Last edited by Daim
Tuesday, July 21, 2020 | History

2 edition of Grazer-periphyton interactions in laboratory streams found in the catalog.

Grazer-periphyton interactions in laboratory streams

William T. Sumner

Grazer-periphyton interactions in laboratory streams

by William T. Sumner

  • 144 Want to read
  • 29 Currently reading

Published .
Written in English

    Subjects:
  • Grazing.,
  • Plant communities.

  • Edition Notes

    Statementby William Theodore Sumner.
    The Physical Object
    Pagination[11], 99 leaves, bound :
    Number of Pages99
    ID Numbers
    Open LibraryOL14228869M

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Grazer-periphyton interactions in laboratory streams by William T. Sumner Download PDF EPUB FB2

Graduate Thesis Or Dissertation Grazer-periphyton interactions in laboratory streams Public Deposited. Analytics × Add to Cited by: Temporal patterns of grazer-periphyton interactions in laboratory streams. GRAZER-PERIPHYTON INTERACTIONS dominant taxa in the initial seed were, Zygnema sp. 47%, Klebsormidium rivulare Kiitz.

21%, Oscil-latoria spp. 10%, and Microspora sp. 8%, with the remaining 14% consisting mostly of diatoms (23 species). In order to maintain a diverse species pool, the streams were reseeded once each week during the experiment.

In the model the stream is divided into three zones: free-flowing surface water, a surface storage zone where flow is minimal and where periphyton growth occurs, and a subsu rface zone.

In stream ecosystems, primary production by periphyton plays a key role in determining the structure and function of the stream community. Stream periphyton communities are subject to both bottom-up forces, such as light, nutrients, substrate, flow, season, and disturbance, and top-down control by her.

Grazer–periphyton interactions are shaped, in part, by indirect effects of nutrient regeneration. They are an important model system with which to test predictions of ecological stoichiometry. Sumner WT, McIntire CD () Grazer-periphyton interactions in laboratory streams.

Arch Hydrobiol – Google Scholar Trama FB () Transformation of energy by an aquatic herbivore (Stenonema pulchellum) Ephemeroptera. Ecological stoichiometry has been successful in enhancing our understanding of trophic interactions between consumer and prey species. Consumer and prey dynamics have been shown to depend on the nutrient composition of the prey relative to the nutrient demand of the consumer.

Since most experiments on this topic used a single consumer species, little is known about the validity of. We studied interactions between algal assemblages (grown from algae obtained from four Oregon streams) and herbivorous snails (Juga silicula) in 15 laboratory streams containing either snails/m 2 or no snails.

Biomass, production, export, and taxonomic structure of the algal community were measured at intervals throughout the 75—d study. The negative correlation between periphyton biomass and the logarithm of grazer density in this study, and the association of increased periphyton biomass with reduced grazer densities at DS-I in the Mangatera and Southbrook, also suggest that graz- ing can reduce summer periphyton biomass in New Zealand streams.

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- chemistry. - laboratory manuals. tozoa - laboratory manuals. count. At the end of the experiment, algal biomass in streams illuminated with high irradiance was approximately 80× and 8× greater than in streams with low and intermediate irradiance, respectively.

Growth rates of Juga in streams with high and intermediate irradiances were similar and approximately 15× greater than rates at low by: In the stream stocked with Baetis on day 1, algal biomass remained low until day 9 Timing of grazer-periphyton interactions and then increased rapidly (Fig.

Following the introduction of Baetis on day the rate of biomass accumulation was only slightly less than the mean rate for the unstocked streams.

We studied pre-restoration interactions between hydrology, nutrients, and periphyton in a stream where wastewater effluent and a highly developed urban watershed dominated stream flow. Floods capable of scouring all visible periphyton from the stream were produced from rainfall events as small as cm and created 47 periphyton biomass reset.

CBSE NCERT Books for Class 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 PDF English & हिन्दी में, UP, MP, UPSC के लिए एनसीईआरटी. Consumer–resource interactions may be modified by complex environmental interactions. We experimentally manipulated light, nutrients, consumer density (tailed frog tadpoles − Ascaphus truei), and enclosure sizes in two small and steep streams of coastal British Columbia, used flow‐through, screened enclosures in situ as experimental units and measured the responses of.

We designed a multifactorial experiment to test whether changes in light, nutrients, enclosure size and consumer density influence grazer–periphyton interactions in two small, fishless streams. We selected the tadpole of the tailed frog (Ascaphus truei Stejneger) to study the link between lotic herbivory and primary production for two reasons.

1 Lab Worksheet Hypotheses Activity 1. Sinuosity hypothesis: Using the much thinner book, I think the sinuosity will be curvier than the thicker book. Velocity hypothesis: It will be a greater velocity using the thicker book. Relief hypothesis: The elevation will be higher using the thicker book because it will cause for a higher elevation.

Gradient hypothesis: Activity 2.Lamberti and Moore ). Interactions of herbivores often make it difficult, or impos-sible, to ascribe periphyton grazing responses to particular herbivore species.

Consequently, most previous investigations of grazing effects on stream periphyton communities have fo-cused on a single species either in laboratory. Welcome to the Book Store featuring critically acclaimed books, new releases, recommendations from our editorial team and the best deals in books.

Check back regularly to find your next favourite book. @article{osti_, title = {Laboratory modeling of effects of the interaction of intense electron streams with the neutral atmosphere}, author = {Korolev, Yu.S.

and Novskova, T.A. and Popovich, V.P. and Rogashkov, S.A. and Kharchenko, I.F. and Shustin, E.G.}, abstractNote = {An experimental study is made of the interaction of intense electron streams of medium energy (1 to 10 keV) with a.that if liquid-liquid equilibrium exists, stream 3 will contain the light liquid phase.

To use this example, select a pair of components and specify composition in the feed. Choose the K-value (Thermodynamics > Thermodynamic Settings > Global K-value Model).

Run the simulation and evaluate the results for the liquid streams.Many USGS reports on water resources are now being served online.

Most publications located at this site and other USGS sites can be located by subject, author, date, USGS series or publication series number by using the reports and thematic maps electronic Publications Warehouse. The Publications Warehouse will eventually be taking the place of this page.