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Articles 661 - 690 of 979
Full-Text Articles in Entire DC Network
Literature Cited, Studies In Avian Biology
Literature Cited, Studies In Avian Biology
Studies in Avian Biology
No abstract provided.
Integration Of Research With Long-Term Monitoring: Breeding Wood Ducks On The Savannah River Site, Robert A. Kennamer, Gary R. Hepp
Integration Of Research With Long-Term Monitoring: Breeding Wood Ducks On The Savannah River Site, Robert A. Kennamer, Gary R. Hepp
Studies in Avian Biology
No abstract provided.
Journal Of Cave And Karst Studies, Volume 61, No. 3, December 1999, Table Of Contents, National Speleological Society
Journal Of Cave And Karst Studies, Volume 61, No. 3, December 1999, Table Of Contents, National Speleological Society
KIP Articles
No abstract provided.
Uis Commission On Volcanic Caves Newsletter, No. 24, November 1999, Jan Paul G. Van Der Pas
Uis Commission On Volcanic Caves Newsletter, No. 24, November 1999, Jan Paul G. Van Der Pas
Union Internationale de Spéléologie (UIS) Commission on Volcanic Caves
Contents: Editorial -- About the IXth International Symposium on Vulcanospeleology -- Agenda -- Mission Statement -- Subject: Report on the 9th International Symposium on Vulcanospeleology -- UIS Code of Ethics for Cave Exploration and Science in Foreign Countries -- Email with list of lava tubes by depth (Meters) -- Motions proposed during the UIS Commission Meeting at Catania -- Attending the VIIth International Symposium for Pseudokarst -- Publication received -- Front Cover of International Journal of Speleology; Proceedings of 8th International Symposium on Vulcanospeleology
Distribution And Habitat Associations Of Three Endemic Grassland Songbirds In Southern Saskatchewan, S. K. Davis, D. C. Duncan, M. Skeel
Distribution And Habitat Associations Of Three Endemic Grassland Songbirds In Southern Saskatchewan, S. K. Davis, D. C. Duncan, M. Skeel
Wilson Bulletin
No abstract provided.
Nectar Preference And Predator Avoidance Of Hummingbirds, September 1999, Michael Steinbeiss
Nectar Preference And Predator Avoidance Of Hummingbirds, September 1999, Michael Steinbeiss
Monteverde Institute: Tropical Ecology and Conservation
I studied feeding preferences of hummingbirds in the presence and absence of a simulated predator at feeders with varied nectar concentration. Using nectar concentration of 15% and 25% with and without predators, I counted visits over eleven sessions of one hour apiece. I found no significant patterns in number of visits (p= .379) or number of species visiting (p= 0.413) across all treatments. The hummingbirds showed no avoidance of the predator nor preference for nectar concentration. Although no statistically significant patterns were found, these findings are biologically relevant because they indicate possible behavioral responses to fragmentation and environmental disturbances.
Journal Of Cave And Karst Studies, Volume 61, No. 2, August 1999, Table Of Contents, National Speleological Society
Journal Of Cave And Karst Studies, Volume 61, No. 2, August 1999, Table Of Contents, National Speleological Society
KIP Articles
No abstract provided.
Juvenile Marbled Murrelet Nurseries And The Productivity Index, Katherine J. Kuletz, John F. Piatt
Juvenile Marbled Murrelet Nurseries And The Productivity Index, Katherine J. Kuletz, John F. Piatt
Wilson Bulletin
No abstract provided.
Spatial Extent Of Human-Intrusion Effects On Subalpine Bird Distributions, Kevin Gutzwiller, Stanley H. Anderson
Spatial Extent Of Human-Intrusion Effects On Subalpine Bird Distributions, Kevin Gutzwiller, Stanley H. Anderson
Condor
No abstract provided.
Crow's Nest, April 6, 1999, Crow's Nest Staff
Crow's Nest, April 6, 1999, Crow's Nest Staff
Crow's Nest
The April 6, 1999, issue of the Crow's Nest.
Journal Of Cave And Karst Studies, Volume 61, No. 1, April 1999, Table Of Contents, National Speleological Society
Journal Of Cave And Karst Studies, Volume 61, No. 1, April 1999, Table Of Contents, National Speleological Society
KIP Articles
No abstract provided.
