Vegetation cover density and disturbance affected arbuscular mycorrhiza fungi spore density and root colonization in a dry Afromontane forest, northern Ethiopia

Birhane, Emiru; Fatumah, Nakiguli; Gidey, Kidane; Zenebe, Amanuel; Mohammed, Ssemwanga

doi:10.1007/s11676-017-0493-5

Cited by 21 publications

(25 citation statements)

References 63 publications

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“…AMF spore densities recorded from 51 spores/20 g air-dried soil to 225 spores/20 g air-dried soil in this study were comparable to those observed from the tropics (Birhane et al 2018). AMF spores are resting structures that are involved in "long-term" survival, and their abundance varies with the sporulation rates of different species and has also been found to be closely related to host plants (Diop et al 1994, Bever et al 1996.…”

Section: Amf Spore Density In Rhizosphere Soilsupporting

confidence: 79%

Shifts in the arbuscular mycorrhizal fungal community composition of Betula alnoides along young, middle-aged plantation and adjacent natural forest

Jing¹,

Li²,

Cui³

et al. 2020

iForest

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Biogeosciences and Forestry Biogeosciences and Forestry Shifts in the arbuscular mycorrhizal fungal community composition of Betula alnoides along young, middle-aged plantation and adjacent natural forest Yuebo Jing (1-2) , Tao Li (1) , Hongliang Cui (3) , Lingfei Li (4) , Samuel C Allen (5) , Lin Chen (1) , Yongpeng Li (2) , Zhiwei Zhao (1) Betula alnoides is a fast-growing and native timber species prevalently planted in tropical and subtropical areas of southern China. Despite the large-scale development of B. alnoides plantations, knowledge of its association with arbuscular mycorrhizal fungi (AMF) is limited. In the present study, we chose young (3-year-old sapling, P3y) and middle-aged (12-year-old stand, P12y) B. alnoides plantations and adjacent native forest (N) in the Puwen Tropical Forest Experimental Station located in Xishuangbanna prefecture of Yunnan Province, southwestern China, as study materials and explored the change in AMF community composition in the plantation chronosequence. In addition, we combined morphological methods and Illumina MiSeq sequencing techniques to analyze rhizosphere soil AMF. The results indicated that the AMF richness and diversity indexes of B. alnoides at two ages tended to be similar to those of natural growing trees in native forest. However, the specific AM fungal compositions were distinctly different, providing evidence of the conservation value of the native forest, which harbors a unique AMF diversity. Hierarchical cluster analysis further revealed that the AMF community composition of trees in the mid-aged stand (P12y) was more similar to that of naturally growing B. alnoides (N) than that of the young-aged trees (P3y), which proved the considerable resilience of AMF to the establishment of the B. alnoides plantation. A set of at least five soil properties (available phosphorus, available nitrogen, organic matter, total nitrogen and silt content) was found to play a significant role in shaping the AMF communities. These results contribute to the understanding of the impacts of B. alnoides plantations on AMF diversity and composition. Such information is critical for the efficient planting and sustainable management of B. alnoides plantations.

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Section: Amf Spore Density In Rhizosphere Soilsupporting

confidence: 79%

Shifts in the arbuscular mycorrhizal fungal community composition of Betula alnoides along young, middle-aged plantation and adjacent natural forest

Jing¹,

Li²,

Cui³

et al. 2020

iForest

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“…These results were somewhat lower than those found by Muleta et al ( 2007 , 2008 ) in agroforestry and monocultured coffee systems in southwestern Ethiopia (0.04–1.2-g −1 soil) and by Stürmer and Siqueira ( 2011 ) in distinct land-use systems in the western Brazilian Amazon (0.51–2.3-g −1 soil). However, very high spore densities were reported by Birhane et al ( 2018 ) in dry Afromontane forest in northern Ethiopia (4.5 spores g −1 soil) and by Dobo et al ( 2016a ) in a similar study area and in similar land-use types as in the current study (4.3 to 7.5 g −1 of soil). Consequently, the spore densities found here obviously represent those beyond the sporulation period, and the differences among the land-use types reflect relative rather than absolute differences.…”

