Browsing F. Leland Russell by Issue Date
Now showing items 1-20 of 38
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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 ... -
Rarity of oak saplings in savannas and woodlands of the Eastern Edwards Plateau, Texas
(Southwestern Association of Naturalists, 1999-03)Anecdotal evidence suggests that Quercus fusiformis and Quercus buckleyi, two dominant trees of central Texas savannas and woodlands, are not recruiting to adult size classes on the eastern Edwards Plateau. To evaluate ... -
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 ... -
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 ... -
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 ... -
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 ... -
Phenological synchrony affects interaction strength of an exotic weevil with Platte thistle, a native host plant
(2004-04-01)Phenological synchrony of a consumer population with its resource populations is expected to affect interaction intensity. We quantified phenological variation and synchrony of populations of an invasive Eurasian flower ... -
Assessment of ecological risks in weed biocontrol: input from retrospective ecological analyses
(Elsevier, 2005-11)Prediction of the outcomes of natural enemy introductions remains the most fundamental challenge in biological control. Quantitative retrospective analyses of ongoing biocontrol projects provide a systematic strategy to ... -
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 ... -
Variation in herbivore-mediated indirect effects of an invasive plant on a native plant
(2007-02)Theory predicts that damage by a shared herbivore to a secondary host plant species may either be higher or lower in the vicinity of a preferred host plant species. To evaluate the importance of ecological factors, such ... -
Spatial variation in seed limitation of plant species richness and population sizes in floodplain tallgrass prairie
(Springer Verlag, 2008-10-07)The relative importance of seed availability versus biotic interactions that aVect early life stages in limiting plant population sizes and determining composition of plant communities is a central debate in plant ... -
No interaction between competition and herbivory in limiting introduced Cirsium vulgare rosette growth and reproduction
(Springer, 2009-08)Both competition and herbivory have been shown to reduce plant survival, growth, and reproduction. Much less is known about whether competition and herbivory interact in determining plant performance, especially for ... -
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 ... -
Seed addition and spatial heterogeneity in grass establishment in a restored Kansas oak savanna
(2010-08)Background/Question/Methods Compared to their historical extent, oak savannas at the forest-prairie transition in the Midwestern United States are greatly reduced, in part, due to tree encroachment that produced closed ... -
Patterns in beaver herbivory in south-central Kansas riparian woodlands
(Kansas Academy of Science, 2010-09)Beaver (Castor canadensis) herbivory can strongly affect the physiognomy and successional dynamics of forests and woodlands near bodies of water. In the central and southern Great Plains, the riparian zones that occur in ... -
Seed availability and insect herbivory limit recruitment and adult density of native tall thistle
(2010-10)Understanding spatial and temporal variation in factors influencing plant regeneration is critical to predicting plant population growth. We experimentally evaluated seed limitation, insect herbivory, and their interaction ... -
Wichita State University Virtual Herbarium: Filling a critical gap
(Kansas State University. Great Plains Plant Systematics Symposium, 2010-10-08)The Wichita State University (WSU) Herbarium is an active, regional collection with data that fill an important geographical gap in the Great Plains region. Specimens and associated data are essential in the management ... -
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 ...