Scott P. Egan
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View article: Warming Increases Environmental <scp>DNA</scp> (<scp>eDNA</scp>) Removal Rates in Flowing Waters
Warming Increases Environmental <span>DNA</span> (<span>eDNA</span>) Removal Rates in Flowing Waters Open
The use of environmental DNA (eDNA) for aquatic conservation is emerging, but its value is limited by our understanding of how environmental factors like temperature impact eDNA persistence. Although elevated temperatures are known to incr…
Comparing the Fate of <span>eDNA</span> by Particle Sizes and Molecule Lengths in Recirculating Streams Open
The detection of environmental DNA (eDNA) has revolutionized aquatic species monitoring, yet interpreting eDNA data remains challenging due to gaps in our understanding of eDNA ecology (i.e., origin, state, transport, and fate) and variabi…
Measuring the Strength of Spatial Sorting Open
Empirical work suggests that spatial sorting, a mechanism of evolutionary change fueled by spatial assortment of phenotypes, may lead to phenotypic shifts on ecological timescales. However, we currently lack theoretical tools to measure th…
Diversity of Diptera and their parasitoids associated with Inga vera Willd. (1806) (Fabaceae) with new host record in Minas Gerais, Brazil Open
Diptera belonging to four different families, as well as four associated parasitoids were reared from fruits of Inga vera Willd. (Fabaceae) in Lavras, Minas Gerais, southeast Brazil. We collected 450 fruits from five trees of I. vera betwe…
The role of divergent host use and geography in the evolution of habitat isolation and sexual isolation among sister species of <i>Belonocnema</i> gall wasps Open
Ecology and geography can play important roles in the evolution of reproductive isolation across the speciation continuum, but few studies address both at the later stages of speciation. This notable gap in knowledge arises from the fact t…
Mark–recapture surveys affect nest site fidelity but not reproductive timing of male Smallmouth Bass Open
Objective Fish population surveys in north-temperate lakes are often conducted in the fall or spring when individuals are easy to capture with traditional fisheries techniques. Because some fishes are preparing to spawn or are spawning dur…
A test of trade-offs in dispersal and reproduction within and between a sister species pair of specialist insect herbivores Open
A critical question in understanding the origin of trade-offs and their impact on trait evolution is whether trade-offs between species originate from within-species variation. Despite their importance, studies linking interspecific diverg…
Impact of a natural disturbance on the performance and microbial communities in a full-scale constructed wetland for industrial wastewater treatment Open
Constructed Wetlands (CWs) are a cost-effective, versatile and sustainable choice for wastewater treatment. In these environments, microbial communities play a significant role in pollutant removal. However, little is known about how micro…
Environment and shipping drive environmental <span>DNA</span> beta‐diversity among commercial ports Open
The spread of nonindigenous species by shipping is a large and growing global problem that harms coastal ecosystems and economies and may blur coastal biogeographical patterns. This study coupled eukaryotic environmental DNA (eDNA) metabar…
Particle size influences decay rates of environmental DNA in aquatic systems Open
Environmental DNA (eDNA) analysis is a powerful tool for remote detection of target organisms. However, obtaining quantitative and longitudinal information from eDNA data is challenging, requiring a deep understanding of eDNA ecology. Nota…
A genomic test of subspecies in the <i>Eunota togata</i> species group (Coleoptera: Cicindelidae): Morphology masks evolutionary relationships and taxonomy Open
Most of the world’s biodiversity is described primarily or exclusively using morphological traits that may not always reflect the true evolutionary units. Accurate taxonomy is critical for conservation efforts and re-evaluation of traditio…
Speciation in Nearctic oak gall wasps is frequently correlated with changes in host plant, host organ, or both Open
Quantifying the frequency of shifts to new host plants within diverse clades of specialist herbivorous insects is critically important to understand whether and how host shifts contribute to the origin of species. Oak gall wasps (Hymenopte…
Delimiting the cryptic diversity and host preferences of <i>Sycophila</i> parasitoid wasps associated with oak galls using phylogenomic data Open
Cryptic species diversity is a major challenge regarding the species‐rich community of parasitoids attacking oak gall wasps due to a high degree of sexual dimorphism, morphological plasticity, small size and poorly known biology. As such, …
The arthropod associates of 155 North American cynipid oak galls Open
