8 Works

Data from: Camouflaged or tanned: plasticity in freshwater snail pigmentation

Johan Ahlgren, Xi Yang, Lars-Anders Hansson, Christer Brőnmark & L.-A. Hansson
By having phenotypically plastic traits, such as morphology, behaviour and life history, many organisms optimise their fitness in response to fluctuating threats. Freshwater snails with translucent shells, e.g. snails from the Radix genus, differ considerably in their mantle pigmentation patterns, with snails from the same water body ranging from completely dark pigmented to only a few dark patterns. These pigmentation differences have previously been suggested to be genetically fixed, but we suggest that this polymorphism...

Data from: Y chromosome haplotype distribution of brown bears (Ursus arctos) in Northern Europe provides insight into population history and recovery (Ursus arctos)

Julia Schregel, Hans Geir Eiken, Finn Audun Grøndahl, Frank Hailer, Jouni Aspi, Ilpo Kojola, Konstantin Tirronen, Pjotr Danilov, Alexander Rykov, Eugene Poroshin, Axel Janke, Jon E. Swenson, Snorre B. Hagen & Piotr Danilov
High-resolution, male-inherited Y-chromosomal markers are a useful tool for population genetic analyses of wildlife species, but to date have only been applied in this context to relatively few species besides humans. Using nine Y-chromosomal STR and three Y-chromosomal single nucleotide polymorphism markers (Y-SNPs), we studied whether male gene flow was important for the recent recovery of the brown bear (Ursus arctos) in Northern Europe, where the species declined dramatically in numbers and geographic distribution during...

Data from: Phylogeny suggests non-directional and isometric evolution of sexual size dimorphism in argiopine spiders

Ren-Chung Cheng & Matjaž Kuntner
Sexual dimorphism describes substantial differences between male and female phenotypes. In spiders, sexual dimorphism research almost exclusively focuses on size, and recent studies have recovered steady evolutionary size increases in females, and independent evolutionary size changes in males. Their discordance is due to negative allometric size patterns caused by different selection pressures on male and female size (converse Rensch's rule). Here, we investigated macroevolutionary patterns of sexual size dimorphism (SSD) in Argiopinae, a global lineage...

Data from: Multimodal cues improve prey localization under complex environmental conditions

Flor Rhebergen, Ryan C. Taylor, Michael J. Ryan, Rachel A. Page & Wouter Halfwerk
Predators often eavesdrop on sexual displays of their prey. These displays can provide multimodal cues that aid predators, but the benefits in attending to them should depend on the environmental sensory conditions under which they forage. We assessed whether bats hunting for frogs use multimodal cues to locate their prey and whether their use varies with ambient conditions. We used a robotic set-up mimicking the sexual display of a male túngara frog (Physalaemus pustulosus) to...

Data from: Individual boldness is linked with protective shell shape in aquatic snails

Johan Ahlgren, Ben B. Chapman, P. Anders Nilsson, Christer Brönmark & C. Bronmark
The existence of consistent individual differences in behaviour (‘animal personality’) has been well documented in recent years. However, how such individual variation in behaviour is maintained over evolutionary time is an ongoing conundrum. A well-studied axis of animal personality is individual variation along a bold–shy continuum, where individuals differ consistently in their propensity to take risks. A predation-risk cost to boldness is often assumed, but also that the reproductive benefits associated with boldness lead to...

Data from: Stronger effect of gastropods than rodents on seedling establishment, irrespective of exotic or native plant species origin

Lotte Korell, Claudia Stein, Isabell Hensen, Helge Bruelheide, Katharine N. Suding & Harald Auge
Experimental evidence about how generalist consumers affect exotic plant invasions is equivocal, but most tests have been limited to few plant species, single herbivore guilds, and single locations. Using a seed-addition experiment, we studied effects of gastropods and rodents on recruitment success of 37 exotic and 37 native plant species affiliated to three different functional groups (i.e. grasses, legumes and non-legume herbs). We replicated our seed addition x herbivore exclusion experiment at multiple grassland sites,...

Data from: DNA barcoding gap: reliable species identification over morphological and geographical scales

Klemen Čandek & Matjaž Kuntner
The philosophical basis, and utility of DNA barcoding has been a subject of numerous debates. While most literature embraces it, some studies continue to question its use in dipterans, butterflies, and marine gastropods. Here, we explore the utility of DNA barcoding in identifying spider species that vary in taxonomic affiliation, morphological diagnosibility and geographic distribution. Our first test searched for a “barcoding gap” by comparing intra- and interspecific means, medians and overlap in more than...

Data from: Ecosystem nitrogen retention is regulated by plant community trait interactions with nutrient status in an alpine meadow

Fangping Wang, Guoxi Shi, Ostle Nicholas, Buqing Yao, Mingfei Ji, Wenying Wang, Zhen Ma, Huakun Zhou & Xinquan Zhao
1.Biotic nitrogen (N) retention is an important ecosystem function in the context of ongoing land use intensification, N deposition and global warming. However, a paucity of experimental evidence limits understanding of how different plant community components influence N retention in terrestrial ecosystems. 2.In this investigation we conducted a 15N labelling experiment to test how plant community properties, including plant species richness/diversity, dominance and functional traits, influence plant N uptake and retention under different nutrient availabilities....

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