ABSTRACT Dedication The authors of this article dedicate this paper to the memory of Dr. Bruce Ha... more ABSTRACT Dedication The authors of this article dedicate this paper to the memory of Dr. Bruce Haines, University of Georgia, in honor of his outstanding accomplishments in the field of ecosystem ecology. A good scientist, a good mentor, and a good friend. In the fall of 2000, a ground fire burned much of the Linville Gorge Wilderness Area, North Carolina, providing an opportunity to study the effects of fire on an oak-pine forest that had not been burned in 50 years. There was no immediate overstory mortality in our study plots. Most aboveground stems of Kalmia latifolia were killed back, but most survived and subsequently re-sprouted. Fire reduced surface organic horizons by nearly 50%, and increased light penetration 15%, resulting in greater soil temperature extremes. Fire increased species richness in the herb layer and allowed establishment of pine seedlings and also the exotic invasive tree species Paulownia tomentosa. Rates of soil respiration and litter decomposition were significantly lower in burned plots one year *email address: [email protected] post-fire. Changes in the microenvironment in the lower strata following fire were caused primarily by the disappearance of the Kalmia canopy. This temporary loss of the shrub layer appeared to influence composition of the ground layer as well as the re-accumulation of surface soil carbon via reduced litter decay.
A rootbox is described which allows observation of an intact, entire root system. Roots are sandw... more A rootbox is described which allows observation of an intact, entire root system. Roots are sandwiched against a plexiglass surface by a nylon mesh that is impermeable to roots, but permeable to water and nutrients. To quantify root growth non-destructively, roots of different size classes are traced onto acetate sheets using different color pens, and root lengths determined by digital image analysis.
The presence of acid rain in the remote Amazon rainforest of southwestern Venezuela suggests the ... more The presence of acid rain in the remote Amazon rainforest of southwestern Venezuela suggests the possibility of long-range transport of industrial pollutants to that region. Heavy metal concentrations were analyzed in samples of bryophytes and epiphyllous organisms growing on leaves and on bark in this forest. Concentrations of Cd, Pb, Ni, and Cr were higher in leaves with epiphylls than in leaves without epiphylls. All heavy metal concentrations in bryophytes from the Amazon basin site were lower than in bryophytes from temperature zones. The results indicate that long-range transport of air pollutants from industrial centers to the remote Amazon basin is occurring at only extremely low rates. Heavy metal concentrations in bryophytes and epiphylls at this site may still be considered close to present day background levels.
Wildflower species exhibit differences in ascorbic acid content and redox status that affect ozon... more Wildflower species exhibit differences in ascorbic acid content and redox status that affect ozone sensitivity.
Bulletin of The Ecological Society of America, 2007
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2008
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2007
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2006
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2008
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
ABSTRACT Dedication The authors of this article dedicate this paper to the memory of Dr. Bruce Ha... more ABSTRACT Dedication The authors of this article dedicate this paper to the memory of Dr. Bruce Haines, University of Georgia, in honor of his outstanding accomplishments in the field of ecosystem ecology. A good scientist, a good mentor, and a good friend. In the fall of 2000, a ground fire burned much of the Linville Gorge Wilderness Area, North Carolina, providing an opportunity to study the effects of fire on an oak-pine forest that had not been burned in 50 years. There was no immediate overstory mortality in our study plots. Most aboveground stems of Kalmia latifolia were killed back, but most survived and subsequently re-sprouted. Fire reduced surface organic horizons by nearly 50%, and increased light penetration 15%, resulting in greater soil temperature extremes. Fire increased species richness in the herb layer and allowed establishment of pine seedlings and also the exotic invasive tree species Paulownia tomentosa. Rates of soil respiration and litter decomposition were significantly lower in burned plots one year *email address: [email protected] post-fire. Changes in the microenvironment in the lower strata following fire were caused primarily by the disappearance of the Kalmia canopy. This temporary loss of the shrub layer appeared to influence composition of the ground layer as well as the re-accumulation of surface soil carbon via reduced litter decay.
A rootbox is described which allows observation of an intact, entire root system. Roots are sandw... more A rootbox is described which allows observation of an intact, entire root system. Roots are sandwiched against a plexiglass surface by a nylon mesh that is impermeable to roots, but permeable to water and nutrients. To quantify root growth non-destructively, roots of different size classes are traced onto acetate sheets using different color pens, and root lengths determined by digital image analysis.
The presence of acid rain in the remote Amazon rainforest of southwestern Venezuela suggests the ... more The presence of acid rain in the remote Amazon rainforest of southwestern Venezuela suggests the possibility of long-range transport of industrial pollutants to that region. Heavy metal concentrations were analyzed in samples of bryophytes and epiphyllous organisms growing on leaves and on bark in this forest. Concentrations of Cd, Pb, Ni, and Cr were higher in leaves with epiphylls than in leaves without epiphylls. All heavy metal concentrations in bryophytes from the Amazon basin site were lower than in bryophytes from temperature zones. The results indicate that long-range transport of air pollutants from industrial centers to the remote Amazon basin is occurring at only extremely low rates. Heavy metal concentrations in bryophytes and epiphylls at this site may still be considered close to present day background levels.
Wildflower species exhibit differences in ascorbic acid content and redox status that affect ozon... more Wildflower species exhibit differences in ascorbic acid content and redox status that affect ozone sensitivity.
Bulletin of The Ecological Society of America, 2007
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2008
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2007
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2006
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Bulletin of The Ecological Society of America, 2008
... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Inge... more ... http://www.R-project.org Marcelino de la Cruz Rot Departamento de Biologia Vegetal ETS Ingenieros Agronomos Universidad Politecnica de Madrid 28040 Madrid Spain E-mail: [email protected] Appendices follow... Page 6. ...
Uploads
Papers by Howard Neufeld