Insect community composition and trophic guild structure in decaying logs from eastern Canadian pine-dominated forests

Vanderwel, Mark C.; Malcolm, Jay R.; Smith, Sandy M.; Islam, Nurul

doi:10.1016/j.foreco.2005.12.051

Cited by 98 publications

(82 citation statements)

References 45 publications

(47 reference statements)

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“…However, inner bark species were still abundant in CT areas in 2013, even if they declined from 2012 to 2013. In addition, there was no delay between the increase in abundance of inner and outer bark beetles, both within or between seasons, possibly because outer bark species recovered in this study feed on early succession fungi (Vanderwel et al 2006). The expected effect on saproxylic beetles of the woody debris gradient produced by the treatments was not observed, in part because girdled trees took two summers to die, suggesting that canopy openness had a greater effect on beetles than the amount of residual wood, which is consistent with another study of the effect of biomass removal on leaf litter invertebrates (Work et al 2014).…”

Section: Effects Of Treatments On Beetle Feeding Guildsmentioning

confidence: 65%

“…Conversely, our hypotheses for specific feeding guilds were poorly supported because beetle response to the treatments was strong and similar across guilds. Changes in chemical and structural components of dead wood occur over time and should promote beetle species succession (reviewed in Nadeau et al 2015b), with inner bark species colonizing woody debris first but declining in abundance rapidly because dead wood is only fresh for a short period (Hammond et al 2001(Hammond et al , 2004, and outer bark species colonizing later (Esseen et al 1992, Vanderwel et al 2006. However, inner bark species were still abundant in CT areas in 2013, even if they declined from 2012 to 2013.…”

Section: Effects Of Treatments On Beetle Feeding Guildsmentioning

confidence: 99%

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Experimental manipulation of habitat structures in intensively managed spruce plantations to increase their value for biodiversity conservation

MacLeanDavid

DracupEvan

GandiagaFranck

et al. 2015

The Forestry Chronicle

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Six intensively managed white spruce (Picea glauca (Moench) Voss) plantations located in three general landscape contexts (plantation dominated, hardwood dominated, and mixed hardwood and plantation) in northern New Brunswick underwent alternative commercial thinning (CT) treatments: 1) an unthinned control; and three 40% basal area CT removals, with 2) slash and tops remaining on site (status quo CT), 3) branches and tops extracted from the site (biomass removal CT), and 4) clumps of unthinned trees left, and one-half girdled to create snags (enhanced structure CT). We examined responses of taxa that have a clear connection to deadwood and thinning response: beetles and bird species that are directly dependent upon deadwood, ground vegetation species sensitive to disturbance, and small mammals that have been observed to have low density in planted stands. Results three years post-thinning showed that crown width and tree growth responded positively to CT, and herbaceous vegetation diverged from reference stands and unthinned treatments with CT, but greatest compositional change was associated with biomass removal CT. Beetles responded positively to CT, small mammal species responded both positively (red-backed voles) and negatively (woodland jumping mice) to CT, but areas dominated by plantations had negative effects on voles. Effects of CT on songbirds were unclear and their quantification would require larger treated blocks, but maintenance of habitat at the landscape level is essential for the conservation of bird species that require deadwood. The experimental biomass removal CT was least similar to both unthinned and older unmanaged stands, and may therefore be detrimental to biodiversity conservation efforts. These results are only the initial three years after treatment but set the study up to permit a long-term legacy of determining long-term responses of taxa over stand development.Keywords: commercial thinning, beetles, songbirds, small mammals, ground vegetation, deadwood, tree growth response, plantation habitat RÉSUMÉ Six plantations d' épinette blanche (Picea glauca (Moench) Voss) aménagées de façon intensive, et situées dans trois paysages forestiers différents (prédominance de plantation, prédominance de feuillus et mélange de feuillus et de plantation) dans le nord du Nouveau-Brunswick ont fait l' objet de traitements d' éclaircie alternatifs (ÉC) : 1) témoin non éclairci; et trois éclaircies commerciales à 40 % de la surface terrière avec 2) abandon des branches et des houppiers sur le parterre de coupe (ÉC statu quo), 3) enlèvement des branches et des houppiers de sur le parterre de coupe (ÉC avec prélèvement de la biomasse), et 4) maintien de groupes d'arbres non éclaircis et annelés à moitié pour créer des chicots (ÉC avec structure améliorée). Nous avons étudié les taxons qui ont un lien étroit avec le bois mort ainsi que leur réaction à l' éclaircie : les coléoptères et les oiseaux qui ont absolument besoin de bois mort, les espèces vivant dans la végétation du sol, sensibles aux ...

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Section: Effects Of Treatments On Beetle Feeding Guildsmentioning

confidence: 65%

Section: Effects Of Treatments On Beetle Feeding Guildsmentioning

confidence: 99%

Experimental manipulation of habitat structures in intensively managed spruce plantations to increase their value for biodiversity conservation

MacLeanDavid

DracupEvan

GandiagaFranck

et al. 2015

The Forestry Chronicle

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“…Tree species-specific structures (e.g. bark thickness, surface quality) become less pronounced during the decomposition process [37]. The significance of tree species as driving factor of specialization in deadwoodbased interaction networks therefore lessens with ongoing decay.…”

Section: Discussionmentioning

confidence: 99%

“…Many saproxylic beetle species show a clear preference for a particular decay stage and the turnover of community composition during the decay process has been described before [37,38]. Each successional community may contribute differently to network architecture.…”

