TY - JOUR
T1 - Population Surveys and Viability Assessments for Coryphantha scheeri var. Robustispina, a Federally Protected Cactus of the Sonoran Desert
AU - Molano-Flores, Brenda
AU - Coons, Janice
AU - Zaya, David N.
N1 - Funding Information:
Routson, R. 2003. Demographic study of Coryphantha scheeri var. robustispina. Final Report for the U.S. Fish and Wildlife Service, Tucson, Arizona. Permit No. TE22190-0. NFWF Contract No. 2000-0015.
Funding Information:
A number of organizations and individuals worked together to make this project possible. We thank Arizona State Land Department, Arizona-Sonora Desert Museum, University of Arizona Herbarium, and Pima County. Special thanks to Dr. Marc Baker for making his long-term PPC dataset available to us. In addition, we are grateful for the help (logistics and fieldwork) that the following individuals provided: Nancy Coutant, Mary Ann Feist, Aaron D. Flesch, Paul Marcum, Shelley McMahon, Susan McIntire, Jean Mengelkoch, Ian Murray, Brian Powell, Vanessa Prileson, and John Wiens. Lastly, the Arizona Department of Agriculture has funded all or a portion of this project through the U.S. Fish and Wildlife Service Cooperative Endangered Species Conservation Fund (Section 6 of the Endangered Species Act; Project No. - Segment 20, 2016-2018-08).
Publisher Copyright:
© 2021 Natural Areas Association. All rights reserved.
PY - 2021/8/2
Y1 - 2021/8/2
N2 - Coryphantha scheeri var. robustispina (Pima pineapple cactus [PPC]; Cactaceae) is a small cylindrical cactus found in semi-desert grassland and Sonoran desert-scrub in southern Arizona and northern Mexico. This species was listed as endangered in 1993 in the USA, but does not have protection in Mexico. In 2017, surveys were repeated at six PPC sites with a long monitoring history within the Altar Valley, Pima County, Arizona. Overall, PPC individuals were found at five of the six sites (i.e., 83%). Although PPC is persisting at most sites and recruitment was observed at some sites, the overall pattern was one of decline within the surveyed area. In addition, population viability analyses predict that four sites will lose more than half of their individuals within 20 y, and five sites within 50 y. The information presented in this study should be useful for making decisions regarding federal protection for Coryphantha scheeri var. robustispina.
AB - Coryphantha scheeri var. robustispina (Pima pineapple cactus [PPC]; Cactaceae) is a small cylindrical cactus found in semi-desert grassland and Sonoran desert-scrub in southern Arizona and northern Mexico. This species was listed as endangered in 1993 in the USA, but does not have protection in Mexico. In 2017, surveys were repeated at six PPC sites with a long monitoring history within the Altar Valley, Pima County, Arizona. Overall, PPC individuals were found at five of the six sites (i.e., 83%). Although PPC is persisting at most sites and recruitment was observed at some sites, the overall pattern was one of decline within the surveyed area. In addition, population viability analyses predict that four sites will lose more than half of their individuals within 20 y, and five sites within 50 y. The information presented in this study should be useful for making decisions regarding federal protection for Coryphantha scheeri var. robustispina.
KW - Arizona
KW - demographics
KW - Pima pineapple cactus
KW - quasi-extinction probabilities
KW - rare plant
UR - http://www.scopus.com/inward/record.url?scp=85112056261&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85112056261&partnerID=8YFLogxK
U2 - 10.3375/043.041.0308
DO - 10.3375/043.041.0308
M3 - Article
AN - SCOPUS:85112056261
SN - 0885-8608
VL - 41
SP - 213
EP - 217
JO - Natural Areas Journal
JF - Natural Areas Journal
IS - 3
ER -