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Nest finds 76 new red tree vole nest sites in the Pickett West timber sale

August 6, 2017

The Pickett West Forest Management Project is a massive timber sale and fuel reduction project planned by the Grants Pass BLM. The planning area stretches across 200,000 acres, from North Applegate and Murphy, to Wilderville, Selma, and north through the Hellgate Canyon Recreation Area, to Galice and Graves Creek on the Rogue River. Numerous important wildlands are found within the planning area, including Kerby Peak, Round Top Mountain and tributaries of the Wild and Scenic Rogue River.

The BLM is proposing regeneration logging in some areas. Similar to clearcut logging, the purpose of regeneration logging is to remove the current overstory canopy in stands over 150 years old and regenerate a young plantation-like stand. The practice badly damages habitat values while drastically increasing fuel hazards. (information taken from http://www.applegateneighborhood.net/pickettwest-timber-sale/)

Nest surveyed in a fair amount of the units in each of the geographical locations, with a emphasis on the units located near Selma, OR.  This timber sale includes units that NEST had previously surveyed back in 2006.  Some of the units had been previously surveyed by contractors in 2006 and 2000.

This time around the BLM did an even less than adequate job at locating tree vole nests (than in 2006) because of the way in which the BLM biologist and the government contractor interpreted and implemented the survey protocol.   There were numerous flaws to their implementation of the survey protocol that lead to a gross under representation of the quantity of tree vole nest sites in most of the project area.  Their biggest flaws were that they excluded climbing individual habitat trees without visible nests (selecting remnants for individual tree examination),  that they choose not to re-climb previously discovered nest trees from 2000 and 2006, and they did not conduct 100m searches around active tree vole nests following the 2012 tree vole survey protocol.

Ground-based surveys can only detect lower, larger visible nests in mixed age stands (including those with legacy trees). Using ground based surveys without selecting habitat trees for individual tree examination resulted in an underestimation of tree vole nests in the project area. Northwest Ecosystem Survey Team’s surveys data dating back to 2001 and research done on the red tree vole has shown that relying on ground based surveys in stands with legacy trees leads to an underestimation of active tree vole nests. In the Pickett West Project NEST’s surveys identified 62 red tree vole nests in trees that were not visible from the ground (out of 77 total nest trees found). These nests, not visible from the ground,  are often in the broken tops, in dead limb cavities, or too small or high up to be seen from the ground. A tree vole nest can be as small as the size of a fist or as large as a few feet in diameter. A small nest on top of a branch or a medium sized nest in the upper third of the canopy usually cannot be seen from the ground. The nests in broken top cavities are often large multi-generational nests. Cavity nests that are less likely to be predated because cavity nests provide more protection than nests out on branches. These cavity nests are also well protected against the elements so often there will be a multitude of layers created by each successive generation. Cavity nests are likely to be important to the persistence of a given tree vole population at the local level.

Our results from surveys dating back to 2001 are in agreement with leading tree vole researcher, James Swingle’s (2005) statements that “-Comparisons of nests located by visual searches from the ground versus nests located by following radiocollared voles indicated that many active nests could not be seen from the ground, and that nests located by visual searches were biased towards large nests” and “Our results also indicated that a management approach based only on the protection of active nests detected during ground based surveys will result in the destruction of large numbers of nests not detectable from the ground.”  Despite providing evidence to the BLM about the flawed implementation of the survey protocol back in 2006 (The BLM biologist was provided a copy of the paper published by Swingle) , then a reminder of it in 2014,  The BLM still instructed the ground surveyor to only select nests visible from the ground.  Sometimes the surveyor would select very unlikely trees like a sugar pine without connecting douglas firs  (there is no evidence that tree voles come to the ground to forage) or an obvious squirrel nest in a small tree that wasn’t even inside the unit (when there were numerous old growth, structurally complex, remnant trees available for selection inside the unit).  Take a look at the pictures below, which tree would you select, the small tree outside the unit, across the road in a previously thinned stand?  Or the structurally complex old growth remnant with a dead top that has cavities? Smallvisnesttree2.png

RemantBlogtree

In the above photo in the close up of the tree from the ground, you can see white transect flagging.  This indicates that the ground surveyor had to pass by the remnant tree where NEST surveyors located an active tree vole nest. The ground surveyor definitely saw this tree, but chose not to mark it and instead he marked the small tree outside the unit.  This is not an outlier.  The ground surveyor consistently skipped over high quality structurally complex trees while marking smaller trees that had visible nests in their lower 3rd of their canopy.

