Soil N dynamics in a natural calcareous grassland under a changing climate

Jamieson, N. D.; Barraclough, D.; Unkovich, M.; Monaghan, Rachel

doi:10.1007/s003740050432

Cited by 50 publications

(29 citation statements)

References 18 publications

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“…The results presented were obtained using relatively simple and inexpensive means and are similar to those obtained by other researchers who used a more complex electric heating cable system for warming the soil (e.g. Jamieson et al . 1998; Verburg et al .…”

Section: Discussionsupporting

confidence: 86%

Temperature‐ and moisture‐induced changes in the structure of the nematode fauna of a semiarid grassland –‐ patterns and mechanisms

Bakonyi

Nagy

2000

Global Change Biology

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Summary A field experiment was established to examine the effects of temperature and moisture modifications on the nematode fauna of a semiarid grassland. Several combinations of drying, wetting, warming and cooling were applied to plots and compared with untreated control plots. The experiment was performed from July to October 1996. A significant shift was observed in the structure of the nematode fauna between late summer and early autumn. This shift was manifested in the disappearance of four rare genera; Ecumenicus, Eucephalobus, Paraphelenchus and Pungentus. A significant decrease was found in the density of Acrobeles, Aphelenchoides, Ditylenchus and Prismatolaimus; in addition there was a significant increase in the density of Cephalobus, Helicotylenchus, Paratylenchus and Tylenchorhynchus. Community structural change was represented by an initial decrease in nematode generic richness of 30–50%, and in a statistically significant decrease of nematode diversity in the control and all treated plots. Thereafter, emergence of a new community was demonstrated. Data show that temperature manipulation was the main factor to influence nematode diversity, Maturity Index, and Plant Parasite Index. However, nematode population density was influenced predominantly by the soil moisture content. Coenological analysis of soil nematode fauna appears to be a useful tool for the biological monitoring of the effects of global change on semiarid grasslands.

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Section: Discussionsupporting

confidence: 86%

Temperature‐ and moisture‐induced changes in the structure of the nematode fauna of a semiarid grassland –‐ patterns and mechanisms

Bakonyi

Nagy

2000

Global Change Biology

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“…Lowest rates were found under T 2 (M N rec ) and T 3 (M N rec and M AA ). A similar effect to warming was found by Jamieson et al (1998), who reported decreased gross N mineralization rates in spring following winter warming of soil. Adaptation of the microbial community, altering the sensitivity to temperature shifts, could possibly provide an explanation why no differences in net and gross mineralization and even decreases in individual mineralization rates were found.…”

Section: Discussionsupporting

confidence: 59%

Long-term elevation of temperature affects organic N turnover and associated N<sub>2</sub>O emissions in a permanent grassland soil

Jansen-Willems

Lanigan

Clough

et al. 2016

SOIL

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Abstract. Over the last century an increase in mean soil surface temperature has been observed, and it is predicted to increase further in the future. In order to evaluate the legacy effects of increased temperature on both nitrogen (N) transformation rates in the soil and nitrous oxide (N 2 O) emissions, an incubation experiment and modelling approaches were combined. Based on previous observations that gross N transformations in soils are affected by long-term elevated-temperature treatments we hypothesized that any associated effects on gaseous N emissions (e.g. N 2 O) can be confirmed by a change in the relative emission rates from various pathways. Soils were taken from a long-term in situ warming experiment on temperate permanent grassland. In this experiment the soil temperature was elevated by 0 (control), 1, 2 or 3 • C (four replicates per treatment) using IR (infrared) lamps over a period of 6 years. The soil was subsequently incubated under common conditions (20 • C and 50 % humidity) and labelled as NO ) and NO − 3 contents were higher in soil subjected to the +2 and +3 • C temperature elevations (preand post-incubation). Analyses of N transformations using a 15 N tracing model showed that, following incubation, gross organic (but not inorganic) N transformation rates decreased in response to the prior soil warming treatment. This was also reflected in reduced N 2 O emissions associated with organic N oxidation and denitrification. Furthermore, a newly developed source-partitioning model showed the importance of oxidation of organic N as a source of N 2 O. In conclusion, long-term soil warming can cause a legacy effect which diminishes organic N turnover and the release of N 2 O from organic N and denitrification.

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“…Perhaps more importantly though, it addressed interactions between different components of climate change, in contrast to earlier work, which tended to address one at a time in isolation from the others (e.g. Jamieson et al, 1998;Post, 1990).…”

Section: Terrestrial Mesocosms and Ecotronsmentioning

confidence: 87%

Mesocosm Experiments as a Tool for Ecological Climate-Change Research

Stewart

Dossena

Bohan

et al. 2013

Advances in Ecological Research

278

230

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Soil N dynamics in a natural calcareous grassland under a changing climate

Cited by 50 publications

References 18 publications

Temperature‐ and moisture‐induced changes in the structure of the nematode fauna of a semiarid grassland –‐ patterns and mechanisms

Temperature‐ and moisture‐induced changes in the structure of the nematode fauna of a semiarid grassland –‐ patterns and mechanisms

Long-term elevation of temperature affects organic N turnover and associated N<sub>2</sub>O emissions in a permanent grassland soil

Mesocosm Experiments as a Tool for Ecological Climate-Change Research

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Soil N dynamics in a natural calcareous grassland under a changing climate

Cited by 50 publications

References 18 publications

Temperature‐ and moisture‐induced changes in the structure of the nematode fauna of a semiarid grassland –‐ patterns and mechanisms

Temperature‐ and moisture‐induced changes in the structure of the nematode fauna of a semiarid grassland –‐ patterns and mechanisms

Long-term elevation of temperature affects organic N turnover and associated N&lt;sub&gt;2&lt;/sub&gt;O emissions in a permanent grassland soil

Mesocosm Experiments as a Tool for Ecological Climate-Change Research

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Long-term elevation of temperature affects organic N turnover and associated N<sub>2</sub>O emissions in a permanent grassland soil