WorldCat Identities

小山, 明宏 1953-

Overview
Works: 17 works in 33 publications in 3 languages and 45 library holdings
Genres: Academic theses 
Roles: Author
Publication Timeline
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Most widely held works by 明宏 小山
Keiei zaimuron by Akihiro Koyama( Book )

13 editions published between 1992 and 2016 in Japanese and held by 17 WorldCat member libraries worldwide

Keieigaku sainyūmon : Saicharenji kiso kara saishin no riron made( Book )

2 editions published in 2002 in Japanese and held by 4 WorldCat member libraries worldwide

Gendai keieigaku sainyūmon : Keieigaku o manabinaosu tameno kiso saishin riron( Book )

2 editions published in 2010 in Japanese and held by 3 WorldCat member libraries worldwide

Zaimu to ishi kettei( Book )

1 edition published in 2001 in Japanese and held by 3 WorldCat member libraries worldwide

Zaimu to ishi kettei by Akihiro Koyama( Book )

1 edition published in 2001 in Japanese and held by 2 WorldCat member libraries worldwide

Fire effects on soil nitrogen dynamics in coniferous forests of central Idaho, USA by Akihiro Koyama( Book )

1 edition published in 2007 in English and held by 2 WorldCat member libraries worldwide

Effects of wildfires on gross fluxes of inorganic N (i.e. NH₄ and NO₃⁻) in mineral soils were investigated using ¹⁵N isotope pool dilution in intact cores two years after three wildfires that occurred in summer 2003. Gross nitrification rates were not altered by the wildfires. However, microbial uptake rates of NO₃⁻ and NH₄, and ammonification rates were significantly reduced in burned soils relative to controls. These reduced N fluxes were caused by reduced carbon (C) availability in burned soils
Zaimu jōhō bunseki no kiso( Book )

2 editions published in 1997 in Japanese and held by 2 WorldCat member libraries worldwide

Kōporēto gabanansu no nichidoku hikaku( Book )

2 editions published in 2008 in Japanese and held by 2 WorldCat member libraries worldwide

Rieki keikaku no tatekata by Toyohiro Kono( Book )

1 edition published in 1985 in Japanese and held by 2 WorldCat member libraries worldwide

Kasō tsūka no kakutei shinkoku ga wakaru hon : kore issatsu de daijōbu by Akihiro Koyama( Book )

1 edition published in 2018 in Japanese and held by 1 WorldCat member library worldwide

Ectomycorrhizal colonization and growth of the hybrid larch F1 under elevated CO2 and O3( )

1 edition published in 2015 in English and held by 1 WorldCat member library worldwide

Keiei-zaimuron fukakujitsusei, ējenshī kosuto oyobi Nihonteki keiei by Akihiro Koyama( Book )

1 edition published in 1993 in Japanese and held by 1 WorldCat member library worldwide

Plant and microbial biomarkers suggest mechanisms of soil organic carbon accumulation in a Mojave Desert ecosystem under elevated CO2( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Abstract: We investigated how properties of soil organic matter (SOM) were altered after 10 years exposure to elevated atmospheric CO2 concentration ([CO2 ]) in a Mojave Desert ecosystem, using plant and microbial biomarkers. We focused on roles of Larrea tridentata, the dominant evergreen shrub which form islands of fertility, and biological soil crusts which have extensive cover in plant interspace. Soils to 5cm in depth were collected under L. tridentata and plant interspace, and biological soil crusts to 0.5cm in depth under three cover types, Pleuraphis rigida, a C4 grass, shrubs and plant interspace. Soil organic carbon contents were not significantly different between elevated and ambient [CO2 ]. However, significantly higher abundance of n -alkanes, a major constituent of foliage wax material, occurred in the elevated compared to ambient [CO2 ] plots in the soils collected under L. tridentata, but no such difference was found in the soils at plant interspace or the biological soil crusts. There was no significant difference in abundance of microbial phospholipid fatty acids between the CO2 treatments in the soils of either cover types. However, neutral lipid fatty acid abundance was significantly higher under elevated than ambient [CO2 ] in the soils under L. tridentata, whereas no such significant difference was observed at plant interspace. These results emphasize important roles of the dominant shrubs in SOM formation under elevated [CO2 ] in arid ecosystems. Elevated [CO2 ] stimulated growth of L. tridentata in wet years, and aboveground litter deposition via senescence contributed to SOM formation in islands of fertility. In addition, elevated [CO2 ] stimulated soil microbial turnover rates in rhizosphere of L. tridentata, which left more soil microbial necromass, a major SOM source. We concluded that responses of dominant shrubs to elevated [CO2 ] can stimulate SOM formation in arid ecosystems, but biological soil crusts may have limited capacity. Highlights: Elevated CO2 increased microbial and plant biomarkers in soils under shrub. Elevated CO2 did not affect microbial and plant biomarkers in interspace soils. Elevated CO2 had little effect on organic matter in biological soil crusts
Rieki keikaku no tatekata( Book )

1 edition published in 1985 in Japanese and held by 1 WorldCat member library worldwide

Legacy of marine-derived nitrogen in riparian conifer foliage of central Idaho, USA by Akihiro Koyama( )

1 edition published in 2002 in English and held by 1 WorldCat member library worldwide

Dītīpī shisutemu yōgo jiten : konpyūta kara insatsu made( Book )

1 edition published in 1996 in Japanese and held by 1 WorldCat member library worldwide

 
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Alternative Names
Koyama, Akihiro 1953-

소산명굉 1953-

コヤマ, アキヒロ

コヤマ, アキヒロ 1953-

小山明宏 1953-

Languages