HELP!!! Given the environment below, provide a hypothetical bacteria (e.g. respi

Question

HELP!!!

Given the environment below, provide a hypothetical bacteria (e.g. respirer, fermenter, photosynthetic) for both the water and sediment. Your answer should include possible carbon metabolisims (2), energy sources (2) and final electron donors (2).

Water: Anerobic, High organic carbon, High nitrate

Sediment: Anaerobic, Low organic carbon, High sulfur, High hydrogen

Organism 1 (water):

Organism 2 (sediment):

1. Given the environment below, provide a hypothetical bacteria ( water and sediment. Your answer should include possible carbo electron donors (2) (a total 6 points). e.g. respirer, fermenter, photosynthetic) for both the n metabolisms (2), energy sources (2) and final Organism 1 (water): Water Light Aerobic High organic carbon High nitrate ediment Organism 2 (sediment): Anaerobic Low organic carbon High sulfur High hydrogen

Explanation / Answer

organism 1: water with sufficient oxygen level, high organic carbon and nitrate will support the growth of aerobic photosynthetic cyanobacteria.

light energy is used to reduce CO2 to organic carbon using H2O as source of electrons

Organism 2: sediment with anaerobic conditions, low organic carbon and high hydrogen and sulful level will support the growth of chemoheterotrophs like anaerobic glucose fermenting Clostridium and sulfate reducers like Desulfovibrio.

Clostridium ferments glucose from cellulose to ethanol to other organic compounds and Desulfovibrio respire using these organic compounds to reduce sulfate and release hydrogen sulfide.

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