Here's why:
* Sunlight: The photic zone is the uppermost layer of the ocean where sunlight penetrates. This allows for photosynthesis, the process by which plants and algae use sunlight to create energy.
* Primary Producers: Phytoplankton are microscopic algae that form the base of the marine food web. They are primary producers, meaning they can make their own food through photosynthesis.
* Abundant Resources: The photic zone offers ample sunlight, nutrients, and dissolved gases, creating ideal conditions for phytoplankton to thrive.
While other organisms like fish, zooplankton, and invertebrates also inhabit the photic zone, their populations are ultimately dependent on the abundance of phytoplankton as their food source.
