Restoring native forest ecosystems after exotic tree plantation in Madagascar: combination of the local ectotrophic species Leptolena bojeriana and Uapaca bojeri mitigates the negative influence of the exotic species Eucalyptus camaldulensis and Pinus patula

Baohanta, Rondro Harinisainana; Thioulouse, Jean; Ramanankierana, Heriniaina; Prin, Yves; Rasolomampianina, Rado; Baudoin, Ezékiel; Rakotoarimanga, N.; Galiana, Antoine; Randriambanona, Herizo; Lebrun, Michel; Duponnois, Robin

doi:10.1007/s10530-012-0238-5

Cited by 24 publications

(18 citation statements)

References 58 publications

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“…Where exotic pines have established in already forested landscapes, trends are equivocal, demonstrating the importance of the existence and identity of matrix vegetation, consistent with our third hypothesis. EM inoculum potential was lower (Baohanta et al 2012), higher (Nuñez et al 2009), or the same (Dehlin et al 2008) between exotic pine stands and adjacent native forest. While we have some information on the effects of pine invasion on EM inoculum potential, missing are data on actual abundance of EM fungi in soils.…”

Section: Abundancementioning

confidence: 90%

“…EM fungi associated with invasive pine tend to be nonnative (Dickie et al 2010). In the majority of cases, EM fungal communities of invading pine tend to be species poor and different from those present in native forests (Table 3) (Baohanta et al 2012;Barroetaveña et al 2007Barroetaveña et al , 2010O'Hanlon and Harrington 2012b;Salomon et al 2011). Dispersal limitation and lack of compatible EM fungi has, in some cases, limited the spread of pine in novel regions (Collier and Bidartondo 2009;Nuñez et al 2009).…”

Section: Community Composition and Diversitymentioning

confidence: 99%

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Consequences for ectomycorrhizal fungi of the selective loss or gain of pine across landscapes

Karst

Randall

Gehring

2014

Botany

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Altered disturbance regimes and novel introductions are causing rapid shifts in the distribution of pines (Pinus L.). The functionally obligate symbiosis between pines and ectomycorrhizal (EM) fungi dictates that shifts in the distribution of one partner will affect the distribution of the other. In this review, we examine evidence for three hypotheses. (1) The loss of photosynthates through stress or tree mortality decreases the abundance of EM fungi and selects for less carbon-demanding species.(2) Pine introductions initiate establishment of novel EM fungal communities. (3) The extent of shifts in EM fungal abundance and community composition is mediated by surrounding vegetation. We find support for these hypotheses though changes in EM fungal abundance are variable and context-dependent. We posit that the consequences of shifts in EM fungal abundance and community composition extend beyond the individual tree to the landscape; these changes may affect population dynamics of both symbionts, ecosystem processes, and the conservation and evolution of fungi. In addition to conducting baseline surveys to assess the distribution of EM fungi, increasing our understanding of their function, morphology, propagation, and controls on host-specificity, and shifts would also assist in predicting the trajectory of ecosystems following the loss or gain of pine.Résumé : Les régimes de perturbation modifiés et les nouvelles introductions sont responsables des déplacements rapides de la distribution des pins (Pinus L.). La symbiose fonctionnelle obligée entre les pins et les champignons ectomycorhizes (EM) signifie que des changements dans la distribution d'un partenaire affectera la distribution de l'autre. Dans cet article de revue, les auteurs examinent les données qui soutiennent trois hypothèses. (1) La perte de photosynthats à cause du stress ou de la mortalité des arbres diminue l'abondance des champignons EM et sélectionne les espèces à demande plus faible en carbone.(2) L'introduction du pin initie l'établissement de nouvelles communautés d'EM fongiques. (3) L'étendue des changements d'abondance des EM fongiques et la composition de la communauté passent par l'intermédiaire de la végétation environnante. Les auteurs ont trouvé un appui à ces hypothèses à travers le fait que les changements d'abondance des EM fongiques sont variables et dépendent du contexte. Ils postulent que les conséquences de ces déplacements sur le plan de l'abondance des EM fongiques et de la composition de la communauté vont au delà de l'arbre individuel vers l'écosystème ; ces changements peuvent affecter la dynamique de la population des deux symbiotes, les processus de l'écosystème et la conservation et l'évolution des champignons. En plus de réaliser des estimations de référence afin d'évaluer la distribution des EM fongiques, il est nécessaire de mieux comprendre leur fonction, leur morphologie, leur propagation et les contrôles de la spécificité à un hôte et des déplacements, afin de prédire la trajectoire des écosystèmes à la suite d'une...

