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describe the cycling of water and radioactive substances in the ecosystem
Discuss the benefits and applications of determining species importance in ecological students and conservation.
- How can you contribute to the conservation and restoration of the environment?
Describe the characteristic of rainforest and alpine biome? (2 pages long, as a presentation)
Critically review the strategies of a sustainable environment? (3 pages long)
Is it correct to say that a volcanic eruption disrupted the energy flow of an ecosystem because many plants and animals died in a short period of time/ instantly? Ex. plants were covered by ashfall thus wont be able to produce energy and thus dies.
How do volcanic eruptions and earthquakes disrupt biogeochemical cycles?
A survey was conducted to estimate the population of barnacles (figure 1) in two coastal areas (i.e. A and B). The dimension of coastal area ‘A’ is around 20 m and 26 m. The dimension of coastal area ‘B’ is around 14 m and 15 m.
Sampling in both areas was conducted using 1 x 1 m quadrat. Six quadrats were sampled randomly in each area. The numbers of barnacles in each quadrat as the following.
Area Q1 Q2 Q3 Q4 Q5 Q6
A 2 1 3 1 4 2
B 12 11 15 3 6 2
1. Calculate the estimated population of barnacles in both areas A and B. Please show the details of the calculations. [5]
2. Discuss your findings. [5]
Classify each question based on the ecological level on which it focuses.
How does the rate of disease transmission vary with the distribution of individuals?
A. Population
B.Community
C. Ecosystem
Questions related to population dynamics look at which aspect of a population?
A. How the genetics of a population change over time
B. How the number of species in an environment changes over time
C. How & why population size changes over time
D. How diseases are transmitted through a population
E. The factors that determine the maximum population size that can be supported in an environment
