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Unformatted text preview: ) Pyke’s censuses repeated
by U of T ROP399 students, 2006 7 Replicate the bee community along the
altitudinal transect. Ljubica Lukic
Kieran Samuk in both transects, there has been a shift to the
right. You have to go up the mountain to
observe shift. Fraction of long-tongued bumble bees 1.2
0.8 2007 B. appositus
2007 B. kirbyellus 0.6
0.4 SHIFT 1974 B. appositus
1974 B. kirbyellus 0.2
2908 2924 2948 2994 3074 3141 3177 3252
Elevation (m) along Gothic Road Transect 8 4/3/2013 Magnitudes of upward shifts
Gothic Road Long tongued
100 Short tongued
200 Schofield 0 >350 Bellview 150 >400 Washington
Gulch >200 >200 How important is a shift of 250 m? Recall
altitude latitude conversion from BIO120
• Roughly, 100 m altitude = 300 km latitude What is the magnitude of such a shift?
Enormous, directional shift in distribution of
species. These date don't prove that it's
climate change behind this (but climate
change is the obvious suspect). • So, ~250 m shift equivalent to ~800 km shift Are these changes general?
Climate Warms on a cont...
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- Winter '14
- Annotated Lecture S