CFP Geographic Information Systems 3

Question 1

A fisheries manager is combining a benthic substrate layer with a water depth layer to identify spawning habitat. What GIS operation is being used?

Accepted Answer

Map overlay (intersect/union)

Answer

Map overlay operations like Intersect or Union combine multiple spatial layers to produce composite habitat classifications based on multiple attributes.

Question 2

What does NDVI (Normalized Difference Vegetation Index) derived from satellite imagery indicate in riparian buffer assessments?

Accepted Answer

Vegetation greenness and density

Answer

NDVI uses near-infrared and red bands to quantify vegetation density and health, useful for assessing riparian buffer condition.

Question 3

Which GIS approach is used to determine fish passage barriers by identifying stream reaches where gradient exceeds a threshold value?

Accepted Answer

Longitudinal profile analysis with attribute queries

Answer

Longitudinal profile analysis extracts stream gradient from DEMs and attribute queries flag reaches exceeding barrier thresholds for fish passage.

Question 4

In GIS telemetry studies, what statistical spatial method is most commonly used to estimate a fish's home range?

Accepted Answer

Kernel Density Estimation (KDE)

Answer

Kernel Density Estimation is the standard method for estimating home range utilization distributions from GPS or acoustic telemetry point data.

Question 5

A fisheries GIS dataset uses WGS84 as its datum. What does this primarily define?

Accepted Answer

The reference ellipsoid and origin for coordinate measurements

Answer

WGS84 (World Geodetic System 1984) defines the reference ellipsoid, origin, and orientation used to describe positions on the Earth's surface.

(CFP) Certified Fisheries Professional Practice Test

(CFP) Certified Fisheries Professional Practice Test

CFP Geographic Information Systems 3