Tropical Rain Forest

patrick,kiyanna-2 biology biome project

part one

General climate-The temperature in a rain forest rarely gets higher than 93 °F (34 °C) or drops below 68 °F (20 °C); average humidity is between 77 and 88%;There is usually a brief season of less rain. In monsoonal areas, there is a real dry season. Almost all rain forests lie near the equator.

General positioning-The tropical rain forest can be found in three major geographical areas around the world.

  • Central America in the Amazon river basin.
  • Africa - Zaire basin, with a small area in West Africa; also eastern Madagascar.
  • Indo-Malaysia - west coast of India, Assam, Southeast Asia, New Guinea and Queensland, Australia. Herbivore-
  • red panda Detrivore-
  • worms Vascular plant-
  • ferns (one of the earliest vascular plants) Non-Vascular plants-
lichen & algae Gymnosperm- One type of gymnosperm found in the tropical rain forest is Parana pine tree (Aracaria angustifolia). Angiosperm-Some angiosperms that are located in the tropical rain forest are Cohune palm trees (Orbigyna cohune)


Leaf cutter ants and fungus are an example of this relationship. The ants protect the fungi from pests and mold and also feed it with small pieces of leaves. The ants keep their larvae in the fungi which protects it and feeds it.

The strangler fig starts out life growing on a branch of a tree. It grows both downwards towards the ground and upwards to the sky, while also winding around the tree. The strangler fig kills the tree by stealing sunlight and root space after enveloping it.

Bromeliads, to get enough light, grow on high branches of trees. This does not do any damage to the tree itself, but it allows the brmeliad to survive.

part 2

  • This climate is found near the equator. That means that there is more direct sunlight hitting the land and sea there than anywhere else. The sun warms the land and sea and the water evaporates into the air. The warm air can hold a lot of water vapor. As the air rises, it cools. That means it can hold less water vapor. Then as warm meets cold, condensation takes place and the vapor forms droplets and clouds form. The clouds then produce rain. It rains more than ninety days a year and the strong sun usually shines between the storms. The water cycle repeats often along the equator.
  • Density-Dependent Factors:
A density-dependent factor affects a population size positively or negatively because of the size of that population. Examples of this are predators hunting more of a specific prey in an area due to increase in population or food supply of a species declining due to rapid growth of a population.

  • Density-Independent Factors:
A density-independent factor affects a population no matter the size. Human activity, such as deforestation affects many populations. Also, natural distasters and tropical storms are examples of density-independent limiting factors.

  • A study initiated by University of Minnesota plant biologist George Weiblen has confirmed what biologists since Darwin have suspected - that the vast number of tree species in rain forests accounts for the equally vast number of plant-eating species of insects.
  • Studies and show that plant speciation may also involve complex mate recognition systems.
  • Studies and show that plant speciation may also involve complex mate recognition systems.

Part 3

Stomata-minture aprture structures on a plant

Roots/hairs- each of a large number of elongated microscopic outgrowths

Xylem-takes dissolved nutrients upward

Phloem-takes metablolics donward

Flowers-sexual reproduction of plants

Cones-the dry fruit of a conifer

Meriestems-a region of plant tissue

Seeds-a flowering plant of reproduction

Part four


Single celled