Exam 19: Microbial Ecosystems

What advantage do proteorhodopsin-containing organisms have over other heterotrophic microbes in the open ocean?

Which of the following can function as intracellular signaling molecules?

Which metabolic strategy is MOST common in chemolithotrophic mats?

The emergence of new microbial species because of geographic isolation is called ________ speciation.

Due to such an array of nutrients,microorganisms are often capable of sustaining exponential growth in the environment.

Distinguish an ecotype from a species,and provide an example of an ecotype.

Biomass generation due to heterotrophic organisms is called ________ production.

The number of Roseobacter in the ocean describes

Which of the following an example of a biofilm?

Archaea in pelagic deep-water are almost exclusively

Low return of nutrients in the pelagic zone results in relatively low primary production in the open ocean when compared to freshwater lake systems.

Ecological theory states that for every organism there is at LEAST one ________,and the microenvironment where the organism is MOST successful is called the ________.

Provide a reason for the ecological importance of pelagic Bacteria and Archaea.

Sudden nutrient perturbations in an environment generally ________ the overall prokaryotic diversity.

Gammaproteobacteria can be used for biodegradation of hydrocarbons.

Explain how both biochemical oxygen demand and chemical oxygen demand are measured.

Which aquatic habitat contains a pelagic zone?

Explain why biofilms are a concern in medicine.

What adaptation do organisms have that tolerate high pressures?

A population of metabolically related microorganisms is called a(n)