At the laboratory, the bottles E1 to E5 were removed from the ice and the initial dissolved oxygen reading was measured using the LabQuest2 Dissolved Oxygen probe. As such, the aquatic organisms which live there are able to live relatively comfortably. Sample water from each site 2. Water quality comprises of physical, biological and chemical parameters that affect the growth and welfare of cultured organisms. Therefore, the nitrate level at all sites would have allowed the tilapia to grow and reproduce efficiently. Climatologists and environmentalists have warned society that the earth is warning for quite some time.
It is important for ecosystems to be stable because stability in ecosystems aid in preventing the ecosystem from being affected in the event of a disturbance and also helps in making the ecosystem resilient to change. Soil Plan an investigation into one of these aspects of soil: a compaction, b soil conditioners, c wind reduction techniques or d cultivation techniques. All the purple colonies on the Coliscan dish were counted. See the syllabus below: Ecology is the branch of biology that deals with the relations of organisms to one another and to their physical surroundings. As such, the more diverse the species in an ecosystem are, the more stable the ecosystem will be. To score highly, students will need to be able to justify the connection between their own study and the bigger problem that was the stimulus for their investigation.
This may endanger the aquatic organisms which level there since a high level of Total Solids causes a decrease in the photosynthetic rate and also reduces water clarity. Note: it was ensured that the person collecting the sample was standing downstream from the sample. Biochemical Oxygen Demand Water Sample 5. From the information presented in the Literature Review, it is noted that the growth rate of tilapia is best between a temperature of 220C and 290C. Furthermore, water samples were collected from each site and water quality tests were done on these samples.
Measurements of productivity may have been taught by the teacher. However, after using the formula to estimate the population of Tilapia in the pond from the first 10 trials, it was found that the total estimated population was 69, 300. A measuring cylinder was used to measure and pour 200 cm3 of sample water from each site into each of the pre-dried and weighed 250mL beakers. For this investigation, the pond was divided into 4 sites. Results, analysis and conclusion 6 This criterion assesses the extent to which the student has collected, recorded, processed and interpreted the data in ways that are relevant to the research question.
Once the concentrations were calculated for each sample, the two values were averaged together to determine the average concentration of bacteria per 100mL. Water with high turbidity is cloudy, whereas water with low turbidity is clear. The phosphate standards and standard curve was already done for us by the University of Trinidad and Tobago and stored on the LabQuest2 interface for use in the determination of our sample readings. Vernier LabQuest 2 interface 2. However, Richard Coe, an employee at the World Agroforestry Centre, indicated that these will not provide a rich comparison of the biodiversity in the area and recommended that a systematic method will provide a much better result. Additionally, the level of Nitrates present would be affected by the level of Alkalinity of the water.
The conclusions drawn must be based on the evidence from the data rather than on assumptions. The dissolved oxygen levels present on the initial day and at the end of the five day period were measured using the Dissolved Oxygen Sensor. The student must also reflect on the outcomes of their investigation in relation to the broader environmental issue, which was raised at the beginning of the internal assessment process. The blank was then placed into the vernier colourimeter and the blank button was clicked on the interfaced. Government officials, organizations, and people who oppose the wind farm will also be discussed or how these people are trying to prevent this wind farm from being constructed. A 10mL graduated cylinder was used to measure and add 2. As a result, the Total Coliform in the pond was high.
Each tilapia was marked by tagging them with a T-bar and they were then released back into the pond, unharmed. Nitrates are acidic in nature whereas phosphates are alkali in nature. However, these acids are greater in wild tilapia than farmed. However, there is a tank culture operation in central Trinidad that utilizes injected oxygen in their system. Chapter 1 Multidisciplinary nature of Environmental Studies 2 Natural Resources 3 Biodiversity 4 Environmental Pollution 5 Nuclear Hazards and Waste management 6 Disaster.
Table 7 shows the effect of alkalinity to surface water. Wash bottle with distilled water 9. A waterproof marker was used to label two sterile sample tubes with the site name, date, and time of collection. Each coastal ecosystem was also divided into three parts and each group was assigned to a particular site to assess. Polluter Pays Principle — Polluters should pay for the damage their pollution causes.
The pH values of the four visited sites were fairly similar with values ranging between 7. From the results obtained, the ammonium concentrations were 0. The mathematical formula below was used to estimate the population size of the tilapia. Demography, Earth, Life 791 Words 3 Pages or operates; the natural world affected by human activity. This region is used mainly as a tourist attraction with attractions such as a beach, a military museum and a national park. The equation below was used to determine the concentration of bacteria per 100 mL for each sample collected. Zonation After a preliminary field visit to a particular ecosystem, investigate the presence or absence of zonation patterns.