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Showing 1 to 20 of 22 for “"Artificial Substrates"”.
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Diatom and protozoan community analysis and colonization on artificial substrates in lentic habitats
… communities colonizing polyurethane foam (PF) artificial substrates in lentic habitats. This was the first study to utilize multivariate techniques for comparison of protozoan and diatom communities The following hypotheses were examined in this study: 1. diatom and protozoan species accrual is …
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Can Waters Around Durney Key, Pasco County, Florida, Support Coral Recruitment to Artificial Substrates?
To determine whether an artificial reef installation is feasible, there must be a thorough characterization of the habitat. An understanding of both small-scale and large-scale environmental processes is needed to determine factors that potentially will influence the reef. Large-scale processes …
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Treatment of Rainbow Trout <i>(Oncorhynchus mykiss)</i> Raceway Effluent Using Baffled Sedimentation and Artificial Substrates and Characterization of Nutrient Leaching Rates from Settled Rainbow Trout (Oncorhynchus mykiss) Sludge
… Raceway Effluent Using Baffled Sedimentation and Artificial Substrates. The treatment performance of a 6 m wide by 67 m long by 0.8 m deep, baffled sedimentation basin receiving rainbow trout <i>(Oncorhynchus mykiss)</i> raceway effluent was evaluated with and without the installation of …
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Analysis of the Benthic Macroinvertebrate Community Structure for Assessment of Water Quality of the Des Moines River
… benthic macroinvertebrate community. Procedure. Artificial substrates at five stations collected macroinvertebrates. Community structure was analyzed using species diversity indices. Species diversity (D) and redundancy (R) values were used to calculate standardized distance (S.D.) values. These …
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Patterns of variation in the benthic macroinvertebrate community of the Upper Columbia River, WA
… techniques: benthic sled, benthic drift, and artificial substrates. An analysis of the samples collected by these methods revealed significant discrepancies in the types of organisms caught. Benthic sled and drift methods collected mainly planktonic taxa, primarily small crustaceans. This …
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Analysis of Hydric Pine Flatwood Ephemeral Pool Macroinvertebrate and Crustacean Assemblages Along a Temporal and Spatial Gradient From a Hypothesized Colonial Source
… benthic sweep, 2 Hester-Dendy multiple plate artificial substrates, 2 bottle brush artificial substrates, and 1 funnel trap per site. Bray-Curtis based ordinations and cluster analysis revealed significant dissimilarity between and among macroinvertebrate, chironomid, and crustacean …
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Species Diversity of Benthic Macroinvertebrates in the Des Moines River, Iowa
… benthic macroinvertebrate community. Procedure. Artificial substrates at four stations were used to collect benthic macroinvertebrates. Community structure was analyzed with species divorsity indices. Species diversity (D) and redundancy (R) values were used to calculate standardlzed distance …
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Patterns of microbial community development in isolated aquatic systems
… microinvertebrate taxa. Polyurethane foam (PF) artificial substrates were used as sampling devices in these systems. Distance from another aquatic system was found to have a significant effect colonization in these systems. Exclusion of macroscopic organisms, however, did not strongly affect the …
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Local effects of culverts on habitat features and fish assemblages in Blue Ridge streams
… stream sites: five sites contained culverts with artificial bottom substrates and five sites contained culverts with natural bottom substrates. On each stream, paired sampling reaches (reach length ~35 times mean reach width, drainage area <11 km 2) were established 50 m upstream and 50 m …
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Benthic Macroinvertebrate Susceptibility to Trout Farm Effluents
… were constructed to expose previously colonized artificial substrates to the same treatments as the laboratory tests. Flat-headed mayflies were also collected from a nearby stream and transported to the mesocosms for a 10 day exposure. There was no significant difference between treatments in the …
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Protozoan communities, macrophyte vegetation and trophic status of northern Michigan wetland lakes
… of colonization of polyurethane foam unit (PFU) artificial substrates by Protozoa and the trophic status of the wetland lakes. Other evidence of highly eutrophic conditions in the bogs studied were the high ratios of autotrophic to heterotrophic protozoa in the PFU samples, and the general …
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Aufwuchs communities of lotic systems: nontaxonomic structure and function
… by the aufwuchs communities that accumulated on artificial substrates. The carbon-14 method was adapted and refined using a chamber for measurements of primary productivity in lotic systems. Assimilatory (sulfur-35) sulfate reduction was investigated as a method for estimating net microbial …
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Interactions Between APOBEC3 and Murine Retroviruses: Mechanisms of Restriction and Drug Resistance
… protein maintains catalytic activity against artificial substrates. We recovered low levels of G-to-A mutations from natural reverse transcription products, although approximately five to ten fold lower than that thought to be necessary for efficient viral restriction. We show that inhibition …
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COEXISTENCE, RESILIENCE AND RESISTANCE OF MARINE INVERTEBRATE COMMUNITIES ACROSS A LATITUDINAL GRADIENT
… across continental scales and can colonize artificial substrates such as hull of commercial vessels that travel across oceans serving as vectors for marine biological invasions. Among my three aims I was able to: (1) examine how the complementarity of ecological niches varies from the …
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Evaluation of eastern redcedar as a substrate for container-grown plant production
… growing; however, materials used in creation of artificial substrates used to grow ornamental nursery crops continue to increase in price. Eastern Redcedar (Juniperus virginiana L.) is an indigenous plant throughout much of the United States and, in the Great Plains, it has become a pest. Use of …
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Population and community changes of attached-algae to zinc stress alone and in combination with selected environmental variables
… to periphyton (microbial community on solid substrates) was more reliable than total Zn in water for identifying Zn treatments. Zn treatments as low as 0.05 mg Zn•l⁻¹ changed algal species composition. This conflicts with the criterion (0.047 mg Zn•l⁻¹) of the U. S. Environmental Protection …
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PROBING CELLULAR MECHANO-SENSITIVITY USING BIOMEMBRANE-MIMICKING CELL SUBSTRATES OF ADJUSTABLE STIFFNESS
… recognized that mechanical properties of substrates play a pivotal role in the regulation of cellular fate and function. However, the underlying mechanisms of cellular mechanosensing still remain a topic of open debate. Traditionally, advancements in this field have been made using …
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Multispecies toxicity tests using indigenous organisms: predicting the effects of hazardous materials in streams
… 1 was to determine which of the following artificial stream designs would be most logistically simple yet effective in maintaining riffle insects during a 30-d bioassay: 1) static and no current (S-NC); 2) flow-through and no current (FT-NC); 3) static with current (S-C); or 4) flow-through …
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The effects of herbicide treatment on a reservoir ecosystem
… the deeper areas following treatment. Floating artificial substrates were employed to monitor in situ effects of treatment on macroinvertebrates. No toxic effects due to treatment were noted. Weed removal also did not affect growth of bluegill sunfish (Lepomis macrochirus). Tissues of bluegills …
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