By John Pastor (auth.)
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Extra info for What Should a Clever Moose Eat?: Natural History, Ecology, and The North Woods
Example text
In the beginning, no one would have come up with range expansions in perpendicular directions as a hypothesis of species migrations, but that’s what happened. It still cries out for an explanation. As Walter Tschinkel and E. O. 2 Once a hypothesis is developed, we examine it further by experimental manipulation of one or more factors. Or we develop a mathematical model to work through whether the hypothesis logically follows from its premises. Or we use the model to make predictions that can be experimentally tested.
Unfortunately, we do not know these answers for most plants. Our predictions of how nature will respond to timber harvesting, climate change, hunting and gathering, invasion by exotic species, and other factors are severely limited by not having answers to these questions. Although serendipity may put you in the right place at the right time to make a natural history observation, it does not guarantee you will ask a good question because of it. You have to be able to recognize that there is a good question lurking in the observation.
If the land is stable and the sea level is falling, then the sea level should fall down from Celsius’s original marks by the same amount at every spot along the coast. But by the late 1700s, his students found that the vertical displacement of land and sea was uneven across the Baltic. Swedish geologists then concluded that the land must be rising and taking Celsius’s original chisel marks with it at different rates in different places. Still, they did not know (yet) what was causing the land to rise.