Taxonomic Diversity Gradients of Ectoprocts and Bivalves and Their Geologic Implications

Research Article| December 01, 1970 Taxonomic Diversity Gradients of Ectoprocts and Bivalves and Their Geologic Implications THOMAS J. M SCHOPF THOMAS J. M SCHOPF Department of the Geophysical Sciences, University of Chicago, Chicago, Illinois 60637 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1970) 81 (12): 3765–3768. https://doi.org/10.1130/0016-7606(1970)81[3765:TDGOEA]2.0.CO;2 Article history received: 23 Jul 1970 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation THOMAS J. M SCHOPF; Taxonomic Diversity Gradients of Ectoprocts and Bivalves and Their Geologic Implications. GSA Bulletin 1970;; 81 (12): 3765–3768. doi: https://doi.org/10.1130/0016-7606(1970)81[3765:TDGOEA]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Important attributes of some taxonomic diversity gradients of marine organisms include an "ocean effect" and a "margin effect." As examples of the former, both ectoprocts and bivalves are twice as diverse in the Pacific Ocean as in the Atlantic Ocean. As examples of the latter, bivalves and, less clearly, ectoprocts have their greatest within-ocean diversity along the western margin of the Pacific and the eastern margin of the Atlantic Ocean. Correct determination of the paleo-equator may be severely hampered unless the data include samples from the Pacific Basin. Although ectoprocts and bivalves are equally diverse at low latitudes, ectoprocts have markedly more species per geographic area at high latitudes. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.