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Unit 3   Biodiversity Management

Unit 3 Biodiversity Management



VCE Environmental Science: Unit 3 - Area of Study 2 Notes about Biodiversity Management from Tracey Gray

VCE Environmental Science: Unit 3 - Area of Study 2 Notes about Biodiversity Management from Tracey Gray



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    Unit 3   Biodiversity Management Unit 3 Biodiversity Management Presentation Transcript

    • Biodiversity Management How is scientific data is applied to the assessment of environmental risk in ensuring biodiversity.
    • SAC 3- Outcome 3: Environmental Assessment.
      • TASK: Written response to set of 6 questions:
          • Relative abundance (data set)
          • Type I and Type II errors
          • Precautionary principal
          • Risk assessment – PVA
          • Environmental impact conservation strategy.
          • Conservation Agreements
      • SAC 3: Thursday 22 nd and Friday 23 rd May 2008. Key
        • Knowledge and skills in:
            • Comprehensive use of scientific data and the application of simple indices to assess the level of biodiversity and the assessment of threats.
            • Conclusions drawn from practical activities (data sets) are relevant, accurate and based on evidence.
    • Biodiversity management
      • In Victoria an Environmental Effect Statement (EES) is prepared by the proponent (person/organisation) planning the development.
      • The Environmental Effect Statement addresses:
          • The projects key objectives, description of the development proposed, description of the existing environment and the likely environmental effects resulting from the proposal.
          • Safeguards that will minimise likely environmental effects.
      • The Environmental Effect Statement identifies potential environmental issues and proposes steps to reduce the identified environmental impacts.
      • Environmental impact statements often require information on biodiversity.
          • Information is collected using scientific methods (i.e. existing data and field surveys).
    • Life cycle of an Environmental Effects Statements 4. Review of information usually by a Panel (ie. VCAT, state government) 2. Environmental Effect Statement created by proponent 3. Research & Field work, survey of the site of proposed work; To identify the impact of project on the ecosystem ID: species of importance,. Water, air, soil, biodiversity. 1. Project proposed 5. Decision is made on the Environmental Effect Statement
    • Statistical techniques to evaluate management.
      • How do we scientifically determine if a development has an environmental impact?
      • Hypothesis testing.
          • Comparison of conditions using information or data.
          • Comparison is made between sites and within sites.
      • In vegetation management comparisons are made using different scientific techniques:
        • Quadrats and line transects.
        • Species counts to identify abundance or richness.
    • Hypothesis testing
      • A Hypothesis tests the difference between the conditions.
        • Null hypothesis (H o ): That there is no difference between conditions.
        • Alternative hypothesis (H 1 ): That there is a difference between conditions.
    • Type I and Type II errors:
      • When making the decision to accept or reject the null hypothesis there are two types of errors that can occur.
      • Type I error : finding a difference between environmental conditions when there is none.
        • Such a decision could lead to stopping development to remedy the situation when it is not necessary to do so.
      • Type II error: when no difference between environmental conditions is found, when there is actually a difference.
        • In this case the assessment would conclude that there has been no impact on the environment when there actually has been some impact. So that the development has had an impact.
    • Precautionary principal
        • Precautionary Principal: Is careful evaluation to avoid serious or irreversible damage to the environment does not occur.
      • The precautionary principal is applied when scientific information insufficient.
      • The precautionary principal makes sure that decisions are made on a number of factors including:
          • Shifting the burden of proof to the proponents of the activity.
          • Taking preventative action in the face of uncertainty.
          • Exploring a wide range of alternatives to the possibly harmful actions. Is there another way of doing things?
          • Increasing public participation in decision making.
    • Relative abundance:
      • Practical activity:
        • You are apart of the Orange-bellied Parrot recovery team you are required to conduct field surveys to provide biodiversity information on three sites that a new coastal housing development is proposed on. You conduct your survey using line transects . Your survey must consider the impact on food plants Beaded Glasswort (Sarcocornia quinqueflora) on the Orange-bellied Parrot population. Compare the abundance of this plant at each of the sites and make recommendations based on your findings.
          • Examine the number of quadrats at each site to statistically test the difference between sites.
          • Calculate the mean species abundance of Orange-bellied Parrot food plants beaded glasswort.
          • Mean (total) / N o of quadrats
          • 3 . Answer the question refer to the data to justify your answers.
    • OBP habitat survey: Beaded Glasswort plants at each site. Transect (10 m) Site A Yambuk Site B Killarney Site C Port Fairy 1 15 8 8 2 60 5 31 3 46 10 45 4 23 15 27 Total Mean No of quadrats
    • Using the data to find solutions:
      • Identify the site and transect line that has the lowest number of beaded glasswort plants? Support this with data. (Ie. Low site recorded ** number of ****).
      • Why is this site important for Orange-bellied Parrots? Support with data comparisons. (refer to ecological requirements.)
      • Suggest two management techniques to protect and enhance the diversity at the site that recorded the lowest number of Beaded Glasswort?
      • Which site would you recommend for the new coastal development? Discuss two supporting reasons for your decision, include references to the data.
      • How would your interpretation of the results and recommendations change if a type 1 error occurred?
    • PVA
      • Population Viability Assessment:
      • Determining the threats faced by a species and evaluating the likelihood that it will persist for a given time into the future.
      • PVA is used because it links planning, research and data collection, assessment of vulnerability and the ranking of management options.
      • A PVA includes:
        • Ecosystems: Habitat type and availability.
        • Breeding and longevity: Birth and death rates.
        • Demographics; age structure of populations.
        • External influences: weather events.
    • Actions for Biodiversity Conservation
      • Biodiversity conservation is often limited by funding actions have to prioritise actions to assist species conservation.
          • Vitally important in the short term.
          • Important long term action
          • Least important
          • Data collection for monitoring programs
          • Education programs
          • How do you rate this in terms of importance for the Orange-bellied Parrot?
    • Strategies for protecting biodiversity
      • CITES – trade of species
      • World Heritage Areas
      • Ramsar convention (1993) – significant wetlands.
      • JAMBA- migratory bird agreement between Japan and Australia.
      • Environmental Protection and Biodiversity Conservation Act (1999)
      • Victoria Flora and Fauna Guarantee Act (1999).