Tropical Forests and Plant Families Quiz
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Questions and Answers

Which family does Avicennia officinalis belong to?

  • Rhizophoraceae
  • Acanthaceae (correct)
  • Bignoniaceae
  • Euphorbiaceae

Which of the following is NOT a species of the Rhizophoraceae family?

  • Ceriops tagal
  • Rhizophora apiculata
  • Sonneratia alba (correct)
  • Bruguiera gymnorrhiza

Which of the following pairs belongs to the same family?

  • Camptostemon philippinensis - Acrostichum aureum
  • Aegiceras floridum - Xylocarpus granatum
  • Lumnitzera littorea - Lumnitzera racemosa (correct)
  • Dolichandrone spathacea - Excoecaria agallocha

What is the family classification of Scyphiphora hydrophyllacea?

<p>Rubiaceae (B)</p> Signup and view all the answers

Which species is categorized under the Euphorbiaceae family?

<p>Excoecaria agallocha (C)</p> Signup and view all the answers

Which type of forest is characterized by arborescent flora including dipterocarps and has a more or less uniform rainfall throughout the year?

<p>Tropical lowland evergreen rainforest (D)</p> Signup and view all the answers

What is a primary characteristic of the tropical semi-evergreen rainforest?

<p>It includes deciduous subtypes like yakal-lauan. (B)</p> Signup and view all the answers

Where can you find forests over ultramafic rocks, known for their unique flora including species like Scaevola micrantha?

<p>Northern Zambales (D)</p> Signup and view all the answers

Which dipterocarp species is mentioned as part of the tropical lowland evergreen rainforest?

<p>Parashorea malaanonan (B)</p> Signup and view all the answers

What type of forest generally has limiting water availability and is found on the western side of Luzon and Palawan?

<p>Tropical moist-deciduous forest (A)</p> Signup and view all the answers

Which family does Avicennia belong to?

<p>Acanthaceae (B)</p> Signup and view all the answers

What environmental condition primarily supports the growth of mangrove forests?

<p>Clayish seashores (D)</p> Signup and view all the answers

Which of the following species is abundant in mangrove forests?

<p>Rhizophora apiculata (A)</p> Signup and view all the answers

Which genus contains the highest number of species listed in the provided content?

<p>Rhizophora (A)</p> Signup and view all the answers

What characteristic of tropical forests allows for high biodiversity?

<p>Multi-layered structure (B)</p> Signup and view all the answers

What type of soil conditions do Avicennia and Sonneratia commonly occupy?

<p>Mixed with sand or coral limestone (D)</p> Signup and view all the answers

Which species belongs to the family Rhizophoraceae?

<p>Ceriops (C)</p> Signup and view all the answers

Which tropical forest formation is characterized by species adapted for water dispersal?

<p>Beach forest (A)</p> Signup and view all the answers

What typographical characteristic is prevalent in tropical forests?

<p>Thin top soil layer (C)</p> Signup and view all the answers

How many subspecies or hybrids does the genus Avicennia contain according to the content?

<p>2 (C)</p> Signup and view all the answers

What factor contributes to the unique growth forms like epiphytes and lianas in tropical forests?

<p>Multi-layered ecosystem structure (B)</p> Signup and view all the answers

Which species is not listed as a common mangrove species?

<p>Aegialitis (C)</p> Signup and view all the answers

What is a significant ecological feature of tropical rainforests?

<p>Short nutrient cycling process (B)</p> Signup and view all the answers

Which current influences the ecological distribution in the Philippines?

<p>Kuro-Siwo Current (A)</p> Signup and view all the answers

Which statement accurately describes the Northern Sierra Madre?

<p>It hosts the largest contiguous tracts of remaining rainforests. (B)</p> Signup and view all the answers

How many tree species can one hectare of a tropical forest potentially support?

<p>Approximately 650 species (C)</p> Signup and view all the answers

What type of forest occurs at the inland edge of the mangrove forest and the tidal limit of estuaries?

<p>Brackish-water forest (B)</p> Signup and view all the answers

Which plant is dominant in the fresh water swamp forest?

<p>Metroxylon sagu (B)</p> Signup and view all the answers

What characteristic is true of peat swamp forests?

<p>They are known to have a high water table. (B)</p> Signup and view all the answers

What is the typical structure of leaves on Dolichandrone spathacea?

<p>Pinnate with a terminal leaflet (B)</p> Signup and view all the answers

Which of the following statements best describes the water conditions in the fresh water swamp forest?

<p>Regularly to occasionally inundated with mineral-rich water. (D)</p> Signup and view all the answers

What is the maximum height that Dolichandrone spathacea can grow?

