ecosystem was proposed by
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ecosystem was proposed by
the term ecosystem was first proposed by
who proposed the term ecosystem
the term ecosystem was proposed by
ten percent law in ecosystem was proposed by
the term ecosystem was introduced by
ecosystem was given by
ecosystem was coined by
who suggested the term ecosystem and when
the term ecosystem was first coined by
creation of new ecosystem
who coined the term ecosystem
who gave the term ecosystem
who discovered the term ecosystem
who introduced firstly the ecosystem word
who first used the word ecosystem
who coined the word ecosystem
who created the ecological systems theory
ecosystem was proposed by, the term ecosystem was first proposed by, who proposed the term ecosystem, the term ecosystem was proposed by, ten percent law in ecosystem was proposed by, the term ecosystem was introduced by, ecosystem was given by, ecosystem was coined by, who suggested the term ecosystem and when, the term ecosystem was first coined by, creation of new ecosystem, who coined the term ecosystem, who gave the term ecosystem, who discovered the term ecosystem, who introduced firstly the ecosystem word, who first used the word ecosystem, who coined the word ecosystem, who created the ecological systems theory