نتایج جستجو برای: ceratophyllum demersum
تعداد نتایج: 189 فیلتر نتایج به سال:
Abstract This study aims to determine some physical and chemical factors their impact on the abundance distribution of submersible aquatic plants for four selected stations in southern marshes, two Eastern Hammar marshes (Al-Burga Al-Sada) Al-Chebiyesh (Abu-Sobat Al-Baghdadia). Water plant samples were collected seasonally during year 2018. The water temperature, electrical conductivity, depth ...
1. Patches of stable substratum in streams may be important refugia for benthic organisms during scouring floods. Streambed stone stability, packing and embeddedness were assessed within and adjacent to beds of the macrophyte Justicia americana in five Alabama streams. 2. The force needed to dislodge stones and embeddedness was about two times lower outside Justicia beds than within them. Signi...
Plastid matK gene sequences for 374 genera representing all angiosperm orders and 12 genera of gymnosperms were analyzed using parsimony (MP) and Bayesian inference (BI) approaches. Traditionally, slowly evolving genomic regions have been preferred for deep-level phylogenetic inference in angiosperms. The matK gene evolves approximately three times faster than the widely used plastid genes rbcL...
2/3 of the reservoir surface area was approximately covered with dense populations of Myriophyllum, Ceratophyllum and Potamogeton species. The headwaters of the reservoir were considered as hard water and had both carbonatic and non-carbonatic hardness. When they were exposed to lentic condition of the reservoir and its intensive photosynthetic activities of macrophyte communities, the bicarbon...
The preservation of water resources in modern urbanized society is a major concern. In this study, floating constructed wetland (FWT) pilot plant was designed and for the treatment polluted wastewater drain. A series experiments were run continuously year pilot-scale FWTs semi-arid area located Egypt’s Delta. Four aquatic species (Eichhornia, Ceratophyllum, Pistia stratiotes, Nymphaea lotus) us...
Background and aims – Epiphytic diatoms are excellent bio-indicators of the present past ecological condition aquatic ecosystems. In order to reconstruct diatom history evaluate its diversity in Democratic Republic Congo, epiphytic were sampled from herbarium specimens plants deposited at National Herbarium Congo Yangambi (YBI) Meise Botanic Garden (BR).Material methods YBI, nine belonging Nymp...
The potential of aquatic plants to accumulate Cs may be notable importance in the environmental monitoring radioactive wastes. This study aimed evaluate accumulation Cs-133 by freshwater macrophytes Bacopa amplexicaulis, Elodea densa, Ceratophyllum submersum, and Limnobium laevigantum after a 10-day incubation period with CsCl (1–1000 μM). partitioning other elements, including 21 metals, such ...
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