<p>Up to 5 m (D)</p> Signup and view all the answers

What type of water mainly nourishes the peat swamp forest?

<p>Rainwater (A)</p> Signup and view all the answers

Which of the following characteristics is NOT true of the brackish-water forest?

<p>It has nutrient-poor soil conditions. (A)</p> Signup and view all the answers

What characterizes the soil composition of the forest over limestone?

<p>Shallow and mainly crystalline limestone (D)</p> Signup and view all the answers

Which of the following trees is primarily dominant in the Molave Forest?

<p>Vitex parviflora (C)</p> Signup and view all the answers

What is the primary elevation range for the tropical lower montane rainforest?

<p>700-1800 m (C)</p> Signup and view all the answers

Which species of pine is found in pure stands in Mindoro above 900 m?

<p>Pinus merkusii (A)</p> Signup and view all the answers

What describes the typical vegetation of the subalpine rainforest on Mindoro Island?

<p>Open vegetation dominated by small woody dicots (C)</p> Signup and view all the answers

In which environmental condition does the tropical upper montane rainforest thrive?

<p>Moist conditions with great exposure to wind (A)</p> Signup and view all the answers

What is a common characteristic of the trees in the mossy forest?

<p>Dwarfed and crooked, seldom reaching 20 m in height (A)</p> Signup and view all the answers

Which tree species can be found in the lower montane rainforest of Zambales?

<p>Falcatifolium gruezoi (B)</p> Signup and view all the answers

Flashcards

Tropical Rainforests

Highly diverse ecosystems with a large number of plant and animal species, characterized by high biomass, nutrient cycling, and a multi-layered structure.

Beach Forest

A narrow strip of woodland along sandy or gravelly beaches, often characterized by plants adapted for saline conditions and seed dispersal by water.

What are some key characteristics of tropical rainforests?

Tropical rainforests are known for their high biodiversity, high biomass, rapid nutrient cycling, and complex structure with multiple layers of vegetation.

Why are tropical rainforests important?

Tropical rainforests play a crucial role in regulating global climate, providing vital ecosystem services, and harboring a significant portion of the world's biodiversity.

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What are some examples of beach forest species?

Common beach forest species include Coconut Palm (Cocos nucifera), Terminalia catappa, Erythrina orientalis, and Barringtonia asiatica.

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What is the significance of the Kuro-siwo current for the Philippines?

The warm Kuro-siwo current, flowing northward along the eastern coast of the Philippines, influences rainfall patterns and contributes to the unique distribution of ecosystems in the archipelago.

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What distinguishes the Northern Sierra Madre rainforest?

The Northern Sierra Madre rainforest in the Philippines is notable as the largest contiguous tract of remaining rainforest in the country.

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What does the phrase 'wet-scape' refer to?

Wet-scape describes the unique distribution of ecosystems and habitats within a geographical region, often characterized by varying rainfall patterns and diverse landscapes.

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Mangrove Species: Avicennia officinalis

A mangrove species belonging to the Avicennia genus, known for its salt tolerance and characteristic pneumatophores (air roots).

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Mangrove Family: Rhizophoraceae

A prominent family of mangrove trees known for their unique adaptations to saltwater environments. Some of the most common mangroves belong to this family.

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Mangrove Species: Rhizophora apiculata

A mangrove species from the Rhizophoraceae family, commonly found in coastal areas. It's known for its pointed leaves and distinctive propagules (seedlings).

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Mangrove Family: Lythraceae

A diverse plant family that includes some mangrove species. It is known for its beautiful flowers and fruits.

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Mangrove Species: Sonneratia alba

A mangrove species belonging to the Lythraceae family, known for its white flowers and its ability to tolerate brackish water.

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Mangrove Forest

A unique ecosystem found along clayish seashores and tidal zones, particularly in river estuaries. This type of forest gradually blends into beach formations.

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Seaward Side of Mangrove Forest

The area closest to the ocean, often characterized by a mix of sand and coral limestone. Species like Avicennia and Sonneratia are typically found here.

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Common Mangrove Species

Rhizophora apiculata, Rhizophora mucronata, Bruguiera cylindrica, B. gymnorrhiza, B. parviflora, B. sexangula, Ceriops decandra, C. tagal, Avicennia marina, Avicennia officinalis, Sonneratia alba, and S. caseolaris are some of the most prevalent mangrove species.

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Avicennia

A genus of mangrove trees that commonly occur on the seaward side of mangrove forests. It's characterized by having 8 species and 4 known hybrids.