Cueva De Villa Luz, Tabasco, Mexico: Reconnaissance Study Of An Active Sulfur Spring Cave And Ecosystem, Louise D. Hose, James A. Pisarowicz
Cueva De Villa Luz, Tabasco, Mexico: Reconnaissance Study Of An Active Sulfur Spring Cave And Ecosystem, Louise D. Hose, James A. Pisarowicz
KIP Articles
Cueva de Villa Luz (a.k.a. Cueva de las Sardinas) in Tabasco, Mexico, is a stream cave with over a dozen H2S-rich springs rising from the floor. Oxidation of the H2S in the stream results in abundant, suspended elemental sulfur in the stream, which is white and nearly opaque. Hydrogen sulfide concentrations in the cave atmosphere fluctuate rapidly and often exceed U.S. government tolerance levels. Pulses of elevated carbon monoxide and depleted oxygen levels also occasionally enter the cave. Active speleogenesis occurs in this cave, which is forming in a small block of Lower Cretaceous limestone adjacent to a fault. Atmospheric …
Crow's Nest, March 23, 1999, Crow's Nest Staff
Crow's Nest, March 23, 1999, Crow's Nest Staff
Crow's Nest
The March 23, 1999, issue of the Crow's Nest.
Market And Policy Incentives For Livestock Production And Watershed Protection In Arenal, Costa Rica, March 1999, Bruce Aylward, Jaime Echeverria, Katherine Allen, Ronald Mejías, Ina T. Porras
Market And Policy Incentives For Livestock Production And Watershed Protection In Arenal, Costa Rica, March 1999, Bruce Aylward, Jaime Echeverria, Katherine Allen, Ronald Mejías, Ina T. Porras
Monteverde Institute: Economy and Resource Management
Conventional wisdom amongst environmentalists holds that the cutting of tropical forest for livestock production is not only bad business but also bad for the environment. In particular, it is thought that conversion to pasture leads to rising sedimentation of waterways and reservoirs, an increase in flooding and loss of dry season water supply. In the case of Lake Arenal, Costa Rica this conventional wisdom is stood on its head in an evaluation of the market and policy incentives guiding land use in the Río Chiquito watershed of the Arenal region of Costa Rica. The study suggests that ranching, dairy and …
University Of South Florida Fact Book, 1999, University Of South Florida. Office Of Budget And Policy Analysis. Institutional Effectiveness
University Of South Florida Fact Book, 1999, University Of South Florida. Office Of Budget And Policy Analysis. Institutional Effectiveness
USF Fact Book
A statistical fact book for the University of South Florida for 1999-2000. The book is split into ten sections: Introduction: History and Historical Trends; Current University Characteristics; Student Profile; Enrollment; Courses and Degrees; Faculty and Staff; Awards and Honors; Fiscal Resources; Physical Resources; and Glossary. A table of contents lists all the tables within each section.
Intro Matter, Journal Of Ecological Anthropology (Jea)
Intro Matter, Journal Of Ecological Anthropology (Jea)
Journal of Ecological Anthropology
No abstract provided.
Environmental Vulnerability And Agriculture In The Karstic Domain: Landscape Indicators And Cases In The Atlas Highlands, Morocco, Brahim Akdim, Mohammed Amyay
Environmental Vulnerability And Agriculture In The Karstic Domain: Landscape Indicators And Cases In The Atlas Highlands, Morocco, Brahim Akdim, Mohammed Amyay
International Journal of Speleology
After the brief presentation of the major karstic areas in Morocco, the article focused essentially on the Atlas mountains to investigate the impact of the agriculture on the natural systems equilibrium. Socio-economic changes (demographic pressure, escalation of the landscape use, utilisation of new techniques in water harvesting, etc...) have sometimes fathered mechanisms of degradation. Many indicators seem to reflect these mechanisms. The pedologic indicators, soil erosion, the hydrologic and geomorphic indicators, are apprehended to demonstrate existent correlation between different variables and the often negative impacts of land over-use in the karstic domain of the Middle Atlas.
Relationship Of Fire History To Territory Size, Breeding Density, And Habitat Of Baird's Sparrow In North Dakota, Maiken Winter
Relationship Of Fire History To Territory Size, Breeding Density, And Habitat Of Baird's Sparrow In North Dakota, Maiken Winter
Studies in Avian Biology
No abstract provided.
