Effects of juniper cutting on nitrogen mineralization

Bates, Jon D.; Svejcar, Tony J.; Miller, Richard F.

doi:10.1006/jare.2001.0948

Cited by 49 publications

(40 citation statements)

References 30 publications

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“…Both total organic N and bioavailable inorganic N (measured as resin sorbed NH 4 + -N) were signiWcantly greater under the juniper canopy compared to the heath. This contrasts with previous Wndings that demonstrated no elevated concentrations of inorganic N under undisturbed juniper canopies in arid scrublands (Bates et al 2002) and even reduced rates of N mineralization under shrub (Cornus drummondii) canopies in mesic grasslands (McCarron et al 2003). The diVerence between these shrub islands and the juniper islands in this study is the concentrated presence of the P. schreberi-cyanobacterial N Wxing association under the juniper canopy in the arctic tundra and no clear presence of N Wxing organisms in the North American studies.…”

Section: Discussioncontrasting

confidence: 82%

“…Our work demonstrates a signiWcant increase in total N concentration under the juniper canopy, but no trend for organic C. Similarly, North American studies demonstrate that organic N was dramatically elevated under western juniper canopies (Bates et al 2002;Klemmedson and Tiedemann 2000). Although there appears to be an upward trend for organic C in our system, the diVerences are not signiWcant.…”

Section: Discussionmentioning

confidence: 74%

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Enhanced soil fertility under Juniperus communis in arctic ecosystems

DeLuca

Zackrisson

2007

Plant Soil

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Patches of common juniper (Juniperus communis L.) shrubs potentially facilitate the formation of fertile islands in heath tundra ecosystems thereby inXuencing the long-term resilience of these ecosystems. Although the role of juniper in the formation of such 'islands of fertility' has been studied in semiarid landscapes, there has been little attention paid to the importance of juniper in other ecosystems. In this study we contrast the soil fertility and rates of N Wxation under juniper shrubs with that in open heath tundra in northern Sweden. Plots were established at several individual sites in alpine heath tundra in Northern Sweden and mineral soils to a depth of 10 cm were characterized for available N and P and total C, N, P, Ca, Mg, K, Fe, Mn, Zn, and Cu. Nitrogen Wxation rates were measured by acetylene reduction in feather mosses under juniper canopies and contrasted with N Wxation in both feather mosses and surface soils in the open heath. Soils under juniper had concentrations of total P greatly in excess of P in open heath, furthermore, juniper islands had the highest concentrations of bioavailable P. Nitrogen Wxation rates in the feather moss Pleurozium schreberi (Bird.) Mitt were approximately 150 mol acetylene reduced m ¡2 d ¡1 under the juniper canopy compared to less than 10 mol acetylene reduced m ¡2 d ¡1 in the open heath. Feather mosses under the juniper canopy also Wxed N at a signiWcantly higher rate (on an aerial basis) than that of surface cores from the open heath that included lichen, mosses, and soil crusts. Juniper facilitates the formation of islands of soil fertility that may in turn facilitate the growth of other plants and positively inXuence the long term recovery of heath tundra ecosystems following disturbance.

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Section: Discussioncontrasting

confidence: 82%

Section: Discussionmentioning

confidence: 74%

Enhanced soil fertility under Juniperus communis in arctic ecosystems

DeLuca

Zackrisson

2007

Plant Soil

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“…Studies have described the chronology of post-settlement establishment (after 1850) of juniper and pinon woodlands (Burkhardt and Tisdale, 1976;Tausch et al, 1981;Tausch and West, 1988;Knapp and Soulé, 1996;Miller and Rose, 1999;Miller et al, 2000Miller et al, , 2005 and the spatial variation of woodlands across the Great Basin (West et al, 1978). In addition, impacts of woodland encroachment on plant community composition and structure, hydrologic processes, nutrient cycling, and wildlife habitat have also been evaluated (Klopatek, 1987;Reinkensmeyer, 2000;Bates et al, 2002;Miller et al, 2000Miller et al, , 2005. Other studies have looked at the relationships linking soils and plant associations with woodland structure and the interaction between increasing juniper dominance and understory species (Koniak and Everett, 1982;Tausch and West, 1995;West, 1999;Miller et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

Structure and development of expanding western juniper woodlands as influenced by two topographic variables

Johnson

Miller

2006

Forest Ecology and Management

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“…The increase in pH beneath juniper may be partially attributed to the increase in lime. Bates et al (2002) also reported increases in soil pH beneath western juniper canopies compared to tree interspaces. Nutrient composition for aspen and juniper litter was also significantly different (Table 3).…”

Section: Effects Of Western Juniper On Soilmentioning

confidence: 97%

Journal of Range Management, Volume 54, Number 6 (November 2001)

2001

REM

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Published bimonthly-January, March, May, July, September, November The Society For Range Management, founded in 1948 as the American Society of Range Management, is a nonprofit association incorporated under the laws of the State of Wyoming. It is recognized exempt from Federal income tax, as a scientific and educational organization, under the provisions of Section 501(c)(3) of the Internal Revenue Code, and also is classed as a public foundation as described in Section 509(a)(2) of the Code. The name of the Society was changed in 1971 by amendment of the Articles of Incorporation.The objectives for which the corporation is established are:- The Journal of Range Management is a publication of the Society for RangeManagement. It serves as a forum for the presentation and discussion of facts, ideas, and philosophies pertaining to the study, management, and use of rangelands and their several resources. Accordingly, all material published herein is signed and reflects the individual views of the authors and is not necessarily an official position of the Society. Manuscripts from anyone-nonmembers as well as members-are welcome and will be given every consideration by the editors. Editorial comments by an individual are also welcome and, subject to acceptance by the editor, will be published as a "Viewpoint."In Cooperation With: Some of the articles appearing in The assumption that ranchers are profit maximizers and that good managers can adopt technology are common among technology developers (White 1987, Workman 1986. However, the adoption of new technology by land managers is affected by many factors other than productivity including perceived risk and uncertainty (Zepada 1994). Fliegel (1993 proposed a technology adoption model for land managers in which the interaction of community characteristics (age, education, income, size of farm and tenure status) social participation in farm and/or community organizations, and communication factors (extension contact, print media contact, and radio contact) affect the rate of technology adoption. Yet, Barao (1992) Station, Tex. 77843; professor, Texas Agr. Exp. Sta., US Hwy. 87 North, San Angelo, Tex. 76901; and professor, Texas Agr. Ext. Service, US Hwy. 87 North, San Angelo, Tex. 76901 Research was funded through a gift from Dow AgroSciences LLC and a Texas A&M University Faculty Mini-Grant.Manuscript accepted 3 Feb. 2001. ResumenEl cambio demográfico de la propiedad de la tierra y el mayor reconocimiento de que alguna cantidad de plantas leñosas es valiosa para ciertos objetivos de manejo de pastizales ha conducido a aumentar el interés de practicas selectivas de manejo de arbustos. Los Quebradores de Arbustos es un programa colaborativo de extensión/investigación desarrollado en respuesta de este creciente interés. En 1999 se condujo un muestreo entre los agentes agrícolas municipales de extensión de Texas para determinar sus percepciones acerca del interés en y la adopción de prácticas de quebrado de arbustos. Utilizando 3 fotografías de umbral, los Agente...

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Effects of juniper cutting on nitrogen mineralization

Cited by 49 publications

References 30 publications

Enhanced soil fertility under Juniperus communis in arctic ecosystems

Enhanced soil fertility under Juniperus communis in arctic ecosystems

Structure and development of expanding western juniper woodlands as influenced by two topographic variables

Journal of Range Management, Volume 54, Number 6 (November 2001)

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