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Rhizophora

A genus of mangrove trees known for their unique prop roots. This genus is one of the most diverse, with 6 species and 5 hybrids.

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Mangrove Family

Mangrove trees are grouped into different families based on their shared characteristics and evolutionary relationships.

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Mangrove Diversity

The Philippine mangrove ecosystem boasts a wide variety of species, representing numerous families, genera, and subspecies. This biodiversity is a testament to the resilience and adaptability of these forests.

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Acanthus ebracteatus

This species belongs to the Acanthaceae family and is a type of mangrove found in the Philippines. It is known for its distinctive leaves and is one of the notable members of the Acanthaceae family.

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What are dipterocarps?

Dipterocarps are a family of trees that are a major component of tropical rainforests in Southeast Asia, including the Philippines. They are known for their valuable timber and large, resin-filled fruits.

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What are the characteristics of a tropical lowland evergreen rainforest?

A tropical lowland evergreen rainforest is a type of forest that is characterized by high rainfall, a short dry season, rich arborescent flora (trees), and a diverse collection of trees such as dipterocarps. These forests are typically found in low-lying areas with high humidity.

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What is a semi-evergreen rainforest?

A semi-evergreen rainforest is a type of forest that experiences a longer dry season compared to evergreen rainforests, resulting in some trees losing their leaves during the dry period. They are often found in areas with less consistent rainfall and are characterized by mixed dipterocarp and decidous trees.

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What is a moist-decidous forest?

A moist-deciduous forest is a type of forest that experiences a significant dry season, leading to the shedding of leaves by many trees. They are often found in areas with less reliable rainfall and are characterized by a mix of dipterocarps and decidous trees.

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What is a forest over ultramafic rocks?

This type of forest grows on soil rich in heavy metals, which restricts plant growth. It is characterized by stunted, sclerophyllous vegetation with unique plants adapted to the harsh conditions.

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Brackish-water forest

A type of forest found at the edge of mangrove forests and tidal estuaries, characterized by the palm species Nypa fructicans. It's influenced by a mix of freshwater and saltwater.

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Nypa fructicans

A palm species known for its tolerance to brackish water and its unique, cluster-like fruit. It's a dominant species in brackish-water forests, also called 'nipa palm'.

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Freshwater swamp forest

A type of forest regularly flooded by fresh water from rivers and streams, showing fluctuating water levels. This forest often features the Metroxylon sagu palm species.

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Metroxylon sagu

A palm species dominating freshwater swamp forests. This palm is known for its starchy pith, which is used to produce sago, a staple food in some regions.

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Peat swamp forest

A type of forest growing in areas with high water tables and thick layers of acidic peat (partially decayed plant matter). They receive water mainly from rain.

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Dipterocarp forest

A type of rainforest characterized by the dominance of Dipterocarp trees, occurring from coastal flatlands to higher elevations. Known for its rich biodiversity and tall trees.

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Tui

Common name for Dolichandrone spathacea, a tree species often found in coastal areas like mangrove forests. It is known for its large, white trumpet-shaped flowers.

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Dominant species

A plant or animal species that is most abundant or influential in a particular ecosystem or habitat.

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Molave Forest

A type of forest found on low limestone hills, characterized by shallow soil, scattered large trees, and a dominance of Vitex parviflora.

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Pine Forest

A montane rainforest dominated by two species of pine trees - Pinus insularis and Pinus merkusii, occurring in high altitudes with a distinct dry season.

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Mossy Forest

A montane rainforest occurring at high elevations, characterized by moist conditions, stunted trees covered in mosses and other epiphytes, and a complex floristics composition.

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Subalpine Rainforest

A type of forest found on the highest peaks of mountains, characterized by shallow, acidic soil, open canopy, and a dominance of small woody dicots.

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What is a distinctive feature of the Molave Forest?

The Molave Forest is known for its scattered large trees, with intervening spaces filled with smaller trees and bamboos.

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What is a key characteristic of the Pine Forest?

Pine Forests are characterized by a distinct dry season, making them different from other tropical rainforests in the Philippines.

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What is a unique feature of the Mossy Forest?

Mossy Forests are characterized by stunted, crooked trees that are heavily covered with mosses, liverworts, and other epiphytes.

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How does the Subalpine Rainforest differ from other high mountain vegetation?

Unlike other high mountain vegetation dominated by grasses and sedges, the Subalpine Rainforest is dominated by small, woody dicots.

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Study Notes

Forest Formations in the Philippines

  • The presentation covers different forest formations found in the Philippines
  • A variety of tropical forest types exist; including those over ultramafic rocks, limestone, peat swamps, and more
  • These formations vary based on factors like elevation, climate, soil type, and water availability.

