Landscape corridors mitigate the negative effects of habitat fragmentation by increasing dispersal. Corridors also increase biodiversity in connected habitat fragments, suggestive of metacommunity dynamics. What is unknown in this case is the mechanisms through which metacommunity dynamics act. Working in a large-scale fragmentation experiment, we tested the effect of corridors on the movement of prey species and subsequent effects on predator nutrition (which we call trophic subsidies). We enriched plants of central patches with 15N,...
Data from: Tracking dragons: stable isotopes reveal the annual cycle of a long-distance migratory insectMichael T. Hallworth, Peter P. Marra, Kent P. McFarland, Sara Zahendra & Colin E. Studds
Insect migration is globally ubiquitous and can involve continental-scale movements and complex life-histories. Apart from select species of migratory moths and butterflies, little is known about the structure of the annual cycle for migratory insects. Using stable-hydrogen isotope analysis of 852 wing samples from eight countries spanning 140 years, combined with 21 years of citizen science data, we determined the full annual cycle of a large migratory dragonfly, the common green darner (Anax junius). We...
Secondary forests are increasingly recognized for conserving biodiversity and mitigating global climate change, but these and other desired outcomes can only be achieved after decades of regeneration, and secondary forests are frequently recleared before they recover to predisturbance conditions. We used a time series of aerial photographs (1947-2014) to evaluate multidecadal persistence of secondary forests across a 320 sq. km landscape in southern Costa Rica. Secondary forests had relatively short lifespans, with 50% recleared within...
Data from: Cracking the case: seed traits and phylogeny predict time to germination in prairie restoration speciesRebecca S. Barak, Taran M. Lichtenberger, Alyssa Wellman-Houde, Andrea T. Kramer & Daniel J. Larkin
1. Traits are important for understanding how plant communities assemble and function, providing a common currency for studying ecological processes across species, locations, and habitat types. However, most studies relating species traits to community assembly rely upon vegetative traits of mature plants. Seed traits, which are understudied relative to whole-plant traits, are key to understanding assembly of plant communities. This is particularly true in restored communities, which are typically started from seed, making germination a...
Background: Lateral gene transfer (LGT), also known as horizontal gene transfer, into multicellular eukaryotes with differentiated tissues, particularly gonads, continues to be met with skepticism by many prominent evolutionary and genomic biologists. A detailed examination of 26 animal genomes identified putative LGTs in invertebrate and vertebrate genomes, concluding that there are fewer predicted LGTs in vertebrates/chordates than invertebrates, but there is still evidence of LGT into chordates, including humans. More recently, a reanalysis of a...
Objective: In this secondary analysis of the GAMES-RP trial, we report the effect of IV glyburide on adjudicated, edema-related endpoints. Methods: Blinded adjudicators assigned designations for hemorrhagic transformation, neurological deterioration, malignant edema and edema-related death to patients from the GAMES-RP Phase II randomized controlled trial of IV glyburide for large hemispheric infarct. Rates of these endpoints were compared between treatment arms in the per-protocol sample. In those participants with malignant edema, the effects of treatment...
University of Maryland, Baltimore County6
Massachusetts General Hospital1
Oregon Health & Science University1
Medical University of South Carolina1
University of Minnesota1
University of Pittsburgh1
University of Hawaii at Manoa1
Washington University in St. Louis1
University of Calgary1
Brigham and Women's Hospital1