Data from: Tree ring δ15N as validation of space-for-time substitution in disturbance studies of forest nitrogen statusJ. Marty Kranabetter & Justin A. Meeds
Forest ecosystem nitrogen (N) response to disturbance has often been examined by space-for-time substitution, but there are few objective tests of the possible variation in disturbance type and intensity across chronosequence sites. We hypothesized that tree ring δ15N, as a record of ecosystem N status, could validate chronosequence assumptions and provide isotopic evidence to corroborate N trends. To test this we measured soil N availability, soil δ15N, and foliar N attributes of overstory Douglas-fir (Pseudotsuga...
Data from: Generality of toxins in defensive symbiosis: ribosome-inactivating proteins and defense against parasitic wasps in DrosophilaMatthew J. Ballinger & Steve J. Perlman
While it has become increasingly clear that multicellular organisms often harbor microbial symbionts that protect their hosts against natural enemies, the mechanistic underpinnings underlying most defensive symbioses are largely unknown. Spiroplasma bacteria are widespread associates of terrestrial arthropods, and include strains that protect diverse Drosophila flies against parasitic wasps and nematodes. Recent work implicated a ribosome-inactivating protein (RIP) encoded by Spiroplasma, and related to Shiga-like toxins in enterohemorrhagic Escherichia coli, in defense against a virulent...
Data from: Expert, crowd, students or algorithm: who holds the key to deep-sea imagery ‘big data’ processing?Marjolaine Matabos, Maia Hoeberechts, Carol Doya, Jacopo Aguzzi, Jessica Nephin, Tom E. Reimchen, Steve Leaver, Roswitha M. Marx, Alexandra Branzan Albu, Ryan Fier, Ulla Fernandez-Arcaya, S. Kim Juniper & Thomas E. Reimchen
1. Recent technological development has increased our capacity to study the deep sea and the marine benthic realm, particularly with the development of multidisciplinary seafloor observatories. Since 2006, Ocean Networks Canada cabled observatories, has acquired nearly 65 TB and over 90,000 hours of video data from seafloor cameras and Remotely Operated Vehicles (ROVs). Manual processing of these data is time-consuming and highly labour-intensive, and cannot be comprehensively undertaken by individual researchers. These videos contain valuable...
Data from: Gonadotropin-releasing hormone receptor (Gnrhr) gene knock out: normal growth and development of sensory, motor and spatial orientation behavior but altered metabolism in neonatal and prepubertal miceEllen R. Busby & Nancy M. Sherwood
Gonadotropin-releasing hormone (GnRH) is important in the control of reproduction, but its actions in non-reproductive processes are less well known. In this study we examined the effect of disrupting the GnRH receptor in mice to determine if growth, metabolism or behaviors that are not associated with reproduction were affected. To minimize the effects of other hormones such as FSH, LH and sex steroids, the neonatal-prepubertal period of 2 to 28 days of age was selected....
Sharks are a diverse group of mobile predators that forage across varied spatial scales and have the potential to influence food web dynamics. The ecological consequences of recent declines in shark biomass may extend across broader geographic ranges if shark taxa display common behavioural traits. By tracking the original site of photosynthetic fixation of carbon atoms that were ultimately assimilated into muscle tissues of 5,394 sharks from 114 species, we identify globally consistent biogeographic traits...
Data from: Bony traits and genetics drive intraspecific variation in vertebrate elemental compositionDaniel J. Durston & Rana W. El-Sabaawi
Interspecific variation in elemental composition is well known and often leads to predictable differences in ecosystem interactions, but little is known about the extent, causes and importance of intraspecific variation in elemental composition. If intraspecific variation is substantial and has a genetic basis, it may underlie an important mechanism of evolutionary interplay with ecology as individuals compensate for evolutionary changes in elemental demand. To investigate the extent and causes of intraspecific elemental variation in vertebrates,...
Data from: Climate change leads to increasing population density and impacts of a key island invaderGreg T.W. McClelland, Res Altwegg, Rudi J. Van Aarde, Sam Ferreira, Alan E. Burger, Steven L. Chown & Gregory T. W. McClelland
The considerable threats of invasive rodents to island biodiversity are likely to be compounded by climate change. Forecasts for such interactions have been most pronounced for the Southern Ocean islands where ameliorating conditions are expected to decrease thermal and resource restrictions on rodents. Firm evidence for changing rodent populations in response to climate change, and demonstrations of associated impacts on the terrestrial environment, are nonetheless entirely absent for the region. Using data collected over three...
Data from: Ecological legacies of anthropogenic burning in a British Columbia coastal temperate rain forestKira M. Hoffman, Ken P. Lertzman & Brian M. Starzomski
Aim Few long-term fire histories have been reconstructed in coastal temperate rain forests, and little is known regarding the spatial and temporal characteristics of lightning and human ignitions. We use a multidisciplinary approach to assess the impact, scale and ecological legacies of historic fires. Location We focus on perhumid temperate rain forests located on the central coast of British Columbia, Canada. Methods We reconstructed 700 years of temporal and spatial aspects of fire activity with...
University of Victoria8
Simon Fraser University2
National Oceanography Centre1
University of Newcastle Australia1
Spanish Institute of Oceanography1
Cape Eleuthera Institute1
University of Pretoria1
Great Barrier Reef Marine Park Authority1
Centre d'Etudes Biologiques de Chizé1