Question

Сколько потребуется фитопланктона, чтобы вырос 2-килограммовый окунь. фитопланктон — зоопланктон — уклейка — налим — окунь

Answer 1

предположим, что  представители каждого следующего уровня питаются ТОЛЬКО организмами предыдущего уровня. Обычно усваивается ≈10% массы )

Окунь массой 2 кг  съест налима массой 20 кг (

 налим( 20кг)== 200 кг уклейки

уклеки 200 кг надо съесть 2000 зоопланктона, 

2000 кг зоопланктона==надо потребить 20 000 фитопланктона. 

ОТВЕТ потребуется  20 000 кг фитопланктона, чтобы вырос окунь массой 2 кг 

Answer 2

Calculating the Amount of Phytoplankton Needed to Grow a 2-Kilogram Perch

To calculate the amount of phytoplankton needed to grow a 2-kilogram perch, we need to consider the trophic levels in the food chain from phytoplankton to perch.

Phytoplankton is a primary producer in the aquatic food chain, providing energy to the next trophic levels.

Zooplankton consumes phytoplankton and serves as a primary food source for small fish like minnows.

Minnows are then consumed by larger fish such as perch.

Phytoplankton to Perch Conversion

The conversion of phytoplankton to perch involves multiple trophic levels, each requiring energy from the previous level. While it's challenging to provide an exact amount of phytoplankton needed to grow a 2-kilogram perch without specific data, we can discuss the general principles involved.

The conversion of energy between trophic levels is typically around 10%, known as the 10% rule. This means that only about 10% of the energy from one trophic level is passed on to the next. Therefore, a large amount of phytoplankton would be required to sustain the energy needs of the entire food chain leading to the growth of a 2-kilogram perch.

Conclusion

In conclusion, the exact amount of phytoplankton needed to grow a 2-kilogram perch would depend on various factors such as the specific species of phytoplankton, environmental conditions, and the efficiency of energy transfer between trophic levels. While it's challenging to provide an exact quantity without specific data, it's clear that a significant amount of phytoplankton would be required to support the growth of a 2-kilogram perch.