Frankincense tree recruitment failed over the past half century

Tolera, Motuma; Sass‐Klaassen, Ute; Eshete, Abeje; Bongers, Frans; Sterck, Frank J.

doi:10.1016/j.foreco.2013.04.036

Cited by 60 publications

(51 citation statements)

References 59 publications

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“…In Ethiopia, B. papyrifera tree stands occur mainly in the North, Northeast, Northwest and Western parts of the country (Eshete et al 2011;Girma et al 2013) and in Combretum-Terminalia and Acacia-Commiphora woodlands. B. papyrifera is a widespread, slow growing and long-lived (>100 years) species (Tolera et al, 2013). It is a deciduous tree, monoecious with sweet-scented flowers, frequently visited by honeybees for pollen and nectar (Fichtl and Admasu 1994), indicating honeybees as one of its pollinators.…”

Section: Study Speciesmentioning

confidence: 99%

“…Populations in Northern (Abergele) and Northwestern (Metema) Ethiopia are suffering from lack of saplings and small trees (Abiyu et al 2010;Eshete et al 2011;Groenendijk et al 2012;Tolera et al 2013). In these Boswellia populations, non-permanent seedlings (seedlings of which the shoots die back during the dry season and reappear in the rainy season) are abundant, but they do not develop to the sapling stage mainly because of the impacts of frequent forest fire and intensive grazing in the area (Groenendijk et al 2012;Tolera et al 2013). A similar situation was reported for Eritrea Rijkers et al 2006) and Sudan (Adam and El Tayeb 2008;Abtew et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Fine-scale spatial genetic structure in the frankincense tree Boswellia papyrifera (Del.) Hochst. and implications for conservation

Addisalem

Duminil

Wouters

et al. 2016

Tree Genetics & Genomes

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The fine-scale genetic structure and how it varies between generations depends on the spatial scale of gene dispersal and other fundamental aspects of species' biology, such as the mating system. Such knowledge is crucial for the design of genetic conservation strategies. This is particularly relevant for species that are increasingly fragmented such as Boswellia papyrifera. This species occurs in dry tropical forests from Ethiopia, Eritrea and Sudan and is an important source of frankincense, a highly valued aromatic resin obtained from the bark of the tree. This study assessed the genetic diversity and fine-scale spatial genetic structure (FSGS) of two cohorts (adults and seedlings) from two populations (Guba-Arenja and Kurmuk) in Western Ethiopia and inferred intrapopulation gene dispersal in the species, using microsatellite markers. The expected heterozygosity (H E ) was 0.664-0.724.The spatial analyses based on kinship coefficient (F ij ) revealed a significant positive genetic correlation up to a distance of 130 m. Spatial genetic structure was relatively weak (Sp = 0.002-0.014) indicating that gene dispersal is extensive within the populations. Based on the FSGS patterns found, we estimate indirectly gene dispersal distances of 103 and 124 m for the two populations studied. The high heterozygosity, the low fixation index and the low Sp values found in this study are consistent with outcrossing as the (predominant) mating system in B. papyrifera. We suggest that seed collection for ex situ conservation and reforestation programmes of B. papyrifera should use trees separated by distances of at least 100 m but preferably 150 m to limit genetic relatedness among seeds from different trees. Communicated by F. GugerliElectronic supplementary material The online version of this article

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Section: Study Speciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fine-scale spatial genetic structure in the frankincense tree Boswellia papyrifera (Del.) Hochst. and implications for conservation

Addisalem

Duminil

Wouters

et al. 2016

Tree Genetics & Genomes

View full text Add to dashboard Cite

show abstract

“…Examples are J. procera (e.g., Wils et al, 2010), and Boswellia papyrifera in northern Ethiopia (Tolera et al, 2013), and several species in the Acacia-dominated woodland in the central rift valley (Gebrekirstos et al, 2008). Since the study site experiences a unimodal rainfall regime with only two months with rainfall above 100 mm (Fig.…”

Section: Stem Density Tree Size and Growth Dynamicsmentioning

confidence: 99%

Tree dieback affects climate change mitigation potential of a dry afromontane forest in northern Ethiopia

Mokria

Gebrekirstos

Aynekulu

et al. 2015

Forest Ecology and Management

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“…1a and b). Tree age, and radial growth of the recent five years (hereafter radial growth) were determined from the increment cores (Tolera et al, 2013b).…”

Section: Data Collectionmentioning

confidence: 99%