The Effects of Climate Change on Marine Mammals - PowerPoint PPT Presentation

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The Effects of Climate Change on Marine Mammals

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Title: The Effects of Climate Change on Marine Mammals


1
The Effects of Climate Change on Marine Mammals
  • Timothy J. Ragen, Ph.D.
  • U.S. Marine Mammal Commission

2
Conclusions
  • Effects - Ecological and human-related
  • Consequences - Beneficial to catastrophic
  • Options - only prevention for ecological effects
  • Subsistence cultures?
  • Climate change is not the problem

3
Marine Mammals Involved
  • Polar bear
  • Walrus
  • Bowhead whale
  • Ringed seal
  • Bearded seal
  • Narwhal
  • Beluga whale

4
Ecological Effects
5
Ecological effects
Management
Effect
6
Human Effects
7
Population status
8
Determining factors
  • Specificity or plasticity
  • Reliance on ice (avoid predators, find prey)
  • Change in ecosystem structure
  • Vulnerability to disease
  • 5) Extent to which human activities increase

9
Subsistence Cultures
  • Effects - Ecological and human-related
  • Consequences - Beneficial to catastrophic
  • Options - only prevention for ecological effects
  • Will traditions persist?
  • Climate change is not the problem

10
Is it just climate change?
  • World population 6.5 billion and counting
  • U.S. population to 420 million by 2050
  • DOT - Shipping to double 2000 2020
  • DOE - Energy demands up 71 by 2030
  • Dead Zones doubling by 2020
  • Where are we headed?

11
Is it climate change
or
is it us?
12
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