Search

Your search keyword '"Stegner, M. Allison"' showing total 23 results
Start Over Author "Stegner, M. Allison"
23 results on '"Stegner, M. Allison"'

1. Palaeontological signatures of the Anthropocene are distinct from those of previous epochs

Author

Williams, Mark, Zalasiewicz, Jan, Barnosky, Anthony D., Leinfelder, Reinhold, Head, Martin J., Waters, Colin N., McCarthy, Francine M.G., Cearreta, Alejandro, Aldridge, David C., McGann, Mary, Hamilton, Paul B., Summerhayes, Colin P., Syvitski, Jaia, Zinke, Jens, Cundy, Andrew B., Fiałkiewicz-Kozieł, Barbara, McNeill, J.R., Kuwae, Michinobu, Rose, Neil L., Turner, Simon D., Saito, Yoshiki, Wagreich, Michael, Stegner, M. Allison, Yasuhara, Moriaki, Han, Yongming, Wrisdale, Amy, Holmes, Rachael, and Berrio, Juan Carlos

Published
2024
Full Text
View/download PDF

3. Merging paleobiology with conservation biology to guide the future of terrestrial ecosystems

Author

Barnosky, Anthony D, Hadly, Elizabeth A, Gonzalez, Patrick, Head, Jason, Polly, P David, Lawing, A Michelle, Eronen, Jussi T, Ackerly, David D, Alex, Ken, Biber, Eric, Blois, Jessica, Brashares, Justin, Ceballos, Gerardo, Davis, Edward, Dietl, Gregory P, Dirzo, Rodolfo, Doremus, Holly, Fortelius, Mikael, Greene, Harry W, Hellmann, Jessica, Hickler, Thomas, Jackson, Stephen T, Kemp, Melissa, Koch, Paul L, Kremen, Claire, Lindsey, Emily L, Looy, Cindy, Marshall, Charles R, Mendenhall, Chase, Mulch, Andreas, Mychajliw, Alexis M, Nowak, Carsten, Ramakrishnan, Uma, Schnitzler, Jan, Das Shrestha, Kashish, Solari, Katherine, Stegner, Lynn, Stegner, M Allison, Stenseth, Nils Chr, Wake, Marvalee H, and Zhang, Zhibin

Subjects
Environmental Sciences, Ecological Applications, Ecology, Biological Sciences, Life on Land, Animals, Biodiversity, Climate Change, Conservation of Natural Resources, Endangered Species, Environmental Pollution, Extinction, Biological, Gorilla gorilla, Humans, Introduced Species, Policy, Population Dynamics, General Science & Technology
Abstract

Conservation of species and ecosystems is increasingly difficult because anthropogenic impacts are pervasive and accelerating. Under this rapid global change, maximizing conservation success requires a paradigm shift from maintaining ecosystems in idealized past states toward facilitating their adaptive and functional capacities, even as species ebb and flow individually. Developing effective strategies under this new paradigm will require deeper understanding of the long-term dynamics that govern ecosystem persistence and reconciliation of conflicts among approaches to conserving historical versus novel ecosystems. Integrating emerging information from conservation biology, paleobiology, and the Earth sciences is an important step forward on the path to success. Maintaining nature in all its aspects will also entail immediately addressing the overarching threats of growing human population, overconsumption, pollution, and climate change.

Published
2017

5. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs)

Author

Barnosky, Anthony D, Holmes, Michael, Kirchholtes, Renske, Lindsey, Emily, Maguire, Kaitlin C, Poust, Ashley W, Stegner, M Allison, Sunseri, Jun, Swartz, Brian, Swift, Jillian, Villavicencio, Natalia A, and Wogan, Guinevere OU

Subjects
Life on Land, Anthropocene, biochronology, Holocene, land mammal ages, mammals, paleontology, Analytical Chemistry, Environmental Science and Management, Policy and Administration
Abstract

Human impacts have left and are leaving distinctive imprints in the geological record. Here we show that in North America, the human-caused changes evident in the mammalian fossil record since c. 14,000 years ago are as pronounced as earlier faunal changes that subdivide Cenozoic epochs into the North American Land Mammal Ages (NALMAs). Accordingly, we define two new North American Land Mammal Ages, the Santarosean and the Saintagustinean, which subdivide Holocene time and complete a biochronologic system that has proven extremely useful in dating terrestrial deposits and in revealing major features of faunal change through the past 66 million years. The new NALMAs highlight human-induced changes to the Earth system, and inform the debate on whether or not defining an Anthropocene epoch is justified, and if so, when it began.

