Introducing
Your new presentation assistant.
Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.
Trending searches
Keystone Species = a species that is depended on by others and can cause collapse within an ecosystem if removed
Common name = Grizzly Bear
Scientific Name = Ursus arctos horribilis
- Grizzly bears previously ranged from Alaska to Mexico and as far east as Hudson Bay (past)
- Now they're found in Alaska, through much of western Canada, and into portions of the northwestern US states such as Washington, Idaho, Montana, and Wyoming (present)
- Yellowstone and Grand Teton National Parks
- There are currently about 55,000 wild grizzly bears throughout NA, most of which are found in Alaska (all bears in California were killed)
Grizzly bears can be found in woodlands, forests, alpine meadows, and prairies (near streams)
- found in lush areas where they can build dens; located near streams for salmon catching and water availability
Biotic: living things within an ecosystem
FACTORS: shrubs, trees (plants), all animals
Abiotic: nonliving things
FACTORS: air, sunlight, water, soil, rocks
Autotroph: can make their own "food" from inorganic substances (CO2)
ex. PLANTS
Heterotroph: has to consume other organisms (living/organic substances) for food
ex. humans, animals
*Grizzly bears are omnivores, meaning they eat both plants and other animals (meat)
Sun grass/seeds deer
small rodent
berries
Often portrayed as vicious creatures, Grizzly Bears are actually quite seclusive. These animals require a lot of space for setting up dens and acquiring food, so they choose to live farther from settlements.
There are the obvious 2: salmon and berries
[they catch salmon with their BEAR hands :)]
- But much of their meat comes from deer and elk
- In areas where animals are less common, bears turn to grasses, roots, bulbs, and fungi
Summer foods: thistle, mushrooms, roots, berries, and insects
Fall foods: berries, plants, and ants
- Dig dens for the winter hibernation
- Females usually give birth around then
- Typical litter size = 1-4 cubs with an average of 2
- Grizzly bears have one of the slowest reproductive rates (few cubs, lateness in life)
* Grizzly Bears are quite intelligent, curious, and have excellent memories
* "Grizzly bears may intake up to 90lbs of food each day. That’s like 360 quarter pounders from McDonalds."
* The visible hump on their backs is actually a strong muscle (dig dens)
* subspecies of the brown bear
* Can come out of hibernation to consume small amounts of food or if threatened (unlike other hibernators)
Like mentioned earlier, a keystone species is one that is depended on by others and, if removed from the ecosystem, can cause great damage and a collapse like a domino effect throughout the different species.
- disperse seeds (berries)
- stir up the soil/uproot
- hunting for food
*all 3 of these are simple things that this organism does that keeps an ecosystem together (look at next circle for more info)
Ecosystem:
- disperse seeds (berries)
*seeds stick to their fur and are transported elsewhere (manure=fertillizer)
- stir up the soil/uproot
*increases species richness & nitrogren avaiability
- hunting for food
*regulate prey populations & help prevent overgrazing
*when bears were removed from an ecosystem, their herbivorous prey multiplied and lowered the plant abundance, also lowering species numbers
Humans(?): Grizzly bears and humans don't have much of an agreeing relationship and tend to keep distance
1. “Grizzly Biology & Behavior.” Western Wildlife Outreach, westernwildlife.org/grizzly-bear-outreach-project/biology-behavior/.
2. Sartore, Joel. “Grizzly Bear.” , Facts and Photos, 1 Apr. 2020, www.nationalgeographic.com/animals/mammals/g/grizzly-bear/.
“7 Little Known Grizzly Bear Facts.” BearSmart.com, 29 Jan. 2017, www.bearsmart.com/blog/7-little-known-grizzly-bear-facts/.
“Amazing Facts about Grizzly Bears: OneKindPlanet Animal Education.” OneKindPlanet, onekindplanet.org/animal/grizzly-bear/.
https://en.wikipedia.org/wiki/Grizzly_bear (sorry I only linked this one)