Comparison of soil bacterial communities associated with actinorhizal, non-actinorhizal plants and the interspaces in the sclerophyllous matorral from Central Chile in two different seasons

Farias, Francisca Ferreira; Orlando, Julieta; Bravo, Luís González; Guevara, Rafael; Carú, Margarita

doi:10.1016/j.jaridenv.2009.06.010

Cited by 11 publications

(9 citation statements)

References 64 publications

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“…Indeed, seasonal variation of bacterial communities in the sclerophyllous matorral from central Chile has been attributed to differential precipitation between seasons (Farías et al. ). Furthermore, it is known that bacteria can be passively transported by soil water (Chapin et al.…”

Section: Discussionmentioning

confidence: 99%

“…However, further studies are required to determine the direct effect of rainfall on the geographic pattern of bacterial communities in the sclerophyllous forests and vineyards. Indeed, seasonal variation of bacterial communities in the sclerophyllous matorral from central Chile has been attributed to differential precipitation between seasons (Far ıas et al 2009). Furthermore, it is known that bacteria can be passively transported by soil water (Chapin et al 2002) and thus, they can be transported by rain runoff from high-elevation forests to low-elevation vineyards, thereby homogenizing the bacterial communities between both habitats.…”

Section: Discussionmentioning

confidence: 99%

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Comparison of soil microbial communities inhabiting vineyards and native sclerophyllous forests in central Chile

Castañeda

Godoy

Manzano

et al. 2015

Ecology and Evolution

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Natural ecosystems provide services to agriculture such as pest control, soil nutrients, and key microbial components. These services and others in turn provide essential elements that fuel biomass productivity. Responsible agricultural management and conservation of natural habitats can enhance these ecosystem services. Vineyards are currently driving land‐use changes in many Mediterranean ecosystems. These land‐use changes could have important effects on the supporting ecosystems services related to the soil properties and the microbial communities associated with forests and vineyard soils. Here, we explore soil bacterial and fungal communities present in sclerophyllous forests and organic vineyards from three different wine growing areas in central Chile. We employed terminal restriction fragment length polymorphisms (T‐RFLP) to describe the soil microbial communities inhabiting native forests and vineyards in central Chile. We found that the bacterial community changed between the sampled growing areas; however, the fungal community did not differ. At the local scale, our findings show that fungal communities differed between habitats because fungi species might be more sensitive to land‐use change compared to bacterial species, as bacterial communities did not change between forests and vineyards. We discuss these findings based on the sensitivity of microbial communities to soil properties and land‐use change. Finally, we focus our conclusions on the importance of naturally derived ecosystem services to vineyards.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparison of soil microbial communities inhabiting vineyards and native sclerophyllous forests in central Chile

Castañeda

Godoy

Manzano

et al. 2015

Ecology and Evolution

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“…This symbiosis is an important source of nitrogen input into the soil resulting in higher amounts of nitrogen in soil associated to the plants than in the bulk soil (Orlando et al, 2007 ). In addition to nitrogen, microbial communities in the vicinity of plants are selectively favored by elevated carbon content and hence differed in their bacterial composition from that of the bulk soil (Orlando et al, 2007 ; Farías et al, 2009 ) or soil associated with other non-actinorhizal plants (Farías et al, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

“…While bacterial numbers and activity in general but also those associated with nitrogen cycling are low in desert ecosystems due to the lack of water (Gómez-Silva et al, 2008 ), in semiarid degraded areas nitrogen cycling processes may play a key role to assist sustainable restoration practices (Bastida et al, 2009 ). The sclerophyllous matorral has been shown previously to harbor a rather unique bacterial community making it an unique habitat compared to other Mediterranean-type semiarid ecosystems (Farías et al, 2009 ). However, whether this also applies for the functional group of denitrifiers is impossible to conclude from an approach to target the soil bacterial community in general.…”

Section: Introductionmentioning

confidence: 99%

Diversity and Activity of Denitrifiers of Chilean Arid Soil Ecosystems

Orlando¹,

Carú²,

Pommerenke³

et al. 2012

Front. Microbio.

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The Chilean sclerophyllous matorral is a Mediterranean semiarid ecosystem affected by erosion, with low soil fertility, and limited by nitrogen. However, limitation of resources is even more severe for desert soils such as from the Atacama Desert, one of the most extreme arid deserts on Earth. Topsoil organic matter, nitrogen and moisture content were significantly higher in the semiarid soil compared to the desert soil. Although the most significant loss of biologically preferred nitrogen from terrestrial ecosystems occurs via denitrification, virtually nothing is known on the activity and composition of denitrifier communities thriving in arid soils. In this study we explored denitrifier communities from two soils with profoundly distinct edaphic factors. While denitrification activity in the desert soil was below detection limit, the semiarid soil sustained denitrification activity. To elucidate the genetic potential of the soils to sustain denitrification processes we performed community analysis of denitrifiers based on nitrite reductase (nirK and nirS) genes as functional marker genes for this physiological group. Presence of nirK-type denitrifiers in both soils was demonstrated but failure to amplify nirS from the desert soil suggests very low abundance of nirS-type denitrifiers shedding light on the lack of denitrification activity. Phylogenetic analysis showed a very low diversity of nirK with only three distinct genotypes in the desert soil which conditions presumably exert a high selection pressure. While nirK diversity was also limited to only few, albeit distinct genotypes, the semiarid matorral soil showed a surprisingly broad genetic variability of the nirS gene. The Chilean matorral is a shrub land plant community which form vegetational patches stabilizing the soil and increasing its nitrogen and carbon content. These islands of fertility may sustain the development and activity of the overall microbial community and of denitrifiers in particular.

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“…Nevertheless, most previous studies on the interactions between xerophytes and soil microbial communities in arid and semiarid ecosystems (Bolton et al, 1993;Bontti et al, 2011;Farías et al, 2009;Kieft,1994;Thomson et al, 2010) have been conducted in the 0e10 or 0e20 cm soil layer, since these strata are considered to be among the most resource-rich soil bands, with higher interplay between the soil communities. It is well known that the root systems of perennial shrubs growing on hilltops, slopes, or loessial plains in the Negev Desert are able to penetrate to 30e50 cm (Evenari et al, 1982), and organic matter accumulated in the upper layer is able to be moved to deeper layers by soil fauna activity (Rodriguez-Zaragoza et al, 2005;Shamir and Steinberger, 2007).…”

Section: Introductionmentioning

confidence: 99%

Vertical distribution of soil microbial biomass and its association with shrubs from the Negev Desert

Steinberger

2012

Journal of Arid Environments

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Comparison of soil bacterial communities associated with actinorhizal, non-actinorhizal plants and the interspaces in the sclerophyllous matorral from Central Chile in two different seasons

Cited by 11 publications

References 64 publications

Comparison of soil microbial communities inhabiting vineyards and native sclerophyllous forests in central Chile

Comparison of soil microbial communities inhabiting vineyards and native sclerophyllous forests in central Chile

Diversity and Activity of Denitrifiers of Chilean Arid Soil Ecosystems

Vertical distribution of soil microbial biomass and its association with shrubs from the Negev Desert

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