Seasonal patterns in the structure of epigeic beetle (Coleoptera) assemblages in two subarctic habitats in Nunavut, Canada

Ernst, Crystal M.; Buddle, Christopher M.

doi:10.4039/tce.2012.111

Cited by 16 publications

(10 citation statements)

References 45 publications

(69 reference statements)

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“…However, Arctic communities also have high numbers of predators in relation to herbivores (e.g. Ernst & Buddle, ), and many Arctic arthropod herbivores are concealed feeders (Danks, ). That we found only a marginally significant negative relationship between latitude and the proportion of idiobionts in our study, and specifically that we did not observe an increase in the proportion of idiobionts at the most northern latitudes, suggests that these hypotheses may not be good explanations for the patterns observed in the tropics, or that the influence of high predation on ichneumonid diversity is mediated by some other factor or set of factors in the Arctic.…”

Section: Discussionmentioning

confidence: 99%

Extending understanding of latitudinal patterns in parasitoid wasp diversity

Timms

Schwarzfeld

Sääksjärvi

2015

Insect Conserv Diversity

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While the diversity of most taxa increases from temperate to tropical regions, the parasitoid wasp family Ichneumonidae has often been cited as an example of an anomalous diversity pattern with their highest diversity at mid‐latitudes. A rich body of literature has attempted to explain this pattern and provide hypothesised mechanisms, and recent studies have suggested that the pattern may result from biases in the data. Previous studies of patterns in ichneumonid diversity have mined catalogue data or have compared collections from tropical and temperate areas across a limited range of latitudes. Few studies are available that include species richness for all subfamilies, and none have been from regions above 60°N. To increase the number of datasets available to address these patterns, we first tested the assumption that subfamily abundance can be a strong predictor of species richness. We then compared abundances of ichneumonid subfamilies in field collections from a wide range of latitudes (25°S–81°N), and used generalised additive models to evaluate characteristics of the subfamilies as predictors of the observed patterns. We demonstrate a wide variety of latitudinal patterns, reflecting the ecological variation between subfamilies. In addition, our models show that host taxon and subfamily identities are better predictors of the shape of the relationship between subfamily abundance and latitude than other characteristics that have been previously hypothesised to be important, including parasitoid life history strategy and body size.

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Section: Discussionmentioning

confidence: 99%

Extending understanding of latitudinal patterns in parasitoid wasp diversity

Timms

Schwarzfeld

Sääksjärvi

2015

Insect Conserv Diversity

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“…Trap colour may also explain why trap type contributes more significantly to the diversity of the catches from the north boreal zone than in the high arctic or subarctic, and why the overall assemblage structure differed more significantly in the north boreal zone. More herbivorous beetles (including pollen and nectar‐feeders; i.e., pollinators) were collected in the north boreal zone, whereas the arthropod fauna of the far north is characterized by a paucity of herbivores (Ernst & Buddle, , ). It is possible that, in addition to attracting visually acute predators, yellow pan traps also attracted the more diverse pollen‐ and nectar‐feeding beetles present in the north boreal zone.…”

Section: Discussionmentioning

confidence: 99%

“…With fewer plant‐ or flower‐feeding taxa, the inclusion of two habitat types in the sampling regime enhanced the diversity of the catches from the high arctic zone more significantly than the inclusion of two trap types. Northern arthropod distributions are affected by a multitude of environmental variables (Danks, ), including temperature and moisture (Mjaaseth et al ., ; Høye & Forchhammer, ; Bolduc et al ., ; Ernst & Buddle, ) and plant community composition (Bowden & Buddle, ; Rich et al ., ).…”

Section: Discussionmentioning

confidence: 99%

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Capturing northern biodiversity: diversity of arctic, subarctic and north boreal beetles and spiders are affected by trap type and habitat

Ernst

Loboda

Buddle

2015

Insect Conserv Diversity

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Rapid environmental changes in arctic, subarctic and boreal biomes are fuelling the need for effective biodiversity monitoring programs in these regions. Terrestrial arthropods are ideal focal taxa for monitoring, but quantitative comparisons of the efficacy and outcomes of different sampling protocols are limited. Here, the influence of trap type (yellow pan trap or traditional pitfall) and habitat (wet or mesic) on the abundance and diversity of ground‐dwelling arthropods is determined for samples collected in the three northernmost ecoclimatic zones of Canada, using over 32 000 specimens of beetles and spiders. Trap and habitat both influence the abundance, richness, and assemblage composition of arthropods collected, but these effects differ between ecoclimatic zones and depend on taxonomic resolution. Sampling in different habitats yields greater diversity than sampling with different traps in the high arctic, while the inverse is true in the north boreal zone, and neither factor appears to have a significant effect on the diversity of arthropods collected in the subarctic. In all zones, the addition of recessed yellow pan traps to a traditional pitfall trap‐based sampling regime results in the capture of many additional unique species, suggesting that colour is an attractant for at least some ground‐dwelling taxa. These findings have significant implications for large‐scale terrestrial diversity monitoring programs being established or implemented in northern systems. It is recommended that sampling regimes be designed to maximize the diversity of arthropods collected, by including a minimum of two distinct habitats and by using yellow pitfall traps.

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“…This study was performed as part of the Northern Biodiversity Program, a collaborative research initiative created to document spatial and temporal arthropod diversity patterns in northern Canada (Ernst and Buddle 2013;Timms et al 2013). This study was carried out in northern Canada at 12 sites encompassing three broad ecoclimatic regions: north boreal, subarctic, and arctic (see Ernst and Buddle 2015 for a map of study sites).…”

Section: Sampling Designmentioning

confidence: 99%

Small to large-scale patterns of ground-dwelling spider (Araneae) diversity across northern Canada

Loboda

Buddle

2018

FACETS

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We examined how Arctic spider (Araneae) biodiversity is distributed at multiple spatial scales in northern Canada using a standardized hierarchical sampling design. We investigated which drivers, environmental or spatial, influence the patterns observed. Spatial patterns of Arctic spider species richness and composition were assessed in 12 sites located in arctic, subarctic, and north boreal ecoclimatic regions, spanning 30 degrees of latitude and 80 degrees of longitude. Variation in diversity was partitioned in relation to multiple environmental and spatial drivers of diversity patterns. Over 23 000 adult spiders, representing 306 species in 14 families, were collected in northern Canada, with 107 species (35% of the total species collected) representing new territorial or provincial records. Spider diversity was structured at the regional scale across ecoclimatic regions but was not structured with latitude. Longitudinal patterns of spider diversity across Canada may be explained by post-glacial dispersal. At local scales, diversity was non-randomly distributed and possibly limited by biotic interactions. We recommend the use of ecoclimatic regions as a framework for conservation of biodiversity in northern Canada and spiders as useful bioindicators that can help us understand the effects of climate change across ecoclimatic regions of northern Canada.

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Seasonal patterns in the structure of epigeic beetle (Coleoptera) assemblages in two subarctic habitats in Nunavut, Canada

Cited by 16 publications

References 45 publications

Extending understanding of latitudinal patterns in parasitoid wasp diversity

Extending understanding of latitudinal patterns in parasitoid wasp diversity

Capturing northern biodiversity: diversity of arctic, subarctic and north boreal beetles and spiders are affected by trap type and habitat

Small to large-scale patterns of ground-dwelling spider (Araneae) diversity across northern Canada

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