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Tropical rainforest - Quiz
Contributed by: Fernandes
  • 1. What is the typical height range of trees in the canopy layer?
A) 70–80 m
B) 45–55 m
C) 30–45 m
D) 10–20 m
  • 2. Which plants commonly grow as epiphytes in the canopy?
A) Grass, shrubs, and bamboo
B) Orchids, bromeliads, mosses and lichens
C) Conifers, ferns, and cactuses
D) Mangroves, palms, and algae
  • 3. How do epiphytic plants in the canopy obtain water and minerals?
A) From rain and debris collecting on supporting plants
B) From the soil beneath the trees
C) From parasitic roots in the trunk
D) From underground water reservoirs
  • 4. What is the estimated arthropod species richness of the tropical canopy?
A) 5 million
B) 50 million
C) 20 million
D) 100 million
  • 5. Which of these animals is mentioned as an inhabitant of the canopy layer?
A) Large flying fox
B) King colobus
C) Crowned eagle
D) Three-toed sloth
  • 6. What is the typical height range of trees in the emergent layer?
A) 10–20 m
B) 30–45 m
C) 45–55 m
D) 80–100 m
  • 7. What challenges must trees in the emergent layer withstand?
A) Lack of sunlight and high pressure
B) Flooding and drought
C) Hot temperatures and strong winds
D) Heavy snow and frost
  • 8. Which of these is identified as a tree species in the emergent layer?
A) Orchidaceae
B) Psittacus erithacus
C) Dipteryx panamensis
D) Bryophyta
  • 9. What is the role of gaps formed by collapsing trees in the rainforest?
A) They stop the growth of saplings
B) They decrease the biodiversity of the area
C) They allow for the establishment and growth of new trees
D) They prevent sunlight from reaching the floor
  • 10. What percentage of tree species at La Selva Biological Station depend on canopy openings?
A) 50%
B) 75%
C) 90%
D) 25%
  • 11. Where are tropical rainforests generally located?
A) Within high-altitude deserts
B) In temperate mountainous zones
C) Near the polar regions
D) Around and near the equator
  • 12. What are the three major climatic parameters defining an equatorial climate?
A) Temperature, rainfall, and dry season intensity
B) Wind speed, humidity, and soil pH
C) Altitude, latitude, and longitude
D) Solar radiation, cloud cover, and salinity
  • 13. According to Holdridge, what is the annual temperature requirement for a true tropical rainforest?
A) Lower than 10 degrees Celsius
B) Exactly 20 degrees Celsius
C) Greater than 24 degrees Celsius
D) Between 5 and 15 degrees Celsius
  • 14. What is the threshold for annual rainfall in a true tropical rainforest according to Holdridge?
A) Exactly 0.5 m
B) Less than 1 m
C) Greater than 10 m
D) Greater than 2 m
  • 15. What does the PET value of <0.25 represent in tropical ecosystem classification?
A) Potential evapotranspiration ratio
B) Plant evaporation total
C) Productivity ecosystem temperature
D) Precipitation energy threshold
  • 16. What is the minimum mean monthly temperature required for a tropical rainforest?
A) 18 °C
B) 25 °C
C) 10 °C
D) 20 °C
  • 17. What is the typical range of annual rainfall in tropical rainforests?
A) 1,750 mm to 3,000 mm
B) 500 mm to 1,000 mm
C) 3,500 mm to 5,000 mm
D) 1,000 mm to 1,500 mm
  • 18. What proportion of all living plant and animal species on Earth reside in rainforests?
A) One third
B) One quarter
C) Two thirds
D) Half
  • 19. What proportion of all flowering plants can be found in rainforests?
A) Two-thirds
B) One tenth
C) Half
D) One quarter
  • 20. How many insect species can be found in a single hectare of rainforest?
A) 807
B) 313
C) 42,000
D) 1,500
  • 21. What is identified as a major cause of species extinction in modern times?
A) Natural volcanic activity
B) Increased forest growth
C) Climate stabilization
D) Human-driven habitat destruction
  • 22. What process in the past acted as a driver of speciation in rainforests?
A) Heavy logging
B) Habitat fragmentation
C) Pharmacy research
D) Agricultural expansion
  • 23. What nickname is given to tropical rainforests due to their medicinal value?
A) Lungs of the earth
B) Green treasure chest
C) World's largest pharmacy
D) Nature's laboratory
  • 24. Which layer of the tropical rainforest contains towering trees?
A) Understory layer
B) Canopy layer
C) Forest floor
D) Emergent layer
  • 25. What is a major human activity threatening tropical rainforests?
A) Urban tourism
B) Agricultural expansion
C) Organic farming
D) Scientific research
  • 26. Which international program aims to curb deforestation?
