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Why sharks and rays keep our oceans alive | Louisa Graf | TEDxDeakin Uni Melbourne
TEDx Talks· 2025-12-22 17:17
Environmental Impact & Conservation - Over one-third (33%) of all shark and ray species are threatened with extinction worldwide, equating to over 400 species [3] - Declining shark and ray populations have been linked to the functional extinction of seagrass meadows in the Indian Ocean and threaten coral reefs in Australia [4][5] - Sharks and rays play a crucial role in regulating the ocean's ecosystem and maintaining its balance [15] Research & Biodiversity - There are over 50 species of sharks and rays in Port Philip Bay, Australia, many of which are meso predators [8] - Research focuses on tracking shark and ray movements using small trackers and underwater listening stations to understand their role in the marine ecosystem [11][12] - Muscle biopsies are used to analyze the diet of sharks and rays, providing insights into their ecological roles [13] Threats & Human Impact - Overfishing is the number one threat to sharks and rays globally [17] - Shark products are present in everyday items like pet food, supplements, and skincare [17][18] - Three billion people rely on marine and coastal resources for their livelihoods, highlighting the importance of ocean conservation [15] Ocean's Role - The ocean provides 50% of the air we breathe, emphasizing the critical role of marine ecosystems [15]
Ecocentrism: Animals' Rights and Respecting Them | Chloe Kim | TEDxHAFS Youth
TEDx Talks· 2025-10-29 15:42
Core Argument - The central theme revolves around the fragile relationship between humans and nature, advocating for a shift from a human-centered (anthropocentric) to an eco-centered (ecocentric) worldview [1][2][7] - The report emphasizes that humans are interconnected with nature and should coexist with all other creatures, recognizing their intrinsic value beyond human utility [7][9] - The report argues for a change in perspective, urging humans to act as guardians and givers rather than rulers and takers in relation to the natural world [11] Supporting Evidence & Examples - The reintroduction of grey wolves to Yellowstone National Park in 1995 is presented as a case study demonstrating the positive impact of restoring ecological balance, leading to vegetation recovery, increased biodiversity, and reduced soil erosion [12][13][14] - The removal of wolves from Yellowstone in the 1920s and 30s led to an elk population explosion, overgrazing, and habitat loss, illustrating the interconnectedness of ecosystems [12][13] - The report highlights the importance of considering the impact of human actions on animals and their habitats, advocating for choices that prioritize compassion and sustainability over convenience and consumption [17] Call to Action - The report encourages individuals to adopt an ecocentric perspective, recognizing that animals have their own lives, personalities, and purposes outside of human needs [9][16] - The report urges a shift from control to respect in our relationship with nature, advocating for reverence and humility as essential for human survival and well-being [15][11] - The report calls for a daily commitment to respecting animals and nature in our homes, cities, and scientific endeavors, envisioning a future of coexistence and love for the natural world [19]