Tropical rainforests – prezentace

Téma prezentace: Tropical rainforests

Typ souboru: prezentace PPTX

Přidal(a): Adriena Redlová

 

 

Popis materiálu:

Prezentace do angličtiny na téma tropické deštné lesy. Obsahuje obecné informace a zajímavosti o tomto klimatickém pásu. Je k dispozici také v češtině například do zeměpisu: https://prezmania.cz/tropicke-destne-lesy-prezentace.

 

Osnova:

 

Content

  • What is a Tropical Rainforest?
  • Location
  • Plants & Animals of Tropical Rainforests
  • Rainforest People
  • Summary: Importance & Destruction of TRF

 

What Makes a Rainforest?

Location: the tropics

Rainfall: 2000 mm of rain per year

Canopy: leafy layer 30 m above the ground

Biodiversity: high level; ½ of the plants and animals found on Earth’s land live in TRF

Symbiotic relationships between species: species in the rainforest often work together

 

Location

The countries with the largest areas of tropical forest:

1)Brazil

2)Democratic Republic
of Congo

3)Indonesia

4)Peru

5)Colombia

 

Rainforest Rivers

Amazon

Mekong

Orinoco

Congo

 

Structure: Vertical Layers

  • Overstory
  • Canopy
  • Understory
  • Shrub Layer
  • Forest Floor

 

Vertical Layers

The Forest Floor

Dark and Humid

Decomposition

Canopy

“the leafy world“

30 m above the ground

60 – 90% of life in TRF

 

Canopy walkways

 

Biodiversity

Biodiversity in numbers

Less than 2% of Earth’s surface -> more than 50% of the plants and animals on Earth

US: 81 species of frogs -> Madagascar: 500 species

Area of 2 football fields in a TRF: more than 400 species of trees -> an equal area of forest in the US fewer than 20

Reasons

Climate (a lot of sunlight -> energy made by photosynthesis)

Canopy (sources of food, shelter and hiding place)

 

Rainforest Plants

Only few ground plants

Constant battle for access to sunlight -> straight and tall trees

Epiphytes (air-plants): orchids, bromeliads

 

Trees

Timber: Ebony, Mahogany, Rosewood (palisandr), Balsa Tree, Teak, Cedar

-> high-quality, durable furniture

Diversity -> deforestation

of large areas for timber

Minimal seasonal differencies

->  only indistinct annual rings

 

Buttress Roots

Large roots on all sides of
a shallowly rooted tree

 

Mangroves

Trees growing in

-“brackish water“ = seawater + freshwater mixed in a river

-seawater

 

Rainforest Animals

Rainforest people

 

Medicinal Plant Knowledge

Shaman = Medicine man

Knowledge of medicinal plants: incredible healing power

Going “extinct“

 

Great Civilizations

Mayas, Incas, Aztecs

 

The Importance of the Rainforests

Tropical Rainforests:

Stabilize the world’s climate

Provide a home to many plants and animals

Maintain the water cycle

Provide protection against erosion, drought, flood

Are source for medicines, foods, wood, minerals, natural resources and recreation

Are an interesting place to visit!

 

The Destruction of Rainforests

Rainforests are cut down for:

wood for both timber and wood fuel

agriculture for farms

land for poor farmers

land for cattle

pulp for making paper

road construction

minerals and energy

 

Deforestation

Agriculture

Poor farmers

Agricultural companies

Extraction of minerals and energy

Gold, copper, diamonds, precious metals, gemstones