Exam 30: Microorganisms in Marine and Freshwater Ecosystems

Among the eukaryotic microbes in the phytoplankton,the ________ are most noted for their contribution to carbon fixation.

The chemolithotrophs that metabolize reduced sulfur compounds using oxygen as a terminal electron acceptor in the Winogradsky column include ______.

The impacts of the microbial types that inhabit cross-sections of water sediment are vast.Consider that sediments deep beneath water surfaces are home to perhaps _____ of the world's bacterial and archaeal biomass.

Cyanobacteria such as Synechococcus and Prochlorococcus are predominate members of the phytoplankton in illuminated surface waters.

Estuaries feature a characteristic salinity profile called a(n)_________ _________ .

The possible effect of failing to limit greenhouse gas emissions on the oceans is likely to be which of the following?

In general,microbial growth in the open ocean is most limited by the availability of ______.

The open ocean is a(n)________ environment.

The initial degradation of cellulose that initiates microbial growth in the Winogradsky column is carried out by ______.

Which of the following keep the lakes of the East Antarctic Ice Sheet in a liquid state?