Abstract:
:A transformation of any natural ecosystem to an agricultural or forest system leads to an important soil modification, not only in the total carbon pool, but also in the carbon associated to the microbial biomass. This way, carbon quantification on soil quality is important for the determination of impacts of agricultural practices and land use changes. The aim of this study was to the determine, through the selective inhibition technique, the fungal and bacterial biomass, and fungal-to-bacterial ratio (F:B) in pine plantations (Pinus caribaea var. hondurensis), to establish if these parameters are sensible indicators of changes in the carbon content in Uverito soils (Venezuela). Furthermore, the inhibitor additivity ratio (IAR) and total combined inhibition (TCI) were carried out to determine if the antibiotics caused non-target inhibition. The quantification of fungal and bacterial biomass was carried out by using of cyloheximide as fungal inhibitor, and streptomycin and chloranphenicol as specific bacterial inhibitors. This research evidences that this land use change exerted a significant effect on soil microbial biomass, and shows that in pine plantations there is a dominance of the fungal component, in contrast to the native savanna, in which the bacterial biomass dominates. The substitution of native savanna by pine plantation in Uverito promotes a major soil carbon sequestration. The values of the inhibitor additivity ratio (IAR) as for native savanna as pine system, were both >1.0. The total combined inhibition (TCI) was smaller in the pine systems, from which it is possible to infer that a high proportion of microbial biomass was affected by the combination of the inhibitors.
journal_name
Rev Biol Tropjournal_title
Revista de biologia tropicalauthors
Zabala M,Gómez Ysubject
Has Abstractpub_date
2010-09-01 00:00:00pages
977-89issue
3eissn
0034-7744issn
2215-2075journal_volume
58pub_type
杂志文章abstract::The diet ofa neotropical fish species (Creagrutus bolivari) was studied using different methods: the Cortés 1997 graphic method and two relative importance indexes, one designed by George and Hadley in 1979 (% RIi) and another proposed by Cortés in 1997 (% IRIi). Only discrete prey (aquatic and terrestrial invertebrat...
journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2006-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i3.20110
更新日期:2017-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1994-04-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i1.17923
更新日期:2016-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2001-07-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i2.19632
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2009-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2014-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2011-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v1i2.15414
更新日期:2004-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i2.18415
更新日期:2016-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2003-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2011-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v62i2.11639
更新日期:2014-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i2.20691
更新日期:2016-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1994-08-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2004-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v57i1-2.11360
更新日期:2009-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2008-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 评论,信件
doi:
更新日期:2016-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v55i1.6073
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2001-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2013-03-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2008-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v61i2.11165
更新日期:2013-06-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
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更新日期:2002-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2007-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:10.15517/rbt.v64i3.18806
更新日期:2016-09-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:2012-12-01 00:00:00
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journal_title:Revista de biologia tropical
pub_type: 杂志文章
doi:
更新日期:1994-04-01 00:00:00