What forms of interaction between living organisms do you know? list the main characteristics of the population.

What forms of interaction between living organisms do you know? list the main characteristics of the population. which ones are called dynamic and why? How can the state of animal species change with an increase in their population density? can the biocenosis of a wheat field be sustainable? explain your answer. How has the impact of man on nature changed with the development of agriculture and industrial production?

1) There are several forms:

1. Symbiosis. It includes commensalism (one species uses the resources of another, but does not harm it, for example, toads living in the burrow of a marmot), parasitism (one species uses the resources of another, harming it, for example, a bovine tapeworm in the human body) and mutualism ( the presence of each of the two species is mandatory for their existence, for example, bees pollinate plants and feed on pollen and nectar).

2. Predation – one species eats another.

3. Competition – two species have similar needs and are fighting for them.

2) Characteristics: number, density, sex, age and spatial structure, ecological and behavioral structure, mortality, fertility, etc. Dynamic indicators reflect the state of the population over a period of time: mortality and fertility, as well as the rate of population growth.

3) With an increase in population density, competition increases, because shortage of food resources begins. The spread of disease is also increasing.

4) No, this is an artificial ecosystem in which there are few species and an open circulation of substances, it cannot support itself without human intervention.

5) Due to the development of agriculture and industry, a person pollutes the environment with industrial waste, which causes damage to the ecosystem, many species die.