Nutrients are never lost from the ecosystems . Write about (a) Gaseous cycle (b) Sedimentary cycle.

Explanation

### Step-by-Step Solution

**Introduction to Nutrient Cycling:**
Nutrients are essential for the survival of organisms and are never lost from ecosystems; instead, they are recycled continuously through various processes. This recycling occurs through two main types of cycles: the gaseous cycle and the sedimentary cycle.

**(a) Gaseous Cycle:**
1. **Definition:** The gaseous cycle refers to the movement of nutrients that are primarily found in the atmosphere or hydrosphere.
2. **Main Reservoir:** The main reservoirs for gaseous cycles are the atmosphere (air) and hydrosphere (water bodies).
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