Another serious flaw that lead to gross under representation of the active tree vole colonies present in the Pickett West timber Sale was the BLM’s decision to not re-survey red tree vole nest trees that were discovered in 2000 and 2006.  NEST climbers re-climbed trees that were climbed in 2006 and found that there was still tree vole activity in many the trees that had previous tree vole activity.  One surveyor re-climbed trees in unit 3-5 (previously known as unit 3-1 and part of the Anderson West Timber Sale) that had tree vole nests in 2000 and/or 2006. On 20 May 2017 that climber resurveyed 3 legacy trees that had tree vole nests in 2006. In 2006, Northwest Ecosystem Survey team surveyors selected these trees because of their complex structure, including cavities. All 3 trees had evidence of tree vole activity, 2 had red tree vole nests (1 very recent active and one with mixed evidence, possibly active but was labeled inactive) .  One of those 3 nest trees is a large diameter legacy old-growth tree with very large diameter branches, some of which were dead. The climber found several cavity nests in the dead branches, one of which had fresh green cuttings. In the second nest tree the nest climber located a tree vole nest with some desiccated cuttings and yellow ducts. For the last of those 3 trees re-climbed on that day the surveyor could only find tan resin ducts on branches, but no nests. Tree vole nests trees in such trees would not be located by relying on ground based surveys. These re-surveys of trees containing previously discovered nests confirms the logic in the survey protocol that protects inactive nests because they are likely to be re-occupied.  It also shows that the BLM should have ordered re-climbs of all trees that had shown red tree vole activity in the past.

The survey protocol gives protection to inactive nests on the basis that tree vole nests are often re-occupied by other red tree voles. Therefore all inactive nests within 100m of an active nest are included in the same habitat buffer. If old nests are often re-occupied, then it makes sense that if a biologist truly wanted to know the extent of a red tree vole colony they would re-climb all trees with tree vole activity in the past. The reason given by the BLM biologists why they don’t re-climb trees is that they believe that the ground surveyors will discover any re-occupation. This is flawed logic because in 2006, the contractors working for Steve Holmes Forestry who had the contract in 2006 selected remnant trees without visible nests. Also in 2006, Northwest Ecosystem Survey Team, discovered over 30 red tree vole nests in unit 3-5 (previously known as 3-1 in the Anderson West timber sale) that were not considered by the Bureau of Land Management nor detected by the contract ground surveyors. Most of these nest trees in which NEST located tree vole nests were old-growth legacy trees without visible nests. The red tree vole survey has been re-written to include guidance on single-tree surveys. NEST argues that re-occupation of red tree vole nest trees located in legacy trees will not be discovered using only ground-based surveys.  The BLM biologist believes that he can ignore the past surveys and that his approach of sending in a ground surveyor to only mark trees with visible nests will be enough to locate tree vole colonies, but NEST’s recent discovery of 62 nests that were not visible from the ground illustrates just how flawed that idea is.

One of the last major flaws that lead to the under representation of how many tree voles there are in the Pickett West project area is the fact that the BLM biologist did not do any 100 meter searches around known tree vole nest trees.  100m searches are a more intensive search around a nest tree in order to find out the extent of a tree vole colony.  Normally, biologists order 100m searches around trees because the initial ground survey,as designed, only covers 80% of the unit.  So 100m searches often locate more potential trees for climbing and can lead to more tree vole nests being found. The BLM biologist did not have the contract climber do any 100m searches thereby greatly limiting the number of nest trees found.  This, coupled with not selecting quality habitat trees, severely crippled the survey effort.
The BLM biologist may think that his ground surveys and subsequent climbs were enough to “survey to protocol” but NEST doesn’t agree that the project site was surveyed to protocol due to the numerous flaws outlined above,  the biggest one being not surveying old growth remnant trees without visible nests. The current survey protocol gives guidelines for biologists to do individual tree examination or sampling . The protocol itself states ”The primary objective of the protocol is to determine the presence of active red tree vole nests.” The protocol recognizes that some old-growth conifer stands have conditions that make it exceptionally difficult to detect red tree vole nests from the ground. Many of the stands in the Pickett West Timber Sale have conditions that would make it extremely difficult to determine the presence of active red tree vole nests without doing some type of sampling. The perfect trees for sampling are old-growth legacy trees. Many units in the Pickett West Timber Sale contain very tall old-growth legacy trees with an under-story of younger more densely packed trees. It’s almost impossible to see into these legacy trees and the current protocol gives advice on what trees to select for sampling “ trees to be climbed or examined should include trees with large limbs, defects, cavities, broken tops, mistletoe brooms, or other features that may provide for stable nest structures.” NEST surveyors have told the Bureau of Land management biologist this on several occasions, dating back to 2006. Most wildlife biologists that work for the Bureau of Land Management or the United States Forest Service will select remnant trees in stands where they exist (or instruct the ground surveyors to do so). In fact, so many are doing so, that often NEST will not need to go to sales where such biologists have done the surveys because they already surveyed the trees that NEST surveyors would have selected for climbing (unlike in the Pickett West project where the BLM ignored some of the best habitat and selected a lot of unlikely nest trees just because they had a visible arboreal structure).
The method that NEST uses, that of climbing old-growth legacy trees in stands that contain a younger forest with legacy trees has shown that the ground surveyor is missing a disproportionate amount of red tree vole nests. This and research done by the leading experts in tree vole ecology has shown that only climbing visible nests from the ground to determine red tree vole colonization is flawed and unscientific. NEST believes that there are a few things the BLM can do in the Pickett West timber sale to rectify the inadequate survey for tree voles in the project area:

