{"id":341,"date":"2015-08-05T20:24:23","date_gmt":"2015-08-05T20:24:23","guid":{"rendered":"http:\/\/sites.berry.edu\/jgraham\/?page_id=341"},"modified":"2015-08-26T12:00:52","modified_gmt":"2015-08-26T12:00:52","slug":"big-sagebrush-hybrid-zone","status":"publish","type":"page","link":"https:\/\/sites.berry.edu\/jgraham\/big-sagebrush-hybrid-zone\/","title":{"rendered":"Big Sagebrush Hybrid Zone"},"content":{"rendered":"

\u00a0<\/span>
\nBig sagebrush (Artemisia tridentata<\/i>) is the most widely distributed shrub in North America.\u00a0 There are five subspecies, and these often hybridize along environmental gradients.\u00a0 Two of these subspecies, basin big sagebrush (A. t. tridentata<\/i>) and mountain big sagebrush (A. t. vaseyana<\/i>), hybridize along elevational gradients throughout the Great Basin and Rocky Mountains.\u00a0 These hybrid zones are important laboratories for testing hybrid zone theory.<\/p>\n

The two subspecies of big sagebrush differ in morphology and terpene biochemistry.
\n\"\" \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Basin Big Sagebrush<\/p>\n

\"\" \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Mountain Big Sagebrush<\/p>\n

Basin big sagebrush grows at lower elevations.\u00a0 It usually has a single main trunk. Mountain big sagebrush grows at higher elevations.\u00a0 It generally has no single main trunk.<\/p>\n

\"\" \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Salt Creek at Basin Site<\/p>\n

\"\" Mountain Big Sagebrush on Mt. Nebo<\/p>\n

We have planted sagebrush from five populations within the hybrid zone at Salt Creek into three gardens spanning the zone (basin, hybrid, mountain).\u00a0 From this reciprocal transplant experiment at Salt Creek, we have shown that hybrids have highest fitness within the hybrid zone, which supports the bounded hybrid superiority model rather than the dynamic equilibrium or mosaic hybrid zone models.\u00a0 Additional studies of this hybrid zone include fitness (Graham et al. 1993, Wang et al. 1997), developmental stability (Freeman et al 1995), respiration and water potential (McArthur et al. 1998), soils (Wang et al. 1998), and terpene biochemistry (Byrd et al. 1999).<\/p>\n

\"\"\u00a0\u00a0\u00a0\u00a0 Reciprocal Transplant Garden in the Hybrid Zone Site
\n\"\" \u00a0\u00a0\u00a0\u00a0\u00a0 Salt Creek During a Storm<\/p>\n

References<\/p>\n

Freeman, Byrd, D. W., E. D. McArthur, H. Wang, J. H. Graham, and D. C. Freeman.\u00a0 1999. Narrow hybrid zone between two subspecies of big sagebrush (Artemisia tridentata<\/i>: Asteraceae). VIII. Spatial and temporal patterns of terpenes. Biochemical Systematics and Ecology\u00a0 27: 11-25.<\/p>\n

Freeman, D. C., J. H. Graham, D. W. Byrd, E. D. McArthur, and W. D. Turner.\u00a0 1995. Narrow hybrid zone between two subspecies of big sagebrush (Artemisia tridentata<\/i>: Asteraceae). III. Developmental instability.\u00a0 American Journal of Botany 82: 1144-1152.<\/p>\n

Freeman, D.C., W. A. Turner, E. D. McArthur, and J. H. Graham. 1991. The characterization of a narrow hybrid zone between two subspecies of Big Sagebrush (Artemisia tridentata tridentata<\/i> and A. t. vaseyana<\/i>).\u00a0 American Journal of Botany 78: 805-815.<\/p>\n

Graham, J. H., D. C. Freeman, and E. D. McArthur. 1995. Narrow hybrid zone between two subspecies of big sagebrush (Artemisia tridentata<\/i>: Asteraceae). II. Selection gradients and hybrid fitness.\u00a0 American Journal of Botany 82: 709-716.<\/p>\n

McArthur, E. D., D. C. Freeman, J. H. Graham, H. Wang, S. C. Sanderson, T. A. Monaco, B. N. Smith. 1998. Narrow hybrid zone between two subspecies of big sagebrush (Artemisia tridentata<\/i>: Asteraceae). VI. Respiration and water potential. Canadian Journal of Botany 76: 567-574. (pdf<\/span><\/a>)<\/p>\n

Wang, H. D., W. Byrd, J. L. Howard, E. D. McArthur, J. H. Graham, and D. C. Freeman. 1998. Narrow hybrid zone between two subspecies of big sagebrush (Artemisia tridentata<\/i>: Asteraceae). V. Soil\u00a0 properties. International Journal of Plant Science 159: 139-147.<\/p>\n

Wang, H., E. D. McArthur, J. H. Graham, and D. C. Freeman. 1997. Narrow hybrid zone between two subspecies of big sagebrush (Artemisia tridentata<\/i>: Asteraceae). IV. Reciprocal transplant experiments. Evolution 51: 95-102.<\/p>\n

Wang, H., E. D. McArthur, and D. C. Freeman. 1999. Narrow hybrid zone between two subspecies of big sagebrush (Artemisia tridentata Asteraceae) IX.\u00a0 Elemental uptake and niche separation.\u00a0 American Journal of Botany 86: 1099-1107.<\/p>\n

\n

Last Updated 6 August 2015<\/p>\n","protected":false},"excerpt":{"rendered":"

\u00a0 Big sagebrush (Artemisia tridentata) is the most widely distributed shrub in North America.\u00a0 There are five subspecies, and these often hybridize along environmental gradients.\u00a0 Two of these subspecies, basin […]<\/p>\n","protected":false},"author":29,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-341","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/pages\/341","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/users\/29"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/comments?post=341"}],"version-history":[{"count":3,"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/pages\/341\/revisions"}],"predecessor-version":[{"id":386,"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/pages\/341\/revisions\/386"}],"wp:attachment":[{"href":"https:\/\/sites.berry.edu\/jgraham\/wp-json\/wp\/v2\/media?parent=341"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}