Physiological tolerances of three sympatric riparian wolf spiders (Araneae: Lycosidae) correspond with microhabitat distributions

DeVito, Jill; Meik, Jesse M.; Gerson, Marina M.; Formanowicz, Daniel R.

doi:10.1139/z04-090

Cited by 47 publications

(50 citation statements)

References 20 publications

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“…4). The fact that spider species are typically adapted to a narrow set of abiotic factors (e.g., Moring and Stewart, 1994;DeVito et al, 2004) helps explain the changes in species composition at different latitudes and different elevations within each latitude. Local climate changes substantially with increasing elevation through adiabatic cooling, and changes across spatial gradients beget changes in habitat (Tilman and Pacala, 1993).…”

Section: Discussionmentioning

confidence: 99%

“…Spiders (Arachnida: Araneae) are a model taxon for investigating the effects of spatial gradients on species assemblages at regional scales (i.e., 200 -4000 km, Waide et al, 1999). Spiders readily respond to acute changes in habitat heterogeneity (Downie et al, 1995), temperature, and humidity (DeVito et al, 2004). The fine spatial scale at which spiders partition these abiotic changes (Moring and Stewart, 1994) makes them suitable to assess species assemblage patterns across spatial gradients at regional extents.…”

Section: Introductionmentioning

confidence: 99%

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Spider Assemblages across Elevational and Latitudinal Gradients in the Yukon Territory, Canada

Bowden¹,

Buddle²

2010

ARCTIC

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ABSTRACT. Arthropod assemblages in the Arctic are set for substantial changes in response to climate change, yet we know little about the ecological structure of many groups in the North. We tested the effects of elevation and latitude on northern spider assemblages by sampling along nine mountains across three latitudes in the Yukon Territory, Canada. Spiders were collected in 216 pitfall traps placed at four elevations along each of the nine mountains, representing 36 sites sampled across three latitudes (i.e., distinct mountain ranges). We collected 1954 individuals representing 89 species, 57 genera, and 12 families of spiders. Using nested ANOVAs, we found significant main effects of latitude, elevation, and an interaction of the two factors on species richness and abundance. Using MRPP and NMS ordination, we also found significant effects of latitude and mountain on species composition, but within each of the three latitudes, only elevation produced significant effects. Our study suggests that changes along spatial gradients associated with changes in habitat can have significant effects on the structure of spider assemblages, but responses vary among mountain ranges. We show that within a given mountain range, individual mountains may be used as spatial replicates for studies about northern arthropod assemblages.Key words: spider assemblages, elevation, latitude, Yukon Territory, diversity, species composition, terrestrial arthropods, Araneae RÉSUMÉ. Les assemblages d'arthropodes de l'Arctique connaîtront des changements substantiels en raison du changement climatique mais malgré cela, nous en savons peu sur la structure écologique de nombreux groupes du Nord. Nous avons mis à l'épreuve les effets de l'élévation et de la latitude sur les assemblages d'araignées du Nord en prélevant des échantillons sur neuf montagnes réparties sur trois latitudes dans le territoire du Yukon, au Canada. Les araignées ont été recueillies à l'aide de 216 pièges placés à quatre élévations différentes le long de chacune des neuf montagnes, ce qui a représenté 36 emplacements échantillonnés sur trois latitudes (c'est-à-dire des chaînes de montagnes distinctes). Nous avons recueilli 1 954 individus représentant 89 espèces, 57 genres et 12 familles d'araignées. À l'aide d'analyses de variances (ANOVA), nous avons relevé d'importants effets découlant de la latitude, de l'élévation et de l'interaction de deux facteurs sur la richesse et l'abondance des espèces. Au moyen de l'ordination MRPP et NMS, nous avons également constaté que la latitude et la montagne ont des incidences considérables sur la composition des espèces, mais au sein de chacune des trois latitudes, seule l'élévation produisait des effets importants. Notre étude laisse entendre que les changements en matière de gradients spatiaux liés aux changements d'habitat peuvent avoir des effets considérables sur la structure d'assemblages d'araignées, mais les réactions varient d'une chaîne de montagne à l'autre. Nous montrons que dans une chaîne de montagne donnée, les mont...

