ecosystem comparison project

by: andres flores and patrick knox

tropical oceans

abiotic factors: sand dirt rocks and the surrounding water that makes up the ocean

biotic factors: fish, crabs, sharks, seaweed, shrimp, and other sea creatures.

limiting factors and carrying capacity

Limiting factors: some factors of the ocean that are considered limiting factors are the lack of space and lack of food because of the large populations of fish that live in the tropical oceans. also the tropical in tropical oceans affects the reefs and some fish.

carrying capacity: the tropical ocean may seem large but some fish have a difficult time finding homes and safe places from predators.

variations tolerances and adaptations

variations: different colors and species of fish that give them a sense of seperation from being confused with other species.

tolerences: the organisms that live in the tropical have to tolerate the heat of the sun and be strong swimmers to the currents.

adaptations: to have gills or strong breathing organs very water resisting skin.

Three symbiotic relationships

preadator prey: sharks eat fish in a hunt

mutualism: the sucker fish help by riding the parastitic fish on larger organisms

parasitism: the sucker fish feeding off the larger organisms.

The Desert!

Deserts can be seen as the complete opposite of Oceans, but the creatures can have equally surprising adaptations!

Limiting factors

As you may guess, there's a lot of limiting factors in Deserts.
  • the lack of major water sources
  • Intense temperature differences from Day to Night
  • Constantly shifting landscape

(A)biotic factors

  • Climate
  • Water
  • Landscape
  • Plants
  • Ground Animals
  • Sky Animals


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The Pyxie Frog lives in sub-Saharan Africa, which is notoriously dry, so to stay alive it burrows itself in the ground and secretes Mucus and hibernates in the Mucus-Sack for years at a time.
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Aloe vera plants, like all succulents, have developed more plump and fleshy leaves, stems, and roots. This is to help them retain more water in the arid climate they live in.
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Sidewinder Rattlesnake in the Wild

Namib Desert Viper

The Namib desert viper, unsurprisingly, lives in the namib desert! It has developed a strange kind of slithering, it's almost horizontal so no more that two parts of it's body are touching the hot desert sands at any time.

Three Symbiotic Relationships (in the desert)

  • Mutualism - Desert bats eat the nectar of flowering plants and spread their polen

  • Commensualism - Gopher Snakes use abandoned rodent-made holes as their homes

  • Parasitism - Flea sucks the blood from a Coyote, potentially exposing it to illnesses