258 Works

Data from: The distribution and numbers of cheetah (Acinonyx jubatus) in southern Africa

Florian J. Weise, Varsha Vijay, Andrew P. Jacobson, Rebecca F. Schoonover, Rosemary J. Groom, Jane Horgan, Derek Keeping, Rebecca Klein, Kelly Marnewick, Glyn Maude, Jorg Melzheimer, Gus Mills, Vincent Van Der Merwe, Esther Van Der Meer, Rudie J. Van Vuuren, Bettina Wacher, Stuart L. Pimm & Bettina Wachter
Assessing the numbers and distribution of threatened species is a central challenge in conservation, often made difficult because the species of concern are rare and elusive. For some predators, this may be compounded by their being sparsely distributed over large areas. Such is the case with the cheetah Acinonyx jubatus. The IUCN Red List process solicits comments, is democratic, transparent, widely-used, and has recently assessed the species. Here, we present additional methods to that process...

Data from: Internet blogs, polar bears, and climate-change denial by proxy

Jeffrey A. Harvey, Daphne Van Den Berg, Jacintha Ellers, Remko Kampen, Thomas W. Crowther, Peter Roessingh, Bart Verheggen, Rascha J. M. Nuijten, Eric Post, Stephan Lewandowsky, Ian Stirling, Meena Balgopal, Steven C. Amstrup & Michael E. Mann
Increasing surface temperatures, Arctic sea-ice loss, and other evidence of anthropogenic global warming (AGW) are acknowledged by every major scientific organization in the world. However, there is a wide gap between this broad scientific consensus and public opinion. Internet blogs have strongly contributed to this consensus gap by fomenting misunderstandings of AGW causes and consequences. Polar bears (Ursus maritimus) have become a “poster species” for AGW, making them a target of those denying AGW evidence....

Data from: Soil biotic quality lacks spatial structure and is positively associated with fertility in a northern grassland

Pierre-Luc Chagnon, Charlotte Brown, Gisela C. Stotz & James F. Cahill
When placing roots in the soil, plants integrate information about soil nutrients, plant neighbours and beneficial/detrimental soil organisms. While the fine-scale spatial heterogeneity in soil nutrients and plant neighbours have been described previously, virtually nothing is known about the spatial structure in soil biotic quality (measured here as a soil Biota-Induced plant Growth Response, or BIGR), or its correlation with nutrients or neighbours. Such correlations could imply trade-offs in root placement decisions. Theory would predict...

Data from: Fine-scale forest variability and biodiversity in the boreal mixedwood forest

Jaime Pinzon, Linhao Wu, Fangliang He & John R. Spence
Local spatial variation in species distributions is driven by a mix of abiotic and biotic factors, and understanding such hierarchical variation is important for conservation of biodiversity across larger scales. We sought to understand how variation in species composition of understory vascular plants, spiders, and carabid beetles is associated with concomitant spatial variation in forest structure on a 1-ha permanent plot in a never-cut mixedwood forest in central Alberta (Canada). Using correlations among dendrograms produced...

Data from: Checkerboard score-area relationships reveal spatial scales of plant community structure

Gordon G. McNickle, Eric G. Lamb, Mike Lavender, , Brandon S. Schamp, Steven D. Siciliano, Richard Condit, Stephen P. Hubbell, Jennifer L. Baltzer & James F Cahill
Identifying the spatial scale at which particular mechanisms influence plant community assembly is crucial to understanding the mechanisms structuring communities. It has long been recognized that many elements of community structure are sensitive to area; however the majority of studies examining patterns of community structure use a single relatively small sampling area. As different assembly mechanisms likely cause patterns at different scales we investigate how plant species co-occurrence patterns change with sampling unit scale. We...

Data from: Density-dependent signaling: an alternative hypothesis on the function of chemical signaling in a non-territorial solitary carnivore

Clayton T. Lamb, Garth Mowat, Sophie L. Gilbert, Bruce N. McLellan, Scott E. Nielsen & Stan Boutin
Brown bears are known to use rubbing behavior as a means of chemical communication, but the function of this signaling is unclear. One hypothesis that has gained support is that male bears rub to communicate dominance to other males. We tested the communication of dominance hypothesis in a low-density brown bear population in southeast British Columbia. We contrasted rubbing rates for male and female bears during and after the breeding season using ten years of...

Assisted colonization of a regionally native predator impacts benthic invertebrates in fishless mountain lakes

Allison L. K. Banting, Mark K. Taylor, Rolf D. Vinebrooke, Chris M. Carli, Mark S. Poesch & Rolf D. Vinebrooke
The intentional introduction of native cold-water trout into high-elevation fishless lakes has been considered a tool to build resilience to climate change (i.e. assisted colonization); however, ecological impacts on recipient communities are understudied. The purpose of this study was to inform native cold-water trout recovery managers by assessing potential consequences of translocating a regionally native trout (westslope cutthroat trout; Oncorhynchus clarkii) into fishless mountain lakes. This study compared littoral benthic invertebrate richness, diversity, community structure,...

Traditional land use, management and biodiversity of European semi-natural grasslands – Editorial to the 15th EDGG Special Feature

Steffen Boch, Thomas Becker, Balázs Deák, Jürgen Dengler & Viktoria Wagner
Seit 15 Jahren geben Mitglieder der Eurasian Dry Grassland Group (EDGG) und deren Vorgänger-organisationen Grasland-Sonderausgaben (Special Features) in Tuexeniaheraus. Das diesjährige Special Feature mit dem Titel Traditionelle Landnutzung, Management und Biodiversität von halb-natürlichem Grasland in Europa umfasst acht Artikel, die viele Aspekte der Graslandforschung beleuchten und verschiedene Organismengruppen miteinbeziehen: JANIŠOVÁ et al. (2020a) untersuch-ten den Einfluss verschiedener traditioneller Landnutzungsformen auf den Artenreichtum des extensi-ven Graslands im Apuseni-Gebirge in Westrumänien. LABADESSA et al.(2020) verglichen die Arten-zusammensetzung...

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