Comparative characteristics of biogeocenoses and agrocenoses (fill in the table)

Compare Category biogeocenosis agrocenosis
Selection direction Natural selection operates, rejecting non-viable individuals and preserving adaptations to environmental conditions, i.e., selection forms a sustainable ecosystem The action of natural selection is weakened by man; artificial selection is mainly carried out in the direction of preserving organisms with maximum productivity
The nutrient cycle All elements consumed by plants, animals, and other organisms are returned to the soil, i.e., the cycle is carried out completely. Part of the nutrient elements is removed from the cycle with the mass of organisms grown and harvested as a crop, i.e., the cycle is not carried out
Species diversity and sustainability They differ, as a rule, in a large species diversity of organisms that are in complex relationships with each other, providing stability The number of species is often limited to one, two; interconnections of organisms cannot provide sustainability.
Ability to self-regulation, self-sustainability and turnover Self-regulating, constantly renewing, capable of directed replacement of one community by another (succession). Managed and controlled by humans through changes in natural factors (irrigation), weed and pest control, varietal change, and increased productivity.
Productivity (amount of biomass generated per unit area) Sushi ecosystem biomass

exceeds the productivity of ecosystems of the oceans by 3 times; The main biomass products are consumed by consumers.

Occupying 10% of the land area, annually produce 2.5 billion tons of agricultural products; are significantly more productive than biogeocenoses
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