18 Works

Site-specific impacts of a major hurricane on alpha and beta diversity in tropical forest seedling communities

Samantha Worthy, Vanessa Rubio, Kirstin Staiger, Boris Ngouajio, Jie Yang & Nathan Swenson
Large scale disturbances are known to impact the alpha and beta diversity of communities. However, whether these disturbances increase or decrease diversity is often debated. The goal of this study was to quantify how the diversity of the seedling community was impacted within and across elevation in the El Yunque forest of Puerto Rico following a major hurricane. We tested two alternative hypotheses, that hurricanes are relatively more homogenizing or non-homogenizing forces, by quantifying changes...

Reproducible determination of dissolved organic matter photosensitivity: Data and code

Alec Armstrong
This dataset includes absorbance and fluourescence spectra used to compare the sensitivity of dissolved organic matter to experimental photodegradation. Spectra represent time series of measurements collected during 20-hour lab photodegradations. Nearly all experiments consisted of 60 absorbance and fluorescence measurements collected every 20 minutes as samples were exposed to simulated sunlight. A subset of these data were used to fit a parallel factor analysis (PARAFAC) model, onto which the entire data set was projected. Each...

Data for: Theoretical and practical considerations when using retroelement insertions to estimate species trees in the anomaly zone

Erin Molloy, John Gatesy & Mark Springer
A potential shortcoming of concatenation methods for species tree estimation is their failure to account for incomplete lineage sorting. Coalescent methods address this problem but make various assumptions that, if violated, can result in worse performance than concatenation. Given the challenges of analyzing DNA sequences with both concatenation and coalescent methods, retroelement insertions (RIs) have emerged as powerful phylogenomic markers for species tree estimation. Here, we show that two recently proposed quartet-based methods, SDPquartets and...

On the social and cognitive dimensions of wicked environmental problems characterized by conceptual and solution uncertainty

Felber J. Arroyave B., Oscar Yandy Romero Goyeneche, Meredith Gore, Gaston Heimeriks, Jeffrey Jenkins & Alexander M. Petersen
We develop a quantitative framework for understanding the class of wicked problems that emerge at the intersections of “natural”, social, and technological complex systems. Wicked problems reflect our incomplete understanding of interdependent global systems and the systemic risk they pose; such problems escape solutions because they are often ill-defined, and thus misidentified and under-appreciated by communities of problem-solvers. While there are well-documented benefits to tackling boundary-crossing problems from various viewpoints, the integration of diverse approaches...

Differential effects of nematode infection on pollinating and non-pollinating fig wasps: can shared antagonism provide net benefits to a mutualism?

Justin Van Goor, Finn Piatscheck, Derek Houston & John Nason
1. Species pairs that form mutualistic associations are also components of broader organismal community networks. These network-level associations have shaped the evolution of individual mutualisms through interspecific interactions ranging from secondarily mutualistic to intensely antagonistic. Our understanding of this complex context remains limited because characterizing the impacts of species interacting with focal mutualists is often difficult. How is the fitness of mutualists impacted by the co-occurring interactive network of community associates? 2. We investigate this...

Supporting data for ‘DFENS: Diffusion chronometry using Finite Elements and Nested Sampling’

Euan Mutch, John Maclennan, Oliver Shorttle, John Rudge & David Neave
This is supporting data for the manuscript entitled 'DFENS: Diffusion chronometry using Finite Elements and Nested Sampling' by E. J. F. Mutch, J. Maclennan, O. Shorttle, J. F. Rudge and D. Neave. Preprint here: https://doi.org/10.1002/essoar.10503709.1 Data Set S1. ds01.csv Electron probe microanalysis (EPMA) profile data of olivine crystals used in this study. Standard deviations are averaged values of standard deviations from counting statistics and repeat measurements of secondary standards. Data Set S2. ds02.csv Plagioclase compositional...

