Blog Post 4 : Sampling strategies

Quadrat, pitfalls, and line transect sampling strategies were used in the collecting various plant and animal species in the region. The three sampling techniques are good especially in an ecological study research where one cannot count all the animal or plant species in a habitat. However, the time, accuracy, and consistency of the sampling strategies vary due to other factors as discussed below.

Quadrat Sampling Strategy

The research used 7 quadrats to sample plant species and determine the population in the habitat. Frequency was used to calculate the population of each species in the habitat. Grass, trees, moss, insects, and mammal were the major animal and plant species in the 7 quadrants. The results were as follows;

Grass appeared in 6 of the quadrants and therefore, through the frequency technique the grass populations was

Population= (units of sampling where the species occur/total sampling units)*100

Grass species population= 6/7*100=85.71%

Tree species occurred in 5 quadrants, and therefore, the population was

Tree species population=5/7*100=71.4%

Moss plant species occurred in 2 quadrants, and therefore, the population was

Moss species population= 2/7*100=28.57%

The insect species occurred in 4 quadrants making a total population of 51.14% while the mammal species had no occurrence.

The Pitfalls Technique

The pitfall method was used to target the crawling animals. The results from the pitfalls were as follows

Mammal species had a population of 58.78%, and insects had 44.14%. There were no plant species obtained by the pitfall sampling strategy.

Line transect sampling

The sampling method was aimed to collect samples for both the animal and plant species in the habitat. The study marked an area approximately 200 square meters, and then random grids were thrown inside the marked area. A computer generated random number table was used to select which squares to sample. The results were as follows per each species

Mammals= 87.09%

Grass=94.08%

Trees=69.0%

Insects=58.34%

Moss=56%

The quadrat technique had the shortest sampling time because 1 square meter quadrants were randomly random thrown in the particular area. Pitfall had the longest sampling time as crawling animals had to be waited to fall into the pits. Line transect had average time although a line had to be used to mark the sampling field.

 

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