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Section: Abundancementioning

confidence: 90%

Section: Community Composition and Diversitymentioning

confidence: 99%

Consequences for ectomycorrhizal fungi of the selective loss or gain of pine across landscapes

Karst

Randall

Gehring

2014

Botany

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“…The trees affect soil chemistry, soil biology, and soil erosion, as well as hydrology, often in complex ways [109,110]. Several of the species common in the new tree cover (Acacia spp., Pinus spp.)…”

Section: On Resilient Livelihoods and Sustainable Environmentsmentioning

confidence: 99%

Forest Transition in Madagascar’s Highlands: Initial Evidence and Implications

McConnell

Viña

Kull

et al. 2015

Land

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Abstract:Madagascar is renowned for the loss of the forested habitat of lemurs and other species endemic to the island. Less well known is that in the highlands, a region often described as an environmental "basket-case" of fire-degraded, eroded grasslands, woody cover has been increasing for decades. Using information derived from publically available high-and medium-resolution satellites, this study characterizes tree cover dynamics in the highlands of Madagascar over the past two decades. Our results reveal heterogeneous patterns of increased tree cover on smallholder farms and village lands, spurred by a mix of endogenous and exogenous forces. The new trees play important roles in rural livelihoods, providing renewable supplies of firewood, charcoal, timber and other products and services, as well as defensible claims to land tenure in the context of a decline in the use of hillside commons for grazing. This study documents this nascent forest transition through Land Change Science techniques, and provides a prologue to political ecological analysis by setting these changes in their social and environmental context and interrogating the costs and benefits of the shift in rural livelihood strategies. OPEN ACCESSLand 2015, 4 1156

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“…Plantations have been characterized by low levels of native biodiversity, ranging from low number of bryophyte species to altered composition of bird or mammal assemblages (Bremer & Farley ; Baker & Murray ). Exotic plants can induce allelopathic effects (Baohanta et al ), resulting in an altered biochemical cycling and affecting the soil properties and the belowground soil microbial communities (Baohanta et al ; Liao et al ). For instance, litter of exotic species is often different in quality (i.e.…”

Section: Introductionmentioning

confidence: 99%

Contrasting Cloud Forest Restoration Potential Between Plantations of Different Exotic Tree Species

Thijs

Aerts

Moortele

et al. 2014

Restoration Ecology

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The role of exotic tree plantations for biodiversity conservation is contested. Such plantations nevertheless offer various ecosystem service benefits, which include carbon storage and facilitation of indigenous tree species regeneration. To assess forest restoration potential in tropical exotic tree plantations, we assessed native cloud forest tree regeneration in 166 plots in ca. 50-year-old plantations of five timber species that are widely used in tropical plantations (Pinus patula, Eucalyptus saligna, Cupressus lusitanica, Grevillea robusta and Acacia mearnsii ). Differences in species abundance, diversity and composition were compared among plantations, and between plantations and disturbed and undisturbed indigenous Afromontane cloud forest (southeast Kenya) relicts after controlling for environmental variation between plots (i.e. altitude, distance to indigenous forest, soil depth, slope, aspect) and for environmental and stand structural variation (i.e. dominant tree height and basal area). Regenerating trees were mostly early-successional species. Indigenous tree species regeneration was significantly higher in Grevillea plantations, where the seedling community also included latesuccessional tree species. Regeneration under Eucalyptus was particularly poor. Acacia had a strong invasive nature, reducing its potential role and usefulness in indigenous forest restoration. Our study underlined that exotic tree plantations have differential effects on native tree species regeneration, with high potential for Grevillea plantations and low potential for invasive exotic species.

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Restoring native forest ecosystems after exotic tree plantation in Madagascar: combination of the local ectotrophic species Leptolena bojeriana and Uapaca bojeri mitigates the negative influence of the exotic species Eucalyptus camaldulensis and Pinus patula

Cited by 24 publications

References 58 publications

Consequences for ectomycorrhizal fungi of the selective loss or gain of pine across landscapes

Consequences for ectomycorrhizal fungi of the selective loss or gain of pine across landscapes

Forest Transition in Madagascar’s Highlands: Initial Evidence and Implications

Contrasting Cloud Forest Restoration Potential Between Plantations of Different Exotic Tree Species

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