1,180 research outputs found
Vivian-Felde/Diatom_diversity_Vydrino_Lake_Baikal: Public release
No full textTitle
Long-term trends in diatom diversity and palaeoproductivity: a 16 000-year multidecadal study from Lake Baikal, southern Siberia.
Authors
Anson W. Mackay, Vivian A. Felde, David W. Morley, Natalia Piotrowska, Patrick Rioual, Alistair W. R. Seddon, and George E. A. Swann
Corresponding author
Anson W. Mackay ([email protected])
Description
This repo contains R code and data to calculate diatom diversity and investigate the diversity – palaeoproductivity relationship on the Vydrino shoulder of Lake Baikal during the Late Glacial and Holocene.
The diatom and metadata can be downloaded from NOAA https://doi.org/10.25921/q6v1-5q02.
See
Anson W. Mackay, Vivian A. Felde, David W. Morley, Natalia Piotrowska, Patrick Rioual, Alistair W. R. Seddon, and George E. A. Swann 2022. Long-term trends in diatom diversity and palaeoproductivity: a 16 000-year multidecadal study from Lake Baikal, southern Siberia. Clim. Past, 18, 1-18, https://doi.org/10.5194/cp-2020-70.
Abstract
Biological diversity is inextricably linked to community stability and ecosystem functioning, but our understanding of these relationships in freshwater ecosystems is largely based on short-term observational, experimental, and modelling approaches. Using a multidecadal diatom record for the past ca. 16 000 years from Lake Baikal, we investigate how diversity and palaeoproductivity have responded to climate change during periods of both rapid climate fluctuation and relative climate stability. We show dynamic changes in diatom communities during the past 16 000 years, with decadal shifts in species dominance punctuating millennial-scale seasonal trends. We describe for the first time in Lake Baikal a gradual shift from spring to autumnal diatom communities that started during the Younger Dryas and peaked during the Late Holocene, which likely represents orbitally driven ecosystem responses to long-term changes in seasonality. Using a multivariate classification tree, we show that trends in planktonic and tychoplanktonic diatoms broadly reflect both long-term climatic changes associated with the demise of Northern Hemisphere ice sheets and abrupt climatic changes associated with, for example, the Younger Dryas stadial. Indeed, diatom communities are most different before and after the boundary between the Early and Middle Holocene periods of ca. 8.2 cal kyr BP, associated with the presence and demise of Northern Hemisphere ice sheets respectively. Diatom richness and diversity, estimated using Hill's species numbers, are also shown to be very responsive to periods characterized by abrupt climate change, and using knowledge of diatom autecologies in Lake Baikal, diversity trends are interpreted in 30
terms of resource availability. Using diatom biovolume accumulation rates (BVARs; μm^3 cm^-2 yr^-1), we show that spring diatom crops dominate palaeoproductivity for nearly all of our record, apart from a short period during the Late Holocene, when autumnal productivity dominated between 1.8–1.4 cal kyr BP. Palaeoproductivity was especially unstable during the Younger Dryas, reaching peak rates of 18.3 x 10^3 μm^3 cm^-2 yr^-1 at ca. 12.3 cal kyr BP. Generalized additive models (GAMs), which explore productivity–diversity relationships (PDRs) during pre-defined climate periods, reveal complex relationships. The strongest statistical evidence for GAMs were found during the Younger Dryas, the Early Holocene, and the Late Holocene, i.e. periods of rapid climate change. We account for these differences in terms of climate-mediated resource availability, and the ability of endemic diatom species in Lake Baikal to adapt to extreme forms of living in this unique ecosystem. Our analyses offer insight into how productivity–diversity relationships may develop in the future under a warming climate
Vivian Henderson Papers
No full textDr. Vivian Wilson Henderson was the 18th president of Clark College from 1965 until his death in 1976. A native of Bristol, Tennessee, Henderson completed a Bachelor of Science degree in Economics from North Carolina College in Durham in 1947. He earned his Master of Arts and Doctor of Philosophy degrees in Economics from the University of Iowa in 1949 and 1952, respectively. The Vivian Wilson Henderson Papers document Dr. Henderson's personal and professional activities spanning the years 1940 to 1976. The photographs in the collection date primarily from the 1960s and document Henderson's activities at Clark College as well as his family life. Photographs of Dr. Henderson's wife, Anna, and children are included.
At the AUC Robert W. Woodruff Library we are always striving to improve our digital collections. We welcome additional information about people, places, or events depicted in any of the works in this collection. To submit information, please contact us at [email protected].
