lexi glasscock 7/ Ms. green
tundra food web
In the Tundra Food Web the herbivores who depend on the producers for survival are the Pikas, Musk Ox, Caribous Lemmings and Arctic Hares. They are the first consumers and they are found above the producers in the food pyramid. In the Tundra Food Web the carnivores who eat the herbivores are the Arctic Foxes and Brown Bears. Here the Brown Bears are Omnivores. They are the second order consumers and are found above the herbivores in a food pyramid. In the Tundra Food web Arctic Foxes are eaten by Arctic Wolves, Polar Bears, and Snowy Owls. These animals form the third order consumers. These animals are found above the second order consumers in the food pyramid. The Brown Bears are not eaten by any carnivore unless Man kills them for fur. Man is the top carnivore in the Tundra Food Web, as he kills all the animals and birds for food. He is the top of the food web.
The caribou or reindeers like to feed on lichens when the weather is at its worst or coldest, this is the only food available which can provide them and can give them energy and heat. So, when the caribou is looking for food, the arctic fox follows it. Then when the caribou digs into the ground snow looking for food, it digs up the soil and shows a little or at least brings closer to the surface some of the mammals under the snow that’s when the arctic fox shares the predator and prey relationship in the tundra. So once the caribou is done with its hunting the arctic fox follows it and digs deeper and gets its food in the type of the mammals. So, this is one example of commensalismin the tundra region where the caribou is not harmed but the arctic fox manages to get its food with some help from the caribou.
- The Polar Bear has a Mutualistic symbiotic relationship with Arctic Foxes. Commensalism is where one species benefits while the other is unaffected, arctic foxes travel behind polar bears and scavenge on scraps of food. The pole bear is hardly affected and the fox benefits from the food Polar bears are especially susceptible to the parasitic worm Trichinella, which they contract by feeding on infected seals. Trichinella larvae encyst in various parts of the polar bear's body, usually muscle tissue. If enough larvae encyst in one area, such as the heart, the tissue becomes severely damaged. Death may result. This is an example of parasatism where one species, the polar bear, is harmed while the other, the trinchinella, is benefited.
- Caribou lays their eggs, warble flies harass caribou and interfere with feeding.
- Warble fly larvae are found under the skin on the caribou’s back.
- Larvae are yellowish-white, oval grubs about 1 inch long.
- There is often swelling and fluid in nearby tissue.
- The number of warbles can range from 1 to over 1000 on each animal.