scholarly journals Effect of calcium addition on phosphorus enrichment capacity of two submerged plants (Potamogeton crispus L. and Ceratophyllum demersum L.)in water bodies

2020 ◽  
Vol 32 (2) ◽  
pp. 406-416
Author(s):  
CHEN Qi ◽  
◽  
WANG Heyun ◽  
Keyword(s):  
Water Bodies ◽  
Ceratophyllum Demersum ◽  
Submerged Plants ◽  
Potamogeton Crispus ◽  
Phosphorus Enrichment ◽  
Calcium Addition ◽  
Potamogeton Crispus L

scholarly journals Impact of riparian trees shade on aquatic plant abundance in conservation islands

2011 ◽  
Vol 70 (2) ◽  
pp. 245-258 ◽  
Author(s):  
Magdi Ali ◽  
Samar Hassan ◽  
Abdel-Samei Shaheen
Keyword(s):  
Aquatic Plant ◽  
Submerged Macrophytes ◽  
Myriophyllum Spicatum ◽  
Ceratophyllum Demersum ◽  
Submerged Plants ◽  
Plant Abundance ◽  
Potamogeton Crispus ◽  
Azolla Filiculoides ◽  
Riparian Trees ◽  
Significant Difference

Impact of riparian trees shade on aquatic plant abundance in conservation islands Temperature, acidity, light conditions, total dissolved salts, conductivity, dissolved oxygen, submerged macrophytes and shade and sun path directions were measured at 23 sites along the River Nile banks with aAcacia nilotica growing at water's edge around the First Cataract Conservation Islands. Ceratophyllum demersum and Potamogeton crispus were common in the shaded and unshaded zones, Myriophyllum spicatum and Vallisneria spiralis were found only in the unshaded zone and Azolla filiculoides only in the shaded zone. Banks of the sites surveyed were oriented to five directions (NW, SE, NE, SW, N). There is a significant difference in both the type and density of submerged plants growing under the shade of riparian trees (Acacia nilotica) as compared to unshaded areas. Water column irradiance is the most influential variable dictating the distribution of submerged plants. The area of the shade provided by riparian trees was affected by environmental and/or plant variables. Environmental variables comprised the daily course of the exposition to sun; and plant variables included the area of the tree crown, the height of the tree and geographical position of the tree in relation to sun exposition. Trees on the west bank of the islands at the SW-NE direction have the highest shading effect. The management of tree vegetationmight control incoming solar radiation affecting submerged macrophytes.

The epiphytic communities of various ecological types of aquatic vegetation of five pastoral ponds

Biologia ◽  
2009 ◽  
Vol 64 (1) ◽  
Author(s):  
Beata Messyasz ◽  
Natalia Kuczyńska-Kippen ◽  
Barbara Nagengast
Keyword(s):  
Phragmites Australis ◽  
Aquatic Vegetation ◽  
Typha Latifolia ◽  
Water Bodies ◽  
Potamogeton Pectinatus ◽  
Ceratophyllum Demersum ◽  
Potamogeton Crispus ◽  
Small Water ◽  
Epiphytic Communities ◽  
Potamogeton Natans

AbstractFive small water bodies located within the agricultural region of Wielkopolska (west Poland) underwent investigation. Periphyton samples were collected from various macrophyte habitats representing rush vegetation (in five water bodies), submerged aquatic plants (in three) and nymphaeids (in one): Palędzie — Ceratophyllum demersum, Potamogeton crispus, Typha latifolia; Batorowo — Phragmites australis; Piotrowo — Potamogeton natans, Ceratophyllum submersum, Typha latifolia; Tarnowo Podgórne — Typha latifolia; Dąbrówka — Zannichellia palustris, Potamogeton pectinatus, Phragmites australis.The main goal of the study was to determine the composition and abundance of the periphytic communities inhabiting various types of rush and water vegetation of five water bodies located within a mid-field landscape area.Diatoms such as Achnanthidium minutissimum, Amphora ovalis, Cocconeis placentula orNavicula cincta revealed significantly higher densities in the zone of elodeids, while green algae prevailed among nymphaeids. As a result of this study it was found that the epiphytic algae were characterised by much lower diversity in respect to a specific water body, though much greater diversity was observed in its relation to the type of substratum. Two types of habitats were distinguished — the first of simple build (helophytes and nympheids) and the second containing the complicated architecture of plant stems (elodeids).

