Get Freshwater Microbiology. Biodiversity and Dynamic PDF


By David Sigee

ISBN-10: 0471485284

ISBN-13: 9780471485285

This certain textbook takes a wide examine the swiftly increasing box of freshwater microbiology. focusing on the interactions among viruses, micro organism, algae, fungi and micro-invertebrates, the e-book supplies a large organic allure. along traditional facets equivalent to phytoplankton characterisation, seasonal alterations and nutrient cycles, the name specializes in the dynamic and utilized points that aren't lined in the present textbooks within the box.

  • Complete insurance of all clean water biota from viruses to invertebrates
  • Unique specialize in microbial interactions together with insurance of biofilms, vital groups on all uncovered rivers and lakes.
  • New details on molecular and microscopical strategies together with a research of gene alternate among micro organism within the freshwater setting.
  • Unique emphasis at the utilized features of freshwater microbiology with specific emphasis on biodegradation and the factors and remediation of eutrophication and algal blooms.

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Additional resources for Freshwater Microbiology. Biodiversity and Dynamic Interactions of Miicroorgs in the Aquatic Env

Example text

This diagram includes the five major groups of microorganisms – viruses, fungi, bacteria, protozoa and algae – and again emphasizes the distinction between the main trophic sequence (ingestion) and the microbial loop. Dissolved organic carbon (DOC) plays a key role in linking the productivity of phytoplankton and zooplankton to bacteria, and also linking the pelagic ecosystem to the external environment via exogenous DOC. 11 Simplified scheme (generalized food web) for trophic interactions in the pelagic freshwater environment.

Disturbance also results in less efficient use of primary production, with an increase in unused resources.  Nutrient cycling. Increased nutrient turnover and decreased cycling frequently appear in stressed ecosystems. The decreased nutrient cycling results from changes in community structure HOMEOSTASIS AND ECOSYSTEM STABILITY ENERGETICS - Community respiration increases - P/R becomes unbalanced - R/B ratio increases - Importance of auxiliary energy increases - Unused primary production increases NUTRIENT CYCLING - Nutrient turnover increases - Horizontal transport increases -Vertical cycling of nutrients decreases - Nutrient loss increases reversed.

The use of carbon stable isotope analysis in this situation to detect changes in resource use is possible because phytoplankton discriminate against 13C more than benthic algae (periphyton), and consumers conserve these differences. During the eutrophication process, the 13C content of benthic grazers (amphipods, isopods and snails feeding on benthic algae) changes to that of benthic filter feeders (mussels and chironomids consuming phytoplankton). This transition in the 13C signature of grazers results from a decrease in periphyton availability and an increase in phytoplankton biomass, which settles out on the sediments.

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Freshwater Microbiology. Biodiversity and Dynamic Interactions of Miicroorgs in the Aquatic Env by David Sigee

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