Section: (F ) Statisticsmentioning

confidence: 96%

Trophic level, successional age and trait matching determine specialization of deadwood-based interaction networks of saproxylic beetles

et al. 2017

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The specialization of ecological networks provides important insights into possible consequences of biodiversity loss for ecosystem functioning. However, mostly mutualistic and antagonistic interactions of living organisms have been studied, whereas detritivore networks and their successional changes are largely unexplored. We studied the interactions of saproxylic (deadwood-dependent) beetles with their dead host trees. In a large-scale experiment, 764 logs of 13 tree species were exposed to analyse network structure of three trophic groups of saproxylic beetles over 3 successional years. We found remarkably high specialization of deadwood-feeding xylophages and lower specialization of fungivorous and predatory species. During deadwood succession, community composition, network specialization and network robustness changed differently for the functional groups. To reveal potential drivers of network specialization, we linked species' functional traits to their network roles, and tested for trait matching between plant (i.e. chemical compounds) and beetle (i.e. body size) traits. We found that both plant and animal traits are major drivers of species specialization, and that trait matching can be more important in explaining interactions than neutral processes reflecting species abundance distributions. High network specialization in the early successional stage and decreasing network robustness during succession indicate vulnerability of detritivore networks to reduced tree species diversity and beetle extinctions, with unknown consequences for wood decomposition and nutrient cycling.

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“…Individuals preferentially selected recently decayed snags (decay class 4), and avoided mid-(decay class 6) and advanced-decay snags (decay class 8). Saproxylic insect density in black spruce is higher in recently decayed snags (Saint-Germain et al 2007) and recently dwd (Vanderwel et al 2006). In the study area, these substrates were mainly located in post-mature coniferous stands, which Black-backed Woodpeckers have recently been shown to preferentially select for foraging (Tremblay et al 2009).…”

Section: Characteristics Of Foraging Substratesmentioning

confidence: 97%

Écologie de nidification du pic à dos noir (Picoides arcticus) en forêt boréale non brulée /

Tremblay¹

2009

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PAR JUNIOR A. TREMBLAY ECOLOGIE DE NIDIFICATION DU PIC A DOS NOIR (PICOIDES ARCTICUS) UIUQAC Mise en garde/AdviceAfin de rendre accessible au plus grand nombre le résultat des travaux de recherche menés par ses étudiants gradués et dans l'esprit des règles qui régissent le dépôt et la diffusion des mémoires et thèses produits dans cette Institution, l'Université du Québec à Chicoutimi (UQAC) est fière de rendre accessible une version complète et gratuite de cette oeuvre.Motivated by a desire to make the results of its graduate students' research accessible to all, and in accordance with the rules governing the acceptation and diffusion of dissertations and theses in this Institution, the Université du Québec à Chicoutimi (UQAC) is proud to make a complete version of this work available at no cost to the reader.L'auteur conserve néanmoins la propriété du droit d'auteur qui protège ce mémoire ou cette thèse. Ni le mémoire ou la thèse ni des extraits substantiels de ceux-ci ne peuvent être imprimés ou autrement reproduits sans son autorisation.The author retains ownership of the copyright of this dissertation or thesis. Neither the dissertation or thesis, nor substantial extracts from it, may be printed or otherwise reproduced without the author's permission. AVANT-PROPOSCette thèse est constituée de cinq chapitres : une introduction générale, une conclusion générale et trois articles originaux dont je suis l'auteur principal. Mon directeur, Dr. Jacques Ibarzabal, et mon co-directeur, Dr. Jean-Pierre Savard, sont co-auteurs pour ces trois articles. Pour chacun des articles, j'ai établi la méthodologie, mené ies travaux de terrain avec des assistants et fait les analyses statistiques appropriées. J'ai rédigé ies premiers jets de toute la thèse. Pour le chapitre III, M. Christian Dussault apparaît comme co-auteur et sa participation à l'article fut principalement à titre de support pour les analyses statistiques. La version finale qui suit est le fruit d'une collaboration fidèle avec mes directeurs. Toutes les autres personnes qui ont collaboré à cette thèse, que ce soit sur le terrain, par des discussions ou financièrement, sont remerciées dans les articles respectifs. in REMERCIEMENTSC'est un ciiché mais cela demeure tout de même vrai et incontournable; la réalisation d'une thèse de doctorat ne peut se réaliser seul et nécessite le support de plusieurs personnes. Pendant mes années au doctorat, j'ai eu le privilège de côtoyer plusieurs personnes qui m'ont grandement aidé dans toutes les étapes liées à l'accomplissement de ma thèse. La première personne qui me vient à l'esprit est évidemment mon directeur de thèse, Jacques Ibarzabal. Jacques, ta passion pour les oiseaux et la faune est contagieuse et inspirante ! Bien que nous aillons été distancés pendant la majeure partie de mon doctorat, tu as toujours été disponible et j'ai pu profiter de tes judicieux et rigoureux avis. Également, je te remercie sincèrement de m'avoir offert ce projet de thèse et de m'avoir si bien dirigé. Merci également à mon co-directeur, Je...

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Insect community composition and trophic guild structure in decaying logs from eastern Canadian pine-dominated forests

Cited by 98 publications

References 45 publications

Experimental manipulation of habitat structures in intensively managed spruce plantations to increase their value for biodiversity conservation

Experimental manipulation of habitat structures in intensively managed spruce plantations to increase their value for biodiversity conservation

Trophic level, successional age and trait matching determine specialization of deadwood-based interaction networks of saproxylic beetles

Écologie de nidification du pic à dos noir (Picoides arcticus) en forêt boréale non brulée /

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