Marine Biome Essay Test

2. What are the major terrestrial biomes?

The major terrestrial biomes are: tundra, taiga (or boreal forest), temperate forests, tropical forests, grasslands and deserts. 


3. What is the typical vegetation and typical fauna of the tundra?

Tundra has vegetation formed mainly of mosses and lichens. Among fauna, animals with a large amount of fur, such as caribou, musk oxen and polar bears, as well as migratory birds, are found. 

  • The World's Biomes Review - Image Diversity: tundra


4. What is the typical vegetation and typical fauna of the taiga?

Taiga, or boreal forest, is characterized by coniferous trees, which form pine forests. It also contains mosses, lichens, small bushes and angiosperms. In the taiga, many mammals, such as moose, wolves, foxes and rodents, migratory birds and a large diversity of insects are found. 

  • The World's Biomes - Image Diversity: taigas

Temperate Forests

5. What is the typical vegetation and typical fauna of temperate forests?

In temperate forests, deciduous trees predominate. Mammals are found in large numbers, such as bears and deer. 

6. What are deciduous trees?

Deciduous trees are plants that lose their leaves during a period of the year. In the case of the deciduous trees of the temperate forest, their leaves fall in the autumn (fall). The loss of leaves is a preparation to face the cold months of the winter: their roots, trunk and branches are more resistant to low temperatures and snow than the leaves; and without leaves, the metabolic rate of the plant is reduced. In turn, the decaying fallen leaves help to nourish the soil. 

Tropical Forests

7. What is the typical location of tropical forests regarding latitude?

Tropical rain forests, such as the Amazon Rainforest and the Congo Rainforest, are typically located at low latitudes, in equatorial and tropical zones. 

8. What is the typical vegetation and typical fauna of tropical forests?

In the vegetation of  tropical forests, broadleaf evergreen trees predominate. On the top of the trees epiphytes and lianas grow. Many varieties of pteridophytes can be found in these forests. Regarding fauna, the abundance and diversity is also great: there are monkeys, rodents, bats, insectivores, felines, reptiles, birds, amphibians and invertebrates, which are mainly insects. 

9. How can the abundance and diversity of living organisms in tropical forests be explained?

The biodiversity of these ecosystems can be explained by the great availability of the main abiotic factors for photosynthesis. Since these factors are abundant, plants can perform maximum photosynthetic activity, living and reproducing easily. With a large amount and diversity of producers (autotrophs), the consumers (heterotrophic animals and microorganisms) also have abundant food and a complex food web emerges, creating many different ecological niches to be explored. Therefore, the appearance of varied living organisms as well as the existence of large populations is possible.

10. Why are tropical forests also known as stratified forests?

In tropical forests, tall trees of several species have canopies, forming an upper layer under which diverse other trees and plants develop, forming other lower layers. From the upper layer to the lower layers, the penetration of light lowers gradually and the exposure to wind and rain, the moisture and the temperature also vary. Different compositions of abiotic factors condition the prevalence of different vegetation in each layer.


11. What is the typical vegetation of grasslands?

Grasslands are mainly formed of herbaceous (non-woody) vegetation: grass, bushes and small trees. 

  • The World's Biomes Review - Image Diversity: grasslands

12. What are the grasslands of North America and of South America respectively called?

The steppe grasslands of North America are called prairies. The grasslands of South America are known as “pampas” (the steppe grassland) and “cerrado” (the savannah grassland). 

13. How are grasslands classified?

Grasslands may be classified into steppes and savannahs. In steppes, the prevailing vegetation is grass, such as in the pampas of South America and in the prairies of North America. Their fauna is mainly composed of herbivores, such as rodents and ungulates. Savannahs contain small trees, such as in the Brazilian cerrado or the African savannahs. The fauna is diverse; the Brazilian cerrado contains animals such as ostriches, lizards, armadillos, jaguars, etc., as well as many types of insects; the African savannahs are home to large herbivores and carnivores, such as zebras, giraffes, antelopes, lions and leopards. 

  • The World's Biomes Review - Image Diversity: savannah


14. What is the typical vegetation and typical fauna of deserts?

The predominant fauna of desert ecosystems is composed of reptiles, such as lizards and snakes, terrestrial arthropods and small rodents. In these areas, plants very adapted to a dry climate may be found, such as cacti, which are plants that do not have real leaves and therefore lose less water, along with grasses and bushes near places where water is available. 

  • The World's Biomes Review - Image Diversity: deserts

15. Which terrestrial vertebrate group is extremely rare in deserts?

Amphibians are terrestrial vertebrates extremely rare in desert environments (although there are a few species adapted to this type of ecosystem). Amphibians are rare in deserts because they have a permeable skin and, as a result, they easily lose water by evaporation and dehydrate. They also need an aquatic environment to reproduce, since their fertilization is external and their larva is water-dependent. 

Plankton, Nekton and Benthos

16. What are plankton, nekton and benthos?

Plankton, nekton and benthos are the three groups into which aquatic living organisms can be divided.

Plankton is formed by algae and small animals that float near the surface of water and which are carried by the stream. Nekton is composed of animals that actively swim and dive in water, such as fish, turtles, whales, sharks, etc. Benthos comprises the animals ecologically linked to the sea floor, including many echinoderms, benthic (demersal) fish, crustaceans, molluscs, poriferans and annelids. 

The World's Biomes Review - Image Diversity: planktonnektonbenthos

17. What are  phytoplankton and zooplankton?

Phytoplankton and zooplankton are types of plankton. Phytoplankton includes autotrophic floating organisms: algae and cyanobacteria. Zooplankton is formed of heterotrophic planktonic organisms: protozoa, small crustaceans, cnidarians, larvae, etc.

18. What group of aquatic organisms is composed of a large number of photosynthetic organisms?

Many photosynthetic organisms are found in plankton,on the surface of aquatic ecosystems. This is because light is abundant on the surface.

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A biome, also known as life zones, consists of all plants, animals, and other organisms, as well the physical environment in a particular area. A biome is characterized by its’ plant life, climate, and location. The climate and physical features determine the boundaries of a biome. A biome is made up of many different ecosystems. The ecosystems tend to have the same pants and animals as neighboring biomes around the boundaries. The major biomes are the tundra, taiga, tropical rain forest, temperate forests, desert, grassland, savanna, chaparral, and marine. Each biome has it’s own characteristics such as the tundra. The tundra is a biome that is located in the Northern Hemisphere of the world. It circles the North Pole and reaches down to…show more content…

The plants living in this biome have had to make adaptations. These adaptations consist of needle-like leaves to prevent water loss, conical shape to help shed snow that may weight down and break the branches, and their evergreen color to help photosynthesis to occur. The other types of life found in the forest are that of animals. Some examples of those are lynx, weasel family, snowshoe varying hare, red squirrel, lemmings, voles, elk or wapiti, moose, beaver, wood warblers, finches, sparrows, and ravens. These are just a few of the animals found in this biome. Another biome of the world is the chaparral. It’s found in only 5 places in the world. They are Southern California, South Africa, Western Australia, Southern Europe, and South America. It has mild rainy winters and hot dry summers. The annual rainfall is about 12-24 inches. In this climate, vegetation such as tall bushes and small trees with dark green leaves exist. Most plants have small, hard leaves that do not fall off in the winter. The leaves are covered with a hard waxy covering, which helps them to burn in hot fire more easily. An adaptation that many plants have in the chaparral is they have an adaptation to fire, which means they actually need fire as a part of their lives. When a forest fire occurs it my kill of more branches but new sprouts and plants grow from the burnt forest. The varieties of the flora are California Lilacs, Scrub Oak, Toyon or

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