Bipartite network datasets for Permian host-plant--insect herbivory

Anshuman Swain, S. Augusta Maccracken, William Fagan & Conrad Labandeira
Plant–insect associations have been a significant component of terrestrial ecology for over 400 million years. Exploring these interactions in the fossil record, through novel perspectives, provides a window into understanding evolutionary and ecological forces that shaped these interactions. For the past several decades, researchers have documented, described and categorized fossil evidence of these interactions. Drawing on powerful tools from network science, we propose here a bipartite network representation of fossilized plants and their herbivore-induced leaf...

Cucurbit[7]uril–Tetramethylrhodamine Conjugate for Direct Sensing and Cellular Imaging

Andrew T. Bockus, Lauren Smith, Amy G. Grice, Omar A. Ali, Carolyn C. Young, William Mobley, Ashley Leek, James L. Roberts, Brittany Vinciguerra, Lyle Isaacs & Adam Urbach
This paper describes the design and synthesis of a conjugate (Q7R) comprising the synthetic host cucurbit[7]uril (Q7) linked to the fluorescent dye tetramethylrhodamine (TMR), and the characterization of its optical and guest-binding properties as well as its cellular uptake. Q7R was synthesized in two steps from monofunctionalized azidobutyl-Q7 and NHS-activated TMR. The fluorescence of Q7R is quenched upon guest binding, and this observable was used to determine equilibrium dissociation constant (Kd) values. Unexpectedly, the Kd...

High Fidelity Kinetic Self-Sorting in Multi-Component Systems Based on Guests with Multiple Binding Epitopes

Lyle Isaacs, Peter Y. Zavalij & Pritam Mukhopadhyay
The molecular recognition platforms of natural systems often possess multiple binding epitopes, each of which has programmed functional consequences. We report the dynamic behavior of a system comprising CB[6], CB[7], and guests cyclohexanediammonium (1) and adamantanealkylammonium (2) that we refer to as a two-faced guest because it contains two distinct binding epitopes. We find that the presence of the two-faced guestjust as is observed for protein targeting in vivodictates the kinetic pathway that the system...

Post-copulatory sexual selection is associated with sperm aggregate quality in Peromyscus mice

Heidi Fisher, Kristin Hook & William David Weber
In some species, sperm form coordinated groups that are hypothesized to improve their swimming performance in competitive contexts or to navigate through the viscous fluids of the female reproductive tract. Here we investigate sperm aggregation across closely-related species of Peromyscus mice that naturally vary by mating system to test the predictions that sperm aggregates (1) are faster than solitary sperm in species that females mate multiply to aid cells in sperm competition, and (2) outperform...

Flowering time advances since the 1970s in a sagebrush steppe community: implications for management and restoration

Trevor Bloom, Donal O'Leary & Corinna Riginos
Climate change is widely known to affect plant phenology, but little is known about how these impacts manifest in the widespread sagebrush ecosystem of the Western US which supports a number of wildlife species of concern. Shifts in plant phenology can trigger consequences for the plants themselves as well as the communities of consumers that depend upon them. We assembled historical observations of first flowering dates for 51 species collected in the 1970 and 80s...

New Ultrahigh Affinity Host−Guest Complexes of Cucurbit[7]uril with Bicyclo[2.2.2]octane and Adamantane Guests: Thermodynamic Analysis and Evaluation of M2 Affinity Calculations

Sarvin Moghaddam, Cheng Yang, Mikhail Rekharsky, Young Ho Ko, Kimoon Kim, Yoshihisa Inoue & Michael K. Gilson
A dicationic ferrocene derivative has previously been shown to bind cucurbit[7]uril (CB[7]) in water with ultrahigh affinity (ΔGo = −21 kcal/mol). Here, we describe new compounds that bind aqueous CB[7] equally well, validating our prior suggestion that they, too, would be ultrahigh affinity CB[7] guests. The present guests, which are based upon either a bicyclo[2.2.2]octane or adamantane core, have no metal atoms, so these results also confirm that the remarkably high affinities of the ferrocene-based...

