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Andrea Cheng
Brooke Ngo-Phan
Joe Thompson
Maryah Hampton-Best

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The Desert Biome is characterized by the level of rainfall it receives (annually) and the barren landscape. An area with less than 25 centimeters of annual rainfall is considered a desert. Despite popular belief, deserts are not always scorching hot; in fact, Antarctica is considered a desert, not because of the temperature, but because of the amount of rainfall it gets. Deserts are hot in the day (except for deserts in the cold and polar regions) and are cold at night. Deserts cover approximately one-third of the Earth. There are four types of deserts (locations): subtropical, coastal, cold, and polar.

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They live short and fast lives. When it rains in the desert, seeds that have been previously dispersed absorb the moisture, germinate, and begin to grow at a rapid rate. During the short wet season, tumbleweeds grow and once the season has passed, it dies and breaks away from their roots. Once it has broken away from its roots, it tumbles through the desert scattering the seeds.

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The spines on the cacti are used to protect it from humans and animals. The roots are spread out to collect water when it rains. The water is then stored in its body for future use. For example a fully grown Saguaro cactus can soak up and store up to 200 gallons of water during a desert rainfall.

"KS2 Science - How Cacti Survive without Water." BBC Bitesize. BBC, n.d. Web. 09 Apr. 2018.

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Desert soil is usually light colored with sparse vegetative cover that varies with temperature and elevation. Desert soil can be deep, shallow, or salty.
Soils in Antarctica- the soils are very rocky and loose. The color of the soil  varies according to the age. The soils typically have low levels of carbon and nitrogen and are low in clay.
"Antarctic Soils." Manaaki Whenua - Landcare Research. N.p., n.d. Web. 09 Apr. 2018.

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They usually burrow into the sand during the day to avoid the heat, but if there is prey passing by they snap out to catch it. They have extra fat under their exoskeleton which also protect them from being crushed. Fun fact there is around 2,000 types of scorpions.  www.quora.com/How-are-scorpions-adapted-to-survive-in-the-desert.

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Since penguins live in the antarctic they have to have high body temperature; that's why they have a lot blubber (or fat) to keep the body heat. Their breaks allow them to have a good grasp on their prey. When they swim their flipper like wings allow them to go glide through the water.  “Can Penguins Live in DESERT.” The Journal of Zoology Studies, journalofzoology.blogspot.com/2014/11/can-penguins-live-in-desert.html.

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An example of this type of relationship is a cactus wren which is a type of bird creates a nest in the cactus. The cactus protects the young wren from predators, but no harm and no good comes to the cactus for this. “Mutualism, Commensalism, Parasitism, and Preator/Prey.”Desertbiome.weebly.com, thebiomedesert.weebly.com/mutualism-commensalism-parasitism-and-preatorprey.html.

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An example of this type of relationship is a woodpecker eating insects/parasites off the cactus. The cactus benefits from the woodpecker, because the parasites can harm the cactus. The woodpecker also benefits, because it gets food.

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An example of this type of relationship is between a coyote and fleas. The host is the coyote while the fleas is the parasite sucking blood from the coyote.  “Symbiotic Relationships.” Desert Biome, ekwuemedesertbiomes.weebly.com/symbiotic-relationships.html.

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Location, Temperature Range and Average Rainfall

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Location, Temperature Range and Average Rainfall

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Location: Deserts are found all over the world and on every continent. There are four types of desert biomes Sub-tropical Deserts, Coastal Deserts, Cold Deserts, and Polar Deserts.

Sub-Tropical:
Sub-tropical deserts are the most common type of desert in the world and are characterized by very hot summers and cold winters. These desert have very

little plant and animal life and even less rainfall (About 4 inches)The Temperature

ranges from almost 140 degrees Fahrenheit in the summer, to below freezing averaging around 40 degrees in the winter.

Coastal Deserts:
Coastal Deserts are classified by the cool/mild climates. They are found around large bodies of water and mountain ranges. Tough they do not look like your average deserts, they are some of the harshest regions in the world. The rainfall averages from 5 to 85 millimeters depending on the region and stays around 18 degrees Celsius year round.

Cold Deserts:
Cold deserts are usually classified by hot-dry summers and cold-dry summers. The rainfall ranges from 7-12 inches per year and around 50 degrees Fahrenheit.

Polar Deserts:
Polar Deserts are located where it says they are, at the polls. The usually only have around 10 inches of rainfall and stay below 10 degrees Celsius year round.

Cited Sources:
Ana, et al. “Deserts of the World | The 7 Continents.” The 7 Continents of the World, www.whatarethe7continents.com/deserts-of-the-world/.

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“Desert Biome Facts.” Math, www.softschools.com/facts/biomes/desert_biome_facts/167/.

Redd, Nola Taylor. “Antarctica: Facts About the Coldest Continent.” LiveScience, Purch, 18 July 2012, www.livescience.com/21677-antarctica-facts.html.

What Is a Desert?, pubs.usgs.gov/gip/deserts/what/.