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1. Extreme drought induces rapid declines in co‐occurring native Bouteloua eriopoda and invasive Eragrostis lehmanniana

Author

Sherri L. Buerdsell, Brook G. Milligan, and Erik A. Lehnhoff

Subjects
black grama, Chihuahuan Desert, drought sensitivity, Lehmann lovegrass, plant invasion, precipitation pivot point, Ecology, QH540-549.5
Abstract

Abstract Global climate change is expected to result in increased temperatures and variation in precipitation. In the Desert Southwest region of the United States, climate change may result in drier conditions. Eragrostis lehmanniana (Lehmann lovegrass) is an invasive species that has extensively colonized the southwestern United States, including Bouteloua eriopoda (black grama) grasslands. While both E. lehmanniana and B. eriopoda evolved in arid conditions, drier conditions may influence this invader–native system in unforeseen ways. Using a combination of precipitation pivot point (PPP) and drought sensitivity (DS) analysis, we compared responses of B. eriopoda and E. lehmanniana to altered precipitation regimes including long‐term drought treatments in the northern Chihuahuan Desert, New Mexico. We defined PPP as the critical point in precipitation amount below which plant percent cover decreased and above which it increased. We used DS, defined as the square millimeters of cover lost when precipitation decreased by 1 mm, to elucidate the direct response of biomass to drought on either side of the PPP. We estimated mean monsoon PPPs of 62.5 and 63.7 mm for B. eriopoda and E. lehmanniana, respectively. We estimated mean annual (1 October–30 September) PPPs of 108.6 and 108.5 mm for B. eriopoda and E. lehmanniana, respectively. Bouteloua eriopoda mean DS was 4.71 mm2/mm. Eragrostis lehmanniana mean DS was 1.56 mm2/mm. Results suggest that it is unlikely that extended drought will benefit E. lehmanniana over B. eriopoda and both species may decline under extreme drought.

Published
2022
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2. Invasive plant benefits a native plant through plant-soil feedback but remains the superior competitor

Author

Sherri L. Buerdsell, Brook G. Milligan, and Erik A. Lehnhoff

Subjects
Biology (General), QH301-705.5
Abstract

Plant soil feedback (PSF) occurs when a plant modifies soil biotic properties and those changes in turn influence plant growth, survival or reproduction. These feedback effects are not well understood as mechanisms for invasive plant species. Eragrostis lehmanniana is an invasive species that has extensively colonized the southwest US. To address how PSFs may affect E. lehmanniana invasion and native Bouteloua gracilis growth, soil inoculant from four sites of known invasion age at the Appleton-Whittell Audubon Research Ranch in Sonoita, AZ were used in a PSF greenhouse study, incorporating a replacement series design. The purpose of this research was to evaluate PSF conspecific and heterospecific effects and competition outcomes between the invasive E. lehmanniana and a native forage grass, Bouteloua gracilis. Eragrostis lehmanniana PSFs were beneficial to B. gracilis if developed in previously invaded soil. Plant-soil feedback contributed to competitive suppression of B. gracilis only in the highest ratio of E. lehmanniana to B. gracilis. Plant-soil feedback did not provide an advantage to E. lehmanniana in competitive interactions with B. gracilis at low competition levels but were advantageous to E. lehmanniana at the highest competition ratio, indicating a possible density-dependent effect. Despite being beneficial to B. gracilis under many conditions, E. lehmanniana was the superior competitor.

Published
2021
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3. Range-wide assessment of a SNP panel for individualization and geolocalization of bigleaf maple (Acer macrophyllum Pursh)

Author

Richard C. Cronn, Kristen N. Finch, Laura L. Hauck, Meaghan Parker-Forney, Brook G. Milligan, Jenélle Dowling, and Adventure Scientists

Subjects
Timber poaching, Bigleaf maple, Acer macrophyllum, Agena MassARRAY®, Ecology, QH540-549.5, Veterinary medicine, SF600-1100
Abstract

Illegal logging is a worldwide problem that degrades ecosystems, and even low-risk markets like the United States report ~1000 significant hardwood timber theft cases per year. Due to its high value, bigleaf maple (Acer macrophyllum Pursh) is a common target of timber theft in western North America. Using samples from Washington, USA, a single nucleotide polymorphism [SNP] assay was recently developed to facilitate timber poaching investigations in this species based on the single base extension Agena MassARRAY® genotyping system and 133 loci. Our study expands earlier evaluations to include the full 2000 km latitudinal range of bigleaf maple, using 1142 samples collected from California, USA to British Columbia, CAN. Populations in this study are equivalent to level 3 ecoregions, with sample sizes ranging from 28 (California Coast) to 191 (Washington Coast). Wood-derived DNA concentrations between 0.24 and 6 ng/μL yielded SNP call rates >92%, and DNA concentrations within this range did not influence genotyping call rates. DNA from different tissues showed a weak but significant difference in call rate, with DNA from wood showing a slightly higher call rate than leaves (99.4% vs 97.9%, respectively). Analysis of 108 sample replicates showed that missing genotypes occurred at 0.165% of all loci, and that allelic drop-outs and drop-ins each occurred at frequencies of 0.022% and 0.032%, respectively. Population-specific genotype profile probabilities for Pacific Northwest ecoregions were lower than 1.9×10−33; profile probabilities are higher (less powerful) in Californian trees due to lower variability across these SNP loci. Conversely, the geographic origin of trees from Southern Californian ecoregions could be predicted with lower error (8.5–11.7%) than trees from the Pacific Northwest (36–80%), based on random forest classification. This study provides a rich database for forensic individualization of bigleaf maple across its complete range in western North America.

Published
2021
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4. Alignment-free genome comparison enables accurate geographic sourcing of white oak DNA

Author

Kujin Tang, Jie Ren, Richard Cronn, David L. Erickson, Brook G. Milligan, Meaghan Parker-Forney, John L. Spouge, and Fengzhu Sun

Subjects
Biotechnology, TP248.13-248.65, Genetics, QH426-470
Abstract

Abstract Background The application of genomic data and bioinformatics for the identification of restricted or illegally-sourced natural products is urgently needed. The taxonomic identity and geographic provenance of raw and processed materials have implications in sustainable-use commercial practices, and relevance to the enforcement of laws that regulate or restrict illegally harvested materials, such as timber. Improvements in genomics make it possible to capture and sequence partial-to-complete genomes from challenging tissues, such as wood and wood products. Results In this paper, we report the success of an alignment-free genome comparison method, d2∗, $$ {d}_2^{\ast }, $$ that differentiates different geographic sources of white oak (Quercus) species with a high level of accuracy with very small amount of genomic data. The method is robust to sequencing errors, different sequencing laboratories and sequencing platforms. Conclusions This method offers an approach based on genome-scale data, rather than panels of pre-selected markers for specific taxa. The method provides a generalizable platform for the identification and sourcing of materials using a unified next generation sequencing and analysis framework.

