Paint containing organotin compounds such as tributyltin and triphenyltin is applied to ships.

Paint containing organotin compounds such as tributyltin and triphenyltin is applied to ships.

Paint containing tributyltin, triphenyltin and other organotin compounds is applied to the surface of ships and marine structures to effectively prevent marine life from attaching to them.

Organic tin compounds such as tributyltin and triphenyltin have been used to paint the surfaces of ships and marine structures, effectively preventing the growth of marine organisms, but recent studies have found that the organic tin in the paint can be released into the sea and can be toxic to a variety of organisms. Some of the studies on this pollutant are as follows. Please answer: (1) What are the changes in the reproductive function of mollusk females that can inhibit estrogen synthesis at lower concentrations of organotin?

. What are the changes in cellular and humoral immune functions in mice whose thymus gland atrophies after consuming food containing higher doses of tributyltin?

. This contaminant may be harmful to fish, birds and even humans through enrichment by . (2) Organotin pollution causes a change in the age composition of a fish in a sea area (figure below), predict the trend in the population size of this population.

(3) After organotin pollution of a sea area, the biomass of some seaweeds and many mollusks decreased significantly, and individual species died out, while polychaetes such as sandworms became the dominant taxa. This is the result of the study at the  level. (4) The above information shows that if the organic tin is polluted for a long time will lead to a decrease in  and thus reduce the ecosystem __.

Answers.

(1)Decrease in reproductive function Loss of cellular immunity as well as some humoral immunity Food chain

(2) Change from growth to decline and population decline

(3)community

(4) Biodiversity Resistance stability