Germination timing has a strong influence on direct seeding efforts, and therefore is a closely tracked demographic stage in a wide variety of wildland and agricultural settings. Predictive seed germination models, based on soil moisture and temperature data in the seed zone are an efficient method of estimating germination timing. We utilized Visual Basic for Applications (VBA) to create Auto-Germ, which is an Excel workbook that allows a user to estimate field germination timing based...
Data from: Hybridization could be a common phenomenon within the highly diverse lizard genus LiolaemusMelisa Olave, Luciano J. Avila, , Mariana Morando & Jack W. Sites
Hybridization is likely to occur more often between closely related taxa that have had insufficient time to diverge to the point of reproductive incompatibility; hybridization between deeply divergent lineages is rare. In squamate reptiles, hybridization has been proposed as a possible explanation for the extensive paraphyly observed in mitochondrial gene trees in several species complexes of the South American lizard genus Liolaemus. One of the best-documented cases is within the L. boulengeri and L. rothi...
Data from: Testes mass in the livebearing fish Brachyrhaphis rhabdophora (Poeciliidae) varies hypoallometrically with body size but not between predation environmentsHaley N. Brown, Brittany Herrod Gale, Jerald B. Johnson & Mark C. Belk
In this study, we considered potential causes of variation in testis size in the livebearing fish Brachyrhaphis rhabdophora. We evaluated variation in testes mass among individual males and among populations that occupy different selective environments. First, we predicted that small males should allocate more to testes mass than large males (i.e., hypoallometric pattern) based on a sperm competition argument. Second, based on life history theory and associated differences in mortality rates between populations that co-exist...
Data from: Reproductive skipping as an optimal life history strategy in the southern elephant seal, Mirounga leoninaBlaine D. Griffen
Intermittent breeding by which organisms skip some current reproductive opportunities in order to enhance future reproductive success is a common life history tradeoff among long-lived, iteroparous species. The southern elephant seal Mirounga leonina engages in intermediate breeding when body condition is low. While it is anticipated that this strategy may increase the lifetime reproductive output of this species, the conditions under which reproductive skipping are predicted to occur are not clear. Here I develop a...
Atmospheric CO2 enrichment usually increases aboveground productivity (ANPP) of grassland vegetation, but the magnitude of the ANPP-CO2 response differs among ecosystems. Soil properties affect ANPP via multiple mechanisms and vary over topographic to geographic gradients, but have received little attention as potential modifiers of the ANPP-CO2 response. We assessed effects of three soil types, sandy loam, silty clay, and clay, on the ANPP response of perennial C3/C4 grassland communities to a subambient to elevated CO2...
Data from: Ecological and evolutionary implications of allometric growth in stomach size of brachyuran crabsBlaine D. Griffen, Zachary J. Cannizzo & Mustafa R. Gul
Individual characteristics often scale allometrically with organismal body size and the form of this scaling can be influenced by ecological and evolutionary factors. Examining the specific form of this scaling can therefore yield important insights into organismal ecology and evolution and the ability of organisms to respond to future environmental changes. We examine the allometric scaling of stomach volume with body mass for 17 species of brachyuran crabs. We also examine how this scaling is...
This study investigated the phylogenetic relationships among seven burrowing mayfly families. Genetic data from four ribosomal DNA genes (12S, 16S, 18S, and 28S) generated with sanger sequencing, 448 protein coding loci generated using a novel hybrid enrichment probe set and available RNAseq and genome assembly for 19 ingroup taxa and 4 outgroup taxa. Maximum Likelihood, and Bayesian analyses were carried out to estimate phylogenetic relationships. The results indicated that Potamanthidae, Euthyplociidae, Behningiidae, and Palingeniidae were...
Brigham Young University7
The University of Texas at Austin1
University of North Florida1
United States Department of Agriculture1
University of San Francisco1
University of South Carolina1
Agricultural Research Service1
Utah Valley University1
National Scientific and Technical Research Council1