€¦ · canada. in many cases, these were anecdotal accounts, although causal re- lationships...

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Page 1: €¦ · Canada. In many cases, these were anecdotal accounts, although causal re- lationships between declines and anthro- pogenic events can be confirmed in all too many cases
Page 2: €¦ · Canada. In many cases, these were anecdotal accounts, although causal re- lationships between declines and anthro- pogenic events can be confirmed in all too many cases
Page 3: €¦ · Canada. In many cases, these were anecdotal accounts, although causal re- lationships between declines and anthro- pogenic events can be confirmed in all too many cases
Page 4: €¦ · Canada. In many cases, these were anecdotal accounts, although causal re- lationships between declines and anthro- pogenic events can be confirmed in all too many cases