Results 131 to 140 of about 2,084 (178)

Periphyton dynamics and influencing factors.

2005
AbstractBiomass and productivity of periphyton communities vary greatly over short distances and time spans, because constituent taxa can respond rapidly to changes in biotic and abiotic factors through colonization from the surrounding water and through growth.
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Reaction of Lotic Periphyton to Experimental Acidification

Water, Air, and Soil Pollution, 1986
Two hypotheses that could explain increases in the biomass and production of lotic periphytic communities in acidified habitats were tested: 1) a greater bioavailability of P due to its greater release from sediments at low pH, and 2) utilization of S from the H2SO4 addition.
D. Planas, G. Moreau
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Periphyton: Autoradiography of Zinc-65 Adsorption

Science, 1970
The major site of sorption of zinc-65 in natural, matlike periphyton is on the upper surface of the community. There is a diffusion gradient within the community. Expression of results from short-term spiking experiments should thus be presented on an areal rather than gravimetric basis.
F L, Rose, C E, Cushing
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In situ bioremediation of surface waters by periphytons

Bioresource Technology, 2014
Environmentally benign and sustainable biomeasures have become attractive options for the in situ remediation of polluted surface waters. In this paper, we review the current state of reported experiments utilizing naturally occurring periphyton. These are microbial communities consisting of heterotrophic and photoautotrophic microorganisms that are ...
Yonghong, Wu, Lizhong, Xia, Zhiqiang, Yu, Sadaf, Shabbir, Philip G, Kerr   +4 more
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Grazer control of nutrient availability in the periphyton

Oecologia, 1991
Benthic algal assemblages are regulated by both abiotic (e.g., nutrient) and biotic (e.g., grazing) constraint. The objective of this study was to determine how changes in these two factors affected the structure of an algal assemblage in an ephemeral stream.
Paul V, McCormick, R Jan, Stevenson
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Periphyton removal by freshwater micrograzers

1994
In various experiments, the freshwater snail species Lymnaea peregra (Mull.), Physa fontinalis (L.), Valvata piscinalis (Mull.) and Bithynia tentaculata (L.) significantly removed periphyton from glass slides, while the two tested crustacean species, Asellus aquaticus (L.) and Gammarus pulex (L.), did not. B.
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Prediction of periphyton in rivers

2013
Periphyton communities are often the dominant primary producers and an important energy source to higher trophic levels in rivers and streams. Empirical models of periphyton biomass (chlorophyll a) that have high predictive power are generally lacking. The goal of this research was to assess and improve the predictability of periphyton in rivers.
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Primary Productivity of Periphyton

Nature, 1963
THE difficult problem of assaying biomass and rates of colonization by periphyton in fresh and saline waters has been recognized for many years. The most common method used in these investigations has involved the measurement of rates of colonization by periphyton on artificial substrata.
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Periphyton-based pond polyculture.

2005
AbstractA brief history of fish polyculture system and pond polyculture (in particular) as an age-old practice in Asia is provided. A list of suitable fish species for polyculture is also given. The benefits of traditional polyculture can also be enjoyed in periphyton-based aquaculture systems.
M. E. Azim, M. A. Wahab
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Phytosociological associations of algal periphyton

1983
In the search for a method to distinguish ecological units of periphytic algal communities, the phytosociological method was applied. On the basis of numerous samples collected from 49 lakes, it was found that there occur two associations in the lakes of Northern Poland: Oedogonio-Epithemietum litoralae in eutrophic lakes, and Hapalosiphono ...
Ryszard Bohr, Marta Luścińska, Andrzej S. Oleksowicz   +2 more
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