PTE · Describe Image

Oceanic Ecology and Marine Adaptations: PTE Describe Image practice questions

3 original Describe Image questions. Question 1 is free to record, play back and compare with a sample answer right here; log in free to practise the rest in the BandLadder app.
  • 3 questions
  • Question 1 free, no login
  • PTE Academic and PTE Core
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1

Abyssal Biomass by Depth Zone

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Look at the image below. You have 25 seconds to study it, then 40 seconds to describe in detail what it shows.

Marine Benthic Biomass Across Oceanic Depth Zones (grams per square metre). Benthic Biomass: Epipelagic (0-200m) 250, Mesopelagic (200-1000m) 80, Bathypelagic (1000-4000m) 20, Abyssopelagic (4000-6000m) 5, Hadal (6000m+) 1.

Marine Benthic Biomass Across Oceanic Depth Zones (grams per square metre)
050100150200250Epipelagic (0-200m)Mesopelagic (200-1000m)Bathypelagic (1000-4000…Abyssopelagic (4000-600…Hadal (6000m+)
View the data
Epipelagic (0-200m)Mesopelagic (200-1000m)Bathypelagic (1000-4000m)Abyssopelagic (4000-6000m)Hadal (6000m+)
Benthic Biomass250802051

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Questions 2–3

Look at the image below. You have 25 seconds to study it, then 40 seconds to describe in detail what it shows.

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2

Whale Fall Ecological Succession

Succession Stages of a Deep-Sea Whale Fall. Stage 1: Mobile scavenger phase consumes soft tissue. Stage 2: Enrichment opportunist phase colonises surrounding sediments. Stage 3: Sulfophilic stage breaks down skeletal lipids. Stage 4: Reef stage provides mineral substrate for invertebrates.

Succession Stages of a Deep-Sea Whale Fall
  1. 1.Mobile scavenger phase consumes soft tissue
  2. 2.Enrichment opportunist phase colonises surrounding sediments
  3. 3.Sulfophilic stage breaks down skeletal lipids
  4. 4.Reef stage provides mineral substrate for invertebrates
3

Planktonic Community Taxonomic Composition

Proportion of Microscopic Plankton Groups in Coastal Waters (%). Diatoms 45, Dinoflagellates 25, Copepods 15, Ciliates 10, Radiolarians 5.

Proportion of Microscopic Plankton Groups in Coastal Waters (%)
  • Diatoms: 45%
  • Dinoflagellates: 25%
  • Copepods: 15%
  • Ciliates: 10%
  • Radiolarians: 5%
View the data
CategoryValue (%)
Diatoms45
Dinoflagellates25
Copepods15
Ciliates10
Radiolarians5

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