Results 181 to 190 of about 18,562 (221)
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Maximum growing depth of submerged macrophytes in European lakes
Hydrobiologia, 2012Submerged macrophytes are important elements for the structure and functioning of lake ecosystems. In this study, we used chemical and maximum colonisation depth (C_max) data from 12 European countries in order to investigate how suitable C_max may describe the impact by eutrophication.
Søndergaard +9 more
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Allelopathic inhibition of epiphytes by submerged macrophytes
Aquatic Botany, 2006The hypothesis that epiphytes are more vulnerable to allelochemicals released by submerged macrophytes than phytoplankton was tested by measuring growth and photosystem (PS) II activity of three common epiphytic algae and cyanobacteria in coexistence with Myriophyllum spicatum using dialysis tubes.
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Radiative Transfer in Submerged Macrophyte Canopies
2001Abstract : The goals of this study are to develop models of radiative transfer for optically shallow waters with benthic substrates colonized by submerged aquatic vegetation (SAV). The models will enable prediction of upward spectral radiation from the seafloor, thereby permitting (i) the use of optical remote sensing to retrieve bathymetry, (ii) the ...
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Weight-density relationships in submerged macrophytes
Oecologia, 1987Crowded stands of submerged plants in Québec lakes have a weight-density with a shallower, but not significantly different, slope and an intercept 10 fold lower than those for terrestial stands. The examination of a larger data set including both freshwater and submerged macrophytes supported these differences.
C M, Duarte, J, Kalff
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Morphological responses of a submerged macrophyte to epiphyton
Aquatic Ecology, 2009Epiphyton might have distinctive influence on the morphology of substrate macrophyte. In this article, we evaluate the influence of epiphyton on the morphological characteristics of their substrate submerged macrophyte, Potamogeton perfoliatus under two light intensities.
Munira Sultana +3 more
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Effects of Motor Boats on Submerged Aquatic Macrophytes
Lake and Reservoir Management, 1997ABSTRACT Excluding motor boats from small experimental plots in a lake with heavy boat traffic significantly increased macrophyte biomass, coverage, and shoot height compared to impacted areas. Lakes across the country are increasingly threatened by overuse, particularly involving more and larger motor boats.
Timothy R. Asplund, Chad M. Cook
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Distribution and biomass of submerged macrophytes in Neusiedlersee
Aquatic Botany, 1976Abstract Within the area of the open, reed-free zone in Neusiedlersee there exists a clearly defined region with Myriophyllum spicatum L. and Potamogeton pectinatus L. Phytosociological estimates, quadrat counts and direct harvest methods have been combined over a 3-year period in order to estimate the extent, density and production ...
Fritz Schiemer, Mike Prosser
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Photosynthetic characteristics of the submerged macrophyte Ceratophyllum demersum
Physiologia Plantarum, 1986The photosynthetic and growth characteristics of Ceratophyllum demersum L. were investigated under laboratory conditions which simulated those encountered in the plants' normal environment. The carbon fixation rate of C. demersum measured with 14C at light and carbon saturation at pH 8.0 was 4.48 mg C (g ash‐free dry weight)−1 h−1. It was lower at pH 6.
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Submerged macrophytes height estimation by echosounder data sample
2012 IEEE International Geoscience and Remote Sensing Symposium, 2012Traditional methods of submerged aquatic vegetation (SAV) survey last long and then, they are high cost. Optical remote sensing is an alternative, but it has some limitations in the aquatic environment. The use of echosounder techniques is efficient to detect submerged targets.
Luiz Henrique da Silva Rotta +1 more
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[Effects of sediments on submerged macrophytes growth].
Ying yong sheng tai xue bao = The journal of applied ecology, 2007With mesocom experiment, this paper studied the effects of different sediments (sandstone, clay and mud) in Taihu Lake of China on the growth of four submerged macrophytes Vallisneria natans, Potamogeton malaianus, Hydrilla verticillata, and Ceratophyllum demersum. The results showed that among the test sediments, mud was more available.
Kaining, Chen +5 more
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