Chapter 4 Classification and Biodiversity (50 min Lessons)

As teachers, we have the unique opportunity to introduce students to this underwater world teeming with an incredible variety of organisms. The number of phyla living in the oceans is considerably greater than on land, showcasing a rich tapestry of life forms. Many of these organisms, both adults and larvae, are planktonic, drifting with the ocean currents. Among the more prominent marine animals are crustaceans, echinoderms, bony fish, and cartilaginous fish. Additionally, macroalgae (seaweeds) and seagrasses play a crucial role in forming the basis of many oceanic food chains.

This unit covers the following topics

  • 4.1 The classification of marine organisms
  • 4.2 Key groups of marine organisms
  • 4.3 Biodiversity
  • 4.4 Populations and sampling techniques

Timeframe

  • 5 weeks
  • 23 days/class periods – 45-50 minutes each

Daily Agenda

Note: All pacing suggestions are estimates. Adjust the time to accommodate for specific student needs and interests.
Exposing students to proper blend of lecture, practice activities and questions is of paramount importance for their success on the Cambridge exam.

Curriculum Pacing Guide

1 Day = 45-50 minutes class

Day 1 Lesson

  • 4.1 The classification of marine organisms

Objectives

  • describe the classification of species into the taxonomic hierarchy of domain, kingdom, phylum, class, order, family, genus and species
  • understand and use the binomial system of species nomenclature

Day 2 Lesson

  • 4.1 The classification of marine organisms

Objectives

  • construct and use simple dichotomous keys based on easily identifiable features

Day 3 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • describe and explain the role of phytoplankton and zooplankton

Day 4 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • state the main features of a typical adult echinoderm
  • understand the ecological and economic importance of echinoderms

Day 5 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • state the main features of a typical adult crustacean
  • understand the ecological and economic importance of crustaceans

Day 6 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • make observations and drawings from unfamiliar structures or specimens from the key groups in topic 4.2 and additionally Cnidaria in topic 5.2

Instructional Materials

Day 7 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • state the main internal and external features of a typical adult bony fish
  • understand the ecological and economic importance of bony fish

Day 8 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • state the main internal and external features of a typical adult cartilaginous fish
  • understand the ecological and economic importance of cartilaginous fish
  • describe the characteristics of chordates

Day 9 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • state the main features of a typical macroalga
  • describe the ecological and economic importance of macroalgae

Day 10 Lesson

  • 4.2 Key groups of marine organisms

Objectives

  • state the main features of a typical marine plant
  • describe the ecological and economic importance of marine plants

Day 11 Lesson

  • Review

Objectives

  • Review 4.1 and 4.2

Instructional Materials

Day 12 Lesson

  • Quiz (4.1, 4.2)

Objectives

  • Assessment 4.1 and 4.2

Instructional Materials

  • Quiz (4.1, 4.2)

Day 13 Lesson

  • 4.3 Biodiversity

Objectives

  • explain the different levels of biodiversity
  • understand the importance of marine biodiversity in terms of the services /benefits it provides

Day 14 Lesson

  • 4.4 Populations and sampling techniques

Objectives

  • explain, using marine examples, the terms ecosystem, habitat, niche, species, population and community
  • explain the terms biotic factors and abiotic factors and describe how these factors affect organisms in marine ecosystems

Day 15 Lesson

  • 4.4 Populations and sampling techniques
  • This topic is also covered in Practical Skills section – yes, I cover this twice 🙂

Objectives

  • understand the mark-release-recapture method
  • apply the Lincoln index and identify the limitations of this method
  • describe random and systematic sampling and understand their advantages and disadvantages

Day 16 Lesson

  • 4.4 Populations and sampling techniques
  • This topic is also covered in Practical Skills section – yes, I cover this twice 🙂

Objectives

  • use Simpson’s index of diversity (D) to calculate the species diversity of a habitat and interpret different values of D

Day 17 Lesson

  • 4.4 Populations and sampling techniques
  • This topic is also covered in Practical Skills section – yes, I cover this twice 🙂

Objectives

  • use Spearman’s rank correlation (rs) to analyze the relationships between the distribution and abundance of species and abiotic or biotic factors.

Day 18 Lesson

  • 4.4 Populations and sampling techniques
  • This topic is also covered in Practical Skills section – yes, I cover this twice 🙂

Objectives

  • use Spearman’s rank correlation (rs) to analyze the relationships between the distribution and abundance of species and abiotic or biotic factors. -review/practice

Instructional Materials

Day 19 Lesson

  • Review

Objectives

  • Review the objectives of the chapter

Day 20 Lesson

  • Review

Objectives

  • Review the objectives of the chapter

Day 21 Lesson

  • Review

Objectives

  • Review the objectives of the chapter

Instructional Materials

Day 22 Lesson

  • Review

Objectives

  • Review the objectives of the chapter

Instructional Materials

Day 23 Lesson

  • Chapter 4 Test

Objectives

Instructional Materials

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