The term "milieu naturel" natural environment refers to any natural setting that ensures favorable conditions for the life of living beings without human intervention

It includes physical, chemical, and biological components interacting to maintain life sustainability

A natural environment is an ecosystem where biotic living and abiotic nonliving components coexist and interact dynamically

It supports life processes by offering food, shelter, reproduction zones, and necessary conditions like water and oxygen

The concept emphasizes autonomy from direct human manipulation, highlighting natural ecological balance

A natural environment is an ecosystem where biotic living and abiotic nonliving components coexist and interact dynamically

It supports life processes by offering food, shelter, reproduction zones, and necessary conditions like water and oxygen

The concept emphasizes autonomy from direct human manipulation, highlighting natural ecological balance

Include all living organisms present in the environment such as plants, animals, insects, fungi, and microorganisms

Example from the pond ecosystem

Physical and chemical elements such as water, soil, temperature, sunlight, oxygen, minerals, and nutrients that shape the environment

For example, water quality and temperature in the pond determine which species can thrive

Living organisms are linked by feeding relationships, where one species serves as food for another

In the pond ecosystem

These interactions maintain population balance and energy flow

Plants like water lilies Nénuphar provide shelter and breeding grounds for fish and insects

Frogs require underwater and land zones to complete their life cycle

Different species may compete for food, space, or mates

Symbiotic relationships, such as between certain aquatic plants and microbes, enhance nutrient cycling

All organisms in a natural environment share basic requirements water, oxygen, nutrients and life processes growth, reproduction, metabolism

Cellular structure is a unifying trait

Each species occupies a distinct ecological niche, a specific role or position in the environment, which minimizes direct competition

For example, fish species may feed at different water depths or on different prey types

Populations fluctuate in size according to resource availability, predation, and environmental factors

The structural unity incorporates adaptability and diversity to sustain ecosystem resilience

The pond ecosystem shown includes a variety of animal species and plants, illustrating biodiversity in a confined natural habitat

Understanding each species’ role helps in conservation efforts and managing water quality

For example, controlling mosquito populations affects predatorprey balances

The pond supports biodiversity, water filtration, carbon storage, and provides food and habitat for many species

Though natural, such ecosystems can be influenced by human activity indirectly pollution, climate change

Understanding natural relationships is crucial for minimizing negative impacts

Identify all components visible flora, fauna, water, soil

Separate into living biotic and nonliving abiotic groups

Ecosystem – a community of organisms and their physical environment interacting as a system

Energy flow sunlight → plants producers → herbivores → carnivores

Nutrient cycling decomposition by microbes returns nutrients to plants

Artificial environments are created or heavily modified by humans urban areas, farms

Natural environments function autonomously, maintaining equilibrium without human management

Natural environments usually harbor greater species diversity and more complex interactions

Artificial environments often simplify ecosystems and may introduce invasive species

Understanding natural environmental components aids restoration of degraded habitats

Artificial environments may simulate natural conditions but lack full ecological functions

Study of natural environments informs biodiversity protection and ecosystem services evaluation

Species identification, life cycles, and behavior analysis occur within natural environments

Physical features like water bodies shape natural habitats

Teaching about natural environments raises awareness of human dependence on ecological balance

Protecting natural environments ensures longterm viability of natural resources for society

Biotic and abiotic parts that together sustain life

Food chains, competition, habitat provision, and symbiosis

Shared basic life requirements, ecological niches, and adaptive mechanisms