Microbiology and Macrofaunal Activity in Soil beneath Shrub Canopies during Residue Decomposition in Agroecosystems of the Sahel

Diedhiou-Sall, Sire; Dossa, E. L.; Diédhiou, Ibrahima; Badiane, Alpha; Samba, Samba Arona Ndiaye; Khouma, M.; Sène, M.; Dick, Richard P.

doi:10.2136/sssaj2012.0284

Cited by 33 publications

(32 citation statements)

References 59 publications

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“…These results are similar but somewhat in contrast to the study of Diedhiou-Sall et al (2013) who found elevated enzyme activities for soil beneath the canopies of P. reticulatum and G. senegalensis over soil outside the influence of the shrub in Senegal. For all enzymes we assayed, although empirically higher than the shrub alone treatment, they were not statistically higher than the bare soil.…”

Section: Mango + Shrub and Soil Enzyme Activitysupporting

confidence: 65%

“…Although previous research in natural arid environments such as deserts has shown that various plant species create "islands of fertility" (Bonanomi et al, 2008;Schlesinger et al, 1996), recent research has shown that G. senegalensis and P. reticulatum deliver many more services than just nutrient cycling. This includes providing water through hydraulic lift, increased microorganism and beneficial nematode diversity in shrub rhizospheres, promotion of decomposition and nutrient mineralization, decreased P sorption, and increased nutrients for crops Diedhiou-Sall et al, 2013;Dossa et al, 2008Dossa et al, , 2010Kizito et al, 2012;Diakhaté et al, 2013). This research has shown that these two species serve as resource islands for groundnut (Arachis hypogaea) and pearl millet (Pennisetum glaucum) crops.…”

Section: Introductionmentioning

confidence: 99%

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The native shrub, Piliostigma reticulatum , as an ecological “resource island” for mango trees in the Sahel

Hernandez

Debenport

Leewis

et al. 2015

Agriculture, Ecosystems & Environment

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A B S T R A C TAfrican farmers are increasingly adopting sustainable agricultural practices including use of native shrub intercropping approaches. In one village of Sénégal (near Thiès) it was reported that farmers planted mango (Mangifera indica) seedlings within the canopies of a native shrub (Piliostigma reticulatum). Anecdotal information and qualitative observations suggested that the presence of P. reticulatum promoted soil quality and a competitive advantage for establishing mango plantations. We hypothesized that soil chemical and microbial properties of mango rhizosphere soil growing in the presence of P. reticulatum would be significantly improved over soils associated with mango growing outside the influence of P. reticulatum. The results showed that mango-shrub interplanting significantly lowered pH, and increased arbuscular mycorrhizal fungi (AMF) colonization of mango roots, enzyme activities, and microbial biomass compared to mango alone. Phylogenetic analyses by PCR-denaturing gradient gel electrophoresis (DGGE) showed that community structures of fungi, bacteria, and bacterial genes responsible for denitrification (nirK) of the soil from the rooting zone of the mango-shrub intercropping system were distinct from all other soil outside the influence of P. reticulatum. It is concluded that P. reticulatum enhances soil biological functioning and that there is a synergistic effect of intercropping mango with the native shrub, P. reticulatum, in soil quality with a more diverse community, greater AMF infection rates, and greater potential to perform decomposition and mineralize nutrients.

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Section: Mango + Shrub and Soil Enzyme Activitysupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

The native shrub, Piliostigma reticulatum , as an ecological “resource island” for mango trees in the Sahel

Hernandez

Debenport

Leewis

et al. 2015

Agriculture, Ecosystems & Environment

Self Cite

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“…Efforts in this direction show that soil organisms can be grouped into four key functional assemblages: (1) decomposers, (2) nutrient transformers, (3) ecosystem engineers and (4) biocontrollers, each composed of several functional groups which contribute to four key aggregated ecosystem functions, namely carbon transformations, nutrient cycling, soil structure maintenance and population regulation, respectively, which, through a variety of soil-based delivery processes, generate and sustain soil health (Kibblewhite et al 2008;Barrios et al 2012). Trees in agricultural landscapes can provide more favorable habitats for soil biodiversity, through microclimate buffering and continuous supply of organic matter inputs, thus fostering 'hot spots' of biological activity responsible for many ecological functions underpinning soil health (Pauli et al 2010;Ushio et al 2010;Diedhiou-Sall et al 2013;Kamau et al 2017). Increased tree cover often, but not always, also reduces pest pressures and improves pollination services (Ricketts et al 2004;Pumariño et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Contribution of trees to the conservation of biodiversity and ecosystem services in agricultural landscapes

Barrios

Valencia

Jonsson

et al. 2017

International Journal of Biodiversity Science, Ecosystem Servic

121

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The production of sufficient food for an increasing global population while conserving natural capital is a major challenge to humanity. Tree-mediated ecosystem services are recognized as key features of more sustainable agroecosystems but the strategic management of tree attributes for ecosystem service provision is poorly understood. Six agroforestry and tree cover transition studies, spanning tropical/subtropical forest zones in three continents, were synthesized to assess the contribution of tree cover to the conservation of biodiversity and ecosystem services. Loss of native earthworm populations resulted in 76% lower soil macroporosity when shade trees were absent in coffee agriculture. Increased tree cover contributed to 53% increase in tea crop yield, maintained 93% of crop pollinators found in the natural forest and, in combination with nearby forest fragments, contributed to as much as 86% lower incidence for coffee berry borer. In certain contexts, shade trees contributed to negative effects resulting from increases in abundance of white stem borer and lacebugs and resulted in 60% reduction of endangered tree species compared to forest. Managing trees for ecosystem services requires understanding which tree species to include and how to manage them for different socio-ecological contexts. This knowledge needs to be shared and translated into viable options with farming communities. ARTICLE HISTORY

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“…Termites exist in a multitude of shapes, sizes, and species. Some attain energy through shredding of leaf litter, while others derive nutrients from ingesting soil (Diedhiou‐Sall et al, 2013). Certain species are exclusively subterranean, making their home in tunnels and channels beneath the soil surface, while others build large, aboveground mounds.…”

Section: Soil Structure Transformationsmentioning

confidence: 99%

Termites Increase Soil Productivity in Semi-Arid and Arid Tropics

Welch

2014

Natural Sciences Education

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Decreased fertility of sub‐Saharan African cropland is of major concern to farmers and malnourished populations in this region. Lack of nutrients in these soils has left land degraded and unable to produce substantial agricultural yield to feed the region's people. Conservation of termite mounds native to arid and semi‐arid locals in Africa improves soil fertility. Termites and the homes they build aid in improving soils’ physical structure, organic matter content, nutrient availability, and biological activity, amongst other properties, and can be used to ameliorate degraded cropland, as a soil amendment in place of traditional fertilizer. Utilization of this natural modifier could lead to increased arable land, heightened crop yields, and reduction in sub‐Saharan African human malnutrition.

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Microbiology and Macrofaunal Activity in Soil beneath Shrub Canopies during Residue Decomposition in Agroecosystems of the Sahel

Cited by 33 publications

References 59 publications

The native shrub, Piliostigma reticulatum , as an ecological “resource island” for mango trees in the Sahel

The native shrub, Piliostigma reticulatum , as an ecological “resource island” for mango trees in the Sahel

Contribution of trees to the conservation of biodiversity and ecosystem services in agricultural landscapes

Termites Increase Soil Productivity in Semi-Arid and Arid Tropics

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