El Tlacuache Núm. 485 (2011). 485 Año 11 (2011) septiembre. El Tlacuache
No full textPresentación por Eduardo Corona Martínez. -El evolucionismo y la arqueología. Encuentros y desencuentros por Vivian Scheinsohn
Data de la huella dactilar
No full textEn toda investigación de un hecho punible se presenta la siguiente situación, alguien ha hecho algo en un tiempo y lugar, de un modo y de una forma y por una determinada razón, generando el siguiente interrogante; quién fue, cuándo y con qué lo realizó y porqué. Lo que contesta todas estas preguntas es la investigación científica del hecho y un buen relevamiento de este, como así la obtención de huellas e indicios proporcionan la información necesaria para poder dar respuesta a varias de estas preguntas. Por ello la meta final de la labor pericial consiste en la recuperación de ese material probatorio, siendo esta la etapa principal en una investigación in situ.
Es frecuente que, ante un requerimiento judicial, se pregunte la data de producida una huella dactilar relacionada con un hecho delictivo, es por ello que, se le solicita al perito que evacue tal inquietud. de allí nace la necesidad de contar con un patrón referencial de análisis al respecto, pudiéndose estimar de esta manera si el aposentamiento es reciente o no.Fil: Rodriguez Miguelez, Vivian Solange. Universidad FASTA. Facultad de Ciencias Jurídicas; Argentina.Fil: Abadi, Andrea Paola. Universidad FASTA. Facultad de Ciencias Jurídicas; Argentina.Fil: Abedini, Javier. Universidad FASTA. Facultad de Ciencias Jurídicas; Argentina.Fil: Ramirez, Amalia. Universidad FASTA. Facultad de Ciencias Jurídicas; Argentina.Fil: Gacio, Hernán. Universidad FASTA. Facultad de Ciencias Jurídicas; Argentina.Fil: Cariac, Eugenia. Universidad FASTA. Facultad de Ciencias Jurídicas; Argentina
Vivian Castleberry
No full textVivian Castleberry, a native Texas, was a graduate of Southern Methodist University (SMU) and became the first female editor of the Dallas Times Herald in 1957. During her 28-year tenure at the Herald, Ms. Castleberry won numerous journalism awards. She took an early retirement to pursue peace activist efforts. She co-founded the Women's Center of Dallas and The Dallas Women's Foundation, and founded Peacemakers Incorporated. She was inducted into the Texas Women's Hall of Fame in 1984. The photographer, Dian Malouf is a professional photographer, author, and internationally known jewelry designer. She is a native Texan and attended Southern Methodist University
Estructuración de un servicio de información regional de la cadena de la papa coordinado por los comités asesores regionales de investigación -Cotaris de Cevipapa
No full textIP 3270-07-13192Ramirez Moreno ; textos basicos Pedro David Porras Rodriguez.--Bogotá :Cevipapa, 2003. -- 28 p. : il. ; 16;CARTILLA(S): Cartilla No.1. Manejo integrado de plagas y enfermedades (MIPE) en el cultivo de la papa / Ivan;Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina PinzonQuintero, Vivian Johana Ardila Vega, Patricia;cm. -- Cartilla No.2. Manejo racional de suelos y labranzaminima en el cultivo de la papa / Ivan Gutierrez;Restrepo, Jose Rafael Caro Cruz, Carolina Pinzon Quintero,Vivian Johana Ardila Vega, Patricia Ramirez Moreno; textos basicos Pedro David Porras Rodriguez. -- Bogotá :Cevipapa, 2003.-- 23 p. : il. ; 16 cm. -- Cartilla;No. 3. Fertilizacion en el cultivo de la papa / Ivan GutierrezRestrepo, Jose Rafael Caro Cruz, Carolina;Pinzon Quintero, Vivian Johana Ardila Vega, Patricia Ramirez Moreno ; textos basicos Pedro David Porras;Rodriguez. -- Bogotá : Cevipapa, 2003. -- 31 p. : il. ; 16cm.-'- CartillaNo. 4. Uso regional de plaguicidas;y calibracion de equipos para su aplicacion en el cultivode lapapa / Ivan Gutierrez Restrepo, Jose Rafael;Caro Cruz, Carolina Pinzon Quintero, Vivian Johana ArdilaVega,Patricia Ramirez Moreno ; textos basicos Pedro;David Porras Rodriguez. -- Bogotá : Cevipapa, 2003. -- 26p. :il. ; 16 cm. -- Cartilla No. 5. Como mejorar;las condiciones de mercadeo de la papa / Ivan Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina Pinzon;Quintero, Vivian Johana Ardila Vega, Patricia Ramirez Moreno ;textos basicos Pedro David Porras Rodriguez. --;Bogotá : Cevipapa, 2003. -- 22 p. : il. ; 16 cm. -- Cartilla No.6. Manejode semilla certificada de papa /;Ivan Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina PinzonQuintero,Vivian Johana Ardila Vega, Patricia;Ramirez Moreno ; textos basicos Pedro David Porras Rodriguez.--Bogotá :Cevipapa, 2003. -- 20 p. : il. ; 16;cm. -- Cartilla No. 7. Principios de asociatividad en el cultivode la papa ! manos a la obra ! / Ivan;Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina PinzonQuintero, Vivian Johana Ardila Vega, Patricia;Ramirez Moreno ; textos basicos Pedro David Porras Rodriguez.--Bogotá :Cevipapa, 2003. -- 29 p. : il. ; 21;cm
