UBC Archives Audio Recordings Collection

[In his own voice: recordings of a series of lectures by Dr. Vladimir J. Krajina on the Biogeoclimatic… Krajina, Vladimir J. 1975-09-01

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00:35 – Krajina talks generally about biogeoclimatic zones. He comments that quantitative studies work better for habitats within zones, but not so well at the scale of entire zones. He mentions the PhD theses he has directed, 32 graduate students in total (some are MSc). 02:30 – comments on the semi-arid region in BC. There is no “arid” climate in BC. 03:40 – mention of BSk semi-arid climate (Kὂppen). 04:25 – Kamloops receives 10.16“ precipitation 05:00 – Ecological Reserves, BC has 65 of these. Open to small groups for non-destructive observations. 06:30 – 0.5% of the land area in BC is the target 07:00 – comments on the value of Ecological Reserves 07:58 – Krajina explains quantitative formula he uses to separate climatic regions. Example: total annual temp x 0.44 x 12.18” precip separates semi-arid from microthermal climates (10.16 < 12.18). [Question from students indicate some confusion over calculations – Krajina apologizes and states that final answer is correct]. 15:50 – the above formula helps distinguish semi-arid climate regions 17:10 – Oliver and Lytton both have Dsa climate (Kὂppen). Expect “steppe” vegetation. Sagebrush occurs on alkaline soils.  Osoyoos has more precipitation and is cooler (not semi-arid). 19:00 – Sagebrush occurs on alkaline soils. Purshia tridentata occurs on slightly acidic soils, e.g. pumice sand as in Oregon. Pinus contorta is (surprisingly) shade tolerant here. 20:40 – Savanna forests in coastal Nanaimo – Krajina reminisces about seeing these 25 years ago. Douglas fir is shade tolerant. [he rants briefly on the “doubting Thomases” about his ideas]. 22:50 – Krajina talks about first coming to BC.  He says he was an autecologist when, ”ecology was a dirty word” (with humour).  Some Forestry teachers said trees have no choice…”they grow where they are forced to grow.” Krajina tried to explain that trees “operate as functions” – each species deserves to be studied separately. These are very complex functions! Need to study trees in their natural communities. 25:30 – Mesothermal climate: Coastal Douglas Fir zone gets 25”-60” annual precipitation. 60”-65” is transition to Coastal Western Hemlock zone. 27:30 – Henderson Lake gets 262” (laughter, Krajina jokes). Ocean Falls gets 170”. 28:20 – Tofino gets 115” (or 150”?; distinction not clear on tape). [Krajina jokes again and talks about how he likes jokes] 29:40 – melanization in seepage habitats [K does not explain term] 30:00 – Tofino area shows effect of ocean spray. 31:50 – talks about difference between CDF and CWH. Douglas fir can grow very well in parts of CWH but does not reproduce. 33:00 – nature is not linear, has 100s of dimensions! Krajina talks about limitations of his own 2-D grids (referring to his edatopic diagrams for tree growth in relation to soil moisture and nutrients). 34:50 – kaolinization (weathering of clay to form new minerals). Very prominent in CDF. Kaolinization is counteracted by podsolinization in high precipitation areas in CWH. 36:00 – “clay disintegration”.  Mor formation, common in CWH. 38:00 – Canadian Soil Classification – Krajina recommends students look at this. 38:40 – [start pictures] Interior lakes. Small lake, concentrated minerals. Krajina uses terms “solonchak” and “solonyetz” (eastern European terms) to describe alkaline soils. Solonchak soils have high calcium and magnesium (Ca & Mg) levels; solonyetz soils have high sodium (Na=natrium). Sueda erecta and Distichlis stricta are found on solonyetz soils. 41:50 – Salicornia rubra 43:50 – [back to coastal] CDF occurs in rainshadow of Vancouver Island mountains.   45:00 – CDF has two subzones: <40” precip, and 40”-60”. Krajina talks about hemlock and cedar growth in CDF. Abies grandis (on rich soils), Picea sitchensis, Pinus contorta (missing on richer soils), Arbutus menziesii (prefers poorer soils), Quercus garryana (on richer soils). 49:00 – [Krajina rants: We need 300 year old stands! Jokes that he hopes he has brainwashed students] 50:00 – talks about a 1600 yr old Douglas fir tree he tried to save 51:30 – hemlock over 1000 yr old (older than reported in literature) 52:00 – skunk cabbage sites (K digresses about various trees) 53:20 – K apologizes for being out of time 54:45 – expresses his pleasure for being able to talk to students. Makes case for preserving old trees in Nimpkish Lake area. Continues discussion with student. Voice chatter in background re upcoming weekend field trip. 62:06 – tape ends


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