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2 edition of Entrainment and thermal shock effects on phytoplankton numbers and diversity. found in the catalog.

Entrainment and thermal shock effects on phytoplankton numbers and diversity.

Robert L. Knight

Entrainment and thermal shock effects on phytoplankton numbers and diversity.

by Robert L. Knight

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Published by University ofNorth Carolina in Chapel Hill .
Written in English


Edition Notes

An environmental study program sponsored by the Duke Power Company through a research grant to the Department of Environmental Sciences and Engineering, School of Public Health, University of North Carolina at Chapel Hill.

SeriesESE pub. no.336
ContributionsUniversity of North Carolina at Chapel Hill. Department of Environmental Sciences and Engineering.
ID Numbers
Open LibraryOL13670965M

ABSTRACT: Twenty-one studies on the effects of pH on marine phytoplankton were found and are herein reviewed. Under laboratory conditions, the optimum pH for growth is between pH and Some species can grow well at a wide range of pH, while others have growth rates that vary greatly over a to 1 pH unit change. INTRODUCTION. Marine phytoplankton dominate primary production across ~70% of Earth’s surface (), play a pivotal role in channeling energy and matter up the food chain, and control ocean carbon sequestration ().The diversity of phytoplankton species in open waters has intrigued ecologists for at least half a century (), but the global pattern of this diversity and its underlying drivers have.

  With s to 20, different species in the world's oceans, the diversity of phytoplankton (phyto from the Greek for plant) species is extremely rich. These phytoplankton form a . University of California, Santa Cruz.

Phytoplankton diversity of reservoirs in Parbhani District, Maharashtra, India 1*, In the present investigation an account of occurrence of phytoplankton, their nature, number and seasonal periodicity have been studied to assess the state of the nature of water. The present study was undertaken to observe the seasonal.   By contrast, phytoplankton carrying capacity increased with N supply and in fluctuating rather than constant temperature. Higher phytoplankton N:P ratios under constant temperature showed that temperature regimes affected cellular nutrient incorporation. Minor differences in species diversity and composition existed.


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Entrainment and thermal shock effects on phytoplankton numbers and diversity by Robert L. Knight Download PDF EPUB FB2

Knight RL () Effects of entrainment and thermal shock upon phytoplankton numbers and diversity. ESE publ Department of Environment Science and Engineering, University of North Carolina, Chapel Hill, NC, p 73 Google ScholarCited by: 1.

Knight RL () Effects of entrainment and thermal shock upon phytoplankton numbers and diversity. ESE Publ Chapel Hill NC: Dept Environ Sci Engin, Univ North Carolina: 73 pp. Google Scholar Knoechel R and Kalff J () Track autoradiography: A method for the determination of phytoplankton species productivity.

To evaluate the effects of thermal shock and chlorination on phytoplankton in a coastal power plant cooling system, phytoplankton collected from Yueqing Bay were exposed in the laboratory to. Fig. Latitudinal gradient in the optimum temperature for growth of marine and estuarine phytoplankton strains (n = strains, R 2 =P thermal tolerance function to the regression line (black) is shown, along with 95% confidence bands (gray).Cited by:   The effects shown are the same as in the first sensitivity analysis but to a lesser extent.

Again there is a shift of the primary production to the lower layers. Also, the same effect on the chlorophyll-a concentrations (Fig. 22) as shown in the first sensitivity analysis can be seen.

The heating results in thermal stratification of the water column, which in turn affects the vertical transport of, for example, nutrients. In this paper the implications of the stratification on the biota by focusing on the time of its onset and its variability in time and (vertical) space are evaluated.

Phytoplankton cell size, carbon content and functional structure are investigated by many researchers. Phytoplankton communities can have cell size from a few microns to a few milimeters depending on the groups they belong to. Biovolume measurements are estimated by automatic or semi-automatic Entrainment and thermal shock effects on phytoplankton numbers and diversity.

book. phytoplankton 24 Ma rine phytoplankton 34 Sum mary 36 Chapter 2. Entrainment and distribution in the pelagic38 Introduction 38 Motion in aquatic environments 39 Turbulence 42 Phytoplankton sinking and floating 49 Adaptive and evolutionary mechanisms for regulating w s 53 Sinking and entrainment in natural.