Published
2018
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5. Author Correction: Evolutionary history of plant hosts and fungal symbionts predicts the strength of mycorrhizal mutualism

Author

Jason D. Hoeksema, James D. Bever, Sounak Chakraborty, V. Bala Chaudhary, Monique Gardes, Catherine A. Gehring, Miranda M. Hart, Elizabeth Ann Housworth, Wittaya Kaonongbua, John N. Klironomos, Marc J. Lajeunesse, James Meadow, Brook G. Milligan, Bridget J. Piculell, Anne Pringle, Megan A. Rúa, James Umbanhowar, Wolfgang Viechtbauer, Yen-Wen Wang, Gail W. T. Wilson, and Peter C. Zee

Subjects
Biology (General), QH301-705.5
Abstract

In the original published version of the article, the description of the fixed-effect predictor Inoculum Complexity presented in the Methods was incorrect. The incorrect description given was: “single fungal genus, multiple fungal genera, or whole soil inoculum”. The correct description is: “single fungal species, multiple fungal species, or whole soil inoculum”. The error does not affect any of the results presented in the paper. The correction has been made to the HTML and PDF versions of the paper.

Published
2018
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6. Home OCT Imaging for Newly Diagnosed Neovascular Age-Related Macular Degeneration: A Feasibility Study

Author

Glassman, Adam R., Beck, Roy W., Baptista, Alyssa, Beaulieu, Wesley T., Calhoun, Claire T., Constantine, Sharon R., Dale, Brian B., Dupre, Simone S., Franklin, Crystal A., Galusic, Sandra, Huggins, Meagan, Hunter, Brenda L., Johnson, Paula A., Josic, Kristin, Kelly, Brittany, Liu, Danni, Maguire, Maureen G., Meadows, Britney, Melia, Michele, Preston, Carin M., Stockdale, Cynthia R., Zokruah, Alice, Sun, Jennifer K., Martin, Daniel F., Bhargava, Sangeeta, Barkmeier, Andrew J., Baskin, Darrell, Blodi, Barbra, Chew, Emily, Ferris, Frederick L., III, Jaffe, Glenn J., Jampol, Lee M., Jhaveri, Chirag D., MacCumber, Mathew, Maturi, Raj K., Solomon, Sharon D., Antoszyk, Andrew N., Lujan, Brandon, Slahi-Had, Hani, Lane, Richard Gary, Adams, Lydia, Rivera, Rachel R., Nakoski, Brenda, Weeks, Rhonda F., Braverman, Allan L., McDonald-Mueller, Lauren, Stuart, Maria A., Pulliam, Brook G., Boyd, Lynda K., Wehmeier, Jarrod, Schremp, Steve A., Googe, Joseph M., Oliver, Kristina, Walsh, Justin, Asher, Julie, Milstead, Katie, Wheeler, Jeff, Griffone, Hodge A., Blinder, Kevin J., Calhoun, Claire, Mein, Calvin E., Baskin, Darrell E., Vieyra, Gabriela, and Chica, Moises A.

Published
2024
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9. Home OCT Imaging for Newly Diagnosed Neovascular Age-Related Macular Degeneration

Author

Blinder, Kevin J., primary, Calhoun, Claire, additional, Maguire, Maureen G., additional, Glassman, Adam R., additional, Mein, Calvin E., additional, Baskin, Darrell E., additional, Vieyra, Gabriela, additional, Jampol, Lee M., additional, Chica, Moises A., additional, Sun, Jennifer K., additional, Martin, Daniel F., additional, Beck, Roy W., additional, Baptista, Alyssa, additional, Beaulieu, Wesley T., additional, Calhoun, Claire T., additional, Constantine, Sharon R., additional, Dale, Brian B., additional, Dupre, Simone S., additional, Franklin, Crystal A., additional, Galusic, Sandra, additional, Huggins, Meagan, additional, Hunter, Brenda L., additional, Johnson, Paula A., additional, Josic, Kristin, additional, Kelly, Brittany, additional, Liu, Danni, additional, Meadows, Britney, additional, Melia, Michele, additional, Preston, Carin M., additional, Stockdale, Cynthia R., additional, Zokruah, Alice, additional, Bhargava, Sangeeta, additional, Barkmeier, Andrew J., additional, Baskin, Darrell, additional, Blodi, Barbra, additional, Chew, Emily, additional, Ferris, Frederick L., additional, Jaffe, Glenn J., additional, Jhaveri, Chirag D., additional, MacCumber, Mathew, additional, Maturi, Raj K., additional, Solomon, Sharon D., additional, Antoszyk, Andrew N., additional, Lujan, Brandon, additional, Slahi-Had, Hani, additional, Lane, Richard Gary, additional, Adams, Lydia, additional, Rivera, Rachel R., additional, Nakoski, Brenda, additional, Weeks, Rhonda F., additional, Braverman, Allan L., additional, McDonald-Mueller, Lauren, additional, Stuart, Maria A., additional, Pulliam, Brook G., additional, Boyd, Lynda K., additional, Wehmeier, Jarrod, additional, Schremp, Steve A., additional, Googe, Joseph M., additional, Oliver, Kristina, additional, Walsh, Justin, additional, Asher, Julie, additional, Milstead, Katie, additional, Wheeler, Jeff, additional, and Griffone, Hodge A., additional

Published
2023
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18. Author Correction: Evolutionary history of plant hosts and fungal symbionts predicts the strength of mycorrhizal mutualism

Author

Hoeksema, Jason D., Bever, James D., Chakraborty, Sounak, Chaudhary, V. Bala, Gardes, Monique, Gehring, Catherine A., Hart, Miranda M., Housworth, Elizabeth Ann, Kaonongbua, Wittaya, Klironomos, John N., Lajeunesse, Marc J., Meadow, James, Milligan, Brook G., Piculell, Bridget J., Pringle, Anne, Rúa, Megan A., Umbanhowar, James, Viechtbauer, Wolfgang, Wang, Yen-Wen, Wilson, Gail W. T., and Zee, Peter C.

Published
2018
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21. Evolutionary history of plant hosts and fungal symbionts predicts the strength of mycorrhizal mutualism

Author

Hoeksema, Jason D., Bever, James D., Chakraborty, Sounak, Chaudhary, V. Bala, Gardes, Monique, Gehring, Catherine A., Hart, Miranda M., Housworth, Elizabeth Ann, Kaonongbua, Wittaya, Klironomos, John N., Lajeunesse, Marc J., Meadow, James, Milligan, Brook G., Piculell, Bridget J., Pringle, Anne, Rúa, Megan A., Umbanhowar, James, Viechtbauer, Wolfgang, Wang, Yen-Wen, Wilson, Gail W. T., and Zee, Peter C.

Published
2018
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23. Peripheres Nervensystem: Neuro-Tissue Engineering mit einem mikrostrukturierten Kollagenträger als bioartifizielle Nervenleitschiene

