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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Tb196: Temperature, Soil Moisture, And Streamflow At The Bear Brook Watershed In Maine (Bbwm), Ivan J. Fernandez, Joseph E. Karem, Stephen A. Norton, Lindsey E. Rustad
Tb196: Temperature, Soil Moisture, And Streamflow At The Bear Brook Watershed In Maine (Bbwm), Ivan J. Fernandez, Joseph E. Karem, Stephen A. Norton, Lindsey E. Rustad
Technical Bulletins
The Bear Brook Watershed in Maine is a whole-ecosystem chemical manipulation initiated in 1987 to study the effects of acid deposition on forests and surface waters. The focus of this research was to understand the biogeochemical response of watersheds with emphasis on chemistry and hydrology. In 2001 a program was initiated to provide more detailed measurements of temperature and moisture to examine critical linkages amongst chemical, biological, and physical processes that ultimately work together to define ecosystem function. The purpose of this publication is to provide data from the initial phase of soil temperature, air temperature, and soil moisture measurements …
Spatial And Temporal Patterns Of Nitrogen Deposition In China: Synthesis Of Observational Data, Chaoqun (Crystal) Lu, Hanqin Tian
Spatial And Temporal Patterns Of Nitrogen Deposition In China: Synthesis Of Observational Data, Chaoqun (Crystal) Lu, Hanqin Tian
Chaoqun (Crystal) Lu
Anthropogenic nitrous pollutant emissions in China significantly increased during the last decades, which contributed to the accelerated nitrogen (N) deposition. In order to characterize spatial pattern of nitrogen deposition, we employed the kriging technique to interpolate sampling data of precipitation chemistry and ambient air concentration from site-network observations over China. The estimation of wet deposition in China was limited to aqueous NO3− and NH4+, while ambient NO2 was the only species involved in the predicted dry deposition fluxes. To obtain wet deposition fluxes, precipitation concentration was multiplied by 20-year mean precipitation amounts with a resolution of 10 × 10 km. …
Climate. A Period Of Consequence: Environmental Literature Of 2006, Shaun O'Connell
Climate. A Period Of Consequence: Environmental Literature Of 2006, Shaun O'Connell
New England Journal of Public Policy
The author talks about the consequences of not respecting the climate and understanding global warming will cause ecocide and our own extinction.
The Role Of Case Studies In Natural Resources Law [Summary], John Copeland Nagle
The Role Of Case Studies In Natural Resources Law [Summary], John Copeland Nagle
The Future of Natural Resources Law and Policy (Summer Conference, June 6-8)
4 pages.
"John Nagle, Univ. of Notre Dame Law School" -- Agenda
Historical Evolution And Future Of Natural Resources Law And Policy: The Beginning Of An Argument And Some Modest Predictions, Sally K. Fairfax, Helen Ingram, Leigh Raymond
Historical Evolution And Future Of Natural Resources Law And Policy: The Beginning Of An Argument And Some Modest Predictions, Sally K. Fairfax, Helen Ingram, Leigh Raymond
The Future of Natural Resources Law and Policy (Summer Conference, June 6-8)
8 pages.
Includes bibliographical references
"Sally Fairfax, UC-Berkeley, Helen Ingram, UC-Irvine, and Leigh Raymond, Purdue University" -- Agenda
Changes In Nitrogen Cycling During The Past Century In A Northern Hardwood Forest, Kendra K. Mclauchlan, Joseph M. Craine, W. Wyatt Oswald, Peter R. Leavitt, Gene E. Likens
Changes In Nitrogen Cycling During The Past Century In A Northern Hardwood Forest, Kendra K. Mclauchlan, Joseph M. Craine, W. Wyatt Oswald, Peter R. Leavitt, Gene E. Likens
Dartmouth Scholarship
Nitrogen (N) availability, defined here as the supply of N to terrestrial plants and soil microorganisms relative to their N demands, limits the productivity of many temperate zone forests and in part determines ecosystem carbon (C) content. Despite multidecadal monitoring of N in streams, the long-term record of N availability in forests of the northeastern United States is largely unknown. Therefore, although these forests have been receiving anthropogenic N deposition for the past few decades, it is still uncertain whether terrestrial N availability has changed during this time and, subsequently, whether forest ecosystems have responded to increased N deposition. Here, …
The Effect Of Air Pollution On Microsporogenesis, Pollen Development And Soluble Pollen Proteins In Spartium Junceum L. (Fabaceae), Farkhondeh Rezanejad
The Effect Of Air Pollution On Microsporogenesis, Pollen Development And Soluble Pollen Proteins In Spartium Junceum L. (Fabaceae), Farkhondeh Rezanejad
Turkish Journal of Botany
Air pollution induces abnormality in anthers, reduction of pollen grains´ umbers and male sterility. Anthers of Spartium junceum L. (Spanish broom) were collected at different stages of development from control (less polluted) and polluted areas (mainly SO_2, NO_2, CO, hydrocarbons (HCs) and airborne particulate material (APM)). Structure and development of anther walls and pollen grains were studied and compared. Groups of the control pollen grains were exposed to the polluted air of Tehran for 10 and 20 days. Under pollution stress some anthers became abnormal and shrunken. The tapetum layer had a precocious growth in the microspore mother cell stage …