1. Accept and verify the data submitted by Northwest Ecosystem Survey Team and use it to create new habitat buffers and when appropriate add to habitat buffers already created.
2. Conduct 100m searches around ALL red tree vole nest trees and select and give precedence to climbing remnants even if they don’t have visible nests. Preferably these 100m searches would be performed by a competent surveyor who is capable of identifying such habitat trees and able to climb them to the top (climbing to the top is very important because research has shown that most tree vole nests exist in the upper 3rd of the canopy, not the lower 3rd).

Just doing these two suggestions would do a lot to remedy the gross under-representation of tree vole colonies present in the Pickett West Timber Sale. However, since NEST was not able to go to every single unit proposed in the Pickett West project we feel that there should be a 2nd survey effort to identify units that contain old growth remnants and then climb a certain percentage of them (giving priority to the most structurally complex ones, like those with broken tops, dead tops and ones likely to have cavities). Until then, the BLM’s survey effort should be considered flawed and not accurate enough to allow for the Pickett West project to continue on as planned.

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NEST survey season for 2017 has begun! From May to October, Come climb with us.

May 17, 2017

redtreevole

Can you find the tree vole in this picture?

Please contact us if you would like to survey.  This year’s season has started early and is likely to go well into the fall.   There may be periods where we are not in the field.  entrance to red tree vole nest

Close up of a red tree vole nest’s entrance.  You can really make out the resins ducts.

NEST surveyors efforts lead to the preservation of about 27 acres of red tree vole habitat in the Lang Dam timber sale.

March 20, 2017

Lang Dam is located near Cougar Hot Springs in the McKenzie Ranger district.   Nest surveyors spent roughly a week surveying the two units of the timber sale that had decent red tree vole habitat.  We found 12 nests and the Forest Service accepted our data and used our information to create red tree vole habitat buffers.  Below is a map of the habitat buffers that were created by the U.S.F.S. biologist who is working on the Lang Dam project.  Red tree vole buffer lang dam

Below is a picture of one of the nests found at Land Dam.  It was a nest inside the cavity of an old growth tree.  Units 210 and 220 were a mix of old growth remnant trees (trees that survived a catastrophic event such as fire or disease leading them to be significantly  older than the rest of the trees in the stand)  and younger forest, possibly 80-100 years old.  Those two units had older forest with remnants.  Red tree vole nest lang dam

Below is a picture of the nest that is inside the cavity pictured above:

red tree vole nest LD

NEST surveying getting started soon ! Tentative start time is end of June.

June 1, 2015

Contact us about your availabilities:  nestcascadia@gmail.com

We will be surveying all summer and into the fall.

View from unit 20 of Green Mountain

View from unit 20 of Green Mountain (click to enlarge).  Unit 20 will likely be dropped thanks to NEST’s efforts last year.  Come be a part of summer 2015 NEST season

Natural History of Red Tree Voles in Oregon – Discovering Wildlife Lecture Series

June 1, 2015

A great lecture on the natural history of the red tree vole with some great wildlife cam footage of the red tree vole foraging.

Comments on the Quartz Integrated Project are due Sept 26!

