These marine mammals prey primarily on sea urchins, which are natural grazers of kelp. By damming streams, these rodents create ponds that slow water flow, reduce erosion, and raise water tables.
Keystone Species Examples on Islands and Their Ecological Impact
The unchecked urchins decimated the kelp forests, transforming vibrant habitats into barren "urchin barrens. These new aquatic environments become magnets for a stunning variety of life, from amphibians and reptiles to waterfowl and insects, showcasing the profound impact a single species can have on biodiversity.
These underwater jungles provide habitat and food for countless fish, invertebrates, and marine mammals, making the otter a fundamental pillar of this productive ecosystem. Their movement through the landscape helps to recycle nutrients and create pathways for smaller animals.
Keystone Species Examples on Islands and Their Ecological Impact
By preying on elk, wolves modified the herbivores' grazing behavior, allowing overbrowsed vegetation like willow and aspen to recover. These architects of ecological stability are known as keystone species, and their presence dictates the structure and function of entire communities.
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