The Cucurbit[n]uril Family:  Prime Components for Self-Sorting Systems

Simin Liu, Christian Ruspic, Pritam Mukhopadhyay, Sriparna Chakrabarti, Peter Y. Zavalij & Lyle Isaacs
We determined the values of Ka for a wide range of host−guest complexes of cucurbit[n]uril (CB[n]), where n = 6−8, using 1H NMR competition experiments referenced to absolute binding constants measured by UV/vis titration. We find that the larger homologuesCB[7] and CB[8]individually maintain the size, shape, and functional group selectivity that typifies the recognition behavior of CB[6]. The cavity of CB[7] is found to effectively host trimethylsilyl groups. Remarkably, the values of Ka for the...

Data from: Estimating encounter location distributions from animal tracking data

Michael Noonan, Ricardo Martinez-Garcia, Grace H. Davis, Margaret C. Crofoot, Roland Kays, Ben T. Hirsch, Damien Caillaud, Eric Payne, Andrew Sih, David L. Sinn, Orr Spiegel, William F. Fagan, Christen H. Fleming & Justin M. Calabrese
1. Ecologists have long been interested in linking individual behavior with higher-level processes. For motile species, this 'upscaling' is governed by how well any given movement strategy maximizes encounters with positive factors, and minimizes encounters with negative factors. Despite the importance of encounter events for a broad range of ecological processes, encounter theory has not kept pace with developments in animal tracking or movement modeling. Furthermore, existing work has focused primarily on the relationship between...

Elevated rates of positive selection drive the evolution of pestiferousness in the Colorado potato beetle ( Leptinotarsa decemlineata, Say)

Zachary Cohen, Kristian Brevik, Yolanda H. Chen, David J. Hawthorne, Benjamin D. Weibel & Sean D. Schoville
In order to understand the evolution of pestiferousness, which we define as the accumulation of traits that contribute to an insect population’s success in an agroecosystem, we tested the importance of known genomic properties associated with rapid adaptation. Within the leaf beetle genus Leptinotarsa, only the Colorado potato beetle (CPB), Leptinotarsa decemlineata Say, and a few populations therein, has risen to pest status on cultivated nightshades, Solanum. Using whole genomes from ten closely related Leptinotarsa...

Spatial and temporal heterogeneity in pollinator communities maintains within-species floral odour variation

Mark A. Szenteczki, Adrienne Godschalx, Andrea Galmán, Anahí Espíndola, Marc Gibernau, Nadir Alvarez & Sergio Rasmann
Flowering plants emit complex bouquets of volatile organic compounds (VOCs) to mediate interactions with their pollinators. These bouquets are undoubtedly influenced by pollinator-mediated selection, particularly in deceptively-pollinated species that rely on chemical mimicry. However, many uncertainties remain regarding how spatially and temporally heterogeneous pollinators affect the diversity and distribution of floral odour variation. Here, we characterized and compared the floral odours of ten populations of deceptively-pollinated Arum maculatum (Araceae), and inter-annual and decadal variation in...

Glycoluril‐Derived Molecular Clips are Potent and Selective Receptors for Cationic Dyes in Water

Nengfang She, Damien Moncelet, Laura Gilberg, Xiaoyong Lu, Vladimir Sindelar, Volker Briken & Lyle Isaacs
Abstract Molecular clip 1 remains monomeric in water and engages in host–guest recognition processes with suitable guests. We report the Ka values for 32 1⋅guest complexes measured by 1H NMR, UV/Vi...

Cucurbit[7]uril as a Supramolecular Artificial Enzyme for Diels-Alder Reactions

Aniello Palma, Markus Artelsmair, Guanglu Wu, Xiaoyong Lu, Steven J. Barrow, Najib Uddin, Edina Rosta, Eric Masson & Oren Scherman
Copycat.: Cucurbit[7]uril (CB[7]) is able to catalyse DielsâAlder reactions for substituted and otherwise unreactive N-allyl-2-furfurylamines, thus imitating the role of a DielsâAlderase enzyme. Desp...

Registration Year

  • 2021

Resource Types

  • Dataset


  • University of Maryland, College Park
  • University of Cambridge
  • Department of Physical and Technical Sciences
  • Japan Science and Technology Agency
  • University of California, Merced
  • The Nature Conservancy
  • University of Notre Dame
  • Trinity University
  • Misión Biológica de Galicia
  • University of Neuchâtel