| Abstract Detail
Getting everyone involved: Saving the seaside alder DUNN, MICHAEL [1]. The fossil record of the Seaside Alder, and Alnus subgenus Clethropsis. Alnus maritima (Seaside Alder) may have been widespread across North America once, but now is divided into three disjunct subspecies in Oklahoma, Georgia, and Delaware: A. maritima subsp oklahomensis, A. maritima subsp georgiensis, and A. maritima subsp maritima respectively. Arguably, A. maritima subsp oklahomensis is ancestral to the other two populations. Phenologically, A. maritima is isolated from all other North American alders by flowering in autumn rather than spring, but is united into the sub-genus Clethropsis with the disjunct species A. nitida (Himalayan Alder) from the temperate Himalayas of southeast Asia, and A. formosana (Formosan Alder) from Taiwan, based primarily on autumn flowering. Current top-down approaches have been unsuccessful in reconstructing the bio-geographical history of these disjunct species and subspecies. However, all taxa in sub-genus Clethropsis share leaf characteristics in that the leaves are all relatively narrow with small upturned teeth. Those leaf characters combined with the abundant fossil record of Alnus throughout the Cenozoic of the Northern Hemisphere suggests that a bottom-up approach may be useful in deciphering the past distribution of the Seaside Alder. This contribution to the Seaside Alder Symposium proposes to do just that by reviewing the fossil record of Alnus, specifically focusing on subgenus Clethropsis leaves. Log in to add this item to your schedule
1 - CAMERON UNIVERSITY, 2800 Gore Blvd, LAWTON, OK, 73505, USA
Keywords: Alnus subgenus Clethropsis Cenozoic seaside alder.
Presentation Type: Symposium Presentation Session: SY3, Getting everyone involved: Saving the seaside alder Location: Fort Worth Ballroom 2/Omni Hotel Date: Tuesday, June 27th, 2017 Time: 8:45 AM Number: SY3002 Abstract ID:153 Candidate for Awards:None |