Question

ОБЪЯСНИТЕ ПОЧЕМУ КРУГОВОРОТ ВЕЩЕСТВ СЧИТАЮТ ГЛАВНЫМ УСЛОВИЕМ СУЩЕСТВОВАНИЯ ПРИРОДНОГО СООБЩЕСТВА

Answer 1

Примером может служить кислород(потому что много круговоротов  разных веществ) Растения из углерода путем фотосинтеза добывает кислород,мы им дышим и выделяется углекислый газ потом растения опять превращают его в кислород(конечно это не обширный ответ на твой вопрос,но надеюсь понятно)если бы одно из этого не было бы то разрывается вся цепочка и от этого может все погибнуть!
Удачи)

Answer 2

The Importance of the Ecosystem for the Existence of Natural Communities

The ecosystem is considered the main condition for the existence of natural communities. The ecosystem refers to the complex network of interactions between living organisms and their physical environment. It encompasses all the living organisms (biotic factors) and the non-living components (abiotic factors) of a particular area.

1. Interdependence of Organisms: One of the key reasons why the ecosystem is considered essential for the existence of natural communities is the interdependence of organisms within it. Organisms within an ecosystem rely on each other for various resources, such as food, shelter, and reproduction. This interdependence creates a delicate balance that allows the ecosystem to function properly.

2. Energy Flow: Another crucial aspect of the ecosystem is the flow of energy. Energy enters the ecosystem through primary producers, such as plants, which convert sunlight into chemical energy through photosynthesis. This energy is then transferred from one organism to another through a series of feeding relationships. This energy flow is vital for the survival and functioning of all organisms within the ecosystem.

3. Nutrient Cycling: The ecosystem also plays a critical role in nutrient cycling. Nutrients, such as carbon, nitrogen, and phosphorus, are essential for the growth and development of organisms. These nutrients are cycled through the ecosystem, moving from the abiotic environment to living organisms and back again. This cycling ensures that nutrients are continuously available for the different organisms within the ecosystem.

4. Habitat and Niche: The ecosystem provides a habitat for organisms, which refers to the specific place where an organism lives. Each organism occupies a particular niche within the ecosystem, which refers to its role and position in the community. The habitat and niche of an organism are closely linked to the abiotic factors present in the ecosystem, such as temperature, humidity, and availability of resources.

5. Biodiversity: The ecosystem supports a wide range of biodiversity, which refers to the variety of different species and ecosystems on Earth. Biodiversity is crucial for the stability and resilience of ecosystems. It ensures that there are multiple species performing different ecological functions, which helps maintain the overall balance and functioning of the ecosystem.

In conclusion, the ecosystem is considered the main condition for the existence of natural communities due to the interdependence of organisms, energy flow, nutrient cycling, provision of habitat and niche, and support of biodiversity. These factors work together to create a balanced and functioning ecosystem that supports the survival and well-being of all organisms within it.