If the birth rate of a population of dolphins is 2.0, the death rate is 0.5, and the population size is 100, what is this dolphin's population growth?

The dolphin's population growth is 150% .

Explanation:

The birth rate of dolphins =

The death rate of the dolphins =  

Dolphin's population growth  = Birth rate - Death rate

=

The dolphin's population growth is 150%.

Energy and chemicals move through ecosystems in different ways. nutrients are constantly recycled  through the ecosystem, while energy moves through an ecosystem in one direction.

Explanation:

Nutrients are recycled by nature through the cycles of nutrients also called biogeochemical cycles.

Biogeochemical cycles are processes that occur in nature to ensure the recycling of chemical elements in the environment. It is these cycles that allow the elements to interact with the environment and with living beings, that is, they ensure that the element flows through the atmosphere, hydrosphere, lithosphere and biosphere.

Biogeochemical cycles, by promoting a cycling of the elements, ensure that they are used and subsequently available again. This is an extremely important factor because some elements are essential for living beings, and their constant use, without replacement, could lead to the extinction of species.

The major biogeochemical cycles found in nature are the water, carbon, oxygen and nitrogen cycles.