scholarly journals Defense Mechanisms of Two Pioneer Submerged Plants during Their Optimal Performance Period in the Bioaccumulation of Lead: A Comparative Study

2018 ◽  
Vol 15 (12) ◽  
pp. 2844 ◽  
Author(s):  
Dian Li ◽  
Linglei Zhang ◽  
Min Chen ◽  
Xiaojia He ◽  
Jia Li ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Protein Content ◽  
Defense Mechanisms ◽  
Hydrilla Verticillata ◽  
Optimal Performance ◽  
Ceratophyllum Demersum ◽  
Contaminated Water ◽  
Submerged Plants ◽  
Significant Difference ◽  
Mda Content

Ceratophyllum demersum L. and Hydrilla verticillata (L.f.) Royle, two pioneer, submerged plants, effectively remove heavy metals from contaminated water. The present work evaluates the bioaccumulation and defense mechanisms of these plants in the accumulation of lead from contaminated water during their optimal performance period. C. demersum and H. verticillata were investigated after 14 days of exposure to various lead concentrations (5–80 μM). The lead accumulation in both C. demersum and H. verticillata increased with an increasing lead concentration, reaching maximum values of 2462.7 and 1792 mg kg−1 dw, respectively, at 80 μM. The biomass and protein content decreased significantly in C. demersum when exposed to lead. The biomass of H. verticillata exposed to lead had no significant difference from that of the controls, and the protein content increased for the 5–10 μM exposure groups. The malondialdehyde (MDA) content and superoxide dismutase (SOD), peroxidase (POD), and polyphenol oxidase (PPO) activities were much higher in C. demersum, suggesting considerable damage from lipid peroxidation and sensitivity to lead stress. Enzyme inhibition and inactivation were also observed in C. demersum at high lead concentrations (40–80 μM). The excellent growth status, low damage from lipid peroxidation, and high activity of catalase (CAT) and phenylalanine ammonia-lyase (PAL) observed in H. verticillata illustrate its better tolerance under the same lead stress.

Ceratophyllum demersum (coontail).

2021 ◽  
Author(s):  
Hugh Dawson
Keyword(s):  
Sexual Reproduction ◽  
Asexual Reproduction ◽  
Nutrient Availability ◽  
Water Body ◽  
Water Bodies ◽  
Ceratophyllum Demersum ◽  
Aquatic Species

Abstract C. demersum is a cosmopolitan submerged aquatic species that has probably already invaded most of its potential exotic range. It has the advantages of being a perennial surviving well over-winter in deeper water and by growing both by asexual reproduction of broken or complete stems and by sexual reproduction of very many seeds. It has a wide ecological tolerance and grows relatively fast. Disturbance of the water body results in increases in growth through changes in nutrient availability but also in faster dispersal around water bodies allowing greater competition with less vigorous species.

Growth phase-dependent allelopathic effects of cyanobacterial exudates on Potamogeton crispus L. seedlings

Hydrobiologia ◽  
2015 ◽  
Vol 767 (1) ◽  
pp. 137-149 ◽  
Author(s):  
Runbing Xu ◽  
Sabine Hilt ◽  
Ying Pei ◽  
Lijuan Yin ◽  
Xiaolong Wang ◽  
...  
Keyword(s):  
Growth Phase ◽  
Potamogeton Crispus ◽  
Allelopathic Effects ◽  
Potamogeton Crispus L
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