CWD Wetland Identification & Classification

Question 1

What is the primary criterion used to identify wetlands?

Accepted Answer

Presence of hydric soils and hydrophytic vegetation

Answer

Wetland identification relies on a three-parameter approach, with the simultaneous presence of hydric soils and hydrophytic vegetation being primary indicators. Hydric soils are formed under saturated conditions, while hydrophytic vegetation consists of plants specifically adapted to thrive in waterlogged environments. These two criteria, along with wetland hydrology, define a wetland.

Question 2

What defines hydric soils in wetlands?

Accepted Answer

Soils that are saturated with water for part of the year

Answer

Hydric soils are defined as soils that are saturated, flooded, or ponded long enough during the growing season to develop anaerobic (oxygen-depleted) conditions in their upper layers. This lack of oxygen leads to distinct chemical and physical properties, such as gleying or redoximorphic features, which are key indicators of wetland environments.

Question 3

Which of the following is a key feature of hydrophytic vegetation?

Accepted Answer

Plants adapted to waterlogged conditions

Answer

Hydrophytic vegetation refers to plant species that have evolved specific morphological, physiological, or reproductive adaptations to survive and thrive in waterlogged conditions. These adaptations allow them to tolerate the anaerobic soil environments characteristic of wetlands, where most upland plants would not survive.

Question 4

How does the U.S. Army Corps of Engineers classify wetlands?

Accepted Answer

By hydrology, vegetation, and substrate

Answer

The U.S. Army Corps of Engineers (USACE) classifies wetlands primarily using the Cowardin Classification System, which categorizes them based on their hydrology, vegetation, and substrate. This comprehensive approach allows for a detailed ecological description and consistent identification of different wetland types across various landscapes.

Question 5

What is a palustrine wetland?

Accepted Answer

A wetland dominated by non-woody vegetation or small trees and shrubs

Answer

Palustrine wetlands are a broad category of non-tidal wetlands that include marshes, swamps, bogs, and fens. They are typically characterized by the dominance of non-woody vegetation (like grasses and sedges) or small trees and shrubs, and are found in inland areas without significant tidal influence.

(CWD) Certified Wetland Delineator Practice Test

(CWD) Certified Wetland Delineator Practice Test

CWD Wetland Identification & Classification