Does variable stand structure associated with multi-cohort forests support diversity of ground beetle (Coleoptera, Carabidae) communities in the central Nearctic boreal forest?

Barkley, Erica Patricia; Malcolm, Jay R.; Smith, Sandy M.; Bellocq, M. Isabel

doi:10.1007/s11676-016-0252-z

Cited by 5 publications

(1 citation statement)

References 34 publications

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“…However, the diversity and structure of carabid assemblages are also affected by local factors connected with various ages of tree stands (du Bus de Warnaffe and Lebrun 2004), diameter distribution of trees, understory thickness, and the percentage share of deciduous species (Barkley et al 2016) as well as by the thickness and humidity of the litter layer and humus. According to Humphrey et al (1999) and Jukes et al (2001), extensive spruce canopy cover and high organic matter content in soil will lower carabid diversity and species richness.…”

Section: Introductionmentioning

confidence: 99%

Carabids benefit more from pine stands with added understory or second story of broad-leaved trees favored by climate change than from one-storied pine stands

2018

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The released excess anthropogenic nitrogen and carbon produces habitat enrichment, as exemplified by the modification of one-storied pine stands by introducing deciduous species into the understory or second story. In this study, we discuss the validity of pine stand modification by pitfall-trapping epigeic carabid beetles. Two hypotheses were formulated: (1) proportion of late-successional species is higher in assemblages inhabiting pine stands with understory or a second story than in one-storied pine stands; (2) plant litter composition affects carabid beetle assemblages more than other environmental variables. Additionally, characteristic carabid species of the respective pine stand types were identified. GLMM analysis revealed a higher proportion of late-successional species in pine stands with understory or a second story than in one-storied ones. NMDS separated those pine stand types. RDA analysis indicated that pine litter and humus had the strongest effect on carabid beetle assemblage structure in one-storied stands, being drier and thicker in this stand type than in the others. Indicator value analysis identified two characteristic non-forest species in one-storied stands The study revealed that the introduction of understory and particularly a second story into pine stands increased carabid beetle diversity and the proportion of latesuccessional species, confirming the validity of pine stand modification.

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Section: Introductionmentioning

confidence: 99%