Effects of herbicides on two submersed aquatic macrophytes, Potamogeton pectinatus L. and Myriophyllum sibiricum Komarov, in a prairie wetland

1997 ◽  
Vol 95 (2) ◽  
pp. 259-268 ◽  
Author(s):  
D.J. Forsyth ◽  
P.A. Martin ◽  
G.G. Shaw
Keyword(s):  
Aquatic Macrophytes ◽  
Potamogeton Pectinatus ◽  
Prairie Wetland ◽  
Myriophyllum Sibiricum

Emergence of seedlings of aquatic macrophytes from lake sediments

1983 ◽  
Vol 61 (1) ◽  
pp. 148-156 ◽  
Author(s):  
Richard W. Haag
Keyword(s):  
Lake Sediments ◽  
Initial Treatment ◽  
Aquatic Macrophytes ◽  
Potamogeton Pectinatus ◽  
Sediment Texture ◽  
Substantial Variation ◽  
Initial Exposure ◽  
Sediment Samples ◽  
Thermal Effluent ◽  
Myriophyllum Exalbescens

Sediment samples were collected in May 1980 from 11 stations at five sites in Lake Wabamun. Emergence of seedlings was recorded in a greenhouse at 19 °C for 120 days. The sediments were then chilled at 4 °C for 120 days and reexposed to greenhouse conditions for a further 90 days. Total seedling densities varied from 0 to 2335 m−2. Depth and sediment texture each accounted for 20% of the variance in seedling numbers. Discharge of thermal effluent from the Wabamun generating station also caused substantial variation in seedling number; seedling numbers at the shallowest Wabamun Outlet station were over four times those at any other site. Chilling of the sediment samples in the laboratory caused further emergence of seedlings from the four sites with the highest seedling densities in the initial treatment. Total numbers were up to 50% of those for seedlings that emerged during the initial exposure to greenhouse conditions. Potamogeton pectinatus and P. pusillus were most common among the seedlings of six species. Two of the three most common macrophytes in the lake were rare as seedlings, while no seedlings were recorded for the most common angiosperm, Myriophyllum exalbescens. Reproduction by seed makes a secondary contribution to the dynamics of the vegetation of Lake Wabamun.

Microcosm evaluation of the effects of an eight pharmaceutical mixture to the aquatic macrophytes Lemna gibba and Myriophyllum sibiricum

2004 ◽  
Vol 70 (1) ◽  
pp. 23-40 ◽  
Author(s):  
Richard A. Brain ◽  
David J. Johnson ◽  
Sean M. Richards ◽  
Mark L. Hanson ◽  
Hans Sanderson ◽  
...  
Keyword(s):  
Aquatic Macrophytes ◽  
Lemna Gibba ◽  
Myriophyllum Sibiricum

scholarly journals Biomass allocation to anchoring structures in the aquatic macrophytes from the subcontinental and Atlantic climates in Europe

2011 ◽  
Vol 77 (2) ◽  
pp. 117-123 ◽  
Author(s):  
Józef Szmeja ◽  
Bernard Clement ◽  
Katarzyna Bociąg ◽  
Agnieszka Gałka ◽  
Piotr Skurzyński
Keyword(s):  
Biomass Allocation ◽  
Aquatic Macrophytes ◽  
Temperate Climate ◽  
Potamogeton Pectinatus ◽  
Mechanical Forces ◽  
Littorella Uniflora ◽  
Ground Structures ◽  
Juncus Bulbosus ◽  
A Current ◽  
Nw Poland

Biomass allocation to anchoring structures in 10 species of aquatic macrophytes in two types of the cool and humid temperate climate in Europe, subcontionental (NW Poland) and Atlantic (W France), was examined. The study focused on the weight of anchoring organs in <em>Chara delicatula</em> Ag., <em>Ch. fragilis</em> Desv., <em>Juncus bulbosus</em> L., <em>Littorella uniflora</em> (L.) Asch., <em>Luronium natans</em> (L.) Raf., <em>Potamogeton pectinatus</em> L., <em>P. perfoliatus </em>L., <em>P. natans</em> L. and <em>Ranunculus fluitans</em> (Lam.) Wimm., as well as submerged structures in <em>Hydrocharis morsus-ranae</em> L. The plants were collected from 10 geographically distant lakes and 2 rivers with a current velocity of 0.3-0.5 m s<sup>-1</sup>. It was assumed that biomass allocation to anchoring structures in rooting macrophytes depends on the time that mechanical forces, which can remove the plants from the occupied area, exert their effect. It was found that, in the Atlantic and subcontinental climates, the ratio between the biomass of underground (or submerged) and above-ground structures (U/A index), calculated for the ramets of <em>Chara fragilis</em>, <em>Hydrocharis morsus-ranae</em> and <em>Ranunculus fluitans</em>, has similar values (p&gt;0.05). Nevertheless, among seven species of <em>Cormophyta</em>, which were anchored in the lake or pond littoral, six (<em>Juncus bulbosus</em>, <em>Littorella uniflora</em>, <em>Luronium natans</em>, <em>Potamogeton pectinatus</em>, <em>P. perfoliatus</em> and <em>P. natans</em>) had higher values of the U/A index in the Atlantic climate than in the subcontinental type (p &lt; 0.05). This can be explained by the lack of ice cover and, consequently, a longer time of wave action than in the subcontinental climate.