Le Conte's Sparrows Breeding In Conservation Reserve Program Fields Precipitation And Patterns Of Population Change, Lawrence D. Igl, Douglas H. Johnson
Le Conte's Sparrows Breeding In Conservation Reserve Program Fields Precipitation And Patterns Of Population Change, Lawrence D. Igl, Douglas H. Johnson
Studies in Avian Biology
No abstract provided.
Full Issue, Studies In Avian Biology
List Of Authors, Studies In Avian Biology
List Of Authors, Studies In Avian Biology
Studies in Avian Biology
No abstract provided.
Theory And Research In Social Education, Volume 27, No. 1, Winter 1999, E. Wayne Ross
Theory And Research In Social Education, Volume 27, No. 1, Winter 1999, E. Wayne Ross
Theory and Research in Social Education
No abstract provided.
Spans Of Time: The Contributions Of George S. Gandy, Ben T. Davis, And Courtney Campbell To The Development Of The Tampa Bay Area, David W. Adams
Spans Of Time: The Contributions Of George S. Gandy, Ben T. Davis, And Courtney Campbell To The Development Of The Tampa Bay Area, David W. Adams
Tampa Bay History
No abstract provided.
Journal Of Cave And Karst Studies, Volume 60, No. 3, December 1998, Table Of Contents, National Speleological Society
Journal Of Cave And Karst Studies, Volume 60, No. 3, December 1998, Table Of Contents, National Speleological Society
KIP Articles
No abstract provided.
Unofficial Grapevine, December 1998, University Of South Florida St. Petersburg.
Unofficial Grapevine, December 1998, University Of South Florida St. Petersburg.
Unofficial Grapevine
The December 1998 issue of the Unofficial Grapevine.
Vertical Distributions Of Breeding-Season Birds: Is Human Intrusion Influential?, Kevin J. Gutzwiller, Krista L. Clements, Heidi A. Marcum, Charles A. Wilkins, Stanley H. Anderson
Vertical Distributions Of Breeding-Season Birds: Is Human Intrusion Influential?, Kevin J. Gutzwiller, Krista L. Clements, Heidi A. Marcum, Charles A. Wilkins, Stanley H. Anderson
Wilson Bulletin
No abstract provided.
Institutional Arrangements For Watershed Management: A Case Study Of Arenal, Costa Rica, December 1998, Bruce Aylward, Alvaro Fernández González
Institutional Arrangements For Watershed Management: A Case Study Of Arenal, Costa Rica, December 1998, Bruce Aylward, Alvaro Fernández González
Monteverde Institute: Economy and Resource Management
The CREED Costa Rica project conducted an exhaustive quantitative inquiry into the economic factors that determine land use in the Río Chiquito watershed of Lake Arenal, Costa Rica, and found that livestock production is likely to produce positive hydrological externalities. This paper integrates these results into an application of the Institutional Analysis and Development Framework that is informed by a participatory process conducted with watershed stakeholders. The paper identifies physical measures, institutional arrangements and incentive mechanisms to stimulate improved watershed management in Río Chiquito by expanding the analysis beyond just the internalisation of hydrological externalities, to consideration of the larger …
An Analysis Of Private And Social Discount Rates In Costa Rica, December 1998, Bruce Aylward, Ina T. Porras
An Analysis Of Private And Social Discount Rates In Costa Rica, December 1998, Bruce Aylward, Ina T. Porras
Monteverde Institute: Economy and Resource Management
In the economic analysis of long-term projects or changes in policy and land use with long term impacts, the cost and benefit flows typically occur in different periods. The process of discounting these flows enables them to be added together and compared with the net present value of alternative courses of action. Discounting is therefore central to intertemporal economic analysis. In the case of the analysis of environmental issues, discounting assumes particular importance, given that economic benefits produced by ecosystems (or damages incurred by their degradation) either (1) occur only in the future (2) increase into the future or (3) …
Tri-County Challenger, November 14, 1998, The Weekly Challenger, Et Al
Tri-County Challenger, November 14, 1998, The Weekly Challenger, Et Al
Weekly Challenger Newspaper Collection
The November 14, 1998, issue of Tri-County Challenger.