Author

Bozkurt, A., Brook, G. A., Heschel, I., Lassner, F., Möllers, S., Olde Damink, L., Schügner, F., Deumens, R., O’Dey, D. M., Tolba, R., Sellhaus, B., Weis, J., Pallua, N., Buhr, H. J., editor, Hölscher, A., editor, Izbicki, J. R., editor, Jauch, K. W., editor, Post, S., editor, Allgayer, H., editor, Bartsch, D. K., editor, Fries, H., editor, Ghadimi, B. M., editor, Habermann, J. K., editor, Kalthoff, H., editor, Schackert, H. K., editor, Bruns, C. J., editor, Duda, D. N., editor, Fändrich, F., editor, Heberer, M., editor, Nüssler, A. K., editor, Stark, G. B., editor, Brückner, U. B., editor, Ertel, W., editor, Faist, E., editor, Heidecke, C. D., editor, Kalff, J. C., editor, Menger, M. D., editor, Schade, U. F., editor, Vollmar, B., editor, Bechstein, W. O., editor, Klar, E., editor, Klempnauer, J., editor, Minor, T., editor, Neuhaus, P., editor, Schmidt, J., editor, Langer, S., editor, Laschke, M. W., editor, Machens, H. G., editor, Steinau, H. U., editor, Südkamp, N., editor, Vogt, P., editor, Berger, D., editor, Klinge, U., editor, Schachtrupp, A., editor, Schilling, M. K., editor, Schumpelick, V., editor, Altendorf-Hofmann, A., editor, Bollschweiler, E., editor, Bruch, H. -P., editor, Lehnert, T., editor, Lorenz, W., editor, Neugebauer, E., editor, Ohmann, C., editor, Seiler, C. M., editor, Becker, H., editor, Betzler, M., editor, Bittner, R., editor, Broelsch, C., editor, Büchler, M. W., editor, Bumm, R., editor, Dralle, H., editor, Friess, H., editor, Frilling, A., editor, Germer, C. T., editor, Hopt, U., editor, Jonas, S., editor, Jost, J., editor, Markus, B., editor, Raab, H. R., editor, Reith, H. B., editor, Schlag, P. M., editor, Teichmann, W., editor, Uhl, W., editor, Wenisch, H., editor, and Zornig, C., editor

Published
2009
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29. Discussion

Author

Polmear, I. J., Brook, G. B., Hondros, E. D., Wyatt, L. M., Hunsicker, H. Y., Partridge, P. G., Cooper, G., Imrie, W. M., Tyrer, H., Morton, P. H., Nicholson, R. B., Duckworth, W. E., Miles, D. E., Restall, J. E., Holmes, D. R., Stubbington, C. A., and Skerrey, E. W.

Published
1976

32. Invasive plant benefits a native plant through plant-soil feedback but remains the superior competitor

Author

Erik A. Lehnhoff, Brook G. Milligan, and Sherri L. Buerdsell

Subjects
0106 biological sciences, Plant–soil feedback, plant competition, Ecology, QH301-705.5, Ecological Modeling, Plant Science, Aquatic Science, Native plant, soil microbiota, 010603 evolutionary biology, 01 natural sciences, Below-ground interactions, Invasive species, invasion ecology, Agronomy, Insect Science, black grama, Environmental science, Animal Science and Zoology, Lehmann lovegrass, Biology (General), Ecology, Evolution, Behavior and Systematics, 010606 plant biology & botany, plant invasion
Abstract

Plant soil feedback (PSF) occurs when a plant modifies soil biotic properties and those changes in turn influence plant growth, survival or reproduction. These feedback effects are not well understood as mechanisms for invasive plant species. Eragrostis lehmanniana is an invasive species that has extensively colonized the southwest US. To address how PSFs may affect E. lehmanniana invasion and native Bouteloua gracilis growth, soil inoculant from four sites of known invasion age at the Appleton-Whittell Audubon Research Ranch in Sonoita, AZ were used in a PSF greenhouse study, incorporating a replacement series design. The purpose of this research was to evaluate PSF conspecific and heterospecific effects and competition outcomes between the invasive E. lehmanniana and a native forage grass, Bouteloua gracilis. Eragrostis lehmannianaPSFs were beneficial to B. gracilis if developed in previously invaded soil. Plant-soil feedback contributed to competitive suppression of B. gracilis only in the highest ratio of E. lehmanniana to B. gracilis. Plant-soil feedback did not provide an advantage to E. lehmanniana in competitive interactions with B. gracilis at low competition levels but were advantageous to E. lehmanniana at the highest competition ratio, indicating a possible density-dependent effect. Despite being beneficial to B. gracilis under many conditions, E. lehmanniana was the superior competitor.

Published
2021

37. Evolutionary history of plant hosts and fungal symbionts predicts the strength of mycorrhizal mutualism

Author

James Umbanhowar, John N. Klironomos, Sounak Chakraborty, Wittaya Kaonongbua, Wolfgang Viechtbauer, V. Bala Chaudhary, Yen Wen Wang, Brook G. Milligan, James D. Bever, Elizabeth A. Housworth, Anne Pringle, Miranda M. Hart, Gail W. T. Wilson, Jason D. Hoeksema, Megan A. Rúa, James F. Meadow, Catherine A. Gehring, Peter C. Zee, Monique Gardes, Marc J. Lajeunesse, and Bridget J. Piculell

Subjects
0106 biological sciences, 0301 basic medicine, Mutualism (biology), Community, Ecology, fungi, Biodiversity, food and beverages, Medicine (miscellaneous), Parasitism, Biology, 010603 evolutionary biology, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, 030104 developmental biology, Nutrient, Symbiosis, lcsh:Biology (General), Phylogenetics, Evolutionary ecology, General Agricultural and Biological Sciences, lcsh:QH301-705.5
Abstract

Most plants engage in symbioses with mycorrhizal fungi in soils and net consequences for plants vary widely from mutualism to parasitism. However, we lack a synthetic understanding of the evolutionary and ecological forces driving such variation for this or any other nutritional symbiosis. We used meta-analysis across 646 combinations of plants and fungi to show that evolutionary history explains substantially more variation in plant responses to mycorrhizal fungi than the ecological factors included in this study, such as nutrient fertilization and additional microbes. Evolutionary history also has a different influence on outcomes of ectomycorrhizal versus arbuscular mycorrhizal symbioses; the former are best explained by the multiple evolutionary origins of ectomycorrhizal lifestyle in plants, while the latter are best explained by recent diversification in plants; both are also explained by evolution of specificity between plants and fungi. These results provide the foundation for a synthetic framework to predict the outcomes of nutritional mutualisms. Jason Hoeksema et al. report a meta-analysis of the drivers of outcomes in mycorrhizal mutualisms across 646 plant–fungi combinations. They find that evolutionary history explains substantially more variation in the strength of mycorrhizal mutualisms than do ecological factors.

Published
2018

38. Plasma Vascular Endothelial Growth Factor Concentrations after Intravitreous Anti–Vascular Endothelial Growth Factor Therapy for Diabetic Macular Edema