September 19, 2014
QPTreetopViewUnit4

Treetop View from Unit 4 of Quartz Project

 The Quartz Integrated Project is an 8,331 acre project area, located 22 miles southeast of the town of Cottage Grove – about a one hour drive away from Eugene. It is on publically owned US Forest service land, managed by the Cottage Grove Ranger District of the Umpqua National Forest. This project area is in the Sharps Creek Watershed, which drains into the Dorena Reservoir. It is a well trafficked area for recreation, hiking, water sports, and other outdoor activities.

The preferred alternative of the USFS seeks to commercially thin 1,026 acres of forest. Some of these units are younger stands of 60-80 year old trees. However, as well as being intact and recovering ecosystems, many of the units contain stands aged 100 years or older. Many of these older stands contain old growth remnant trees.

Besides being valuable unto themselves, these remnant old growth areas are a prime habitat for the red tree vole – a Survey & Manage species,

Enterance to an active red tree vole nest, documented in Unit 20

Entrance to an active red tree vole nest in Unit 20

under the Northwest Forest Plan. According to the Quartz Project EA, only 13 trees were climbed to search for red tree voles. We believe there are many, many more occupied red tree vole habitat areas in the Quartz Project area. As of Sept 19, NEST has found and documented more than 30 red tree vole nests, within the Quartz Integrated Project. None of these areas have received protection under the preferred alternative (Alternative 2).

NEST urges supporters to submit comments regarding the Quartz Integrated Project. The area is located very near to Eugene – an easy location to visit, if people are interested in making a short trip. Of the three proposed alternatives, Alternative 1 – No Action – is our preferred alternative. We also ask that folks request that the area be thoroughly surveyed for red tree voles (a rare species that receives required habitat protection, under the USFS’ own survey & manage guidelines) and that citizen nest survey data – found by experienced NEST volunteer surveyors – be accepted.

To read the USFS’s Environmental Assessment (released August 2014) regarding the Quartz Project, please review this document.

To read the USFS’s Scoping Document (released Novemnber 2013) regarding the Quartz Project, please review this document.

Please send all comments (postmarked by the Sept 26, 2014 deadline) regarding the Quartz Integrated Project to:

Joseph Linn, District Ranger

Cottage Grove Ranger District

78405 Cedar Park Road

Cottage Grove, OR 97424

NEST finds 17 red tree vole nests in unit 40 of the Green Mountain timber sale!

July 31, 2014

Deadbranchcavity NEST has found 17 red tree vole nests in unit 40 of the Green Mountain project (timber sale).  3 of these nests were nests that the contract climbers didn’t find in their trees (or the tree vole recolonized the tree after they had climbed it because they had only found “inactive” nests in the tree and we found fresh green resin ducts and cuttings).  Pictured above is a nest in a huge old growth remnant tree that the ground surveyors and contract climbers missed.unit40colorcirclesNbuffers This is the map of unit 40. There are 17 circles representing 17 RTV nests located by NEST volunteers.   Each circle represents a 150′ radius around the tree, a minimum average tree length radius around the tree.  The red circles are trees we believe to definitely contain active red tree vole nests.  The yellow circles are inactives, and the pink are trees that could be labeled either way depending on the biologists subjective judgment of whether or not the resin ducts in those particular nests are “green” enough to be labeled active. There are potentially two buffers: one containing 15 or 11 nests, and another buffer containing 1 nest.  There could be one big buffer compromising the whole unit, but if they want to maximize timber output and follow the bare minimum of the management guidelines then they would draw 2.  Following the management guidelines the everything behind the black lines should be buffered from any ground disturbing activity.  The only discrepancy would be the 4 nests inactive nests in the southwest corner of the unit.  They wouldn’t have to be included in a buffer because, technically, they are too far from an active tree vole nest (according to the management guidelines any inactive that is 100m from an active nest is to be included in the habitat buffer).  If the biologist is not looking to protect these 4 inactives, then the brown line diverging from the black line would indicate the buffer zone.   The buffer with one nest tree will most likely have its buffer drawn outside of the unit (and across the road) in a forest that looks like it must have been thinned, if that forest is still considered “suitable habitat”.  If not then they would have to completely buffer out unit 40.  At any rate, it looks like even given the situation of the minimum amount of buffers provided for, there is about a 15 to18 acre reduction in unit 40, which is about 25 acres. IMGP0414Also of interest in unit 40 is the spotted owl seen in the photo.  He/she spent two days with the NEST surveyors in unit 40, basically hanging out while we climbed trees. Still to come is the results for unit 41, about a 10 acre unit.  We have already found 4 red tree vole nests, 3 of which are active.