Watershed

Laminated Root Rot and Nadaka Nature Park: Managing a Hidden Killer


Laminated Root Rot. Click to enlarge

Laminated Root Rot and Nadaka Nature Park

Abel Gebrezgi and Jim Labbe
Audubon Society of Portland

INTRODUCTION
Laminated root rot (LRR) is a fungal pathogen, Phellinus weirii, also known as yellowing ring rot. (LLR gets its name from the lamination of the decayed wood (see photo above). This fungus is widespread in Southern British Columbia, Washington, Oregon, northern California and western Montana.). It is one of the most damaging root diseases amongst conifers, especially firs and cedars, in the Pacific Northwest. Douglas fir, Mountain hemlock, Western hemlock, Grand fir, and Pacific silver fir are highly susceptible to infection by this pathogen. Pine species like Western white pine and Ponderosa pine and larch are more resistant to it while hardwoods are immune. The fungus was first discovered in 1914, on Western red cedar in Idaho. The first reported case in Douglas fir was in 1940, at Cowichan Lake, British Columbia.

BIOLOGY
The mycelium of LRR doesn’t grow in the soil and the spores do not spread by wind like most fungal pathogens. Infection occurs when roots of healthy trees grow in contact with infected roots.


Click to enlarge

After initial contact with a living root, the mycelium grows on the bark, extending only a few inches into the surrounding soil. The mycelium penetrates the host through the injured bark and advances along newly infected roots. Symptoms include crown yellowing and thinning, distress of cones, red-brown staining of outer heartwood, and separation of annual rings. Less discernible is the root rot which eventually decays the roots, destabilizes the tree, and leads to death and toppling. In addition to the loss of mature trees within a stand, LRR creates potential hazards from tree fall especially in small urban parks. The number of cases of the LRR disease has increased substantially with the presence of fire suppression and resulting dominance of Douglas-fir and Grand fir.

Earth Day at St Aidan's Episcopal Church: Apr 20, 2013 11AM-3PM

04/20/2013 - 11:00am
04/20/2013 - 3:00pm
Etc/GMT-8
Earth Day at St Aidan's Episcopal Church: Apr 20, 2013 11AM-3PM. Exhibits, crafts, Nadaka Nature Park tours, refreshments. Info here!

Celebrate Earth Day

Exhibits, Crafts, Tours and More

When: Sat Apr 20, 2013 11AM-3PM
Where: St Aidan's Episcopal Church
174th & NE Glisan
Get Map!

St. Aidan's Episcopal Church in Gresham, in conjunction with We Are Rockwood is holding a celebration of Earth Day on Saturday, April 20, 2013, 11AM-3PM. Events will take place in St' Aidan's Murdock Hall and on the church's park-like grounds.

Activities include environmental exhibits, crafts made from found objects for the kids, tours of Nadaka Nature Park, refreshments, and community information.

Nadaka & SOLVE® Clean-Up Event
Friends of Nadaka and SOLVE® is having a clean up day at Nadaka Nature Park on Saturday morning April 20th from 9AM-1PM. Everyone's invited to participate! Click here to register, or visit the north gate at 175th & NE Pacific St.

Volunteers Wanted, Johnson Creek 15th annual Watershed Wide restoration event: Mar 2, 2013 9AM-12PM

03/02/2013 - 9:00am
03/02/2013 - 12:00pm
Etc/GMT-8
Volunteers Wanted, Johnson Creek 15th annual Watershed Wide restoration event: Mar 2, 2013 9AM-12PM. Info here!

Rain or Shine!

When: Sat Mar 2, 2013 9AM-12PM
Where: Hogan Creek Confluence
Springwater Wetland
6430 SE 152nd Av
Portland OR
Get Map!

Get Your Green on!
Join us on Saturday, March 2nd from 9AM-12PM as Johnson Creek Watershed Council (JCWC) hosts its 15th annual Watershed Wide volunteer restoration event. Organizations, individuals, and businesses will gather for a day of ecological stewardship, spring stream-cleaning, and community-building at 12 priority restoration sites throughout the watershed. Registration required (below).

The closest site to the Wilkes East neighborhood is Hogan Creek Confluence- Springwater Wetland (meet at Gresham Operations Center, 6430 SE 152nd Ave.) –work with the City of Gresham to remove blackberry and install native plants in a wetland under restoration near the entrance of the Hogan Creek tributary.

Metro Proposes Five-Year Option Levy to Manage Public Lands. Take The Survey Here!


Columbia Slough, Portland Oregon

Our community is known for its natural beauty and commitment to protecting farms, forests and natural areas. Since 1995, our region’s voters have approved two bond measures to allow Metro to acquire natural areas to protect water quality, wildlife and outdoor recreation opportunities.

Today, Metro manages more than 16,000 acres of land – more than a third of all the public parks and natural areas in our region. By law, Metro is prohibited from using the existing voter-approved bonds for ongoing preservation and maintenance.