Author

Lee M. Jampol, Adam R. Glassman, Danni Liu, Lloyd Paul Aiello, Neil M. Bressler, Elia J. Duh, Susan Quaggin, John A. Wells, Charles C. Wykoff, David Browning, Andrew N. Antoszyk, Angela K. Price, Sherry L. Fredenberg, Jenna T. Herby, Christina J. Fleming, Ashley A. McClain, Sarah A. Ennis, Kelly R. Gallagher, Angella S. Karow, Autumn C. Grupp, Danielle Puskas, Lynn Watson, Swann J. Bojaj, Uma M. Balasubramaniam, Donna McClain, Donna R. Styles, Jeff A. Kuopus, Kathryn Kimrey, Loraine M. Clark, Lisa A. Jackson, Michael D. McOwen, Matt Dunlap, Susannah J. Held, Dante J. Pieramici, Ma'an A. Nasir, Alessandro A. Castellarin, Dilsher Dhoot, Sarah Fishbein, Jack Giust, Lisha Wan, Michelle S. Hanna, Melvin D. Rabena, Jerry Smith, Layne J. Bone, Kelly Avery, Matthew Giust, Aimee Walker, Aimee H. Shook, Sara Esau, Nitce L. Ruvalcaba, W. Lloyd Clark, David L. Johnson, John F. Payne, Tiffany R. Swinford, Mallie M. Taylor, Cassandra L. Garrison, Peggy D. Miller, Amber R. Houlahan, Charlotte A. O'Neill, Ashley Floyd, Crystal C. Parker, Courtney Sease, Tara Graham, Robin Spencer, Tiffany N. Ogbuewu, Ashley Studebaker, Tyler Huggins, Robbin Spivey, Brian Jones, Ashley Williams, Ron Petty, Erin L. Poston, G. Michael Ward, Carl W. Baker, Ron H. Tilford, Tracey M. Caldwell, Lynnette F. Lambert, Mary J. Palmer, Tracey R. Martin, Tana R. Williams, Samantha Kettler, Alecia B. Camp, Paolo S. Silva, Paul G. Arrigg, George S. Sharuk, Sabera T. Shah, Jennifer K. Sun, Corey Westerfeld, Christopher Michael Andreoli, Deborah Schlossman, Timothy Murtha, Hanna Kwak, Flor M. Flores, Margaret E. Stockman, Troy Kieser, Michael N. Krigman, Leila Bestourous, Elizabeth S. Weimann, Jerry D. Cavallerano, Kristen M. Hock, Mary Ann Robertson, Rita K. Kirby, Steve L. Papaconstantinou, Kylie M. Madigan, Robert W. Cavicchi, Kate A. Palitsch, Taygan Yilmaz, Brian B. Berger, Chirag D. Jhaveri, Tori Moore, Ginger J. Manhart, Rachel A. Walsh, Ivana Gunderson, Dietrich Riepen, Chelsey A. Bravenec, Ryan M. Reid, Yong Ren, Ben Ostrander, Christopher C. Stovall, Michael J. Elman, Robert A. Liss, Henry A. Leder, JoAnn Starr, Jennifer L. Belz, Charlene K. Putzulo, Dallas R. Sandler, Jennifer L. Simmons, Pamela V. Singletary, Ashley Davis, Perel M. Simpson, Teresa Coffey, Daniel J. Ketner, Terri Cain, Ashley M. Metzger, Peter Sotirakos, Dennis M. Marcus, Harinderjit Singh, Courtney N. Roberts, Geri L. Floyd, Siobhan O. Ortiz, Virginia Mims, L. Allison Foster, Christy Coursey, Jared C. Gardner, Ken Ivey, John Stewart O'Keefe, Juan A. Astruc, Bryan J. Schwent, Ali R. Tabassian, Suzette A. Rosen, David C. Vaughan, Jeffrey Michaels, Natalie J. Arndt, John J. Maziarz, Scott M. Friedman, Nader Moinfar, Kimberly A. Williamson, Damanda F. Fagan, Katrina L. Dawson, Paige N. Walters, Allen McKinney, Steve Carlton, Robert C. Kwun, Victoria L. Knudsen, Kirk E. Winward, Mano Swartz, James G. Howard, Michelle Riley, Gena Taylor, Michelle Holt, Jason G. Winward, Adam Walsh, Teresa Taylor, Daniel Walsh, G. Robert Hampton, Jamin S. Brown, Rajeev K. Seth, Laurie J. Sienkiewycz, Deborah A. Appleton, Cindy J. Grinnell, Charity A. Cowley, Lynn M. Kwasniewski, Michelle L. Manley, Nicole E. Robarge, Stefanie R. DeSantis, Peter B. Hay, Teresa M. DeForge, Tien P. Wong, Eric Chen, David M. Brown, Rosa Y. Kim, James C. Major, Amy C. Schefler, Richard H. Fish, Matthew S. Benz, Meredith Lipman, Amy Hutson, Nubia Landaverde, Ashley E. Chancey, Cassie Cone, Tressa Royse, Veronica A. Sneed, Belinda A. Almanza, Brenda Dives, Beau A. Richter, Eric N. Kegley, Andreas K. Lauer, Christina J. Flaxel, Steven T. Bailey, Mitchell Schain, Ann D. Lundquist, Shelley A. Hanel, Shirley D. Ira, Susan K. Nolte, Peter N. Steinkamp, Dawn M. Ryan, Scott R. Pickell, Jocelyn T. Hui, Michelle Brix, Jordan Barth, Chris S. Howell, Gregory M. Fox, Blake A. Cooper, Ivan R. Batlle, Lexie R. Manning, Karla A. Batlle, Holly Wyrick, Katherine Pippin, Samantha Perkins, Frank T. Yeager, Ryan B. Rush, Glenn R. Gardner, Christi Rush, Johnathan R. Hawkins, Brenda Dumas, Ben Ysasaga, Chirag P. Shah, Michael G. Morley, Torsten W. Wiegand, Tina S. Cleary, Trexler M. Topping, Lindsey Colegrove, Katharine Bechtel, Britta Johnson, Lisa Lebedew, Natacha Lorius, Sandy G. Chong, Jennifer L. Stone, Michael Cullen Jones, Dennis Donovan, Sherry Malone, Margie Graham, Audrey Santos, Steve A. Bennett, Kevin J. Blinder, Bradley T. Smith, Ginny S. Nobel, Rhonda F. Weeks, Erika A. Hoehn, Maria A. Stuart, Kelly E. Pepple, Lynda K. Boyd, Brook G. Pulliam, Steve A. Schremp, Stephanie L. Guevara, Jarrod Wehmeier, Timothy L. Wright, Dana L. Gabel, David G. Miller, Jerome P. Schartman, Lawrence J. Singerman, Joseph M. Coney, Michael A. Novak, Llewelyn J. Rao, Susan C. Rath, Elizabeth McNamara, Larraine Stone, Veronica A. Smith, Cecelia Rykena, Kimberly A. DuBois, Mary A. Ilc, Vivian Tanner, Kim Drury, Trina M. Nitzsche, Gregg A. Greanoff, John C. DuBois, Stuart K. Burgess, Tirso M. Lara, Noel H. Pereda, Cindy V. Fernandez, Deborah Davis, Evelyn Quinchia, Karen Workman, Jared S. Nielsen, Jeong-Hyeon Sohn, Kyle J. Alliman, David D. Saggau, Marianne Parker, Bethany George, Carrie L. Eastvold, Kristin Sells, Tami Jo Woehl, Marilyn A. Johnson, Holly Keenan, Jennifer L. Coleman, Jamie Spillman, Shannon Freeman, Leigh S. Schmidt, Lisa M. Boender, Jill L. Partin, Bailey R. Bennett, Jay Rostvold, Cameron McLure Stone, Lea R. Raymer, Andrea K. Menzel, Leslie D. Rickman, Barbara Campbell, Lorraine P. Sherlin, Lisa H. Hawkins, Melissa L. Buckner, Olesya N. Matsipura, Paula A. Price, A. Thomas Ghuman, Paul A. Raskauskas, Ashish G. Sharma, Glenn Wing, Joseph P. Walker, Eileen Knips, Cheryl Kiesel, Crystal Y. Peters, Cheryl