Study Material | Test Series
Drishti IAS
call1800-121-6260 / 011-47532596
Drishti The Vision Foundation
(A unit of VDK Eduventures Pvt. Ltd.)
prelims Test Series 2019
बेसिक इंग्लिश का दूसरा सत्र (कक्षा प्रारंभ : 22 अक्तूबर, शाम 3:30 से 5:30)
Arctic Ice Melting: Marine Mammals Future Uncertain
Mar 21, 2015

A first-ever effort to gauge the ecological status of marine mammals living in the Arctic has been revealed. For Arctic marine mammals, the future is uncertain. The University of Washington study, assessing the status of all circumpolar species and subpopulations of Arctic marine mammals, including seals, whales and polar bears, underscores the precarious state of those mammals and outlines the current state of knowledge and their recommendations for the conservation of these animals over the 21st century.

  • Loss of sea ice and warming temperatures are shifting already fragile Northern ecosystems.

  • These species are not only icons of climate change, but they are indicators of ecosystem health, and key resources for humans.

  • The overall numbers and trends due to climate change are unknown for most of the 78 populations of marine mammals included in the report: beluga, narwhal and bowhead whales; ringed, bearded, spotted, ribbon, harp and hooded seals; walruses; and polar bears.

  • Accurate scientific data, currently lacking for many species, will be a key to making informed and efficient decisions about the conservation challenges and tradeoffs in the 21st century.

  • The species most at risk from the changes are polar bears and ice-associated seals. These animals require sea ice to find food, find mates and reproduce, to rear their young. It's their platform of life.

  • Whales may actually benefit from less ice cover, at least initially, as the open water could expand their feeding habitats and increase food supplies.

  • Approximately 78 percent of the Arctic marine mammal populations, included in the study, are legally harvested for subsistence across the Arctic.

  • There's no other system in the world where top predators support human communities the ways these species do.

Among the few recommendations are maintaining and improving co-management with local and governmental entities for resources, recognizing variable population responses to climate change and incorporating those into management, improving long-term monitoring while recognizing monitoring for all species will be impossible, studying and mitigating the impacts of increasing human activities and recognizing the limits of protected species legislation.



Helpline Number : 87501 87501
To Subscribe Newsletter and Get Updates.