CWD Vegetation Analysis & Plant Identification 2

Question 1

Which plant community indicator is used to assess hydrophytic vegetation when dominant species are facultative (FAC)?

Accepted Answer

Prevalence Index

Answer

The Prevalence Index calculates a weighted average of wetland indicator statuses to determine if the plant community is hydrophytic when dominants are FAC.

Question 2

What wetland indicator status applies to plants that almost always occur in wetlands (>99% of the time)?

Accepted Answer

OBL (Obligate Wetland)

Answer

OBL (Obligate Wetland) species occur in wetlands more than 99% of the time under natural conditions.

Question 3

Which of the following is a morphological adaptation to wetland conditions in herbaceous plants?

Accepted Answer

Aerenchyma tissue in stems and roots

Answer

Aerenchyma is specialized spongy tissue with large air spaces that facilitates oxygen transport to roots in anaerobic saturated soils.

Question 4

Under the 1987 Corps of Engineers Wetland Delineation Manual, what percentage of dominant species must be OBL, FACW, or FAC to satisfy the hydrophytic vegetation criterion?

Accepted Answer

More than 50%

Answer

The Dominance Test requires that more than 50% of the dominant species in each stratum are OBL, FACW, or FAC.

Question 5

Typha latifolia (broadleaf cattail) has which wetland indicator status?

Accepted Answer

OBL

Answer

Typha latifolia is classified as OBL because it occurs almost exclusively in wetland environments.

(CWD) Certified Wetland Delineator Practice Test

(CWD) Certified Wetland Delineator Practice Test

CWD Vegetation Analysis & Plant Identification 2