Accumulation and effects of copper on aquatic macrophytes Potamogeton pectinatus L.: Potential application to environmental monitoring and phytoremediation

2018 ◽  
Vol 155 ◽  
pp. 117-124 ◽  
Author(s):  
Marcela Brandão Costa ◽  
Francesca Valêncio Tavares ◽  
Claudia Bueno Martinez ◽  
Ioni Gonçalves Colares ◽  
Camila de Martinez Gaspar Martins
Keyword(s):  
Environmental Monitoring ◽  
Potential Application ◽  
Aquatic Macrophytes ◽  
Potamogeton Pectinatus

scholarly journals THE EFFECT OF CLIMATIC SHIFTS ON BIODIVERSITY OF PHYTOCENOSIS: LAKE ARAKHLEY (EASTERN SIBERIA, RUSSIA)

2020 ◽  
Author(s):  
G. Ts. Tsybekmitova ◽  
L. D. Radnaeva ◽  
N. A. Tashlykova ◽  
V. G. Shiretorova ◽  
A. K. Tulokhonov ◽  
...  
Keyword(s):  
Organic Matter ◽  
Abiotic Factors ◽  
High Water ◽  
Potamogeton Pectinatus ◽  
Biogenic Elements ◽  
Ceratophyllum Demersum ◽  
Physical Parameters ◽  
Eastern Siberia ◽  
Myriophyllum Sibiricum ◽  
Autochthonous Organic Matter

Lake Arakhley is located within the Lake Baikal basin in Eastern Siberia, Russia. The area is characterized by continental subarctic climate with considerate diurnal temperature range, long cold dry winters and short hot summers with more precipitation occurring during the latter half of the summer. Climatic shifts in high water years and low water years result in morphometric changes in the lake and in the chemical and physical parameters of the ecosystem. During low water years, concentrations of ammonium nitrogen and nitrite nitrogen are decreased, whereas nitrate concentration increases. High water years feature average concentrations of ammonium ions 1.5–2 times higher than the values of recent dry years. Redundancy analysis (RDA) of abiotic factors and biotic community indicated that the community structure shows the greatest correlation with physical and chemical parameters of water and biogenic elements (nitrites, ammonium, phosphates) along the first axis, and with the lake depth and transparency along the second axis. Changes in abiotic factors induce functioning and formation of characteristic communities of the primary producers in the trophic structure of the ecosystem. During low water years, with increased level of autochthonous organic matter, Lindavia comta dominance is observed, while during high water years, with increased allochthonous organic matter Asterionella formosa appeared as dominant. Currently, during low water years, the hydrophytes community is monodominant and composed of Ceratophyllum demersum. Meanwhile, such species indicating eutrophic conditions as Myriophyllum sibiricum, Potamogeton pectinatus are found in the lake vegetation.

Long-term response of periphyton and macrophytes to reduced municipal nutrient loading to the Bow River (Alberta, Canada)

2002 ◽  
Vol 59 (6) ◽  
pp. 987-1001 ◽  
Author(s):  
Al Sosiak
Keyword(s):  
Nutrient Removal ◽  
Aquatic Macrophytes ◽  
Municipal Wastewater ◽  
Nutrient Loading ◽  
Wastewater Treatment Plants ◽  
Phosphorus Loading ◽  
Potamogeton Pectinatus ◽  
Municipal Wastewater Treatment ◽  
Dissolved Phosphorus ◽  
Nitrite Nitrate

The biomass of periphyton and aquatic macrophytes (Potamogeton vaginatus and Potamogeton pectinatus) in the Bow River was sampled over 16 years to assess the response of these plants to improved phosphorus (1982–1983) and nitrogen removal (1987–1990) at Calgary's two municipal wastewater treatment plants. These improvements in treatment reduced total phosphorus loading to the Bow River by 80%, total ammonia loading by 53%, and nitrite + nitrate loading by 50%. No change in periphytic biomass was detected after enhanced phosphorus removal where total dissolved phosphorus (TDP) in river water remained relatively high (10–33 μg·L–1). However, periphytic biomass declined at sites further downstream with TDP < 10 μg·L–1. Regression analysis predicted that nuisance periphyton biomass (>150 mg·m–2) occurred at TDP > 6.4 μg·L–1 (95% confidence interval: 1.9–7.6 μg·L–1). Macrophyte biomass was inversely correlated with discharge and was lower during high-discharge years. Biomass also declined following enhanced nutrient removal, with the greatest decrease following reduced nitrogen discharge. These results provide the first evidence for a response of periphyton and aquatic macrophytes to enhanced nutrient removal from municipal wastewater.

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