![JeremyKerr,aresearcherattheUniversityofOttawainCanada,a...]( "JeremyKerr,aresearcherattheUniversityofOttawainCanada,a...")
- 问题详情：JeremyKerr,aresearcherattheUniversityofOttawainCanada,andhiscolleaguesanalyzedmorethan400,000observationsofbumblebeespeciescollectedinNorthAmericaandEuropefrom1975to2010.Whentheresearchersrecordedthelocationsofthesebeepopulations,theyfoundtha...
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