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David Bakker

Canadian Orienteer, Mapper, UBCO BioChemistry Student

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David Bakker

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Posted June 23, 2019 David

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Recent Posts

  • Okanagan Adventure Running Tournament
  • Sprint Camp 2018 – Part 1
  • Refocusing
  • Helsinki Part 2
  • Helsinki – A(n In)Complete Guide Map (Based on a 6 Hour Walk)

My Instagram!

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Instagram post 2048099648335554078_3552887352 Spot the spider.

Stinky Lake, #Whitehorse, #Yukon
Instagram post 2033153017643391509_3552887352 Walk in the woods for long enough, and you'll see something amazing. #explorebc
Instagram post 1972954514094084197_3552887352 Image for post 1972954514094084197_3552887352
Instagram post 1965695724705659361_3552887352 Getting up above the clouds. #valleycloudsucks
Instagram post 1946988392203268780_3552887352 Epic New Year's Eve snowshoe up Mount Ida (1000m climb, 12km) with an even better group! #snowshoeing #explorebc #shuswap
Instagram post 1911446955399332004_3552887352 Get outside. Go somewhere new. It's worth it. 
#explorebc #orienteering
Instagram post 1889589722110422287_3552887352 2.5 hour run up McDougal Rim to 1400m with @alexandre.corbett Everything frozen solid up there. #winteriscoming
Instagram post 1869919060454009587_3552887352 Image for post 1869919060454009587_3552887352
Instagram post 1833822949050466965_3552887352 A frog chilling in the woods outside Revelstoke. I mean, it's well above 30 degrees out, he deserves a bit if a break.
Instagram post 1811476411922238195_3552887352 These fascinating patterns in the inside of a piece of Douglas fir bark stew caused by a parasitic beetle that generally results in large amounts of deadfall. Here is the description of the insect by the BC government. 
Douglas-Fir Beetle

The Douglas-fir beetle (Dendroctonus pseudotsugae) is the principal killer of mature Douglas-fir in B.C. It usually attacks weakened or dying trees, but occasionally its populations increase to the extent that it infests and kills large numbers of healthy trees. Aerial overview surveys recorded 47,628 hectares of damage in 2015.

This beetle is most common in B.C.'s Interior. Though it can be found in coastal forests, it rarely causes the large-scale damage seen inland.

It attacks its host in early summer. The beetle usually attacks weakened trees (e.g., drought or wildfire damage) or trees blown down by windstorms. When it attacks healthy trees, it targets the largest and oldest first — those most valued as wildlife habitat, particularly for mule deer winter range.

Description 
Adult Douglas-fir beetles are dark brown to black with reddish wing covers, and are tiny (about 4.4 to 7 millimetres long). The life cycle is usually one year, and two broods may be produced.

Distribution

Native to North America, this insect is found throughout the range of the Douglas-fir, its principal host.

Management

Strategy depends on infestation size, stand susceptibility and other factors. Detection involves walkthroughs, probes and star probes (a type of ground probe). Treatment can involve sanitation harvesting, trap trees and other techniques.

Tree Species Attacked 
Large diameter, mature Douglas-fir trees are attacked; also, occasionally, downed western larch. Trees are killed when the flow of food and water between roots and needles is blocked by feeding larvae and by dead sapwood cells killed by the blue-stain fungi carried by the Douglas-fir beetle adults.
Damage Symptoms

Recently attacked trees are difficult to identify except for reddish brown boring dust that may accumulate on the trunk and in bark crevices. Foliage of killed trees turns from green to pale yellow-green to red by the spring of the year following the attack
Instagram post 1803547812795639321_3552887352 Sun setting over the Columbia River in Revelstoke, BC. Roughly 2 hours in 44 seconds.
Instagram post 1801817876884006647_3552887352 Storm clouds over Kamloops BC.
Instagram post 1800572405162463658_3552887352 One of the last few wooden single lane bridges. This one is over the flooding Shuswap River near Mable Lake.
Instagram post 1754882710764829448_3552887352 "There are moments when all anxiety and stated toil are recalled in the infinite leisure and repose of nature." - Henry David Thoreau . . . #studybreak #examseason #getoutside
Instagram post 1752575563468756102_3552887352 Spring is here! A bit of the terrain of the upcoming #OkanaganAdventureRunningTournament Link in bio. #Kelowna #Okanagan #Orienteering
Instagram post 1741135040568861130_3552887352 When you should be studying for your organic chemistry midterm,  but decide to get a new perspective instead. Put the gopro in an interesting spot on my bike, and went out for a ride.
Instagram post 1722227946444611968_3552887352 Beautiful ski up at Kelowna Nordic today! #explorebc #xcskiing
Instagram post 1720187866162959977_3552887352 Awesome set of orienteering races down at the Vancouver Sprint Camp. Huge thanks to the organizers! .
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📷Robert Svoboda
Instagram post 1702592235580031535_3552887352 Image for post 1702592235580031535_3552887352
Instagram post 1695417764192514864_3552887352 A stressed student productions presents "Running From My Problems" (Best with sound). Beautiful day of running in Kelowna today, now I need to start dealing with these problems. #ubco #running
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