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Chapter 20: Problem 9

Describe and compare submerged aquatic vegetation and phytoplankton. Where and how does each get nutrients and light?

Short Answer

Expert verified
Submerged aquatic vegetation and phytoplankton are both important components of aquatic ecosystems, utilizing sunlight for photosynthesis and obtaining nutrients from their respective environments (sediment for SAV and water for phytoplankton). However, their habitats differ in that SAV is found in shallower waters, while phytoplankton can thrive throughout the water column, primarily near the surface.

Step by step solution

01

Describe Submerged Aquatic Vegetation and Phytoplankton

Submerged aquatic vegetation (SAV) are flowering plants that grow completely underwater. They play crucial roles in aquatic ecosystems by providing habitat and food for aquatic animals and enhance water clarity by reducing wave action. Phytoplankton, on the other hand, are microscopic organisms that live in watery environments, both salty and fresh. They are the base of the marine food chain and are crucial in global nutrient cycling and carbon sequestration.
02

Discuss the Habitat of SAV and Phytoplankton

SAV's can be found in shallower, clear water bodies since they require sunlight for photosynthesis. Phytoplankton live throughout the water column, but are most abundant at light penetration depth, which is typically near the surface of the water.
03

Explain Nutrient Absorption in SAV and Phytoplankton

SAV's absorb nutrients through their root system from the sediment in which they are rooted. Phytoplankton absorb nutrients directly from the water around them, through their cell wall.
04

Describe How SAV and Phytoplankton Get Light

Submerged aquatic vegetation obtains light through the water column. However, since water absorbs light, these plants are typically found in shallower waters where light can penetrate. Phytoplankton, being near the water's surface, have direct access to sunlight, utilizing it for photosynthesis.

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