Alaska Climate Webinar Announcement - Climate Change Research on the Copper River Delta

2 October 2013

Alaska Climate Webinar Announcement
Climate Change Research on the Copper River Delta: The Emerging Effect
of Local Variation
Alaska Center for Climate Assessment and Policy (ACCAP)

Speaker: Gordon Reeves, Research Fish Biologist at the Pacific Northwest
Research Station, U.S. Forest Service

Tuesday, 8 October 2013
10:00-11:00 a.m. AKDT

To register for the webinar, please fill out the form available at:

The Alaska Center for Climate Assessment and Policy (ACCAP) will host a
webinar titled "Climate Change Research on the Copper River Delta: The
Emerging Effect of Local Variation" on Tuesday, 8 October 2013 from
10:00 to 11:00 a.m. AKDT. The webinar will be presented by Gordon
Reeves, a research fish biologist for the US Forest Service at the
Pacific Northwest Research Station.

There are two areas of emphasis: (1) the timing of emergence of aquatic
invertebrates in ponds across the entire Delta; and (2) variation in
thermal regimes among streams and the associated salmon populations on
the Delta. Work in 2010 showed a strong relation between the timing and
emergence of aquatic invertebrates, primarily caddisflies and Odonates
(dragonflies and damselflies), and the nesting of rusty blackbirds and
the fledging of their young. Warmer winters resulting from climate
change could decouple the synchronization of these events and have
consequences to the nesting success of the blackbirds and other bird
species that depend on the invertebrates for food and energy during
reproduction. Preliminary results show that there is a wide variation in
the timing of emergence of aquatic invertebrates--emergence was 3-5
weeks later on the cooler east Delta compared to the warmer west Delta.
We also identified three general patterns of water temperature in
streams on the Delta based on monitoring air temperatures and water
temperatures in the water column and in the subsurface environment. This
variation suggests that the response of aquatic organisms (including
salmon) to climate change will likely vary widely across the Delta, and
that this local variation could mitigate the potential impacts.

To register for the webinar and to read a full abstract, please go to:

For further information on the ACCAP Alaska Climate webinars, please go

For questions, please contact:
Tina Buxbaum
Phone: 907-474-7812

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