Ryan, Laura Greenhoe, Natalie N. Torres, Rebecca J. Youngblood, Danielle Turnbo, Anita H. Leslie, Etienne C. Schoeman, Raymond K. Kiesel, Ronald M. Kingsley, Vinay A. Shah, Robert E. Leonard, Heather R. Miller, Sonny Icks, Vanessa A. Bergman, Vanessa K. Drummond, Brittany L. Ross, Reshial D. Ellis, Tina R. Whittington, Shannon R. Almeida, Amanda M. Butt, Russ Burris, Mark A. Peters, Michael S. Lee, Paul S. Tlucek, Colin Ma, Stephen Hobbs, Amanda C. Milliron, Stephanie L. Ho, Marcia Kopfer, Joe Logan, Christine Hoerner, Joseph A. Khawly, Hassan T. Rahman, Diana Abdelgani, Pam S. Miller, Debbie Fredrickson, Erica Pineda, Desiree Lopez, Donald K. Lowd, Colin Blank, Lorena R. Martinez, Jason E. Muniz, Justin Gottlieb, Michael S. Ip, Barbara A. Blodi, Kristine A. Dietzman, Kathryn F. Burke, Christopher M. Smith, Shelly R. Olson, Angela M. Wealti, Sandie L. Reed, Denise A. Krolnik, John C. Peterson, Victor Hugo Gonzalez, Roberto Diaz-Rohena, Juan G. Santiago, Rohit Adyanthaya, Nehal R. Patel, Deyla Anaya, Dina Garcia, Edna E. Cruz, Crystal A. Alvarez, Ruth Iracheta, Jessica Rodriguez, Monica R. Cantu, Rebecca R. Flores, Hector Jasso, Rachel Rodriguez, Karina Miranda, Krystle R. Lozano, Maricela Garza, Lazaro Aguero, Amanda L. Sandoval, Monique Montemayor, Samuel Alonso, Santos Garza, David Allen DiLoreto, Rajeev S. Ramchandran, David M. Kleinman, George W. O'Gara, Andrea M. Czubinski, Peter MacDowell, Kari M. Steinmetz, Dan A. Castillo, Yvonne F. Yu, Salina M. Tongue, Melissa S. Keim, Rachel Hollar, Brandi N. Deats, Brittany S. Richardson, Lynn Singer, Taylor A. Pannell, Stewart A. Daniels, Tushar M. Ranchod, Craig J. Leong, Stacey Touson, Shannon R. Earl, Melissa C. Bartlett, Christine Fernando, Djorella Factor, Jessica Garcia, Anna K. Nguyen, Betty Hom, Cathy Walker, Grace M. Marudo, Jose Carlos Suazo, Leah M. McNeil, Fred Hanamoto, Matthew D. Hughes, Robin D. Ross, Susan M. Sanford, Nicole Martini Markiewicz, Tracy M. Utley, Shannon Henderson, Joanie H. Lippincott, Patricia Streasick, Louis C. Glazer, Frank W. Garber, Jeffrey D. Zheutlin, Angela D. Listerman, Christine E. Feehan, Heather L. Cruz, Donald E. Kuitula, Olivia P. Rainey, Sue Weatherbee, Joseph M. Googe, R. Keith Shuler, Nicholas G. Anderson, Stephen L. Perkins, Kristina Oliver, Nicole Grindall, Ann Arnold, Jennifer Beerbower, Cecile Hunt, Kathy L. Schulz, Sarah M. Oelrich, Jerry K. Whetstone, Justin Walsh, Chris Morris, Robert W. Wong, Peter A. Nixon, Jeni L. Leon, Chris A. Montesclaros, Carrie E. Leung, Phill Le, Codey L. Harborth, Margaret A. Rodriguez, Cory Mangham, Thomas M. Aaberg, Scott J. Westhouse, Holly L. Vincent, Rebecca Malone, Kathy L. Karsten, Raj K. Maturi, Ashley M. Harless, Carolee K. Novak, Laura A. Bleau, Thomas Steele, Charlotte Harris, Alisha Bildner, Abby Maple, Thomas W. Stone, Rick D. Isernhagen, John W. Kitchens, Diana M. Holcomb, Jeanne Van Arsdall, Michelle Buck, Edward A. Slade, Mark T. Chiu, Ashok K. Reddy, Frank W. Wyant, Mary M. Montano-Niles, Lorraine J. Carter, Shirley Maerki, Laura Tartaglia, Paul P. Gomez, Stephen A. Maestas, Camille Shanta, Lisbrenda M. Jimenez, Robert A. Stoltz, Stephanie L. Vanderveldt, Scott I. Lampert, Leslie G. Marcus, Shelly Fulbright, James P. Martin, Roger L. Novack, David S. Liao, Tammy Eileen Lo, Janet Kurokouchi, Richard Ngo, Connie V. Hoang, Julio Sierra, Adam Zamboni, Eric G. Protacio, Jeff Kessinger, Seema Garg, Odette M. Houghton, Jan Niklas Ulrich, Sai H. Chavala, Elizabeth L. DuBose, Cassandra J. Barnhart, Megha Karmalkar, Pooja D. Jani, Justin Goble, Debra Cantrell, Rona Lyn Esquejo, Sandeep N. Shah, Natasha Harmon, Mandeep S. Dhalla, Mario R. del Cid, Lawrence S. Halperin, Jaclyn A. Brady, Monica Hamlin, Monica L. Lopez, Jamie Mariano, Candace M. Neale, Rita R. Veksler, Angelica Mannarelli, Robert E. Coffee, Petros Euthymiou Carvounis, Pejman Hemati, Cindy J. Dorenbach, Annika S. Joshi, April Leger, Dana B. Barnett, Joseph F. Morales, Sam E. Mansour, Cathy Choyce, Aissa L. Dirawatun, Emma A. Nagy, Jamie C. Kerkstra, Joseph T. Fan, Mukesh Bhogilal Suthar, Michael E. Rauser, Gisela Santiago, Liel Marvyn Cerdenio, Brandi J. Perez, Kara E. Halsey, William H. Kiernan, Jesse Knabb, Rachel Catren, Michel Shami, Brenda K. Arrington, Keri S. Neuling, Ashaki Meeks, Natalie R. Garcia, Kayla Blair, Ginger K. Rhymes, Janet Medrano, Judy E. Kim, David V. Weinberg, Kimberly E. Stepien, Thomas B. Connor, Vesper V. Williams, Tracy L. Kaczanowski, Krissa L. Packard, Judy Flanders, Vicki Barwick, Pat A. Winter, Joseph R. Beringer, Kathy J. Selchert, John T. Lehr, Elaine Rodriguez-Roman, Teri Jones, Martha Eileen Haddox, Mark Pena, Brenda Hernandez, Clement K. Chan, Maziar Lalezary, Steven G. Lin, Kimberly S. Walther, Tiana Gonzales, Lenise E. Myers, Kenneth M. Huff, Richard Chace, Sunny Kallay, Kirsten Stevens, Nicole Dolbec, Ronda Baker-Hill, Janea Surette, Steven J. Rose, Brian P. Connolly, Ernest G. Guillet, Edward F. Hall, Margaret M. Yagoda, Mary Jo Doran, Mindy Burgess, Ann Reynard, Margaret Powers, Joe Territo, Calvin E. Mein, Moises A. Chica, R. Gary Lane, Sarah Elizabeth Holy, Lita Kirschbaum, Vanessa D. Martinez, Jaynee Baker, Christa G. Kincaid, Elaine Castillo, Christopher Sean Wienecke, Sara L. Schlichting, Brenda Nakoski, Kenneth R. Diddie, Deborah M. Cadwell, Louise Van Arsdale, Taryn F. Boisvert, Joyce Galonsky, Susie O'Hayer, Melissa L. Johnson, Frank J. McCabe, Brad J. Baker, Melvyn H. Defrin, Marie V. Lampson, Heather Pratte, Selena A. Baron, Aundrea S. Borelli, Frederick H. Davidorf, Michael B. Wells, Susie Chang, John Byron Christoforidis, Alan D. Letson, Jill A. Salerno, Jerilyn G. Perry, Stephen E. Shelley, Patrick J. Fish, Michael