Forest protection; guide to lectures delivered at the Biltmore Forest School,

Mode of access: Internet.

Texas forest fires in relation to weather and other factors /

Includes bibliographical references.

Roseburg sustained yield units : ten-year timber management plan /

Includes index.

Proposed program for watershed management research in the lower conifer zone of California /

"April, 1960."

Lodgepole pine commercial forests : an essay comparing the natural cycle of insect kill and subsequent wildfire with management for utilization and wildlife /

"September 1996."

The Forest worker.

Description based on: Vol. 3, no. 1 (Jan. 1927); title from cover.

Emergency salvage timber sale program provisions : hearing before the Subcommittee on Forests and Public Land Management of the Committee on Energy and Natural Resources, United States Senate, One Hundred Fourth Congress, first session, on the emergency salvage timber sale program provisions.

Shipping list no.: 96-0069-P (pt. [1]); 96-0230-P (pt. 2).

Public Lands Management Improvement Act of 1997 : hearings before the Subcommittee on Forests and Public Land Management of the Committee on Energy and Natural Resources, United States Senate, One Hundred Fifth Congress, first session, on S. 1253, to provide to the federal land management agencies the authority and capability to manage effectively the federal lands in accordance with the principles of multiple use and sustained yield, and for other purposes, October 30, 1997, December 15, 1997, February 3, 1998.

"April 23,1998, April 30, 1998, May 5, 1998, June 4, 1998, June 17, 1998"--Pt. 2.

Links between tree species, symbiotic fungal diversity and ecosystem functioning in simplified tropical ecosystems

We studied the relationships among plant and arbuscular mycorrhizal (AM) fungal diversity, and their effects on ecosystem function, in a series of replicate tropical forestry plots in the La Selva Biological Station, Costa Rica. Forestry plots were 12 yr old and were either monocultures of three tree species, or polycultures of the tree species with two additional understory species. Relationships among the AM fungal spore community, host species, plant community diversity and ecosystem phosphorus-use efficiency (PUE) and net primary productivity (NPP) were assessed. Analysis of the relative abundance of AM fungal spores found that host tree species had a significant effect on the AM fungal community, as did host plant community diversity (monocultures vs polycultures). The Shannon diversity index of the AM fungal spore community differed significantly among the three host tree species, but was not significantly different between monoculture and polyculture plots. Over all the plots, significant positive relationships were found between AM fungal diversity and ecosystem NPP, and between AM fungal community evenness and PUE. Relative abundance of two of the dominant AM fungal species also showed significant correlations with NPP and PUE. We conclude that the AM fungal community composition in tropical forests is sensitive to host species, and provide evidence supporting the hypothesis that the diversity of AM fungi in tropical forests and ecosystem NPP covaries.

The Spectral Distribution of Radiation in Two Neotropical Rainforests

The spectral quality of radiation in the understory of two neotropical rainforests, Barro Colorado Island in Panama and La Selva in Costa Rica, is profoundly affected by the density of the canopy. Understory light conditions in both forests bear similar spectral characteristics. In both the greatest changes in spectral quality occur at low flux densities, as in the transition from extreme shade to small light flecks. Change in spectral quality, as assessed by the red: far-red (R:FR) ratio, the ratio of radiant energy 400-700: 300-1100 nm, and the ratio of quantum flux density 400-700:300-1100 nm, is strongly correlated with a drop in percentage of solar radiation as measurable by a quantum radiometer. Thus, by knowing the percentage of photosynthetic photon flux density (PPFD) in relation to full sunlight, it is possible to estimate the spectral quality in the forest at a particular time and microsite.

El impacto de la presencia online en las cuentas de Twitter de las universidades vascas y navarras

Las Universidades han tenido que adaptarse a los nuevos modelos de comunicación surgidos en la época de Internet. Dentro de estos nuevos paradigmas las redes sociales han irrumpido y Twitter se ha establecido como una de las más importantes. El objetivo de esta investigación es demostrar que existe una relación entre la presencia online de una Universidad, definida por la cantidad de información disponible en Internet, y su cuenta en Twitter. Para ello se analizó la relación entre la presencia online y los perfiles oficiales de las cinco universidades del País Vasco y Navarra. Los resultados demostraron la existencia de una correlación significativa entre la presencia online de las instituciones y el número de seguidores de sus respectivas cuentas. En segundo lugar, esta investigación se planteó si Twitter puede servir para potenciar la presencia online de una Universidad. Es por eso que se formuló una segunda hipótesis que buscaba analizar si tener varias cuentas en Twitter aumentaría la presencia online de las Universidades. Los hallazgos para esta segunda hipótesis demostraron una correlación muy significativa entre tener varios perfiles en Twitter y la presencia online de las Universidades. Así queda demostrada la importancia de la presencia online para las cuentas de Twitter y la relevancia de Twitter a la hora de potenciar la presencia online de los centros.