A) REDD+
B) Global Green Accord
C) Carbon Neutral Treaty
D) Rainforest Protection Initiative
  • 27. What happens to light penetration on the tropical rainforest floor?
A) It is consistent
B) It is low
C) It is filtered by high-intensity sun
D) It is high
  • 28. Most tropical rainforests today are located on fragments of which ancient supercontinent?
A) Rodinia
B) Pangaea
C) Laurasia
D) Gondwana
  • 29. Which of the following is NOT one of the five major regions where tropical rainforests are found?
A) Northern Europe
B) New Guinea
C) Tropical America
D) Madagascar
  • 30. What is another name for moist seasonal tropical forests?
A) Tropical mixed forest
B) Cloud forest
C) Várzea
D) Emergent forest
  • 31. At what elevations are montane rainforests known as cloud forests?
A) Valleys
B) Lower elevations
C) Sea level
D) Higher elevations
  • 32. What is the name for tropical freshwater swamp forests in the Amazon basin?
A) Várzea
B) Emergent layer
C) Cloud forest
D) Understory
  • 33. Which animal is mentioned as inhabiting the forest floor?
A) Poison dart frog
B) Leopard
C) Boa constrictor
D) Okapi
  • 34. Why does plant and animal waste disappear quickly on the forest floor?
A) Strong winds blow the waste away
B) Large animals consume the waste
C) The soil absorbs the waste immediately
D) Warm, humid conditions promote rapid decay
  • 35. What types of organisms help decay waste on the forest floor?
A) Reptiles
B) Fungi
C) Sunlight
D) Large mammals
  • 36. What percentage of sunlight reaches the understory layer?
A) 2%
B) 25%
C) 15%
D) 5%
  • 37. What is a common adaptation of understory plants to low light?
A) Larger leaves
B) Lack of roots
C) Shorter stems
D) Brightly colored flowers
  • 38. Which animal is commonly found in the understory layer?
A) Leopard
B) Tapir
C) Okapi
D) Sumatran rhinoceros
  • 39. Which of the following is true regarding oxisols compared to ultisols?
A) Oxisols are young and unweathered
B) Oxisols are better drained
C) Oxisols have higher clay content
D) Oxisols are nutrient-rich
  • 40. What physical property of soil controls tree turnover rates?
A) Physical properties
B) Available nitrogen
C) Phosphorus levels
D) Bauxite concentration
  • 41. What industrial material is sometimes produced by the laterization process in oxisols?
A) Phosphorus
B) Limestone
C) Calcium carbonate
D) Bauxite
  • 42. Which region has the lowest primary productivity due to heavily weathered oxisols?
A) Eastern Amazon
B) Volcanic Costa Rica
C) Western Amazon
D) Andean foothills
  • 43. What primary nutrient limitation is common in tropical rainforest soils?
A) Phosphorus
B) Potassium
C) Nitrogen
D) Calcium
  • 44. What is the process of breaking down organic matter into inorganic forms usable by plants?
A) Respiration
B) Leaching
C) Photosynthesis
D) Decomposition
  • 45. What do microbial communities take up during the decomposition process?
A) Nitrogen
B) Oxygen
C) Phosphorus
D) Carbon dioxide
  • 46. What do microbial communities release during the decomposition process?
A) Carbon dioxide
B) Phosphorus
C) Nitrogen
D) Oxygen
  • 47. How can the rate of decomposition be measured?
A) By measuring soil depth
B) By measuring carbon dioxide release
C) By measuring plant height
D) By measuring oxygen uptake
  • 48. What is the driving force moving decomposable carbon from litter to soil?
A) Temperature
B) Sunlight
C) Wind
D) Precipitation
  • 49. How are nutrients released from decaying litter taken up by plants?
A) Through animal waste
B) Through surface or ground waters
C) Through direct atmospheric absorption
D) Through bark absorption
  • 50. What is defined as an ecological process changing community structure over time?
A) Speciation
B) Deforestation
C) Endemism
D) Succession
  • 51. Which of these is an example of a natural disturbance causing forest gaps?
A) A fallen tree
B) Increased sunlight
C) Nutrient accumulation
D) Secondary growth
  • 52. What are regenerating young successional forests called?
A) Primary climax forests
B) Secondary forests
C) Ancient refuges
D) Deforested zones
  • 53. What process allows species to coexist by utilizing different food sources or habitats?
A) Pleistocene refugia
B) Interspecific competition
C) Niche partitioning
D) Secondary succession
  • 54. Who developed the theory of Pleistocene refugia in 1969?
