Предмет: Биология, автор: Яблочко1233

в пищевой цепи как зависит число особей хищника от числа особей жертвы и наоборот

Ответы

Автор ответа: misssX

Хищников всегда меньше, чем жертв:
Всегда количество растительного вещества, служащего основой цепи питания, в несколько раз (около 10 раз) больше, чем общая масса растительноядных животных, а масса каждого последующего звена пищевой цепи, соответственно, пропорционально изменяется....Снижение количества доступной энергии на каждом последующем трофическом уровне сопровождается снижением биомассы и численности особей....
Графически экологическую пирамиду изображают в виде нескольких прямоугольников одинаковой высоты, но разной длины. Длина прямоугольника уменьшается от нижнего к верхнему соответственно уменьшению продуктивности на последующих трофических уровнях. Нижний треугольник самый большой по длине и соответствует первому трофическому уровню - продуцентам, второй - приблизительно в10 раз меньше и соответствует второму трофическому уровню — растительноядным животным, потребителям первого порядка и т.д..................................................................................................................Чем меньше особей жертвы - тем меньше становится и хищников.

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Separation of power in the USA

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1. The lawmaking power of the Congress is checked by the President through its veto power, which in turn maybe overturn by the legislature

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The Prime Minister, the Chief Executive, sits as a member of the Parliament of the United Kingdom, either as a peer in the House of Lords or as an elected member of the House of Commons (by convention, and as a result of the supremacy of the Lower House, the Prime Minister now sits in the House of Commons) and can effectively be removed from office by a simple majority vote.

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