Предмет: Биология, автор: luchkinslava

Определите площадь, которая нужна для пропитания волка массой 60 кг (30% сухого вещества) в цепи питания: растительность-сурок-волк. Производительность биогеоценоза - 1000 г/м2

Ответы

Автор ответа: aynosson
2

Ответ:

Дано:

m=60 кг (из них 30%-сухого вещества)

Биопродуктивность:

1 м2 фитопланктона= 500 г или 0,5 кг

Цепь питания:

фитопланктон→рыба→дельфин

Найти: S(акватории моря)-? м2

Решение:

Тип данной задачи-на правило экологической пирамиды.

1) определяем массу органического вещества в теле дельфина-белобочки:

60 кг-100%

х кг-30%

х=(60*30)/100

х=18 (кг)

2) исходя из правила экологической пирамиды, определяем массу фитопланктона, необходимую для существования дельфина, массой 60 кг.

фитопланктон→рыба→дельфин

1800 кг 180 кг 18 кг

3) Определяем площадь акватории моря, которая необходима, чтобы прокормить дельфина, массой 60 кг.

1м2-0,5 кг

х м2-1800 кг

х=1800/0,5

х=3600 (м2)

Ответ: площадь акватории моря составляет 3600 м2.

Объяснение:

Похожие вопросы
Предмет: Английский язык, автор: Аноним
1. Underline the correct verb: 1. They was/were in the Natural History Museum yesterday. 2. Nick was/were taken to the hospital early in the morning yesterday. 3. My parents was/were very tired after their trip to Newcastle. 4. Helen was/were on a ferry boat going to Sweden yesterday. 5. The article in the local newspaper was/were very interesting. 6. Those houses was/were built two hundred years ago. 7. Last winter was/were the coldest winter in our region. 8. Tom was/were absent-minded because he had left the keys at school. 9. I was/were on a long trip to the USA two years ago. 10. Your e-mail address was/were very difficult to remember. 11. My brother’s letters was/were rather long and interesting. 12. Pamela was/were an excellent ski jumper three years ago.

2. Fill in was or were: 1. Who _____ the best football player in Great Britain last year? 2. They _____ very happy after their trip to London last month. 3. Andrew _____ the best student in our class last year. 4. The film _____ not interesting and I switched off the TV. 5. The mathematics test _____ very difficult and we _____ disappointed. 6. The boys _____ very noisy at the lesson yesterday. 7. Who _____ the best sportsman in your class last month? 8. Martha _____ in Cambridge with her parents two years ago. 9. The girls _____ in the disco club two weeks ago. 10. I _____ responsible for the classroom flowers last year. 11. There _____ many flowers in the flowerbeds around the school. 12. Five birds _____ sitting on the branches of the tree near the house.
3. Rewrite the sentences using was or were: 1. I am happy to see you. 7. Nora is on holidays in Italy. ……………………………………………………….. ……………………………………………………………… 2. This is my favourite book. 8. The dogs are under the table. ………………………………………………………... …………………………………………………………….. 3. Mary is not at school. 9. My mobile is broken. ………………………………………………………….. ………………………………………………………………. 4. It is a very interesting film. 10. They are good students. ………………………………………………………….. ………………………………………………………………. 5. We are good sportsmen. 11. This dog is very friendly. …………………………………………………………… ……………………………………………………………… 6. Tom is my best friend. 12. I am at the shopping centre. ………………………………………………………….. ……………………………………………………………..
дам 20 баллов
Предмет: Математика, автор: Алина111илпм