Roots exert a strong influence on the temperature sensitivityof soil respiration

Boone, Richard D.; Nadelhoffer, Knute J.; Canary, Jana; Kaye, Jason P.

doi:10.1038/25119

Cited by 855 publications

(577 citation statements)

References 28 publications

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“…Increased sensitivity of soil respiration in the presence of roots has previously been shown for temperate forests (Boone et al, 1998) and it appears that a similar relationship may exist in tropical forests even though they have a much smaller range in soil temperatures.…”

Section: Treatment Effects On the Relationships Between Soil Respiratmentioning

confidence: 82%

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A new approach to trenching experiments for measuring root–rhizosphere respiration in a lowland tropical forest

Sayer

2010

Soil Biology and Biochemistry

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Section: Treatment Effects On the Relationships Between Soil Respiratmentioning

confidence: 82%

“…There is evidence that heterotrophic respiration and root respiration may respond differently to increased temperature (e.g. Boone et al, 1998;Epron et al, 2001), drought (e.g. Borken et al, 2006) and elevated atmospheric CO 2 (e.g.…”

Section: Introductionmentioning

confidence: 99%

A new approach to trenching experiments for measuring root–rhizosphere respiration in a lowland tropical forest

Sayer

2010

Soil Biology and Biochemistry

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“…The calculated P CO2 ranged from 0.29%-6.58%, with generally higher values in GW and HZ than in SoilW and RW. P CO2 in GW samples especially increased during the warmer months of the year, when soil respiration is known to increase (Boone et al, 1998). Generally, the PHREEQC calculation indicates that precipitation of carbonate is likely to take place, though dissolution processes may also occur, especially in the soil system during the summer months.…”

Section: Speciation With Phreeqcmentioning

confidence: 99%

Field scale interaction and nutrient exchange between surface water and shallow groundwater in the Baiyang Lake region, North China Plain

Brauns

Bjerg

Song

et al. 2016

Journal of Environmental Sciences

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Fertilizer input for agricultural food production, as well as the discharge of domestic and industrial water pollutants, increases pressures on locally scarce and vulnerable water resources in the North China Plain. In order to: (a) understand pollutant exchange between surface water and groundwater, (b) quantify nutrient loadings, and (c) identify major nutrient removal pathways by using qualitative and quantitative methods, including the geochemical model PHREEQC) a one-year study at a wheat (Triticum aestivum L.) and maize (Zea mays L.) double cropping system in the Baiyang Lake area in Hebei Province, China, was undertaken. The study showed a high influence of low-quality surface water on the shallow aquifer. Major inflowing pollutants into the aquifer were ammonium and nitrate via inflow from the adjacent Fu River (up to 29.8 mg/L NH 4 -N and 6.8 mg/L NO 3 -N), as well as nitrate via vertical transport from the field surface (up to 134.8 mg/L NO 3 -N in soil water). Results from a conceptual model show an excess nitrogen input of about 320 kg/ha/a. Nevertheless, both nitrogen species were only detected at low concentrations in shallow groundwater, averaging at 3.6 mg/L NH 4 -N and 1.8 mg/L NO 3 -N. Measurement results supported by PHREEQC-modeling indicated cation exchange, denitrification, and anaerobic ammonium oxidation coupled with partial denitrification as major nitrogen removal pathways. Despite the current removal capacity, the excessive nitrogen fertilization may pose a future threat to groundwater quality. Surface water quality improvements are therefore recommended in conjunction with simultaneous monitoring of nitrate in the aquifer, and reduced agricultural N-inputs should be considered.

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“…The daily variation of soil temperature would be reduced under increased shelter, controlling the penetration depth of the daily heat wave into the soil. The removal of the litter layer may change the soil temperature regime, hence affecting the rates of temperature-dependent biological processes such as organic matter mineralization (Bonito et al, 2003;Liu et al, 2010) and root development (Boone et al, 1998). However, no information about litter layer removal on the soil thermal regime is available so far for Mediterranean conditions.…”

Section: Introductionmentioning

confidence: 99%

“…In fact, mean daily temperatures at any depth of the mineral soil on day W were significantly (*p < 0.05) greater (1 to 1.5 ºC) in P1 than in P2, while no differences between profiles were found on days D and M (Table 2). Warmer and moist soil conditions under the litter layer during winter, the cold and rainy season in Mediterranean climates, are expected to promote soil biological activity and the rates of organic matter mineralization and root development (Boone et al, 1998;Bonito et al, 2003;Liu et al, 2010), when compared to those in cooler and moist soils without litter cover.…”

Section: Mean Daily Temperaturesmentioning

confidence: 99%

Influence of litter layer removal on the soil thermal regime of a pine forest in a mediterranean climate

Andrade

Abreu

Madeira

2010

Rev. Bras. Ciênc. Solo

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SUMMARYThe removal of the litter layer in Portuguese pine forests would reduce fire hazard, but on the other hand this practice would influence the thermal regime of the soil, hence affecting soil biological activity, litter decomposition and nutrient dynamics. Temperature profiles of a sandy soil (Haplic Podzol) under a pine forest were measured with thermocouples at depths to 16 cm, with and without litter layer. The litter layer acted as a thermal insulator, reducing the amplitude of the periodic temperature variation in the mineral soil underneath and increasing damping depths, particularly at low soil water contents. At the mineral soil surface the reduction of amplitudes was about 2.5 ºC in the annual cycle and 5 to 6.7 ºC in the daily cycle, depending on the soil water content. When soil was both cold and wet, mean daily soil temperatures were higher (about 1 -1.5 ºC) under the litter layer. Improved soil thermal conditions under the litter layer recommend its retention as a forest management practice to follow in general.Index terms: soil temperature, Fourier series, damping depth.(1) Received for publication in May 2010 and approved in July 2010.

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Roots exert a strong influence on the temperature sensitivityof soil respiration

Cited by 855 publications

References 28 publications

A new approach to trenching experiments for measuring root–rhizosphere respiration in a lowland tropical forest

A new approach to trenching experiments for measuring root–rhizosphere respiration in a lowland tropical forest

Field scale interaction and nutrient exchange between surface water and shallow groundwater in the Baiyang Lake region, North China Plain

Influence of litter layer removal on the soil thermal regime of a pine forest in a mediterranean climate

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