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Upcoming Events


Wednesday October 29, 12:00 pm

ACRC Brown Bag Seminar

PNW Juneau Forestry Sciences Lab Conference Room

Evaluating Shore Pine health in Southeast Alaska

Robin Mulvey, US Forest Service Region 10

Abstract:  Shore pine is an understudied subspecies of lodgepole pine that occurs in peatland bogs and fens and coastal bluffs from Alaska to California. Recent Forest Inventory Analysis (FIA) data from the U.S. Forest Service detected a significant loss of shore pine biomass in southeast Alaska, with greater losses among larger trees and no known cause. We installed 46 permanent plots at five locations to monitor shore pine health and survival. We used this plot network to evaluate the main drivers and spatial patterns of shore pine crown dieback. Mortality was higher in shore pine (13%) than associated conifers, with the exception of yellow-cedar, and 43% of pines >40cm dbh were snags. All damage agents found on shore pine within our plot network are presumed to be native, though we detected some new state records (e.g., lodgepole pine sawfly, Dendroctonus bark beetle). The most common damages detected included western gall rust, bole wounds, and Dothistroma needle blight. Generalized linear mixed models (GLMMs) were used to estimate the effect of various types of damage on crown dieback of live shore pine trees. Western gall rust bole galls were determined to be the most important predictors of crown dieback. Bole wound incidence and severity increased with shore pine tree diameter, and were significantly more common on shore pine compared to other tree species. Secondary bark beetles, beetle galleries, and associated stain fungi were detected on dying shore pine and shore pine snags. We suspect that injury from biotic agents and stressful site conditions accumulate over time, making older and larger shore pine vulnerable to secondary bark beetle attack. This project serves as a leading example of how the FIA plot system can reveal otherwise undetected changes in tree biomass, initiating directed follow-up surveys and long-term monitoring.

 


 

ACRC Fall Semester Brown Bag Lecture Series

The Alaska Coastal Rainforest Center is hosting a Brown Bag Lunchtime Lecture series during the fall semester. Talks will be on Wednesdays from noon—1pm at the new Forestry Sciences Lab adjacent to the UAS campus. The lunchtime speaker series is meant to be an informal avenue for graduate students, faculty, and professionals to present new and existing research and scholarship, brainstorm ideas, and have the opportunity to receive feedback in an informal setting.  We invite all interested persons to join us to learn about the exciting research projects and collaborations that are happening in Southeast Alaska.

Date

Presenter

Title

9/11/2014

*THURSDAY*

 

Hank Lentfer and Richard Nelson

Chasing Sounds: adventures with a recorder

9/17/2014

 

Victoria Wyllie de Echevarria,

University of Oxford

Linking interactions between cultural and biological diversity on the Pacific coast of North America in the face of climate change

9/24/2014

 

TBD

National Estuaries Week

10/1/2014

 

Roman Motyka, UAS

Taku Glacier: neoglacial history and future research

10/8/2014

 

John Neary, USFS Mendenhall Glacier Visitor Center

Adapting to climate change at the MGVC—rethinking our footprint

10/15/2014

 

NO SEMINAR

 

10/22/2014

 

NO SEMINAR

American Fisheries Society Meeting, Juneau

10/29/2014

 

Robin Mulvey, USFS

Evaluating Shore Pine health in southeast Alaska

11/5/2014

Jonas Lamb and Caroline Hassler, UAS Library

Southeast Alaska Natural Resource Collection and tour

11/12/2014

Jason Amundson, UAS

Subglacial discharge from maritime glaciers

11/19/2014

Heidi Pearson, UAS

Marine mammal research in Berners Bay

11/26/2014

THANKSGIVING—NO SEMINAR

 

12/3/2014

Sonia Ibarra, UAF School of Fisheries

Can humans and apex predators coexist? Evaluating the sustainability and resilience of rural coastal communities in Southeast Alaska






 
 

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