Stable isotope natural abundances of soil, plants and soil invertebrates in an upland pasture

Neilson, Roy; Hamilton, D.; Wishart, Jane; Marriott, Carol A.; Boag, B.; Handley, Linda L.; Scrimgeour, C. M.; McNicol, James W.; Robinson, David

doi:10.1016/s0038-0717(98)00038-8

Cited by 64 publications

(65 citation statements)

References 22 publications

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“…In all these cases, the influences of the management are integrated in the stable isotope composition of the samples, which are stable over time (with some seasonal variation) if the management is stable (e.g. Neilson et al 1998;Schnyder et al 2010;Wittmer et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Isotopic composition of soil, vegetation or cattle hair no suitable indicator of nitrogen balances in permanent pasture

Wrage

Küchenmeister

Isselstein

2011

Nutr Cycl Agroecosyst

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Stable isotope signatures of cattle tail switch hair or meadow vegetation have been found to be related to nitrogen (N) surpluses of whole farms and of meadows, respectively. Permanent pastures are more patchy in terms of nutrient inputs and outputs and N balances for the whole plot do not necessarily give correct impressions of losses. We here investigated correlations between isotopic signatures and N balances calculated for different spatial and temporal scales in permanent pastures. N concentrations and d 15

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Section: Introductionmentioning

confidence: 99%

Isotopic composition of soil, vegetation or cattle hair no suitable indicator of nitrogen balances in permanent pasture

Wrage

Küchenmeister

Isselstein

2011

Nutr Cycl Agroecosyst

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“…This approach, while widely used, has the drawback that only the material that passes through the gut of an organism undamaged can be determined (Chamberlain et al 2006a, b), while there is usually a large component of unidentifiable material remaining (Davis 1981). The use of stable isotopic analyses in soil food web studies has made it easier for ecologists to assess the role of soil organisms (Neilson et al 1998;Briones et al 1999;Scheu and Falca 2000;Schmidt et al 2004;Staddon 2004). More importantly, assumptions about feeding preferences of species have been changed as a result of the use of this technique (Chamberlain et al 2006a).…”

Section: Introductionmentioning

confidence: 99%

Food choice of Antarctic soil arthropods clarified by stable isotope signatures

et al. 2007

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Antarctic soil ecosystems are amongst the most simplified on Earth and include only few soil arthropod species, generally believed to be opportunistic omnivorous feeders. Using stable isotopic analyses, we investigated the food choice of two common and widely distributed Antarctic soil arthropod species using natural abundances of 13 C and 15 N and an isotope labelling study. In the laboratory we fed the isotomid springtail Cryptopygus antarcticus six potential food sources (one algal species, two lichens and three mosses). Our results showed a clear preference for algae and lichens rather than mosses. These results were corroborated by field data comparing stable isotope signatures from the most dominant cryptogams and soil arthropods (C. antarcticus and the oribatid mite Alaskozetes antarcticus). Thus, for the first time in an Antarctic study, we present clear evidence that these soil arthropods show selectivity in their choice of food and have a preference for algae and lichens above mosses.

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“…[1][2][3][4][5] Signatures of 13 C in animal tissues generally reflect that of their primary producer food source. In terrestrial ecosystems, 13 C values range from ca. À30% in C 3 plants to ca.…”

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confidence: 99%

“…À30% in C 3 plants to ca. À8% in C 4 plants; soil organic matter 13 C values reflect that of the predominant vegetation, past or present. 6,7 15 N may vary between À10 and 10% in terrestrial plants, depending on the source of N (e.g., leguminous or not).…”

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“…11,12 This relationship has only recently been addressed in soil food webs. 5,13 As part of a multi-site study of earthworm feeding ecology, we measured the 13 C and 15 N content of soil, plants and earthworm tissues in three tropical ecosystems in Puerto Rico. Our objective in this paper is to explore relationships between isotopic signatures in earthworms and their potential food resources in natural and managed habitats.…”

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confidence: 99%

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Stable isotopic studies of earthworm feeding ecology in tropical ecosystems of Puerto Rico

Hendrix

Lachnicht

Callaham

et al. 1999

Rapid Commun. Mass Spectrom.

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Feeding strategies of earthworms and their influence on soil processes are often inferred from morphological, behavioral and physiological traits. We used (13)C and (15)N natural abundance in earthworms, soils and plants to explore patterns of resource utilization by different species of earthworms in three tropical ecosystems in Puerto Rico. In a high altitude dwarf forest, native earthworms Trigaster longissimus and Estherella sp. showed less (15)N enrichment ((15)N = 3-6 per thousand) than exotic Pontoscolex corethrurus ((15)N =7-9 per thousand) indicating different food sources or stronger isotopic discrimination by the latter. Conversely, in a lower altitude tabonuco forest, Estherella sp. and P. corethrurus overlapped completely in (15)N enrichment ((15)N = 6-9 per thousand), suggesting the potential for interspecific competition for N resources. A tabonuco forest converted to pasture contained only P. corethrurus which were less enriched in (15)N than those in the forest sites, but more highly enriched in (13)C suggesting assimilation of C from the predominant C(4) grass. These results support the utility of stable isotopes to delineate resource partitioning and potential competitive interactions among earthworm species. Copyright 1999 John Wiley & Sons, Ltd.

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Stable isotope natural abundances of soil, plants and soil invertebrates in an upland pasture

Cited by 64 publications

References 22 publications

Isotopic composition of soil, vegetation or cattle hair no suitable indicator of nitrogen balances in permanent pasture

Isotopic composition of soil, vegetation or cattle hair no suitable indicator of nitrogen balances in permanent pasture

Food choice of Antarctic soil arthropods clarified by stable isotope signatures

Stable isotopic studies of earthworm feeding ecology in tropical ecosystems of Puerto Rico

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