Metro wants your input on their recommendation.
This summer, a 15-member independent advisory panel recommended that the Metro Council take the first step in a long-term plan to protect and maintain these areas purchased with the bonds by referring a five-year local option levy to voters.

Take the survey below to learn more about the advisory panel’s recommendation and tell the Metro Council about your priorities.

Edible Weed Walk; Free Educational Event: Sat, Sep 8, 2012 10AM-12PM

09/08/2012 - 10:00am
09/08/2012 - 12:00pm
Etc/GMT-8
Edible Weed Walk; Free Educational Event: Sat, Sep 8, 2012 10AM-12PM. Find out how weeds can be used for food, craft and natural remedies. Sign-up here!

Bring A Notepad
And Join The Fun!

When: Sat Sep 8, 2012 10AM-12PM
Meet: SE 174th and Jenne Rd
Gresham, OR
Get Map!

Herbalist Randi Embree enlightens us about the “world of weeds.”

Take a short walk along the Springwater Trail learning the wonders and possibilities of edible weeds. Many weeds are used for agricultural and medicinal purposes. Take this opportunity to learn more at this free educational event. Registration required (link below).

To some plantain, dandelion, chickweed and sow-thistle are a nuisance. To others they are a delicious salad and a seasonal treat!

JCWC Science Pub Talk; Hot Fish and Cold Beer: Tue, Sep 11, 2012 6PM-8PM

09/11/2012 - 6:00pm
09/11/2012 - 8:00pm
Etc/GMT-8
JCWC Science Pub Talk; Hot Fish and Cold Beer: Tue, Sep 11, 2012 6PM-8PM. A discussion of stream temperature impacts to native fish. RSVP here!

First In A Series
of Science Pub Talks!

When: Sat Sep 8, 2012 10AM-12PM
Where: 4th Street Brewing Co
77 NE 4th Street
Gresham, OR
Get Map!

Download flyer here!

Join us for an educational evening and a cold beer.

Scientists will discuss hot watershed topics and the audience can enjoy a cool beverage at special happy hour prices sponsored by the Johnson Creek Watershed Council. RSVP requested. (link below)

Explore Johnson Creek, a little stream that flows from agricultural headwaters through the urban areas of Gresham, Portland, and Milwaukie. Join Johnson Creek Watershed Council, and partners City of Gresham and Multnomah County, to kick off our educational science pub series.

Dusk Bird Walk Linnemann Station: Jun 3, 2012 7PM-9PM

06/03/2012 - 7:00pm
06/03/2012 - 9:00pm
Etc/GMT-8
Dusk Bird Walk Linnemann Station: Jun 3, 2012 7PM-9PM. Join Portland Audubon and City of Gresham naturalists for a walk along the newest section of the Gresham-Fairview Trail. Info here!

When: Sunday Jun 3, 2012 7-9PM
Where: Linnemann Station
Springwater Corridor Trailhead
18200 W Powell Loop
Gresham OR
Get Map!

You're Invited
Join Portland Audubon and City of Gresham naturalists for a walk along the newest section of the Gresham-Fairview Trail between Division and Powell. This nighttime walk will focus on the American bitterns that breed in the large wetland just off the trail, as well as some owl calling and identification. Dozens of other songbirds and waterfowl are likely to be seen. Meet at Linnemann Station on the Springwater Trail.

No registration required.

More Info
Contact Laura Guderyahn, 503-618-2246 or Laura.Guderyahn@GreshamOregon.gov

Free, Rain Garden 101 Workshop: May 19, 2012 9AM-1PM

05/19/2012 - 9:00am
05/19/2012 - 1:00pm
Etc/GMT-8
Free, Rain Garden 101 Workshop: May 19, 2012 9AM-1PM. Info here!

Add a rain garden!

When: Sat May 19, 2012 9AM-1PM
Mt. Hood Community College
Town and Gown Room
26000 SE Stark
Gresham, OR
Get Map!

Build your own rain garden at home to help reduce water pollution and create urban habitat for birds and butterflies.

Free Workshop
This free workshop explores the role rain gardens can play in urban stream restoration, while adding beautiful landscaping to your yard. Participants will learn how to site, plan and build a rain garden. Registration is required and space is limited.

Free, Columbia Slough Tour, Explore the Life of Frogs: Apr 11, 2012 5-6PM

04/11/2012 - 5:00pm
04/11/2012 - 6:00pm
Etc/GMT-8
Free, Columbia Slough Tour, Explore the Life of Frogs: Apr 11, 2012 5-6PM. Info here!

Frogs, frogs & frogs!

When: Wed Apr 11, 2012 5PM-6PM
Where: Columbia Slough Water Quality Facility
19595 NE Sandy Blvd
Get Map!

Join the fun
Bring the whole family to a hidden wetland in Gresham in search of cold, slimy, and fun frogs.

With amphibian scientist Laura Guderyahn from the City of Gresham, learn about a frog’s life cycle and use a net to hunt for amphibians in the water.

Recommended for kids aged 4+ with their parents; pre-registration requested. $5/family suggested donation to host Columbia Slough Watershed Council.

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