Assumptions of quadratic sampling
The quadrat sampling method has the following assumptions,
- The number of individuals in each quadrat is counted.
- The size of the quadrats is known.
- The quadrat samples are representative of the study area as a whole.
Advantages of quadrat sampling
Some advantages are given below-
- It sampling is easy to use, inexpensive.
- It is suitable for studying plants, slow-moving animals and faster-moving animals with a small range.
- It requires the researcher to perform the work in the field and, without care.
- It measures abundance and needed cheap equipment.
Disadvantages of quadrat sampling
Some disadvantages are given below-
Quadrat sampling is not useful for studying very fast-moving animals which are not stay within the quadrat boundaries.
- There exists biasness in favor of slow moving taxa.
- Collect only taxa that are present in the sampling time and not buried too deeper in sediment.
- It is a low estimate of taxonomic richness and assemblage composition.
- It is also a low detectability of among-site differences in assemblage composition.
- Some animals may experience harm if the scientist collects the population within the quadrat rather than studying it in the field.
Applications of Quadrat Sampling
Some important applications are given below-
- Quadrat sampling is broadly used in plant studies.
- It is applied in ecology especially in biodiversity.
- It is used to find the taxonomic richness of slow-moving taxa in a certain area.
- It is the best measure of finding taxonomic richness in costal area.
- It can be also used to evaluate the impact of weathering, trampling or erosion in an ecosystem or at a cliff or rock face.