H. Scott, James A. Dixon, Shannon R. Walsh, Philomina M. Ozpirincci, Brenda L. Tebon, Marcia J. Moyle, Michael R. Pavlica, Noelle S. Matta, Cristina M. Brubaker, Alyson B. Backer, Neelakshi Bhagat, Catherine Fay, Tatiana Mikheyeva, Michael Lazar, Janie D. Ellenberger, Beth Malpica, Alexander J. Brucker, Benjamin J. Kim, Brian L. VanderBeek, Sheri Drossner, Joan C. DuPont, Rebecca Salvo, Stephanie B. Engelhard, Jim M. Berger, Sara Morales, Beth Serpentine, Paul L. Kaufman, Jessica D. McCluskey, Kathy T. Wynne, Julian Jordan, Brandun Watson, Robert S. Wirthlin, Eric S. Guglielmo, Eileen A. Dittman, Dylan C. Waidelich, Cristofer J. Garza, Adeline M. Stone, Ashley Nicole Oakes, Ivan J. Suner, Mark E. Hammer, Marc C. Peden, Janet R. Traynom, Rochelle DenBoer, Heidi Vargo, Susan Ramsey, Anita Kim Malzahn, Debra Jeffres, Nauman A. Chaudhry, Sumit P. Shah, Gregory M. Haffner, Emiliya German, Shannan Moreau, Laura A. Fox, Jennifer M. Matteson, JoAnna L. Pelletier, Alison Fontecchio, Emily Morse, Greg McNamara, Marie Grace Laglivia, Marissa L. Scherf, Angela LaPre, Justin A. Cocilo, Arup Das, Linda Friesen, Michele Franco, Johnny Lucero, Melissa Frazier, Robert Laviolette, Umar Khalil Mian, Rebecca L. Riemer, Evelyn Koestenblatt, Louise V. Wolf, Christine Kim, Irina Katkovskaya, Erica Otoo, Kevin A. Ellerbe, Kenneth Boyd, Caroline Costa, Paul Andrew Edwards, Hua Gao, Thomas Hessburg, Uday Desai, Janet Murphy, Mary K. Monk, Julianne Hall, Melina Mazurek, Katie M. Ventimiglia, Brian A. Rusinek, Bradley A. Stern, Kris Brouhard, Katie M. Weier, Megan Allis, Jenny Shaken, Nicole M. Massu, Tracy A. Troszak, David Burley, Abdhish R. Bhavsar, Geoffrey G. Emerson, Jacob M. Jones, Tracy A. Anderson, Andrea Gilchrist, Matt D. Peloquin, Gaid Gaid, Yang Vang, Samantha Ryan, Denise Vang, Alanna C. Evans, Tonja Scherer, Howard S. Lazarus, Debra Paige Bunch, Liana C. Davis, Kelly Booth, Margaret Trimble, Mary A. Bledsaw, Jay Moore, Daniel F. Rosberger, Sandra Groeschel, Miriam A. Madry, Nikoletta DiGirolamo, Dustin Pressley, Robert Santora, Yenelda M. Gomez, Karl R. Olsen, Robert L. Bergren, P. William Conrad, Pamela P. Rath, Avni Patel Vyas, Judy C. Liu, Lori A. Merlotti, Jennifer L. Chamberlin, Holly M. Mechling, Mary E. Kelly, Kellianne Marfisi, Kimberly A. Yeckel, Veronica L. Bennett, Christina M. Schultz, Grace A. Rigoni, Julie Walter, Missy A. Forish, Amanda Fec, Courtney L. Foreman, David Steinberg, Keith D. McBroom, Melvin C. Chen, Marc H. Levy, Waldemar Torres, Peggy Jelemensky, Tara L. Raphael, Joann Rich, Mark Sneath, James L. Kinyoun, Gurunadh Atmaram Vemulakonda, Susan A. Rath, Patricia K. Ernst, Juli A. Pettingill, Ronald C. Jones, Brad C. Clifton, James D. Leslie, Sharon D. Solomon, Lisa K. Levin, Deborah Donohue, Mary Frey, Lorena Larez, Keisha Murray, Rita L. Denbow, Janis Graul, David Emmert, Charles Herring, Nick Rhoton, Joe Belz, Alice T. Lyon, Rukhsana G. Mirza, Amanda M. Krug, Carmen Ramirez, Lori Kaminski, Anna Liza M. Castro-Malek, Amber N. Mills, Zuzanna Rozenbajgier, Marriner L. Skelly, Evica Simjanoski, Andrea R. Degillio, Jennifer I. Lim, Felix Y. Chau, Marcia Niec, Tametha Johnson, Yesenia Ovando, Mark Janowicz, Catherine Carroll, Jeffrey G. Gross, Barron C. Fishburne, Amy M. Flowers, Riley Stroman, Christen Ochieng, Angelique S.A. McDowell, Ally M. Paul, Randall L. Price, John H. Drouilhet, Erica N. Lacaden, Deborah J. Nobler, Howard L. Cummings, Deanna Jo Long, Ben McCord, Jason Robinson, Jamie Swift, Julie P. Maynard, Patricia J. Pahk, Hannah Palmer-Dwore, Dipali H. Dave, Mariebelle Pacheco, Barbara A. Galati, Eneil Simpson, Andrew J. Barkmeier, Diane L. Vogen, Karin A. Berg, Shannon L. Howard, Jean M. Burrington, Jessica Ann Morgan, Joan T. Overend, Shannon Goddard, Denise M. Lewison, Jaime L. Tesmer, Craig Michael Greven, Joan Fish, Cara Everhart, Mark D. Clark, David T. Miller, George Baker Hubbard, Jiong Yan, Blaine E. Cribbs, Linda T. Curtis, Judy L. Brower, Jannah L. Dobbs, Debora J. Jordan, Baseer U. Ahmad, Suber S. Huang, Hillary M. Sedlacek, Cherie L. Hornsby, Lisa P. Ferguson, Kathy Carlton, Kelly A. Sholtis, Peggy Allchin, Claudia Clow, Mark A. Harrod, Geoffrey Pankhurst, Irit Baum-Rawraway, Stacie A. Hrvatin, Ronald C. Gentile, Alex Yang, Wanda Carrasquillo-Boyd, Robert Masini, Chander N. Samy, Robert J. Kraut, Kathy Shirley, Linsey Corso, Karen Ely, Elizabeth Scala, Stewart Gross, Vanessa Alava, Eyal Margalit, Donna G. Neely, Maria Blaiotta, Lori Hagensen, April E. Harris, Rita L. Lennon, Denice R. Cota, Larry Wilson, Lloyd P. Aiello, Roy W. Beck, Susan B. Bressler, Kakarla V. Chalam, Ronald P. Danis, Bambi J. Arnold-Bush, Frederick Ferris, Talat Almukhtar, Brian B. Dale, Alyssa Baptista, Crystal Connor, Jasmine Conner, Sharon R. Constantine, Kimberly Dowling, Simone S. Dupre, Allison R. Ayala, Meagan L. Huggins, Seidu Inusah, Paula A. Johnson, Brenda L. Loggins, Shannon L. McClellan, Michele Melia, Eureca Battle, Cynthia R. Stockdale, Danielle Stanley, Glenn Jaffe, Brannon Balsley, Michael Barbas, Russell Burns, Dee Busian, Ryan Ebersohl, Cynthia Heydary, Sasha McEwan, Justin Myers, Amanda Robertson, Kelly Shields, Garrett Thompson, Katrina Winter, Ellen Young, Matthew D. Davis, Yijun Huang, Barbara Blodi, Amitha Domalpally, James Reimers, Pamela Vargo, Hugh Wabers, Dawn Myers, Daniel Lawrence, James Allan, Andrew Antoszyk, Scott Friedman, Ingrid U. Scott, Eleanor Schron, Donald F. Everett, Päivi H. Miskala, John Connett, Gary Abrams, Deborah R. Barnbaum, Harry Flynn, Ruth S. Weinstock, Charles P. Wilkinson, Stephen Wisniewski, Saul Genuth, Robert Frank, Frederick L. Ferris, Glenn J. Jaffe, Abdhish Bhavsar, Joseph Googe, Andreas Lauer, and Ashley McClain

