3 edition of Metal concentrations and algal microfossil diversity in pre-industrial (pre-1880) sediment of lakes located on the Sudbury Igneous Complex (SIC) in Sudbury, Ontario, Canada found in the catalog.
Metal concentrations and algal microfossil diversity in pre-industrial (pre-1880) sediment of lakes located on the Sudbury Igneous Complex (SIC) in Sudbury, Ontario, Canada
Carolyn E. Hunt
|Statement||by Carolyn E. Hunt.|
|Series||Canadian theses = Thèses canadiennes|
|The Physical Object|
|Pagination||x, 124 l. :|
|Number of Pages||124|
Although it has been commonly believed that non-biological processes control the fate of metals in the environment, it is becoming increasingly apparent that microorganisms have a major impact on metal chemistry. This new book, the first in more than 10 years to examine environmental microbe-metal interactions, summarizes the current understanding of the interaction of microorganisms and. The hypothesis that recent climate warming has significantly increased mercury (Hg) fluxes to Arctic lake sediments through increased algal scavenging of Hg from the water column was recently evaluated by Kirk et al., who examined relationships between sedimentary Hg and “S2” carbon profiles in 14 Arctic and sub-Arctic lakes. S2 carbon has been used as a proxy of algal-derived organic.
Such a property, if present in the algal ancestors of land plants, as is suggested by certain microfossil evidence (Graham et al. ), would have contributed to survival of early terrestrial streptophytes, provided a metabolic foundation for the evolutionary diversification of key plant phenolic pathways, and would have fostered early plant. This paper presents a review of lithological and faunal/ floral data from mud-mound complexes of Early Carboniferous (Mississippian) age in Ireland and their depositional setting (Figs. 1, 2).Although mud mounds occur in every Dinantian stage in Ireland, two main periods of development are evident: Late Tournaisian and Late Viséan (Fig. 3).The former period is characterized almost exclusively.
A new method for obtaining permanent quantitative slides of microfossils involves the use of an evaporation tray in which microfossil suspensions can be sedimented randomly onto cover slips on the tray floor. Slides are made after evaporation. The technique is statistically reliable. oxidation and Fe deposition remain unknown. Here we show that speciﬁc microfossil populations of the Ga Gunﬂint Iron Formation contain Fe-silicate and Fe-carbonate nanocrystal concentrations in cell interiors. Fe minerals are absent in/on all organically preserved cell walls. These features are consistent with in vivo intracellular Fe.
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Metal concentrations were measured in the water, particulates, two size fractions of zooplankton, and in fish in a broad gradient of lakes and were related to ecological, physico-chemical and land.
Because of the much lower trace metal concentrations in the open ocean relative to those in coastal waters, oceanic algal species have evolved the ability to grow at much lower external and intracellular concentrations of Fe, Zn, and Mn (Brand et al., ; Brand, ; Sunda and Huntsman, a,b).In doing so they have been forced to rearrange their metabolic Cited by: A significant correlation between metal concentrations in the environment and in the algae was found for zinc; it was the only metal with a wide variation in concentrations exceeding background levels in the habitat of : E.
Chernova, E. Chernova, V. Shulkin, V. Shulkin. soil bacteria and blue-green algae are studied in a metal polluted soil (Brookes et al., ; Dahlin et al., ). The population size of rhizobia has been found to decrease as a result of metal contamination at the concentrations around European Community limits (DoE.
At each site, metal concentrations were monitored in soft tissues of mussels and in the surrounding waters. The experimental conditions were completely characterized: Lazaret Bay (located between Nice and Marseille, France) is a hot spot for Hg ( ng/L) and Pb ( ng/L) concentrations and is an oligotrophic, stable site; Bages Lagoon Cited by: Heavy Metal Concentrations Mean of concentration five types of heavy metal (Pb, Cd, Cu, Cr and Hg) from Tallo River was shown in Fig.
2 and 3. There were 3 types of heave metal that had a high concentration either on the water or in the sediment, such as Pb, Cu and Cr. Species diversity is usually measured by the Shannon Index (H), species richness, or as the expected number of species in samples rarefied to n individuals E(S n).
These measures of diversity decrease in most of the microfossil records from systems with strong human influence on water clarity, nutrient loads and oxygen concentrations.