Section: Discussionsupporting

confidence: 49%

Native forests but not agroforestry systems preserve arbuscular mycorrhizal fungal species richness in southern Ethiopia

et al. 2020

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The rapid conversion of native forests to farmland in Ethiopia, the cradle of biodiversity, threatens the diversity of the arbuscular mycorrhizal fungi (AMF) pivotal to plant nutrition and carbon sequestration. This study aimed to investigate the impact of this land-use change on the AMF species composition and diversity in southern Ethiopia. Soil samples were collected from nine plots in each of three land-use types: native forest, agroforestry, and khat monocropping. The plots of the three land-use types were located adjacent to each other for each of the nine replicates. Three 10 × 10m subplots per plot were sampled. AMF spores were extracted from the soil samples, spore densities were determined, and species composition and diversity were evaluated through morphological analysis. Both spore density and species richness were statistically significantly higher in the native forest than in the agroforestry plots with no clear difference to khat, whereas the true diversity (exponential of Shannon–Wiener diversity index) did not differ among the three land-use types due to high evenness among the species in agroforestry. In total, 37 AMF morphotypes belonging to 12 genera in Glomeromycota were found, dominated by members of the genera Acaulospora and Glomus. The highest isolation frequency index (78%) was recorded for Acaulospora koskei from native forest. Consequently, the agroforestry system did not appear to aid in preserving the AMF species richness of native forests relative to perennial monocropping, such as khat cultivation. In contrast, the native forest areas can serve as in situ genetic reserves of mycorrhizal symbionts adapted to the local vegetative, edaphic, and microbial conditions.

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“…The rate of AM colonization on the seedlings of our experiment showed high values compared with the same species grown in the wild environment in the Tigray region (70% for Olea, and 48%, for Dodonaea) 5) . However, seedlings under control treatment showed decreased rates of AM colonization (Table 2).…”

Section: Application Of Biochar Accelerated Height Increase Inmentioning

confidence: 44%

“…The proportion of AM fungi colonization of roots was determined using the gridline intersect method 9) . We also examined the spore density of AM fungi in the rhizosphere soil by the methods described by Birhane et al 5) . We determined that 100 g of the 0-15 cm-soil profile collected near the nursery had 1,225 spores.…”

Section: Methodsmentioning

confidence: 99%

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Effects of biochar on the growth of Olea europaea subsp. cuspidata and Dodonaea angustifolia planted in Tigray, northern Ethiopia

et al. 2019

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In northern Ethiopia, revegetation is necessary for preventing land degradation. However, planting seedlings show high mortality under arid climate. Biochar has the capacity to enhance seedling survival and symbiosis with arbuscular mycorrhizal fungi. We planted Olea europaea subsp. cuspidata and Dodonaea angustifolia into soil treated with biochar made from Acacia etbaica. We could not confirm the effects of biochar on the growth of these species; however, biochar was increased colonization of arbuscular mycorrhizal fungi. We concluded that application of biochar enhanced symbiosis with arbuscular mycorrhizal fungi under arid climate and was efficient for the revegetation in northern Ethiopia.

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Vegetation cover density and disturbance affected arbuscular mycorrhiza fungi spore density and root colonization in a dry Afromontane forest, northern Ethiopia

Cited by 21 publications

References 63 publications

Shifts in the arbuscular mycorrhizal fungal community composition of Betula alnoides along young, middle-aged plantation and adjacent natural forest

Shifts in the arbuscular mycorrhizal fungal community composition of Betula alnoides along young, middle-aged plantation and adjacent natural forest

Native forests but not agroforestry systems preserve arbuscular mycorrhizal fungal species richness in southern Ethiopia

Effects of biochar on the growth of <i>Olea europaea</i> subsp. <i>cuspidata</i> and <i>Dodonaea angustifolia</i> planted in Tigray, northern Ethiopia

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