El uso de los yacimientos arqueológicos musealizados. Contextualización y caracterización de sus visitas en el ámbito de la Costa Brava

A principios del siglo XX el yacimiento arqueológico de Empúries abrió sus puertas a las visitas. Desde aquellos momentos hasta nuestros días numerosos yacimientos de la zona están preparados para ser visitados. Estas actuaciones, en muchas ocasiones, se encuentran relacionadas con su uso como elementos de atracción turística. En este trabajo se analizan las características del uso de estos yacimientos por parte de sus visitantes y se hace un especial hincapié en el interés de situar estas visitas en el contexto más general de las estancias turísticas o las salidas excursionistas.

De enemigo vencido a tesoro cercado: Un estudio etnohistórico sobre el ambiente en la producción forestal del Alto Paraná de Misiones (Arg.). En: Avá, nº 20

Se presenta una etnohistoria ambiental de la producción forestal en el bosque atlántico altoparanaense de Misiones (Argentina), entre 1874 y 2010. Para ello se utiliza el enfoque de la historia ambiental que se propone conocer las prácticas e ideas con las que una sociedad interviene la naturaleza (Arnold, 1992). Es etnohistoria, porque se orienta a caracterizar la diversidad de grupos sociales ágrafos y subalternos. En base a diferencias tecnológicas, de recurso y de territorio en uso, el período estudiado se subdividió en tres etapas: a) 1874 a 1920: la representación hegemónica es la selva como enemigo a vencer para integrar a Misiones a la Nación. b) 1930 a 1960: la selva es fuente de materia prima a costo cero. c) 1970 a 2010: la selva es resguardada en áreas de reserva, se define a la plantación monocultivo de árboles como bosque. La hipótesis central del artículo es que este abordaje histórico y etnográfico a la vez, posibilita entender la relación naturaleza-cultura como un proceso de configuración simultánea de dominios excluyentes, donde la clase y la diversidad étnica determinan experiencias sociales particulares del ambiente.

“I know, therefore I adapt?” Complexities of individual adaptation to climate-induced forest dieback in Alaska

Individual actions to avoid, benefit from, or cope with climate change impacts partly shape adaptation; much research on adaptation has focused at the systems level, overlooking drivers of individual responses. Theoretical frameworks and empirical studies of environmental behavior identify a complex web of cognitive, affective, and evaluative factors that motivate stewardship. We explore the relationship between knowledge of, and adaptation to, widespread, climate-induced tree mortality to understand the cognitive (i.e., knowledge and learning), affective (i.e., attitudes and place attachment), and evaluative (i.e., use values) factors that influence how individuals respond to climate-change impacts. From 43 semistructured interviews with forest managers and users in a temperate forest, we identified distinct responses to local, climate-induced environmental changes that we then categorized as either behavioral or psychological adaptations. Interviewees developed a depth of knowledge about the dieback through a combination of direct, place-based experiences and indirect, mediated learning through social interactions. Knowing that the dieback was associated with climate change led to different adaptive responses among the interviewees, although knowledge alone did not explain this variation. Forest users reported psychological adaptations to process negative attitudes; these adaptations were spurred by knowledge of the causes, losses of intangible values, and impacts to a species to which they held attachment. Behavioral adaptations exclusive to a high level of knowledge included actions such as using the forests to educate others or changing transportation behaviors to reduce personal energy consumption. Managers integrated awareness of the dieback and its dynamics across spatial scales into current management objectives. Our findings suggest that adaptive management may occur from the bottom up, as individual managers implement new practices in advance of policies. As knowledge of climate-change impacts in local environments increases, resource users may benefit from programs and educational interventions that facilitate coping strategies.

Pileated Woodpecker Occupancy and the Occurrence and Recruitment of Key Habitat Attributes in a Managed Forest

Thesis (Master's)--University of Washington, 2016-08