Nature of Tropical Forests

  • Tropical forests exhibit high biodiversity, holding a large number of species per hectare (up to 10,000)
  • These forests are high in biomass, net primary productivity (NPP), and nitrogen (N) uptake.
  • Tropical forest soil layers are thin.
  • Nutrient cycles in tropical forests are short.
  • The structure of the forest is multi-layered, going from emergent trees, to upper canopy, understory, and forest floor.
  • Unique plant growth forms, like epiphytes, lianas, climbers, and stranglers, are common.
  • The microclimate is generally humid and warm.

Factors Affecting Forest Distributions

  • Shifting winds and typhoons are influential in shaping the distribution of rainfall across the archipelago.
  • The Kuro-siwo current affects the rainfall patterns, particularly along the eastern coast.
  • The varied topography (numerous mountains) contributes to the diverse mix of ecosystems.
  • Geographic locations influence the forest formations, such as the Northern Sierra Madre containing large tracts of rainforests.

Specific Forest Types

  • Beach Forest:
    • Narrow woodland along sandy/gravelly beaches
    • Plants adapted to disperse seeds via water
    • Some prominent species include Cocos nucifera (coconut), Terminalia catappa (almond), and others.
  • Mangrove Forest:
    • Occurs along clayish seashores and tidal zones; merging into beach areas
    • Soils are usually a mix of sand and coral limestone
    • Dominant species include Rhizophora spp., Bruguiera spp., and Avicennia spp.
  • Brackish-water Forest:
    • Occurs along the inland edge of mangrove forests and tidal limits of estuaries
    • Dominated by the Nypa fruticans palm
    • The area where soil is wet and/or regularly inundated.
  • Freshwater Swamp Forest:
    • Regularly or occasionally inundated with mineral-rich water from rivers
    • Metzoxylon sagu is dominant within this formation.
  • Peat Swamp Forest:
    • Found in areas with a water table higher than the surrounding areas, possessing peat (50 cm deep)
    • Soil is typically acidic, and incoming water is from rainfall
    • Only known in Leyte and Agusan marsh areas
  • Tropical Lowland Evergreen Rainforest:
    • Ranges from coastal plains to 1200m elevations
    • Best found where rainfall is relatively uniform throughout the year
    • Characterized by richness in arborescent flora and dominated by dipterocarps.
  • Tropical Semi-evergreen Rainforest:
    • Experiences yearly water stress, making it distinct
    • Contains decidous subtypes, such as yakal-lauan and lauan-apitong
    • Found on the western side of the islands, including dry regions like Palawan
  • Tropical Moist-deciduous Rainforest:
    • Found where water availability is limited
    • Found on the western Luzon areas, Palawan, and Mindoro
    • Deciduous dipterocarp subtypes are common to this forest type
  • Tropical Upper Montane Rainforest(Mossy Forest):
    • Located in mountains above 1,000 m elevations
    • Characterized by varied topography, steep ridges and moisture
    • Dwarf trees and increased prevalence of mosses, liverworts, and ferns.
  • Subalpine Rainforest:
    • Found on mountain summits with shallow, acidic, and nutrient-poor soil.
    • Predominantly comprised of small woody dicots, distinguished from vegetation of other high elevation mountains.

Forest over Ultramafic Rocks

  • Growing on soil rich in heavy metals
  • Vegetation is sclerophyllous and relatively stunted, ranging from 2-5 meters tall.
  • Found in Northern Zambales, Northeastern parts of Mindanao, Dinagat Island, and Northern Leyte.
  • Notable plant species include Scaevola, Leptospermum, Brackeridgea, Exocarpus, Gymnostoma, Poutheria, and certain ironwood species.

Forest over Limestone

  • Found in low limestone hills, potentially along coastlines or bordering valleys
  • Soil is thin, primarily crystalline limestone
  • Characterized by a mixture of large trees, smaller trees, and various types of bamboos
  • Prominent species include Vitex parviflora and other leguminous trees, often with short-boled and irregularly shaped trees.

Additional Information

  • The presentation includes various images and some notes about particular tree species found within specific Philippine forest formations.
  • A summary of the classification of specific trees within each formation, and details about their taxonomy.
  • References to particular websites and publications are provided throughout the document.

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Test your knowledge on various tropical forest types and their associated plant families. This quiz covers the classification of trees, species identification, and unique characteristics of forests such as mangroves and dipterocarps. Challenge yourself and learn more about the biodiversity of these ecosystems!

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