Showing 5341 - 5350 of 5709 Items
Monteverde: Ecology and Conservation of a Tropical Cloud Forest - 2014 Updated Chapters
Date: 2014-01-01
Creator: Nalini M Nadkarni, Nathaniel T Wheelwright
Access: Open access
- The Monteverde Cloud Forest Reserve has captured the worldwide attention of biologists, conservationists, and ecologists and has been the setting for extensive investigation over the past 40 years. Roughly 40,000 ecotourists visit the Cloud Forest each year, and it is often considered the archetypal high-altitude rain forest. “Monteverde: Ecology and Conservation of a Tropical Cloud Forest”, edited by Nalini Nadkarni and Nathaniel T. Wheelwright (Oxford University Press, 2000 and Bowdoin’s Scholar’s Bookshelf. Book 1 ), features synthetic chapters and specific accounts written by more than 100 biologist and local residents, presenting in a single volume everything known in 2000 about the biological diversity of Monteverde, Costa Rica, and how to protect it. The new short chapters written in 2014 by original contributors, and presented here update and expand that knowledge through 2014.
Examining the Ability of Remote Sensing to Characterize Turfgrass Stress Physiology
Date: 2022-01-01
Creator: Benjamin Ross
Access: Open access
- Remote sensing of solar induced chlorophyll fluorescence (SIF) is a valuable tool in understanding the global carbon cycle. While SIF is highly correlated with photosynthesis at the ecosystem scale, the role that remote sensing of SIF can play at smaller scales is still unclear. The goal of my research was to investigate the ability of SIF to detect changes in pigmentation, photosynthesis, and energy partitioning at the grass canopy and leaf level in response to water stress and abscisic acid (ABA) hormone treatments. Both treatments immediately inhibited photosynthesis by limiting gas exchange through stomatal closure, but SIF declined gradually. Recovery of photosynthesis after alleviation of water stress was not reflected in remote measurements of SIF. I found that senescence in the tips of grasses had been driving changes in remote measurements, which affected remote measurements even when measured leaf-level gas exchange in the lower living tissue recovered. This heterogeneous senescence pattern contextualizes the disconnect between SIF and photosynthesis in stressed turfgrass.
Nuevas posibilidades para la subjetividad feminista en la literatura del Cono Sur
Date: 2022-01-01
Creator: Kate Elizabeth Tapscott
Access: Open access
- ¿Cómo es que se puede escapar verdaderamente de la opresión patriarcal? Esta investigación aborda a través de un análisis de la literatura de escritoras del Cono Sur el asunto complicado de la liberación bajo un sistema en constante mutación. En el primer capítulo, a partir de aportes teóricos de Freud, Josefina Ludmer y Homi Bhabha entre otros, analizo cuentos de Jorge Luis Borges, Silvina Ocampo, y Clarice Lispector cuyas protagonistas intentan resistir su condición de víctima con diversos grados de éxito. En el capítulo que sigue, exploro una tendencia reciente en la literatura de escritoras del Cono Sur que incorpora elementos del horror y lo gótico para desestabilizar una cosmovisión humanista y patriarcal. Incorporando la teoría de Gabriel Giorgi, Rosi Braidotti, y Julieta Yelin, investigo los efectos que los animales, los cuerpos, y la materia tienen en la expansión de la agencia feminista y discuto si ofrecen o no nuevas e inesperadas posibilidades para resistir el sistema.
"Proud Flesh and Blood": Phineas Fletcher, Gabriel Daniel, and Seventeenth-Century Theories of Embodiment
Date: 2022-01-01
Creator: Micaela Elanor Simeone
Access: Open access
- The human body was a site of discovery and redefinition in early modern Europe. This project traces the gradual arc from the mid-seventeenth century towards Cartesian notions of the body in the later part of the century through two fictions: Phineas Fletcher (1582-1650)’s The Purple Island (1633) and Gabriel Daniel (1649-1728)’s Voyage du Monde de Descartes (1690). This project views these two largely-overlooked texts as important literary works that represent the seventeenth century’s transformative debates about and explorations of the human body. I argue that Fletcher employs a dissective mode that embraces mind-body harmony while framing the human as both fragmented and whole. I then explore how Voyage du Monde de Descartes responds to an altogether different culture in the late seventeenth century, after Cartesian ideas extracted mind from body and no longer saw the body as a significant marker of humanity. I argue that Voyage ultimately reveals—through a captivating satirical fiction—how understanding Cartesian anatomy as the product of anxiety, uncertainty, and novelty helps us better see how we became motivated to transcend our bodies.
Demography of a Collapsing Aerial Insectivore Population
Date: 2017-05-01
Creator: Liam Taylor
Access: Open access
- Aerial insectivores have been declining across northeastern North America since the end of the 20th century. The mechanisms and demographic patterns of this decline are unclear. On Kent Island, New Brunswick, Canada, an isolated population of Tree Swallows (Tachycineta bicolor) collapsed between 1987 and 2010. To explore how demographic rates (i.e., survival, reproduction, and immigration) drove the population dynamics of these northeastern aerial insectivores, we combined productivity, population survey, and capture-recapture data in an integrated population model analysis. Neither consistently low juvenile survival rates, adult survival rates, nor clutch size were correlated with population growth rate across years. Alternatively, male and female immigration, hatching success, and fledging success rates were correlated with population growth rate. Because local hatching and fledging success rates cannot influence a population without local recruitment, we argue that the demography of these Tree Swallows is mainly structured by immigration. Parameter-substitution simulations revealed that overall decline was likely even if the population had avoided the worst years of demographic collapse. Breeding Bird Survey comparisons demonstrated how the Kent Island population represents both a demographic and geographical extreme at the edge of a declining region. These demographic patterns highlight the sensitivity, even to the point of local extinction, of some isolated populations to region-scale patterns in the production of potential immigrants.