Published
2014

9. The Searsville Lake Site (California, USA) as a candidate Global Boundary Stratotype Section and Point for the Anthropocene Series

Author

Stegner, M Allison, primary, Hadly, Elizabeth A, additional, Barnosky, Anthony D, additional, La Selle, SeanPaul, additional, Sherrod, Brian, additional, Anderson, R Scott, additional, Redondo, Sergio A, additional, Viteri, Maria C, additional, Weaver, Karrie L, additional, Cundy, Andrew B, additional, Gaca, Pawel, additional, Rose, Neil L, additional, Yang, Handong, additional, Roberts, Sarah L, additional, Hajdas, Irka, additional, Black, Bryan A, additional, and Spanbauer, Trisha L, additional

Published
2023
Full Text
View/download PDF

10. sj-docx-1-anr-10.1177_20530196221144098 – Supplemental material for The Searsville Lake Site (California, USA) as a candidate Global Boundary Stratotype Section and Point for the Anthropocene Series

Author

Stegner, M Allison, Hadly, Elizabeth A, Barnosky, Anthony D, La Selle, SeanPaul, Sherrod, Brian, Anderson, R Scott, Redondo, Sergio A, Viteri, Maria C, Weaver, Karrie L, Cundy, Andrew B, Gaca, Pawel, Rose, Neil L, Yang, Handong, Roberts, Sarah L, Hajdas, Irka, Black, Bryan A, and Spanbauer, Trisha L

Subjects
Geography
Abstract

Supplemental material, sj-docx-1-anr-10.1177_20530196221144098 for The Searsville Lake Site (California, USA) as a candidate Global Boundary Stratotype Section and Point for the Anthropocene Series by M Allison Stegner, Elizabeth A Hadly, Anthony D Barnosky, SeanPaul La Selle, Brian Sherrod, R Scott Anderson, Sergio A Redondo, Maria C Viteri, Karrie L Weaver, Andrew B Cundy, Pawel Gaca, Neil L Rose, Handong Yang, Sarah L Roberts, Irka Hajdas, Bryan A Black and Trisha L Spanbauer in The Anthropocene Review

Published
2023
Full Text
View/download PDF

11. Lessons for conservation from beneath the pavement

Author

Mychajliw, Alexis M., primary, Ellwood, Elizabeth R., additional, Alagona, Peter S., additional, Anderson, R. Scott, additional, Balisi, Mairin A., additional, Biber, Eric, additional, Brown, Justin L., additional, George, Jessie, additional, Hendy, Austin J. W., additional, Higgins, Lila, additional, Hofman, Courtney A., additional, Leger, Ashley, additional, Ordeñana, Miguel A., additional, Pauly, Gregory B., additional, Putman, Breanna J., additional, Randall, John M., additional, Riley, Seth P. D., additional, Shultz, Allison J., additional, Stegner, M. Allison, additional, Wake, Thomas A., additional, and Lindsey, Emily L., additional

Published
2022
Full Text
View/download PDF

13. Planetary‐scale change to the biosphere signalled by global species translocations can be used to identify the Anthropocene

Author

Williams, Mark, primary, Leinfelder, Reinhold, additional, Barnosky, Anthony D., additional, Head, Martin J., additional, McCarthy, Francine M. G., additional, Cearreta, Alejandro, additional, Himson, Stephen, additional, Holmes, Rachael, additional, Waters, Colin N., additional, Zalasiewicz, Jan, additional, Turner, Simon, additional, McGann, Mary, additional, Hadly, Elizabeth A., additional, Stegner, M. Allison, additional, Pilkington, Paul Michael, additional, Kaiser, Jérôme, additional, Berrio, Juan Carlos, additional, Wilkinson, Ian P., additional, Zinke, Jens, additional, and Delong, Kristine L., additional

Published
2022
Full Text
View/download PDF

15. The Searsville Lake Site (California, USA) as a candidate Global boundary Stratotype Section and Point for the Anthropocene series

Author

Waters, Colin N., Turner, Simon D., Zalasiewicz, Jan, Head, Martin J., Stegner, M Allison, Hadly, Elizabeth A, Barnosky, Anthony D, La Selle, SeanPaul, Sherrod, Brian, Anderson, R Scott, Redondo, Sergio A, Viteri, Maria C, Weaver, Karrie L, Cundy, Andrew B, Gaca, Pawel, Rose, Neil L, Yang, Handong, Roberts, Sarah L, Hajdas, Irka, Black, Bryan A, and Spanbauer, Trisha L