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Spider Assemblages across Elevational and Latitudinal Gradients in the Yukon Territory, Canada

Bowden¹,

Buddle²

2010

ARCTIC

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“…An ecological guild is a group of taxa co-existing in the same environment and exploiting the same resources, which can display different adaptations to abiotic factors (DeVito et al, 2004;Fauth et al, 1996). The ecological guilds of Passy (2007) were developed based on diatoms nutrients preferenda and their resistance to water turbulence.…”

Section: Introductionmentioning

confidence: 99%

Modelling diatom life forms and ecological guilds for river biomonitoring

Marcel¹,

Berthon²,

Castets³

et al. 2017

Knowl. Manag. Aquat. Ecosyst.

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-Biomonitoring is central to the European Union's Water Framework Directive (WFD) and to the French water and aquatic environmental law, but most diatom indices do not separate different anthropogenic impacts. To address this gap, the effect of water chemistry on diatom ecological guilds and life forms was assessed in order to indicate stream perturbations. Generalised additive models (GAMs) were built on a large-scale data set of 1571 samples from the French monitoring network. The relationships between diatom ecological guild and life form metrics were investigated by Principal components analysis and the results predicted by GAMs. The models characterised eight chemical parameters that modified adaptive strategies (ecological guilds) and growth morphology (life forms). Total phosphorus, conductivity, nitrate and pH are the main influencing factors, followed by temperature, dissolved oxygen and organic matter. The findings confirm three groups of diatoms with different adaptive strategies: 1 -fast moving species, 2 -species growing close to the substrate and 3 -species extending to the surface layers of the biofilm. Thirteen diatom metrics displayed a variety of responses to different ranges of the eight chemical parameters. These metrics could be used to help to identify and quantify which chemical alterations are caused by polluted effluents in rivers.Keywords: benthic diatoms / ecological guilds / biological traits / biomonitoring / generalised additive model Résumé -Modélisation des formes de vie et guildes écologiques des diatomées pour la bioindication en rivières. La bioindication est centrale dans la directive cadre européenne sur l'eau et la loi française sur l'eau, mais la plupart des indices diatomiques ne séparent pas les différents impacts anthropiques. Pour combler ce manque, l'effet de la physico-chimie de l'eau sur les guildes écologiques et formes de vies des diatomées a été étudié pour indiquer des perturbations des cours d'eau. Des modèles additifs généralisés (GAMs) ont été construits sur un jeu de données de 1571 échantillons des réseaux de suivi des cours d'eau français. Les relations entre les métriques de guildes écologiques et formes de vie des diatomées ont été étudiées par une ACP et les résultats prédits par des GAMs. Les modèles ont caractérisé huit paramètres physico-chimiques qui modifient les stratégies adaptatives (guildes écologiques) et morphologies de croissance (formes de vie). Le phosphore total, la conductivité, les nitrates et le pH sont les facteurs les plus influents, suivis par la température, l'oxygène dissous et la matière organique. Les résultats confirment trois groupes de diatomées avec des stratégies adaptatives différentes : 1 -les espèces se déplaçant rapidement, 2 -les espèces proches du substrat et 3 -les espèces s'étendant vers la surface du biofilm. Quatorze métriques diatomiques ont montré une variété de réponses à différentes gammes de valeurs des huit paramètres physico-chimiques. Ces métriques pourraient être utilisées pour aider à identifier ...

