Where Land and Sea Meet: Brown Bears and Sea Otters
Coletti HA , Hilderbrand G , Bodkin J , Ballachey BE , Erlenbach J , Esslinger G , Hannam M , Miller A , Mangipane B , Kloecker K , Monson D , Pister B , Griffin K , Bodkin K, Smith T . 2022. Where Land and Sea Meet: Brown Bears and Sea Otters. Frontiers for Young Minds. 10
In Katmai National Park, Alaska, USA, we have seen changes in the number of brown bears and sea otters. The number of animals of a species a habitat can support is called carrying capacity. Even though bears live on land and sea otters live in the ocean, these two mammals share coastal habitats. Bears eat salmon, other fish, plants, clams, and beached whales. Sea otters feed on clams and other marine invertebrates. All these foods are influenced by the ocean. Recently, we have seen fewer bears but more sea otters! What changed? Many things, but several observations point to the ocean. There are fewer salmon, whales, and clams, so bears rely more on plants for food. Fewer clams mean sea otters must work harder to find food. Our studies are helping us to understand how and why carrying capacity for a given species may change over time.
- Type
- Journal Article
- Authors
- Coletti, Heather; Hilderbrand, Grant; Bodkin, James; Ballachey, Brenda; Erlenbach, Joy; Esslinger, George; Hannam, Michael; Miller, Amy; Mangipane, Buck; Kloecker, Kimberly; Monson, Daniel; Pister, Benjamin; Griffin, Kelsey; Bodkin, Kelly; Smith, Tom
- Units
- KATM
- Keywords
- abundance, brown bear, ecosystem dynamics, Enhydra lutris, Gulf of Alaska, long-term monitoring, nearshore marine food web, sea otter, Ursus arctos
- Subjects
- Ecological Framework: Biological Integrity | Focal Species or Communities | Marine Communities , Ecological Framework: Biological Integrity | Focal Species or Communities | Mammals