Abstract

Cores from Searsville Lake within Stanford University’s Jasper Ridge Biological Preserve, California, USA, are examined to identify a potential GSSP for the Anthropocene: core JRBP2018-VC01B (944.5 cm-long) and tightly correlated JRBP2018-VC01A (852.5 cm-long). Spanning from 1900 CE ± 3 years to 2018 CE, a secure chronology resolved to the sub-annual level allows detailed exploration of the Holocene-Anthropocene transition. We identify the primary GSSP marker as first appearance of 239,240Pu (372–374 cm) in JRBP2018-VC01B and designate the GSSP depth as the distinct boundary between wet and dry season at 366 cm (6 cm above the first sample containing 239,240Pu) and corresponding to October-December 1948 CE. This is consistent with a lag of 1–2 years between ejection of 239,240Pu into the atmosphere and deposition. Auxiliary markers include: first appearance of 137Cs in 1958; late 20th-century decreases in δ15N; late 20th-century elevation in SCPs, Hg, Pb, and other heavy metals; and changes in abundance and presence of ostracod, algae, rotifer and protozoan microfossils. Fossil pollen document anthropogenic landscape changes related to logging and agriculture. As part of a major university, the Searsville site has long been used for research and education, serves users locally to internationally, and is protected yet accessible for future studies and communication about the Anthropocene.Plain Word Summary The Global boundary Stratotype Section and Point (GSSP) for the proposed Anthropocene Series/Epoch is suggested to lie in sediments accumulated over the last ~120 years in Searsville Lake, Woodside, California, USA. The site fulfills all of the ideal criteria for defining and placing a GSSP. In addition, the Searsville site is particularly appropriate to mark the onset of the Anthropocene, because it was anthropogenic activities–the damming of a watershed–that created a geologic record that now preserves the very signals that can be used to recognize the Anthropocene worldwide.

Published
2023
Full Text
View/download PDF

19. Merging paleobiology with conservation biology to guide the future of terrestrial ecosystems

Author

Barnosky, Anthony D., Hadly, Elizabeth A., Gonzalez, Patrick, Head, Jason, Polly, P. David, Lawing, A. Michelle, Eronen, Jussi T., Ackerly, David D., Alex, Ken, Biber, Eric, Blois, Jessica, Brashares, Justin, Ceballos, Gerardo, Davis, Edward, Dietl, Gregory P., Dirzo, Rodolfo, Doremus, Holly, Fortelius, Mikael, Greene, Harry W., Hellmann, Jessica, Hickler, Thomas, Jackson, Stephen T., Kemp, Melissa, Koch, Paul L., Kremen, Claire, Lindsey, Emily L., Looy, Cindy, Marshall, Charles R., Mendenhall, Chase, Mulch, Andreas, Mychajliw, Alexis M., Nowak, Carsten, Ramakrishnan, Uma, Schnitzler, Jan, Das Shrestha, Kashish, Solari, Katherine, Stegner, Lynn, Stegner, M. Allison, Stenseth, Nils Chr, Wake, Marvalee H., Zhang, Zhibin, Department of Geosciences and Geography, and Evolutionary Palaeontology group

Subjects
BIODIVERSITY CONSERVATION, CLIMATE-CHANGE, AMAZON, MAMMALIAN RESPONSE, 1181 Ecology, evolutionary biology, CONSERVING NATURES STAGE, SPECIES DISTRIBUTIONS, NORTH-AMERICA, ECOLOGY, FOREST, TRAITS, 1172 Environmental sciences
Abstract

Conservation of species and ecosystems is increasingly difficult because anthropogenic impacts are pervasive and accelerating. Under this rapid global change, maximizing conservation success requires a paradigm shift from maintaining ecosystems in idealized past states toward facilitating their adaptive and functional capacities, even as species ebb and flow individually. Developing effective strategies under this new paradigm will require deeper understanding of the long-term dynamics that govern ecosystem persistence and reconciliation of conflicts among approaches to conserving historical versus novel ecosystems. Integrating emerging information from conservation biology, paleobiology, and the Earth sciences is an important step forward on the path to success. Maintaining nature in all its aspects will also entail immediately addressing the overarching threats of growing human population, overconsumption, pollution, and climate change.

Published
2017

23. Editorial Commentary: Recovery After Anterior Cruciate Ligament Reconstruction Is Optimal About 85% of the Time.

Author

Stegner MA and Gilmer BB

Subjects
Anterior Cruciate Ligament surgery, Humans, Knee Joint surgery, Reoperation, Anterior Cruciate Ligament Injuries surgery, Anterior Cruciate Ligament Reconstruction, Knee Injuries surgery
Abstract

Recovery after anterior cruciate ligament reconstruction is optimal about 85% of the time. Revision surgery, psychiatric history, preoperative chronic knee pain, and subsequent knee injury are associated with suboptimal recovery patterns. Sophisticated growth models can analyze patient recovery trajectories. Growth mixture models (GMM) treat a whole cohort as a single group and characterize that group over time, for example, over the course of knee injury and subsequent recovery after surgical reconstruction. Latent class growth analysis is a subcategory of GMM that sorts the cohort into subgroups and allows analysis regarding groups having, for example, standard, delayed, and suboptimal recoveries. This theoretically allows a physician to anticipate which patients are likely to follow a suboptimal trajectory of recovery, to track that recovery based on the model, and to form a treatment plan accordingly., (Copyright © 2022 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.)

Published
2022
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results