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“…The VPD presented to the test group exceeded slightly the values recorded at night in the understory. The low body mass decrease of the control group shows that our setup did not generate general stress for the spiders, which otherwise could have affected the measurements and caused much higher mortality (DeVito et al, 2004). In contrast to the very low losses in body mass in the control group, there were significantly higher decreases under the drier conditions of the test group, which therefore can be mainly attributed to water loss.…”

Section: Discussionmentioning

confidence: 85%

“…Besides interspecific interactions, community patterns may also be influenced by abiotic factors, resulting in specific habitat selection matched to physiological traits (Kneitel and Chase, 2004;Morin, 2011). Because spiders are very diverse and abundant in most habitats, they may serve as model organisms to study some of these traits and their contribution to community organization (Wise, 1993;Barth, 2001;DeVito et al, 2004;Herberstein, 2011). So far, biological aspects of most tropical spiders have been quite poorly studied.…”

Section: Introductionmentioning

confidence: 99%

Desiccation resistance reflects patterns of microhabitat choice in a Central-American assemblage of wandering spiders

Lapinski

Tschapka

2014

Journal of Experimental Biology

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The lowland rainforest of northeastern Costa Rica harbours an assemblage of large wandering spider species belonging to three habitat subguilds: (1) semi-aquatic, (2) forest ground dwelling and (3) vegetation dwelling. We hypothesized that desiccation resistance should differ among species preferring different microhabitats and the associated microclimate. Desiccation resistance was assessed by: (1) measuring water loss rates of the spiders under relatively dry experimental conditions, and (2) recording desiccation susceptibility, i.e. the reactions of the spiders to a relatively dry environment. High water loss rates and desiccation susceptibility of the semi-aquatic and forest-ground-dwelling subguilds clearly mirrored the relatively humid microclimate of the understory. Significantly lower water loss rates and desiccation susceptibility of the vegetation-dwelling species reflected the highly variable, often dry and hot conditions of the rainforest canopy and forest edge habitats. Vegetation-dwelling wandering spiders are therefore physiologically better adapted to dry conditions than the semi-aquatic and forest-ground-dwelling species. The results illustrate the significance of physiological characteristics for explaining both species-specific habitat use and, in a larger context, niche partitioning within a community.KEY WORDS: Ecology, Physiology, Rainforest, Ctenidae, Trechaleidae, Canopy INTRODUCTIONPatterns of sympatry among animals are still not fully understood. Besides interspecific interactions, community patterns may also be influenced by abiotic factors, resulting in specific habitat selection matched to physiological traits (Kneitel and Chase, 2004;Morin, 2011). Because spiders are very diverse and abundant in most habitats, they may serve as model organisms to study some of these traits and their contribution to community organization (Wise, 1993;Barth, 2001;DeVito et al., 2004;Herberstein, 2011). So far, biological aspects of most tropical spiders have been quite poorly studied. Araneomorph wandering spiders are common in the tropics and often form assemblages consisting of seven or more large species (Höfer et al., 1994;Gasnier et al., 2002;Lapinski and Tschapka, 2013). Lapinski and Tschapka (Lapinski and Tschapka, 2013) reported on habitat use within a guild of medium to large species of araneomorph wandering spiders in a Costa Rican lowland rainforest. Species grouped into three habitat subguilds: (1) semi- (Ctenidae). In the vegetation-dweller subguild, C. coccineus was most abundant within the forest and was found up to 11 m above ground on trees, while the latter two species were mainly found on higher vegetation in treeless areas. Distinct differences in their ability to move on smooth surfaces and the corresponding morphological traits matched the ecological preferences of these species (Lapinski and Tschapka, 2013) (W.L. and M.T., unpublished data). This supports the hypothesis that specific traits play key roles in shaping community structure (Kneitel and Chase, 2004). RESEARC...

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Physiological tolerances of three sympatric riparian wolf spiders (Araneae: Lycosidae) correspond with microhabitat distributions

Cited by 47 publications

References 20 publications

Spider Assemblages across Elevational and Latitudinal Gradients in the Yukon Territory, Canada

Spider Assemblages across Elevational and Latitudinal Gradients in the Yukon Territory, Canada

Modelling diatom life forms and ecological guilds for river biomonitoring

Desiccation resistance reflects patterns of microhabitat choice in a Central-American assemblage of wandering spiders

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