A.1.3 Birds: Chronic Studies.............
World’s most troublesome aquatic weed water hyacinth (Eichhornia crassipes) has been studied for its tendency to accumulate the heavy metal contaminants present in water bodies. A thorough chemical investigation has shed light on the fact that it accumulates heavy metals like Lead (Pb), Chromium (Cr), Zinc (Zn) and Manganese (Mn) to a large extent. The presence of higher concentration of these ...
Through natural selection, many plant organs have evolved optimal morphologies at different length scales. However, the biomechanical strategies for different plant species to optimize their organ structures remain unclear. Here, we investigate several species of aquatic macrophytes living in the same natural environment but adopting distinctly different twisting chiral morphologies. To reveal ...
The subfamily of the Lemnoideae belongs to a different order than other monocotyledonous species that have been sequenced and comprises aquatic plants that grow rapidly on the water surface. Here we select Spirodela polyrhiza for whole-genome sequencing. We show that Spirodela has a genome with no signs of recent retrotranspositions but signatures of two ancient whole-genome duplications, possi...
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