Allelopathy in Forested Ecosystems

Mallik, Azim U.

doi:10.1007/978-0-387-77337-7_19

Cited by 20 publications

(18 citation statements)

References 92 publications

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“…For 30-year-old stands, allelopathic suppression due to the acidity of conifer litter (Mallik, 2008) can explain why post-harvest, naturally regenerating stands were most different from fire-origin and intensive silviculture. Lichen was not abundant and rarely present in young fire-origin stands, consistent with other understory studies in boreal forests (Hart and Chen, 2008).…”

Section: Discussionmentioning

confidence: 98%

Influence of post-harvest silviculture on understory vegetation: Implications for forage in a multi-ungulate system

Boan¹,

McLaren²,

Malcolm³

2011

Forest Ecology and Management

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Section: Discussionmentioning

confidence: 98%

Influence of post-harvest silviculture on understory vegetation: Implications for forage in a multi-ungulate system

Boan¹,

McLaren²,

Malcolm³

2011

Forest Ecology and Management

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“…, Inderjit and Weiner , Nilsson and Wardle ). For instance, the fern species P. aquilinum is known to affect forest regeneration by allelopathic interference (Mallik ).…”

Section: Discussionmentioning

confidence: 99%

“…This can be related to either abundance changes ( H 3a , cover used as proxy) or shifts in species composition ( H 3b ) of understory plants. Alternatively, understory plants can also interfere with canopy trees or tree seedlings through allelopathy (Nilsson and Wardle , Mallik ). A forth alternative hypothesis related to abiotic changes was also tested.…”

Section: Introductionmentioning

confidence: 99%

Plant interactions as biotic drivers of plasticity in leaf litter traits and decomposability of Quercus petraea

Henneron

Chauvat

Archaux³

et al. 2017

Ecological Monographs

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The importance of plant litter traits and decomposability for nutrient cycling processes and plant community dynamics through plant–litter–soil feedbacks has been largely emphasized. However, the role of biotic interactions as drivers of intraspecific variability in litter traits remains surprisingly little studied. In this study, we used a large‐scale, multi‐site network of long‐term tree removal experiments manipulating the abundance of a foundation tree species, i.e., Quercus petraea, to assess how plant interactions control intraspecific variation in oak leaf litter traits and decomposability. We studied 19 plots across eight experimental sites covering a large gradient of oak abundance, stand age, and local abiotic context. Oak leaf litter quality strongly declined with tree removal in early forest successional stage. Litter became poorer in nutrients such as N and Mg and richer in secondary metabolites such as lignin and condensed tannins. This in turn slowed its decomposition. Importantly, litter N loss switched from N release to N immobilization. Variance partitioning indicated that oak abundance explained as much variation in oak leaf litter traits as oak age and twice as much as soil inherent fertility. Confirmatory path analysis revealed that the decline of oak leaf litter quality induced by tree removal was most likely driven by a shift in understory plant species composition. Plasticity of oak leaf litter traits to the shortage of nutrient supply related to the development of understory plants competitors with higher nutrient capture and retention ability could potentially explain this response pattern. Our data also give consistent but weaker support that the decline of oak leaf litter quality could be driven by alleviated competition for light among canopy trees and subsequent enhanced crown exposure to light. Overall, our study provides evidence that biotic factors such as plant interactions are major drivers of plasticity in leaf litter traits and decomposability. This finding contributes to the emerging view that phenotypic plasticity is fundamentally related to biotic interactions for sessile organisms, especially for long‐lived and large plant species such as trees. Taking this source of functional diversity into account could help us to better understand plant community dynamics and ecological processes in terrestrial ecosystems.

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“…More recently, allelopathy was found to be implicated in renewal of forest stands (Mallik 2008). Pinus halepensis is known to release allelopathic compound (Fernandez et al 2009) with toxic effects affecting other species.…”

Section: Introductionmentioning

confidence: 99%

Fertilization and allelopathy modify Pinus halepensis saplings crown acclimation to shade

Monnier

Vila

Montès

et al. 2010

Trees

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Pinus halepensis Mill., is a Mediterranean pioneer forest species with shade-intolerant features. The purpose of this study is to better understand how stand fertility and allelopathic properties of adult trees influence shade acclimation of saplings. Crown growth and morphological plasticity were studied under different light, fertilization, and allelopathic conditions in a nursery experiment. We tested whether shade-acclimation capacity increases with fertilization, and is affected by autotoxicity due to pine leachates. We examined stem diameter, and crown characteristics (length, width, shape, and density) in a factorial experiment with two levels for each tested factor: light (full and 20% reduced light), fertilization (low and high rate of NPK fertilizer) and allelopathy (control and allelopathic leachates uptake). In our study, shading induced a significantly higher crown length, width, and surface. Fertilization strongly increased crown length and vertical expended crown shape (the ratio crown length/ crown width). Leachates uptake reduced crown length and density, highlighting an autotoxicity phenomenon. We concluded that P. halepensis saplings presented a shadeavoiding syndrome and that the crown shade-acclimation response increased with fertilization but was severely compromised by autotoxicity. We finally discuss the role of fertilization and allelopathy in early P. halepensis acclimation ability.

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Allelopathy in Forested Ecosystems

Cited by 20 publications

References 92 publications

Influence of post-harvest silviculture on understory vegetation: Implications for forage in a multi-ungulate system

Influence of post-harvest silviculture on understory vegetation: Implications for forage in a multi-ungulate system

Plant interactions as biotic drivers of plasticity in leaf litter traits and decomposability of Quercus petraea

Fertilization and allelopathy modify Pinus halepensis saplings crown acclimation to shade

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