Microfossil. Microfossils are morphologically diverse, consisting of small (5μm) coccoids and rods, relatively small spheroids (5–10μm), large spheroids (up to 80μm), lenses (from 10μm up to μm along the major dimension), segmented filaments, and hollow tubular : Earth's Oldest Rocks (Second Edition), Related terms: Archean.
Partitioning of metals between dissolved and particulate forms was very consistent. Dissolved metal concentrations were greater than 90% of total concentrations in all tests, exceeding 95% in 10 of 13 tests. Dissolved‐to‐total metal ratios did not vary significantly with concentration, time, or type of test.
in metal polluted soils. 9 In the expedition to look at other resources, it is important to assess the unexplored unculturable microbial wealth.
It has been estimated that 1g of soil might contain between and species of unknown prokaryotes and likely to be further diversity within each species Bioremediation is based on the idea.
Carolyn Hunt,“Metal Concentrations and Algal Microfossil Diversity in Pre-Industrial (Pre) Sediment of Lakes Located on the Sudbury Igneous Complex (SIC) in Sudbury, Ontario, Canada.” (Thesis successfully defended on June 4, ).
Jan J. Latour,“Human Preferences and Choices and How They May Affect Lake. Heavy metal concentrations within freshwater systems can increase as a result of anthropogenic inputs, which in turn can influence microbial community composition and community function.
In this study, lake sediments collected from two historically heavy metal impacted geographical regions [Poyang Lake, People’s Republic of China (PRC), and sites adjacent to the Muskegon. At these low concentrations, the metal ions listed in Table 1 are at a disadvantage to compete with other ions present in the solutions for the metal binding sites.
Still, we cannot rule out that the residual elements may be chemically bound to soluble organic molecules excreted by the algae, making them not available for passive adsorption. heavy metal especially from water but having their own advantages as well as disadvantages.
In present work we report biosorption of Copper and Nickel by locally available contaminated mixed freshwater algae culture. In present work three algal samples were collected, in which two were from macro/sea weed origin where as another.
Extracellular polymeric substances (EPS) are biopolymers secreted by microorganisms such as bacteria, fungi, and algae that may play a significant role in the speciation, toxicity, and biogeochemic. 1. Introduction. Microfossil assemblages in marine and lacustrine sediments have been extensively employed to reconstruct past environments, especially with the development of transfer functions for quantitative inferences of climatic and hydrochemical parameters (Imbrie and Kipp,Birks et al.,Guiot,Fritz et al.,Gasse et al., ).
You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read.
Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. A literature survey indicates microalgae have developed a wide spectrum of absorption (extracellular) and adsorption (intracellular) mechanisms for coping with heavy metal toxicity.
The potential of prokaryotic and eukaryotic microalgae living cells or their dead cell biomass in comparison to currently available physicochemical processes aimed.
Despite the key role microalgae play in introducing toxicants into aquatic food webs, little is known about the effects of environmental factors on metal accumulation by these primary producers. Environmental factors such as light and nutrients alter growth rates and may consequently influence metal concentrations in microalgae through growth dilution.
There has been a tremendous increase in the number and types of various industries, with all industrial operations generating wastes in one form or the other. Electroplating sector contributes a major part in deteriorating the local environment at a massive scale due to the persistent accumulation of heavy metals in the environment.
Nature of the microbial biodiversity of industrial effluents. The heavy metal concentrations in Rupsha River water were found within the permissible limits except for Fe. The mean Fe concentrations were recorded to be ±, ± and ± mgL-1 at sampling points S1, S2 and S3, respectively. The accumulations of heavy metals in fish and crayfish muscles were found within the permissible.3.
Metal Stress as a Method for Stimulation of Bioproduct Synthesis. Accumulation of metals in microalgae cells consists of two mechanisms: metal adsorption on the cell wall surface containing functional groups (carboxyl, hydroxyl, phosphate, amino, sulfhydryl) and absorption of metals inside cells via metal transport systems [12,19,78].Metals in microalgae cells can cause formation of.2 Method Comparisons for Determining Concentrations of Metals in Water Samples Used in Studies of Fish Migratory Histories samples for metals specified in this report.
Integrated water samples result in metal concentration data that accurately represent concentrations throughout the .