Ke Rao, Xiang Zhang, Xiang-Jun Yi, Zheng-Shan Li, Ping Wang, Guang-Wei Huang, Xiao-Xi Guo, Interactive effects of environmental factors on phytoplankton communities and benthic nutrient interactions in a shallow lake and adjoining rivers in China, Science of The Total Environment, /env, ().

zooplankton abundance, and this effect was summarized as ‘trophic overyielding’ [32]. Filstrup et al. [6] discovered that higher phytoplankton diversity would result in a higher zooplankton resource use efficiency. Hillebrand and Cardinale [36] found that zooplankton effects tended to decrease as the diversity of a prey assemblage increases.

“In the tropical oceans, we are predicting a 40% drop in potential diversity – the number of strains of phytoplankton,” explains Mridul Thomas, a biologist at Michigan State University (MSU) and lead-author of the research paper.

Margalef species richness index (R1), Shannon diversity index (H') and Simpson index (ë) were used to describe temporal changes in diversity and dominance in this investigation. One way Analysis of Variance (ANOVA) was used to determine the significant difference in phytoplankton abundance, diversity indices and environmental factors, between different stations and seasons.

temperature effect on the specific primary productivity and an independent positive effect of phytoplankton species richness on the net and specific primary productivity. I concluded, that there are other factors than temperature (e.g. grazing, nutrient limitation), which might affect phytoplankton diversity and change diversity-productivity.

2. Study area and sampling strategy. The Baie des Veys is an intertidal estuarine ecosystem of the eastern English Channel, located in Normandy, north-western France (Figure 1).With a maximum tidal range of 8 m and a small intertidal area (37 km 2,), this macrotidal estuary is highly ater that enters the southern part of the bay derives from the discharge of four rivers.

The diversity of phytoplankton sustained a maximum of during winter at St. 9, in which the highest numbers of phytoplankton species were observed (49 spp.). On the other hand, the minimum diversity of was found during summer at St.

7, in which the lowest numbers of species were recorded (19 spp.). Phytoplankton: The species are listed according to their abundance in the lake as follows: Dinophytes, Cyanophytes, Baccilariophytes, Chlorophytes, Cryptophytes, Euglenophytes and Crysophytes.

Hollingworth Lake is diverse as it had 49 taxa with more diverse population in August. The lowest diversity was recorded in June. Plume entrainment is not covered by section 31Mb) hut Is part of the thermal discharge effect to be considered in conjunction with thernal effects demonstrations under section 31Ma).

Entrapment-Impingement The physical blocking of larger organisms by a harrier, some type of screen system in the cooling water Intake. an increase in the number of subpolar phytoplankton species moving into the polar region is likely to happen, particularly in FIGURE 1 | Conceptual figure of thermal responses of ectotherms.

(A) Conceptual figure depicting a typical thermal response. When the growth rates are plotted in relation to temperature, the optimum temperature. Phytoplankton are the main primary producers in aquatic ecosystems. Their biomass production and CO2 sequestration equals that of all terrestrial plants taken together.

Phytoplankton productivity is controlled by a number of environmental factors, many of which currently undergo substantial changes due to anthropogenic global climate change.

Most of these factors interact either additively or. The change in water quality tends to change the living conditions especially in the number, diversity and distribution of the biota of the ecosystem (Sharma and Singh, ).

Phytoplankton are the productive base of the food chain in freshwater ecosystems and healthy aquatic ecosystem is dependent on its physical, chemical and biological.

Phytoplankton growth is often limited by the scarcity of iron in the ocean. As a result, many people are discussing plans to fertilize large areas of the ocean with iron to promote phytoplankton blooms that would transfer more carbon from the atmosphere to the deep sea.

Phytoplankton are critical to other ocean biogeochemical cycles, as well.Introduction [1] Phytoplankton form the base of the marine food web and critically mediate the carbon cycle.

The diversity of this set of organisms is important for the ecology and biogeochemistry of the ocean and almost certainly lends stability to the system (Tilman et al. ; Ptacnik et al. ).The question of what maintains the magnitude and patterns of diversity has long been.Diversity indices were computed for algae collected at each station using Shannon's index as described in Pielou (, pg._).

Evenness, or equitability, was computed as E = H/logiQS where H is the diversity index and s is the number of different taxa present.