Subjects
Male, Vascular Endothelial Growth Factor A, medicine.medical_specialty, Visual acuity, genetic structures, Bevacizumab, Recombinant Fusion Proteins, Visual Acuity, 030232 urology & nephrology, Angiogenesis Inhibitors, Enzyme-Linked Immunosorbent Assay, Gastroenterology, Macular Edema, Article, law.invention, 03 medical and health sciences, chemistry.chemical_compound, 0302 clinical medicine, Randomized controlled trial, law, Ranibizumab, Internal medicine, medicine, Humans, Stroke, Aflibercept, Diabetic Retinopathy, business.industry, Middle Aged, medicine.disease, Confidence interval, Vascular endothelial growth factor, Ophthalmology, Receptors, Vascular Endothelial Growth Factor, Treatment Outcome, chemistry, Intravitreal Injections, Retreatment, 030221 ophthalmology & optometry, Female, medicine.symptom, business, Tomography, Optical Coherence, Follow-Up Studies, medicine.drug
Abstract

PURPOSE: Assess systemic vascular endothelial growth factor-A (VEGF) levels after treatment with intravitreous aflibercept, bevacizumab or ranibizumab. DESIGN: Comparative-effectiveness trial with participants randomly assigned to 2-mg aflibercept, 1.25-mg bevacizumab, or 0.3-mg ranibizumab following a retreatment algorithm. PARTICIPANTS: Participants with available plasma samples (N=436) METHODS: Plasma samples were collected before injections at baseline, 4-week, 52-week and 104-week visits. In a pre-planned secondary analysis, systemic free-VEGF levels from an ELISA immunoassay were compared across anti-VEGF agents and correlated with systemic side effects. MAIN OUTCOME MEASURES: Changes in the natural log (ln) of plasma VEGF levels. RESULTS: Baseline free-VEGF levels were similar across all 3 groups. At 4 weeks, mean ln(VEGF) changes were −0.30±0.61, −0.31±0.54, −0.02±0.44 pg/ml for the aflibercept, bevacizumab, and ranibizumab groups, respectively. The adjusted differences between treatment groups (adjusted CI; P-value) were −0.01 (−0.12, +0.10; P=0.89), −0.31 (−0.44, −0.18; P

Published
2018

39. Disentangling genetic structure for genetic monitoring of complex populations

Author

Frederick I. Archer, Brook G. Milligan, Robin S. Waples, Brian K. Hand, Elizabeth M. Kierepka, and Anne-Laure Ferchaud

Subjects
0106 biological sciences, 0301 basic medicine, Animal population density, Population, isolation by distance, Biology, 010603 evolutionary biology, 01 natural sciences, Coalescent theory, 03 medical and health sciences, Effective population size, multiple merger coalescent, Genetics, Econometrics, Λ‐coalescent, dispersal, education, Ecology, Evolution, Behavior and Systematics, Isolation by distance, density, education.field_of_study, genetic monitoring, population structure, spatial Λ‐Fleming‐Viot model, 030104 developmental biology, Perspective, Genetic structure, Biological dispersal, General Agricultural and Biological Sciences, Genetic monitoring
Abstract

Genetic monitoring estimates temporal changes in population parameters from molecular marker information. Most populations are complex in structure and change through time by expanding or contracting their geographic range, becoming fragmented or coalescing, or increasing or decreasing density. Traditional approaches to genetic monitoring rely on quantifying temporal shifts of specific population metrics—heterozygosity, numbers of alleles, effective population size—or measures of geographic differentiation such as FST. However, the accuracy and precision of the results can be heavily influenced by the type of genetic marker used and how closely they adhere to analytical assumptions. Care must be taken to ensure that inferences reflect actual population processes rather than changing molecular techniques or incorrect assumptions of an underlying model of population structure. In many species of conservation concern, true population structure is unknown, or structure might shift over time. In these cases, metrics based on inappropriate assumptions of population structure may not provide quality information regarding the monitored population. Thus, we need an inference model that decouples the complex elements that define population structure from estimation of population parameters of interest and reveals, rather than assumes, fine details of population structure. Encompassing a broad range of possible population structures would enable comparable inferences across biological systems, even in the face of range expansion or contraction, fragmentation, or changes in density. Currently, the best candidate is the spatial Λ‐Fleming‐Viot (SLFV) model, a spatially explicit individually based coalescent model that allows independent inference of two of the most important elements of population structure: local population density and local dispersal. We support increased use of the SLFV model for genetic monitoring by highlighting its benefits over traditional approaches. We also discuss necessary future directions for model development to support large genomic datasets informing real‐world management and conservation issues.

Published
2018

40. Biomass Allocation, Plantlet Survival, and Chemical Control of the Invasive Chandelier Plant (Kalanchoe delagoensis) (Crassulaceae)

Author

Jordan Golubov, Azalea Guerra-García, María C. Mandujano, Abraham Cruz, Diego Barrales-Alcalá, Magda Argueta-Guzmán, Jose A. Arévalo-Ramírez, and Brook G. Milligan

Subjects
0106 biological sciences, Biomass (ecology), 010604 marine biology & hydrobiology, Plant Science, Biology, Kalanchoe, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Invasive species, Sexual reproduction, Crassulaceae, Plantlet, Horticulture, chemistry.chemical_compound, chemistry, Glyphosate, Shoot
Abstract

Alien invasive species have strategies that can maintain fitness in a variety of environments. This flexibility is associated with environmental tolerance in several traits, such as allocation of resources to shoots versus roots, clonal versus sexual reproduction, and survival of seedlings. These traits were explored in the chandelier plant (Kalanchoe delagoensis Eckl. & Zeyh.), which has invasive populations in several countries. Light and water tolerance and herbicide treatments were tested on plantlet survival. Plantlet survival in the most extreme cases (full sunlight and no watering) was close to 30%, whereas in less severe conditions (water and shaded), it was close to 100%. Stress conditions triggered the onset of plantlet production from the margin of leaves, which increased clonality. Biomass was allocated primarily to aboveground structures. Although all herbicides resulted in high plantlet mortality (>85%), only 2,4-D and glyphosate+2,4-D amine achieved the maximum recorded mortality a few days after the chemical application. The high tolerance of K. delagoensis plantlets to varying conditions shows that under stress, plantlet production is enhanced as survival of established individuals decreases. Biomass is primarily aboveground, which can potentially alter nitrogen and carbon in poor arid environments, and the proportion of the biomass assigned to belowground roots increased with an increase in sunlight received. Even though the chemical treatments 2,4-D and glyphosate+2,4-D amine have been shown to be the only effective treatments, the 2,4-D treatment may be the most viable (cost+quantity) to reduce the propagation of K. delagoensis. Plantlets have become the main reason for population persistence, partially due to the plant’s environmental tolerance and ability to reproduce asexually in short time periods. Susceptibility of plantlets to the two herbicides presents a means to adequately manage invasions of K. delagoensis in Mexico.

