What are 4 characteristics of populations? Explain each

1 Population Size and Density: Total size is generally expressed as the

number of individuals in a population. ...

2 Population dispersion or spatial distribution: ...

3 Age structure

4 Natality (birth rate)

Explanation:

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they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.

your answer is "the 1950's"