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9. (a) (i) What is meant in ecology by a quantitative survey? A quantitative survey in ecology refers to the systematic and statistical collection of data that quantifies the abundance or presence of species within a defined area - Leaving Cert Biology - Question 9 - 2007
Question 9
9. (a) (i) What is meant in ecology by a quantitative survey? A quantitative survey in ecology refers to the systematic and statistical collection of data that qu... show full transcript
Worked Solution & Example Answer:9. (a) (i) What is meant in ecology by a quantitative survey? A quantitative survey in ecology refers to the systematic and statistical collection of data that quantifies the abundance or presence of species within a defined area - Leaving Cert Biology - Question 9 - 2007
Step 1
What is meant in ecology by a quantitative survey?
Answer
A quantitative survey in ecology refers to the systematic and statistical collection of data that quantifies the abundance or presence of species within a defined area. This type of survey often employs methods that yield measurable and numerical data, such as counts or proportions, allowing for the analysis of population dynamics, distribution patterns, and ecological trends over time.
Step 2
What is a quadrat frame?
Answer
A quadrat frame is a square or rectangular frame used to define a specific area for sampling organisms or measurements in ecological studies. It is typically made from materials like wood or metal and can vary in size depending on the study's focus. The quadrat establishes a standardized area within which scientists can count or assess the presence of certain species, helping to provide a clearer picture of the ecological landscape.
Step 3
How did you use the quadrat frame to carry out the survey?
Answer
To carry out the survey, I placed the quadrat frame at randomly selected locations within the study area to avoid bias. Using the quadrat, I counted the number of individual plants within the frame and noted the species present. This process was repeated several times to ensure accurate data collection.
Step 4
Why did you use a number of quadrats or use the quadrat frame a number of times?
Answer
Using multiple quadrats allowed for a more comprehensive assessment of plant diversity and abundance across varied microhabitats. It reduces the potential for error by accounting for variability in plant distribution, ensuring more reliable and statistically valid results.
Step 5
How did you identify the plants?
Answer
Plants were identified using a combination of field guides and reference materials that provided information on local flora, including key characteristics such as leaf shape, flower color, and growth form. Additionally, I consulted with a botany expert for confirmation of species identification.
Step 6
How did you present your results?
Answer
The results were presented in a clear and organized manner using tables and charts, highlighting the abundance and diversity of species within each quadrat. Graphs were also utilized to visually represent the data trends, making it easier to analyze and interpret the findings clearly.
Step 7
Is the quadrat method suitable for animal populations?
Answer
No, the quadrat method is generally not suitable for animal populations. This is because animals may move too quickly or may not be easily observed within a fixed area, resulting in inaccuracies. In cases where animals are sessile or slow-moving, alternative methods such as trap and release or telemetry tracking may be more effective for quantitative studies.