A) Charles Darwin
B) Gregor Mendel
C) A group of Costa Rican scientists
D) Jürgen Haffer
  • 55. According to the Pleistocene refugia theory, what separated rainforest patches?
A) Human-made barriers
B) High-speed winds
C) Non-forest vegetation
D) Large mountain ranges
  • 56. Why is the Pleistocene refugia theory subject to debate?
A) Genetic evidence suggests speciation occurred earlier
B) It ignores the role of human activity
C) It lacks clear definitions of species
D) It only applies to birds
  • 57. What do buttress roots collect to provide added nutrition?
A) Atmospheric nitrogen
B) Mineral dust
C) Leaf litter
D) Rainwater runoff only
  • 58. Which group of people in Borneo is known for a traditional headhunting culture?
A) Dayak
B) Penan
C) Lumad
D) Mbuti
  • 59. What is the primary reason food resources are dispersed in the rainforest?
A) Excessive rainfall
B) Low soil fertility
C) High biological diversity
D) Lack of sunlight
  • 60. Which of the following is an example of a high-value product traded by forest dwellers?
A) Hardwood timber
B) Honey
C) Rubber
D) Palm oil
  • 61. Which country reported 67 uncontacted tribes in 2007?
A) Indonesia
B) Democratic Republic of the Congo
C) Brazil
D) Peru
  • 62. Which hardwood species is specifically mentioned as being sought by loggers?
A) Pine
B) Ipe
C) Cedar
D) Oak
  • 63. Which of these is a name for a Central African Pygmy group?
A) Lumad
B) Dayak
C) Mbuti
D) Huaorani
  • 64. What is another name for swidden cultivation?
A) Terrace farming
B) Industrial agriculture
C) Hydroponics
D) Slash-and-burn
  • 65. What is a benefit of the traditional swidden practice of fallowing?
A) Increases rainfall
B) Eliminates forest pests
C) Prevents timber loss
D) Preserves soil organic matter
  • 66. What are Pygmy peoples in Southeast Asia often referred to as?
A) Lumad
B) Amerindians
C) Negrito
D) Dayak
  • 67. Which of the following is an indigenous group of the Amazon?
A) Yanomamö
B) Twa
C) Aka
D) Penan
  • 68. Which of these food items originated in tropical rainforests?
A) Potato
B) Corn
C) Wheat
D) Yam
  • 69. How many cultivated kinds of fruit have tropical forests supplied?
A) 43
B) 20
C) 251
D) 250
  • 70. What is the primary source of genetic variation used to evade new pest damage?
A) Imported crop varieties
B) Resistant wild stock
C) Artificial fertilizers
D) Laboratory gene editing
  • 71. When did tropical rainforests take up a third less carbon than they did in the 1990s?
A) 2020
B) 1985
C) 2015
D) 2019
  • 72. By which decade might a typical tropical forest become a carbon source?
A) 2040s
B) 2030s
C) 2060s
D) 2050s
  • 73. How can tourism revenue directly assist in habitat protection?
A) Subsidies for logging equipment
B) Corporate deforestation permits
C) Government subsidies for crops
D) Park-entrance fees
  • 74. What is a positive outcome of bringing people into closer contact with the environment through tourism?
A) Reduction in wildlife population
B) Replacement of native flora
C) Lowering of environmental awareness
D) Increased public appreciation
  • 75. In which region has tourism specifically had a notable positive effect on wildlife preservation?
A) Antarctica
B) North America
C) Europe
D) Africa
  • 76. How many tree species with edible fruits are found in New Guinea alone?
A) 251
B) 20
C) 250
D) 43
  • 77. What is considered a non-extractive use of rainforests?
A) Yam farming
B) Sugarcane production
C) Ecosystem services
D) Logging
  • 78. Which precious metal is mentioned as being extracted from underneath rainforests?
A) Gold
B) Platinum
C) Iron
D) Copper
  • 79. What percentage of Ghana's original rainforest remains after decades of mining?
A) 5%
B) 50%
C) 12%
D) 25%
  • 80. What percentage of the typical Yanomamo diet comes from farmed plants?
A) 75%
B) 90%
C) 50%
D) 20%
  • 81. What is suggested to allow secondary forest to grow and replenish the soil?
A) Fallow periods
B) Chemical fertilization
C) Constant cultivation
D) Frequent irrigation
  • 82. What is the main conflict mentioned regarding agricultural land use?
A) Urbanization versus rural expansion
B) The government versus the police
C) Livestock farming versus crop farming
D) Individual farmers' needs versus global needs
  • 83. What are species with specialized feeding habits less likely to do when their prey population declines?
A) Migrate to new continents
B) Use alternative resources
C) Increase their territory size
D) Change their reproductive cycle
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