Browsing F. Leland Russell by Title
Now showing items 4-23 of 38
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Canopy gap regime as a function of woodland age in the Kansas Cross Timbers
(Springer Nature, 2019-09)Oaks (Quercus spp.) have low or intermediate shade-tolerances and forest canopy gaps can promote their regeneration. Current fire frequencies and/or intensities in eastern North America are less than they were historically, ... -
Combined effects of competition and herbivory limit population growth and spread of Cirsium vulgare: Demographic comparison of an introduced thistle with its native congener
(2011-08)Background/Question/Methods The European Cirsium vulgare is an invasive species worldwide, but in Nebraska it has remained at very low densities for over 200 years. The leading hypothesis is that pre-adapted, specialized ... -
Combined effects of folivory and neighbor plants on Cirsium altissimum (tall thistle) rosette performance
(Springer, 2010)Predicting how herbivory and neighbor plant interactions combine to affect host plants is critical to explaining variation in herbivores’ impact on plant population dynamics. In a field experiment, we asked whether the ... -
Context dependency of insect and mammalian herbivore effects on tall thistle (Cirsium altissimum) populations
(Oxford University Pres, 2019-06)Identifying factors that drive variation in herbivore effects on plant populations can provide insight for explaining plant distributions and for limiting weeds. Abiotic resource availability to plants is a key explanation ... -
Deer browsing and light availability limit post oak (Quercus stellata) sapling growth and post-fire recovery in a xeric woodland
(Elsevier, 2022-06-06)Historically, oaks dominated the canopies of large regions of eastern North American forests, but at many sites current recruitment is insufficient to sustain oak dominance. Intense browsing by white-tailed deer (Odocoileus ... -
Demographic structure and genetic variability throughout the distribution of Platte thistle (Cirsium canescens Asteraceae)
(John Wiley & Sons, Inc., 2017-02)AimUnderstanding spatial variation in the demographic and genetic structure of populations is central to explaining causes of species range limits and to species conservation. The Abundant Centre Hypothesis (ACH) predicts ... -
Effects of apical meristem mining on plant fitness, architecture, and flowering phenology in Cirsium altissimum (Asteraceae)
(American Journal of Botany, Inc., 2014-12)Premise of the study: Interactions that limit lifetime seed production have the potential to limit plant population sizes and drive adaptation through natural selection. Effects of insect herbivory to apical meristems ... -
Effects of white-tailed deer (Odocoileus virginianus) on plants, plant populations and communities: A Review
(The University of Notre Dame, 2001-07)Large effects of white-tailed deer (Odocoileus virginianus) upon individual plants, plant populations and communities have been documented in a number of studies. However, well-supported experimental measures of the ... -
Effects of white-tailed deer on the population dynamics of acorns, seedlings and small saplings of Quercus buckleyi
(2004)To measure the effects of white-tailed deer (Odocoileus virginianus) herbivory on seeds, seedlings, and young saplings of Quercus buckleyi on the eastern Edwards Plateau of central Texas, USA, experimental fenced ... -
An exception to Darwin's syndrome: floral position, protogyny, and insect visitation in Besseya bullii (Scrophulariaceae)
(1995)Darwin pointed out that plants with vertical inflorescences are likely to be outcrossed if the inflorescence is acropetalous (flowers from the bottom up), the flowers are protandrous (pollen is dispersed before stigmas ... -
Failure of adult recruitment in Quercus buckleyi populations on the Eastern Edwards Plateau, Texas
(The University of Notre Dame, 2002-10)In many semiaridr egions woodlands, savannas and grasslands form an unstable landscape mosaic; the physiognomy of a particular patch in the mosaic changes over time. To explain such temporal and spatial variation in tree ... -
High soil nitrogen levels and insect herbivory suppress tall thistle (Cirsium altissimum) rosette survival
(2012-08)Background/Question/Methods The effect of herbivores on plant performance is often highly variable and the causes of this variability are poorly explained for many herbivore-host plant interactions. Many of the proposed ... -
Historical patterns of oak population expansion in the Chautauqua Hills, Kansas
(John Wiley & Sons, Inc., 2014-06-18)AimRates of tree population expansion have increased in many North American landscapes that were mosaics of grasslands, savannas and woodlands historically. Consequences of woodland expansion include reduced economic return ... -
Indirect interaction between two native thistles mediated by an invasive exotic floral herbivore
(Springer, 2005-12)Spatial and temporal variation in insect floral herbivory is common and often important. Yet, the determinants of such variation remain incompletely understood. Using 12 years of flowering data and 4 years of biweekly ... -
Insect herbivore effects on resource allocation to shoots and roots in Lespedeza capitata
(Springer, 2012-05)Aboveground and belowground processes in plants are intimately linked because the resources that must be divided among growth, maintenance, and development of essential structures are finite. To determine how aboveground ... -
Integral projection models show exotic thistle is more limited than native thistle by ambient competition and herbivory
(Ecological Society of America, 2015-04)Both competitors and natural enemies can limit plant population growth. However, demographic comparisons of the effects of these interactions on introduced versus co-occurring, related native species are uncommon. We asked: ... -
Interactive effects of insects, mammals, and soil fertility on grassland plant community structure
(2014-08)Background/Question/Methods Herbivory is expected to have important effects on grassland plant community structure and biomass. However, the effects of herbivores may be mitigated by plant resource availability, which ... -
Invasiveness of some biological control insects and adequacy of their ecological risk assessment and regulation
(Society for Conservation Biology, 2003-02-23)The problem of invasive species has reignited interest in biological control as a management tool.Classical biological control involves deliberate release of exotic natural enemies into new environments in an attempt to ... -
Local- vs. landscape-scale indirect effects of an invasive weed on native plants
(Weed Science Society of America, 2004)Insect-mediated indirect interactions between native plant species recently have been shown to be important determinants of plant performance in a number of ecological communities. However, the potential indirect effects ...