Estructuración de un servicio de información regional de la cadena de la papa coordinado por los comités asesores regionales de investigación -Cotaris de Cevipapa
No full textIP 3270-07-13192Ramirez Moreno ; textos basicos Pedro David Porras Rodriguez.--Bogotá :Cevipapa, 2003. -- 28 p. : il. ; 16;CARTILLA(S): Cartilla No.1. Manejo integrado de plagas y enfermedades (MIPE) en el cultivo de la papa / Ivan;Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina PinzonQuintero, Vivian Johana Ardila Vega, Patricia;cm. -- Cartilla No.2. Manejo racional de suelos y labranzaminima en el cultivo de la papa / Ivan Gutierrez;Restrepo, Jose Rafael Caro Cruz, Carolina Pinzon Quintero,Vivian Johana Ardila Vega, Patricia Ramirez Moreno; textos basicos Pedro David Porras Rodriguez. -- Bogotá :Cevipapa, 2003.-- 23 p. : il. ; 16 cm. -- Cartilla;No. 3. Fertilizacion en el cultivo de la papa / Ivan GutierrezRestrepo, Jose Rafael Caro Cruz, Carolina;Pinzon Quintero, Vivian Johana Ardila Vega, Patricia Ramirez Moreno ; textos basicos Pedro David Porras;Rodriguez. -- Bogotá : Cevipapa, 2003. -- 31 p. : il. ; 16cm.-'- CartillaNo. 4. Uso regional de plaguicidas;y calibracion de equipos para su aplicacion en el cultivode lapapa / Ivan Gutierrez Restrepo, Jose Rafael;Caro Cruz, Carolina Pinzon Quintero, Vivian Johana ArdilaVega,Patricia Ramirez Moreno ; textos basicos Pedro;David Porras Rodriguez. -- Bogotá : Cevipapa, 2003. -- 26p. :il. ; 16 cm. -- Cartilla No. 5. Como mejorar;las condiciones de mercadeo de la papa / Ivan Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina Pinzon;Quintero, Vivian Johana Ardila Vega, Patricia Ramirez Moreno ;textos basicos Pedro David Porras Rodriguez. --;Bogotá : Cevipapa, 2003. -- 22 p. : il. ; 16 cm. -- Cartilla No.6. Manejode semilla certificada de papa /;Ivan Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina PinzonQuintero,Vivian Johana Ardila Vega, Patricia;Ramirez Moreno ; textos basicos Pedro David Porras Rodriguez.--Bogotá :Cevipapa, 2003. -- 20 p. : il. ; 16;cm. -- Cartilla No. 7. Principios de asociatividad en el cultivode la papa ! manos a la obra ! / Ivan;Gutierrez Restrepo, Jose Rafael Caro Cruz, Carolina PinzonQuintero, Vivian Johana Ardila Vega, Patricia;Ramirez Moreno ; textos basicos Pedro David Porras Rodriguez.--Bogotá :Cevipapa, 2003. -- 29 p. : il. ; 21;cm
Anna and Kimberly Henderson, 1968
No full textView of Anna Henderson, wife of Dr. Vivian Wilson Henderson, with daughter Kimberly Anne Henderson
Survey : The design studio now
No full textIn this book for the AASA I provide a response to the question asked by the editors: What is Architecture Studio
A multidimensional ecological momentary assessment analysis of relations among negative affect, craving, and smoking cesation failure
No full textCessation failure occurs when smokers lapse within 24 hours of initiating a quit attempt. Although avoiding cessation failure is the first milestone of successful smoking cessation, little is known about the risk factors that influence cessation failure. This study examined whether or not multiple dimensions of real-time ratings of pre-quit negative affect and craving differentiated cessation failures from quit day abstainers. We hypothesized that cessation failures would experience greater severity, accelerated growth, and higher volatility in negative affect and craving in the two weeks preceding the target quit day than would successful abstainers. Results indicated that cessation failures and quit day abstainers did not differ in pre-quit dimensions of negative affect and craving. Those who failed to quit, however, experienced a greater reduction in craving after smoking during the 24 hours and four days before the target quit day than did successful quitters. The contingency between smoking and craving relief may indicate cessation failure risk in a way that pre-quit negative affect and craving trajectories and volatility do not.M.S.Includes bibliographical referencesby Vivian M Ye
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