The identities of most arthropod associates of cynipid-induced oak galls in the western Palearctic are generally known. However, a comprehensive accounting of associates has been performed for only a small number of the galls induced by th…
Speciation in Nearctic oak gall wasps is frequently correlated with changes in host plant, host organ, or both Open
Quantifying the frequency of shifts to new host plants within diverse clades of specialist herbivorous insects is critically important to understand whether and how host shifts contribute to the origin of species. Oak gall wasps (Hymenopte…
Delimiting the cryptic diversity and host preferences of <i>Sycophila</i> parasitoid wasps associated with oak galls using phylogenomic data Open
Cryptic species diversity is a major challenge for the species-rich community of parasitoids attacking oak gall wasps due to a high degree of sexual dimorphism, morphological plasticity, small size, and poorly known biology. As such, we kn…
The role of ecology and geography in the evolution of habitat isolation and sexual isolation among sister species of host-plant-specific insects Open
While ecology and geography can play important roles in the evolution of reproductive isolation across the speciation continuum, the few studies to date examining their relative contributions have largely focused on the early stages of spe…
Describing biodiversity in the genomics era: A new species of Nearctic Cynipidae gall wasp and its genome Open
Gall wasps (Hymenoptera: Cynipidae) specializing on live oaks in the genus Quercus (subsection Virentes ) are a relatively diverse and well‐studied community with 14 species described to date, albeit with incomplete information on their bi…
<i>Ormyrus labotus</i> (Hymenoptera: Ormyridae): Another Generalist That Should not be a Generalist is not a Generalist Open
Several recent reappraisals of supposed generalist parasite species have revealed hidden complexes of species, each with considerably narrower host ranges. Parasitic wasps that attack gall-forming insects on plants have life history strate…
The Arthropod Associates of 155 North American Cynipid Oak Galls. Open
The identities of most arthropod associates of cynipid-induced oak galls in the western Palearctic are generally known. However, a comprehensive accounting of associates has been performed for only a small number of the galls induced by th…
<i>Ormyrus labotus</i> Walker (Hymenoptera: Ormyridae): another generalist that should not be a generalist is not a generalist Open
Several recent reappraisals of supposed generalist parasite species have revealed hidden complexes of species, each with considerably narrower host ranges. Parasitic wasps that attack gall-forming insects on plants have life history strate…
Global port survey quantifies commercial shipping’s effect on biodiversity Open
Spread of nonindigenous organisms by shipping is one of the largest threats to coastal ecosystems. Limited monitoring and understanding of this phenomenon currently hinder development of effective prevention policies. Surveying ports in No…
View article: Diversity Metrics Are Robust to Differences in Sampling Location and Depth for Environmental DNA of Plants in Small Temperate Lakes
Diversity Metrics Are Robust to Differences in Sampling Location and Depth for Environmental DNA of Plants in Small Temperate Lakes Open
Environmental DNA (eDNA) analysis methods permit broad yet detailed biodiversity sampling to be performed with minimal field effort. However, considerable uncertainty remains regarding the spatial resolution necessary for effective samplin…
Context-Dependent Reproductive Isolation: Host Plant Variability Drives Fitness of Hybrid Herbivores Open
The role of divergent selection between alternative environments is well-recognized to promote reproductive isolation (RI) between lineages. However, most studies view each divergent environment as homogenous, thereby overlooking the poten…
Is energetics or competition a stronger driver of male smallmouth bass seasonal reproductive timing? Open
Intraspecific competitive ability is often associated with body size and has been shown to influence reproductive timing in many species. However, energetic constraints provide an alternative explanation for size-related differences of rep…
One hundred and sixty years of taxonomic confusion resolved:<i>Belonocnema</i>(Hymenoptera: Cynipidae: Cynipini) gall wasps associated with live oaks in the USA Open
Gall wasps (Hymenoptera: Cynipidae) in the genus Belonocnema induce galls on live oaks (Quercus series Virentes), forming multilocular root galls in the sexual generation and unilocular leaf galls in the asexual generation. Using morpholog…
Asymmetric, but opposing reductions in immigrant viability and fecundity promote reproductive isolation among host‐associated populations of an insect herbivore Open
Immigrant inviability can contribute to reproductive isolation (RI) during ecological speciation by reducing the survival of immigrants in non-native environments. However, studies that assess the fitness consequence of immigrants moving f…