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EVS-Lab quadrant study

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Introduction

EVS LAB-3 Vegetation Study By Arjun Sharma 12-A Aim: To investigate & compare the vegetation levels of Different sites. Focused Aim: The aim of the investigation was to study and identify the relationship between the changes in vegetation at different areas by the help of quadrants and transects. Variables- Independent Variable- Number of quadrants and transects to be applied to the vegetation study and Number of sites Dependent Variable- Vegetation Levels of different sites, Types of plants found at various areas. Controlled Variable- Properties of plants, Amount of sunlight the plants receive and Type of plants. Apparatus- * Quadrat * Transects * Scale * Measuring tape (up to 25m long.) * Ziploc bag(For sample collection) Hypothesis- * Relation between vegetation structure and environment will be affected by the size of the quadrat and the length of the transect applied to the vegetation study.[Independent & Dependant Variable] * Smaller quadrat size implemented will affect the vegetation level of the site.[Independent & Dependant variable] * Environmental conditions such as soil, sunlight will affect the composition of the vegetation.[Controlled & Dependant Variable] * The amount of sampling and sites to investigate the vegetation level effects the relation linking with vegetation and environment.[Independent & Dependant Variable] * Properties of plants such as Length, mass will affect the vegetation study in the area.[Controlled & Dependant Variable] Risk assessment- * Areas during the study Require a lot of climbing and few sites maybe crammed with rocks, Boots as a footwear is recommended while studying vegetation levels at various sites. ...read more.

Middle

Terrace 4 * 70% of the quadrant covered was vegetated * 30% of the quadrant covered was dry. Observations made in the Quadrant: * Many Blades of green grass present with an average height of 7 inches. This Covered 50% of the quadrant. * 7 various types of plants observed with an average height of 4 inches. Area 1(Vegetation level in Terrace) Sites Vegetation Level Site 1 20% Site 2 97% Site 3 5% Site 4 70% Average Vegetation in Area 1: 48% Area 2(Forest) Quadrant 1: * 32% of the quadrant covered was vegetated * 65% of the quadrant covered was dry. * 3% of the quadrant covered was bare ground Other observations made- * Part of the quadrant that was dry mainly compromised of dry twigs and leaves. * Few leaves and small plants were detected at Vegetated component of the quadrant. Quadrant 2: * 70% of the quadrant covered was vegetated * 20% of the quadrant covered was dry * 10% of the quadrant covered was bare land. Other observations made: * Component of the quadrant that was vegetated was detected with 8 mine tike plants and various big plants * Many rocks and dried leaves were detected on the component of the quadrant that was vegetated. Quadrant 3: * 15% of the quadrant covered was vegetated. * 85% of the quadrant covered was Dry. Other observations made: * Lot of barren ground and sand was present within the quadrant * Dried leaves and twigs were present within ...read more.

Conclusion

* Although trouble was taken to correctly label samples & record data, the sample station data from 25 metres became contaminated by human error. This meant that no comparison could be drawn from these stations. This could have been avoided if there had been a less pressurised time limit to the field work & tests. * Experiment being carried out once ,may have lead to less accurate results for the vegetation study. * Transect study being carried out on one area rather on two different areas may have distorted results. * Testing vegetation levels only by the means of transects & quadrants, means testing methods were very limited Therefore these steps can be carried out to to improve the experiment and obtain results more specific and accurate: * Larger groups of students may be utilized to keep results as consistent as possible and improve results. * Time can be increased for data collection to collect sufficient data to improve accuracy. * It would also be interesting to see, if experiment could be performed repeatedly at different times of the year and observe if any changes in vegetation levels occur and make comparisons. * Rather than the transect study being more fixed to one area, it can be studied for two areas rather than two sites at one area. By implementing this method comparisons can be made and result for vegetation level may improve. * Besides employing transect & quadrants to study vegetation level, Tests on soil such as pH, moisture content may be conducted to make comparisons with vegetation and soil of the areas. ...read more.

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