1989
DOI: 10.1007/bf00000895
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Organic matter turnover in a sagebrush steppe landscape

Abstract: Abstract. Laboratory incubations of 15N-amended soils from a sagebrush steppe in southcentral Wyoming indicate that nutrient turnover and availability have complex patterns across the landscape and between microsites. Total and available N and P and microbial C and N were highest in topographic depressions characterized by tall shrub communities. Net and gross N mineralization rates and respiration were also highest in these areas, but microbial efficiencies expressing growth relative to respiration cost were … Show more

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Cited by 103 publications
(82 citation statements)
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References 34 publications
(40 reference statements)
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“…There is also a strong variability of soils in semi-arid ecosystems associated with the location of individual plants (Charley and West 1975, Burke et al 1989a, Burke et al 1989b, Hook et al 1991, Schlesinger et al 1996, Sankey et al 2012a). This fine-scale heterogeneity in soil organic matter, which is concentrated under individual shrubs relative to interspaces, is a well-recognized feature of sagebrush ecosystems, with indications that it is responsive to changes in ecosystem management (Burke et al 1987, Sankey et al 2012b.…”
Section: Introductionmentioning
confidence: 99%
“…There is also a strong variability of soils in semi-arid ecosystems associated with the location of individual plants (Charley and West 1975, Burke et al 1989a, Burke et al 1989b, Hook et al 1991, Schlesinger et al 1996, Sankey et al 2012a). This fine-scale heterogeneity in soil organic matter, which is concentrated under individual shrubs relative to interspaces, is a well-recognized feature of sagebrush ecosystems, with indications that it is responsive to changes in ecosystem management (Burke et al 1987, Sankey et al 2012b.…”
Section: Introductionmentioning
confidence: 99%
“…Calcium also remained homogenous between the microv www.esajournals.org sites in the PLWC and Atherley sites in the Acana soils and, conversely, became patchy within the Druehl site. Even though this suggests that the resource island have not re-established in these sites, Ca does not consistently develop a resource island effect across Artemisia shrublands (Charley and West 1975, Doescher et al 1984, Burke et al 1989, Chambers 2001. Since these were the only differences in soil fertility patterning detected, we suggest that the resource island patterns have Fig.…”
Section: Discussionmentioning
confidence: 79%
“…Sampling began at least 50 m within the boundary of an old field or away from roads to avoid edge effects. Since microsite differences in C, N, P, and K are often highest in surface soils (0-5cm) (Burke et al 1989, Bolton et al 1993, McGonigle et al 2005 Inouye 2007), we collected soils from 0-5 cm depth midway between the shrub stem and canopy edge under randomly selected shrubs (4 per linear route; n ¼ 12) and in the interspaces midway between shrubs (4 per linear route; n ¼ 12). Bulk density was obtained at random locations in the interspaces (n ¼ 6) using an adapted excavation method (Johansen 2011).…”
Section: Field Samplingmentioning
confidence: 99%
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“…Sin embargo, el efecto de cada especie vegetal en la dinámica de nutrientes depende de las características del suelo y del nutriente que se trate (Binkley et al, 1992;Koch y Matzner, 1993; García-Montiel y Binkley, 1998;Døckersmith et al, 1999). La influencia de diferentes tipos de plantas sobre tales procesos edáficos ha sido examinada en ecosistemas áridos (García-Moya y McKell, 1970;West, 1981;Burke et al, 1989), en sabanas tropicales (Kellman, 1979;Belsky, 1994;García-Miragaya et al, 1994) y en selvas bajas caducifolias (Døckersmith et al, 1999), en los que se ha demostrado la fuerte influencia de las especies vegetales en la dinámica de los nutrientes del suelo. Entre los mecanismos más importantes que utilizan las plantas en la economía de los nutrientes está la re-utilización de una fracción de los existentes en sus hojas vivas para generar más biomasa.…”
Section: Resumen Introducciónunclassified