The Phosphorus cycle has been studied a lot by ecologists because like I said, Phosphorus is an important nutrient and it's not so abundant.

生态学家对磷循环进行了大量研究，因为如我所说，磷是一种重要而不充足的营养物质。

youdao

You said that the nitrogen cycle is also an important nutrient cycle.

你说了，氮循环也是一个重要的营养循环。

youdao

For example, an invading nonnative plant could alter the quantity of leaf litter production, which would alter nutrient contributions to the soil.

例如，外来植物的入侵可能会改变落叶的数量，从而改变对土壤的营养贡献。

youdao

In the ancient oceans, green rust's ability to pull nickel out of the water would have been critical for some life forms, since nickel is an important nutrient for microbes that produce methane.

MSN: What green rust did long ago to the big blue ocean

Farmers in this new economy play an important role as nutrient stewards.

FORBES: How a Nutrient Economy Can Save Our Farmers, Our Health and Our Environment

By looking at which creatures flourish in their mesocosms, Ulf Riebesell of the Leibniz Institute for Marine Studies in Kiel and his colleagues hope to see changes as they take place by keeping an eye on the water chemistry and nutrient levels.

ECONOMIST: Ocean acidification