5 Works

Data from: Persistent social interactions beget more pronounced personalities in a desert-dwelling social spider

Andreas P. Modlmeier, Kate L. Laskowski, Alex E. DeMarco, Anna Coleman, Katherine Zhao, Hayley A. Brittingham, Donna R. McDermott & Jonathan N. Pruitt
The social niche specialization hypothesis predicts that repeated social interactions will generate social niches within groups, thereby promoting consistent individual differences in behaviour. Current support for this hypothesis is mixed, probably because the importance of social niches is dependent upon the ecology of the species. We test whether repeated interactions among group mates generate consistent individual differences in boldness in the social spider, Stegodyphus dumicola. In support of the social niche specialization hypothesis, we found...

Data from: Personality composition is more important than group size in determining collective foraging behaviour in the wild

Carl N. Keiser & Jonathan N. Pruitt
Describing the factors that shape collective behaviour is central to our understanding of animal societies. Countless studies have demonstrated an effect of group size in the emergence of collective behaviours, but comparatively few have accounted for the composition/diversity of behavioural phenotypes, which is often conflated with group size. Here, we simultaneously examine the effect of personality composition and group size on nest architecture and collective foraging aggressiveness in the social spider Stegodyphus dumicola. We created...

Data from: In a long-term experimental demography study, excluding ungulates reversed invader’s explosive population growth rate and restored natives

Susan Kalisz, Rachel B. Spigler & Carol C. Horvitz
A major goal in ecology is to understand mechanisms that increase invasion success of exotic species. A recent hypothesis implicates altered species interactions resulting from ungulate herbivore overabundance as a key cause of exotic plant domination. To test this hypothesis, we maintained an experimental demography deer exclusion study for 6 y in a forest where the native ungulate Odocoileus virginianus (white-tailed deer) is overabundant and Alliaria petiolata (garlic mustard) is aggressively invading. Because population growth...

Data from: Site-specific group selection drives locally adapted group compositions

Jonathan N. Pruitt & Charles J. Goodnight
Group selection may be defined as selection caused by the differential extinction or proliferation of groups. The socially polymorphic spider Anelosimus studiosus exhibits a behavioral polymorphism where females exhibit either a “docile” or “aggressive” behavioral phenotype. Natural colonies are composed of a mixture of related docile and aggressive individuals, and populations differ in colonies’ characteristic docile:aggressive ratios. Using experimentally-constructed colonies of known composition, we demonstrate that population-level divergence in docile:aggressive ratios is driven by site-specific...

Data from: Cross-scale interactions and the distribution-abundance relationship

Earl E. Werner, Christopher Davis, David K. Skelly, Rick A. Relyea, Michael F. Benard, Shannon J. McCauley & Christopher J. Davis
Positive interspecific relationships between local abundance and extent of regional distribution are among the most ubiquitous patterns in ecology. Although multiple hypotheses have been proposed, the mechanisms underlying distribution-abundance (d-a) relationships remain poorly understood. We examined the intra- and interspecific distribution-abundance relationships for a metacommunity of 13 amphibian species sampled for 15 consecutive years. Mean density of larvae in occupied ponds was positively related to number of ponds occupied by species; employing the fraction of...

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