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In Ecosystems. Organisms tend to get phosphorus from their local ecosystem. An  organism can also get nitrogen from its local ecosystem. Nitrogen  is added to the organism's local ecosyste â¦ m by bacteria from the  air.
In these next sections, we will look at how communities interact with a few other abiotic factors: the essential chemicals water, carbon, nitrogen, and phosphorous. Water is perhaps the most important component of any ecosystem. All living organisms need water to grow and survive. In an ecosystem, water cycles through the atmosphere, soil, rivers, lakes, and oceans. Some water is stored deep in the earth. Surface water, on the other hand, is the source that sustains life on land. In many cases, water also structures the physical habitat of an ecosystem. Polar bears, for example, rely on ocean ice in order to successfully hunt and capture seals.