Published
2018

41. Range-wide assessment of a SNP panel for individualization and geolocalization of bigleaf maple (Acer macrophyllum Pursh)

Author

Laura L. Hauck, Meaghan Parker-Forney, Brook G. Milligan, Jenélle Dowling, Richard Cronn, Adventure Scientists, and Kristen N. Finch

Subjects
Maple, Ecology, biology, Range (biology), Veterinary medicine, Agena MassARRAY®, Acer macrophyllum, engineering.material, biology.organism_classification, Horticulture, Bigleaf maple, Timber poaching, SF600-1100, engineering, QH540-549.5
Abstract

Illegal logging is a worldwide problem that degrades ecosystems, and even low-risk markets like the United States report ~1000 significant hardwood timber theft cases per year. Due to its high value, bigleaf maple (Acer macrophyllum Pursh) is a common target of timber theft in western North America. Using samples from Washington, USA, a single nucleotide polymorphism [SNP] assay was recently developed to facilitate timber poaching investigations in this species based on the single base extension Agena MassARRAY® genotyping system and 133 loci. Our study expands earlier evaluations to include the full 2000 km latitudinal range of bigleaf maple, using 1142 samples collected from California, USA to British Columbia, CAN. Populations in this study are equivalent to level 3 ecoregions, with sample sizes ranging from 28 (California Coast) to 191 (Washington Coast). Wood-derived DNA concentrations between 0.24 and 6 ng/μL yielded SNP call rates >92%, and DNA concentrations within this range did not influence genotyping call rates. DNA from different tissues showed a weak but significant difference in call rate, with DNA from wood showing a slightly higher call rate than leaves (99.4% vs 97.9%, respectively). Analysis of 108 sample replicates showed that missing genotypes occurred at 0.165% of all loci, and that allelic drop-outs and drop-ins each occurred at frequencies of 0.022% and 0.032%, respectively. Population-specific genotype profile probabilities for Pacific Northwest ecoregions were lower than 1.9×10−33; profile probabilities are higher (less powerful) in Californian trees due to lower variability across these SNP loci. Conversely, the geographic origin of trees from Southern Californian ecoregions could be predicted with lower error (8.5–11.7%) than trees from the Pacific Northwest (36–80%), based on random forest classification. This study provides a rich database for forensic individualization of bigleaf maple across its complete range in western North America.

Published
2021

46. Maximum-likelihood estimation of relatedness

Author

Milligan, Brook G.

Subjects
Domestic relations -- Models, Domestic relations -- Genetic aspects, Domestic relations -- Statistics, Biological sciences
Abstract

Relatedness between individuals is central to many studies in genetics and population biology. A variety of estimators have been developed to enable molecular marker data to quantify relatedness. Despite this, no effort has been given to characterize the traditional maximum-likelihood estimator in relation to the remainder. This article quantifies its statistical performance under a range of biologically relevant sampling conditions. Under the same range of conditions, the statistical performance of five other commonly used estimators of relatedness is quantified. Comparison among these estimators indicates that the traditional maximum-likelihood estimator exhibits a lower standard error under essentially all conditions. Only for very large amounts of genetic information do most of the other estimators approach the likelihood estimator. However, the likelihood estimator is more biased than any of the others, especially when the amount of genetic information is low or the actual relationship being estimated is near the boundary of the parameter space. Even under these conditions, the amount of bias can be greatly reduced, potentially to biologically irrelevant levels, with suitable genetic sampling. Additionally, the likelihood estimator generally exhibits the lowest root mean-square error, an indication that the bias in fact is quite small. Alternative estimators restricted to yield only biologically interpretable estimates exhibit lower standard errors and greater bias than do unrestricted ones, but generally do not improve over the maximum-likelihood estimator and in some cases exhibit even greater bias. Although some nonlikelihood estimators exhibit better performance with respect to specific metrics under some conditions, none approach the high level of performance exhibited by the likelihood estimator across all conditions and all metrics of performance.

Published
2003

48. Feasibility of using low-cost markerless motion capture for assessing functional outcomes after lower extremity musculoskeletal cancer surgery.

Author

Sherron Furtado, Brook Galna, Alan Godfrey, Lynn Rochester, and Craig Gerrand

Subjects
Medicine, Science
Abstract

BackgroundPhysical limitations are frequent and debilitating after sarcoma treatment. Markerless motion capture (MMC) could measure these limitations. Historically expensive cumbersome systems have posed barriers to clinical translation.Research questionCan inexpensive MMC [using Microsoft KinectTM] assess functional outcomes after sarcoma surgery, discriminate between tumour sub-groups and agree with existing assessments?MethodsWalking, unilateral stance and kneeling were measured in a cross-sectional study of patients with lower extremity sarcomas using MMC and standard video. Summary measures of temporal, balance, gait and movement velocity were derived. Feasibility and early indicators of validity of MMC were explored by comparing MMC measures i) between tumour sub-groups; ii) against video and iii) with established sarcoma tools [Toronto Extremity Salvage Score (TESS)), Musculoskeletal Tumour Rating System (MSTS), Quality of life-cancer survivors (QoL-CS)]. Statistical analysis was conducted using SPSS v19. Tumour sub-groups were compared using Mann-Whitney U tests, MMC was compared to existing sarcoma measures using correlations and with video using Intraclass correlation coefficient agreement.ResultsThirty-four adults of mean age 43 (minimum value-maximum value 19-89) years with musculoskeletal tumours in the femur (19), pelvis/hip (3), tibia (9), or ankle/foot (3) participated; 27 had limb sparing surgery and 7 amputation. MMC was well-tolerated and feasible to deliver. MMC discriminated between surgery groups for balance (pSignificanceIn this first study world-wide, investigating the use of MMC after sarcoma surgery, MMC was found to be acceptable and feasible to assess functional outcomes in this cancer population. MMC demonstrated early indicators of validity and also provided new knowledge that functional impairments are related to balance during unilateral stance and kneeling, gait and movement velocity during kneeling and these outcomes in turn are related to disabilities and QoL. This highlighted important relationships between different functional outcomes and QoL, providing valuable information for delivering personalised rehabilitation. After completing future validation work in a larger study, this approach can offer promise in clinical settings. Low-cost MMC shows promise in assessing patient's impairments in the hospitals or their homes and guiding clinical management and targeted rehabilitation based on novel MMC outcomes affected, therefore providing an opportunity for delivering personalised exercise programmes and physiotherapy care delivery for this rare cancer.

Published
2024
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