Can cyanobacteria in lakes survive in the ocean

There are many species of cyanobacteria that are suitable for different environments. Cyanobacteria in freshwater are generally not suitable for saltwater. Unless it's a saltwater lake.

There are many species of cyanobacteria. It depends on which category you use!

Most of the plant resources in the ocean are algae, mainly green algae, brown algae and cyanobacteria. （）a.Positive numbers are late and straightforward.

b.Mistakes are missing.

Correct answer: B

Answer analysis: Most of the plants in the ocean are algae, mainly green algae, brown algae, red algae, etc. Cyanobacteria are prokaryotic microorganisms.

Temperature is one of the main factors in cyanobacterial outbreaks. Cyanobacteria are more likely to grow due to eutrophication in the aquaculture waters, so ponds that do not change their water frequently tend to be more prone to cyanobacteria outbreaks.

Organophosphorus is a necessary factor for the growth of cyanobacteria, and the most direct and fundamental way to control cyanobacteria is to remove organophosphorus. Cyanobacteria outbreaks are caused by eutrophication.

Cyanobacteria are the earliest photosynthetically oxygenated organisms, which have played a huge role in changing the earth's surface from an oxygen-free atmospheric environment to an aerobic environment. Many cyanobacteria can directly fix nitrogen in the atmosphere to improve soil fertility and increase crop yields. There are also blue-green algae for people's food, such as the famous hair cabbage and common candida, spirulina, etc.

Water bodies with a lot of organic matter, ponds with more phosphorus and less nitrogen, and places with a lot of domestic sewage are easier for fresh water to grow.

The main reasons why cyanobacteria become the dominant group in water bodies are as follows:

1.Cyanobacteria have carbonic anhydrase, an enzyme that catalyzes the breakdown of CO2 and H2O. In the appropriate pH range (pH, the main form of dissolved inorganic carbon (DIC) in water is HC, and carbonic anhydrase can give cyanobacteria a very high carbon dioxide affinity, allowing them to photosynthesize at a maximum rate close to 100%.

2.Cyanobacteria have a well-developed photooxidation protection system that can produce hydrogen peroxide, which is highly cytotoxic, and thus has a strong ability to survive in the face of stress.

3.Cyanobacteria have a nitrogenase system that can directly absorb and utilize nitrogen gas integrated into the water, so that when nitrogen becomes a limiting factor for algae growth, the growth of other algae is restricted, and cyanobacteria will quickly become the dominant algae.

4.Cyanobacteria have pseudovacuoles, which can regulate the buoyancy of algae in the water column so that they can float up to the upper surface water layer, which is the position of the optimal photosynthetic light intensity, which is conducive to competing for light sources.

5.The abundance of zooplankton such as rotifers and cladoperates in the water column has led to a decrease in beneficial algae, making cyanobacteria the dominant population.

6.With the increase of feeding, a large amount of residual bait and feces at the bottom led to serious blind attack and nutrient in the water body, the ratio of nitrogen and phosphorus was unbalanced, and the blue-green algae broke out in a large area.

7.The lack of microbial populations in the water body and the inefficient decomposition of organic matter in ponds led to the dominant population of cyanobacteria.

About 3.2 billion years ago, single-celled organisms of bacteria and simple algae appeared in the primordial oceans. Cyanobacteria, which are still widely used today, still retain their original prokaryotic state. Cyanobacteria contain chlorophyll in their cells, which can carry out photosynthesis, synthesize proteins, and release oxygen.