Who called the ecosystem as biogeocoenosis ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Terms**: The question asks about the term "biogeocoenosis" and its relation to the ecosystem. It is important to note that "biogeocoenosis" refers to the interrelationship between living (biotic) and non-living (abiotic) components in an ecosystem.

2. **Origin of the Term Ecosystem**: The term "ecosystem" was coined by Arthur Tansley in 1935. He introduced this term to describe the complex interactions and relationships between organisms and their environment.

3. **Connection to Biogeocoenosis**: While Tansley introduced the term ecosystem, the term "biogeocoenosis" was used by another ecologist, Sachev, in 1944. Biogeocoenosis emphasizes the interconnectedness of living and non-living components within a specific area.

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