2,568 results — type: Journal Article ·
Site fidelity by bees drives pollination facilitation in sequentially blooming plant species
AbstractPlant species can influence the pollination and reproductive success of coflowering neighbors that share pollinators. Because some individual pollinators habitually forage in particular areas, it is also possible that plant species could influence the pollination of neighbors that bloom late
Patterns of rust infection as a function of host genetic diversity and host density in natural populations of the apomictic crucifer, <i>Arabis holboellii</i>
It is often assumed that genetic diversity contributes to reduced disease incidence in natural plant populations. However, little is known about the genetic structure of natural populations affected by disease. Here I present data from three apomictic (asexual) populations of Arabis holboellii infec
Mantle structure beneath the western edge of the Colorado Plateau
Teleseismic traveltime data are inverted for mantle Vp and Vs variations beneath a 1400 km long line of broadband seismometers extending from eastern New Mexico to western Utah. The model spans 600 km beneath the moho with resolution of ∼50 km. Inversions show a sharp, large‐magnitude velocity contr
Social behavior and population dynamics of marmots
Population dynamics and social behavior of 5 populations were studied for 10 yr. Agonistic behavior characterized social interactions among adult females and yearlings who were subordinate. Rates of amicable and of agonistic behavior varied widely within a harem from year to year and among harems in
Impact of nectar robbing on estimates of pollen flow: conceptual predictions and emperical outcomes
Pollen movement within and among plants affects levels of inbreeding and plant fitness as well as the spatial scale of genetic differentiation. Pollen movement has primarily been studied as a function of the direct relationships between plants and pollinators; however, nonpollinating floral visitors
Integrating airborne remote sensing and field campaigns for ecology and Earth system science
Accepted Article Point 1: In recent years the availability of airborne imaging spectroscopy (hyperspectral) data has expanded dramatically. The high spatial and spectral resolution of these data uniquely enable spatially explicit ecological studies including species mapping, assessment of drought mo
Growth and survival of juvenile yellow-bellied marmots (<i>Marmota flaviventris</i>)
We compared patterns of growth in juvenile yellow-bellied marmots (Marmota flaviventris) between 2 years in which precipitation differed, and we determined if mass at entry into hibernation affects over-winter survival. Juveniles exhibited an asymptotic growth pattern with mass gain for a mean of 60
Consequences of variation in flowering time within and among individuals of <i>Mertensia fusiformis</i> (Boraginaceae), an early spring wildflower
Climate change is causing many plants to flower earlier in spring, exposing them to novel selection pressures, including—potentially—pollinator shortages. Over 2 years that contrasted in timing of flowering onset, we studied reproductive strategies, pollen limitation, and selection on flowering time
Thermal physiological ecology of Colias butterflies in flight
The balance of heat gain from sunlight versus heat loss from convection and radiation does not appear to change by more than a few percent between the wings-closed basking posture and the variable opening of wings in flight, although several aspects require further study.
VoxNet: an interactive, rapidly-deployable acoustic monitoring platform
Distributed acoustic sensing underlies an increasingly important class of sensor network applications, from habitat monitoring and bioacoustic census to security applications and virtual fences. VoxNet is a complete hardware and software platform for distributed acoustic monitoring applications that
Non-random orientation of entrance holes to woodpecker nests in aspen trees
Journal Article Nonrandom Orientation of Entrance Holes to Woodpecker Nests in Aspen Trees Get access D. W. Inouye D. W. Inouye Department of Zoology, University of North Carolina, Chapel Hill, North Carolina 27614 Search for other works by this author on: Oxford Academic Google Scholar The Condor,
Persistence and Plasticity in Conifer Water-Use Strategies
AbstractThe selective use of seasonal precipitation by vegetation is critical to understanding the residence time and flow path of water in watersheds, yet there are limited datasets to test how climate alters these dynamics. Here, we use measurements of the seasonal cycle of tree ring O for two wid
Habituation or sensitization? Long-term responses of yellow-bellied marmots to human disturbance
Abstract Continuous exposure to humans causes wildlife to either habituate or sensitize. Although increased tolerance may play an important role in coexistence with humans, the mechanisms and fitness outcomes of long-term changes of tolerance are not fully understood because only a few studies have
The Evolution and Ecology of Interactions Between Ants and Honeydew-Producing Hemipteran Insects
The interactions between ants and certain sap-feeding insects in the order Hemiptera are classic examples of food-for-protection mutualisms. In these associations, herbivorous hemipterans use a highly specialized, straw-like mouthpart to consume sap directly from plant phloem and xylem and, as a res
Nesting behavior of the American dipper in Colorado
Journal Article Nesting Behavior of the American Dipper in Colorado Get access Harry W. Hann Harry W. Hann Department of Zoology and Rackham School of Graduate Studies, University of Michigan, Ann Arbor, Michigan Search for other works by this author on: Oxford Academic Google Scholar The Condor, Vo
Song dialects and genetic differences in white-crowned sparrows (Zonotrichia leucophrys)
Field measures of flower constancy in bumblebees
Scale collapse and the emergence of the power law species–area relationship
AbstractAimThe recently proposed maximum entropy theory of ecology predicts that all nested species–area relationships (SARs) will collapse to a single, universal curve that exhibits a decreasing log–log slope with increasing scale, suggesting that the power law form of the SAR is invalid at any sca
A plant pathogen influences pollinator behavior and may influence reproduction of nonhosts
Some plant pathogens attract pollinating insects and thus have the potential to influence the pollination of flowers, just as different flower species can influence one another's pollination. Showy, flower—like pseudoflowers caused by the rust fungus Puccinia monoica on Arabis holboellii (Brassicace
Effects of flowering plant density on pollinator visitation, pollen receipt, and seed production in <i>Delphinium barbeyi</i>
Variation in flowering plant density can have conflicting effects on pollination and seed production. Dense flower patches may attract more pollinators, but flowers in those patches may also compete for pollinator visits and abiotic resources. We examined how natural and experimental conspecific flo