Environment Counts | Climate change sufficient to explain orchid’s northerly range expansion
Author: Geoff Zeiss – Published At: 2011-10-07 10:55 – (791 Reads)
The observed northerly expansion of the range of the orchid Nodding Ladiesâ€™-tresses, considered a species that can respond rapidly to opportunities to colonize new areas, can be explained by the observed increase of 1 degree Celsius in mean yearly temperature over the past three decades in northern Ontario.
An increase of 1 degree Celsius in mean yearly temperature over the past three decades is widespread in northern Ontario within the regions of the range extensions. This study concludes that the increase in temperature is sufficient to explain the northerly expansion of the range of Nodding Ladiesâ€™-tresses.
The study also projects that, because large areas appear to have already become available to species occurring on the southern edge of the boreal shield ecozone, by 2040 the northern limits of quick response species in this region may have expanded 300 km north of their 1980 limit.