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Published online 29 June 2007
Published in Soil Sci Soc Am J 71:1389-1397 (2007)
DOI: 10.2136/sssaj2006.0069
© 2007 Soil Science Society of America
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Tree Species Effects on Soil Properties in Experimental Plantations in Tropical Moist Forest

A. E. Russella,*, J. W. Raichb, O. J. Valverde-Barrantesb and R. F. Fisherc

a Dep. of Natural Resource Ecology and Management, Iowa State Univ., Ames, IA 50011
b Dep. of Ecology, Evolution and Organismal Biology, Iowa State Univ., Ames, IA 50011
c Texas A&M Univ., College Station, TX 77843


Figure 1
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Fig. 1. Soil organic carbon (SOC) stocks in Year 15 in experimental plantations on abandoned pasture at La Selva Biological Station, Costa Rica. Data are for the 0- to 15-cm depth. Hyal = Hyeronima alchorneoides; Pema = Pentaclethra macroloba; Pipa = Pinus patula ssp. tecunumanii; Viko = Virola koschnyi; Vofe = Vochysia ferruginea; and Vogu = Vochysia guatemalensis. Dashed line indicates baseline SOC. Abandoned pasture and mature forest reference sites were not included in the ANOVA. Error bars are standard errors.

 

Figure 2
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Fig. 2. Soil organic C and total forest floor litter mass under six tropical tree species at La Selva Biological Station, Costa Rica. Soils data are for the 0- to 15-cm depth. Symbols: • = Hyeronima alchorneoides, {bigcirc} = Pentaclethra macroloba, {blacktriangleup} = Pinus patula, {nabla} = Virola koschnyi, and {blacksquare} = Vochysia guatemalensis.

 

Figure 3
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Fig. 3. Potential C mineralization in experimental plantations at La Selva Biological Station, Costa Rica, determined as CO2–C released during laboratory incubations of soil from 15-yr-old plantations and abandoned pasture and mature forest reference sites. Data are for the 0–15 cm depth. Hyal = Hyeronima alchorneoides; Pema = Pentaclethra macroloba; Pipa = Pinus patula ssp. tecunumanii; Viko = Virola koschnyi; Vofe = Vochysia ferruginea; and Vogu = Vochysia guatemalensis. Reference sites were not included in the ANOVA. Error bars are standard errors.

 

Figure 4
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Fig. 4. Soil organic C as a function of fine-root ingrowth and non-woody litterfall in experimental plantations at La Selva Biological Station, Costa Rica. Symbols: • = Hyeronima alchorneoides, {bigcirc} = Pentaclethra macroloba, {blacktriangleup} = Pinus patula, {nabla} = Virola koschnyi, and {blacksquare} = Vochysia guatemalensis.

 

Figure 5
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Fig. 5. Relationships between soil organic C, potential C mineralization (as CO2–C released), fine root lignin, and fine-root Al in experimental plantations at La Selva Biological Station, Costa Rica. Symbols: • = Hyeronima alchorneoides, {bigcirc} = Pentaclethra macroloba, {blacktriangleup} = Pinus patula, {nabla} = Virola koschnyi, and {blacksquare} = Vochysia guatemalensis.

 





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