Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleWhy are there so many species? Spatio-temporal heterogeneity and northern bumblebee communitiesAuthorsRanta, E.; Vepsalainen, K.SubjectsEUROPEPublicationOikos, 1981, Vol 36, Issue 1, p28ISSN0030-1299Publication typeArticleDOI10.2307/3544375