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Showing 1 to 20 of 20 for “"ruderal"”.
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Relationship between seed dormancy and persistence of seeds of annual ruderal species in the soil seedbank
… was conducted in Savoy, IL, involving twelve ruderal weed species: Abutilon theophrasti, Alliaria petiolata, Amata tuberculatus, Ambrosia trifida, Chenopodium album, Ipomoea hederacea, Kochia scoparia, Panicum miliaceae, Polygonum pensylvanicum, Setaria faberi, Setaria lutescens, and Thlaspi …
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Habitat Use And Seasonal Activity Of Selected Snakes On John F. Kenned
… types varied from nine to 12. Drift fences in ruderal habitats had the highest species richness, while fences in swales captured the greatest number of individuals. The most dissimilar habitat pair was scrub and swale, while the most similar pair was ruderal and hammock. Box traps proved more …
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Managing open habitats for species conservation : the role of wild ungulate grazing, small-scale disturbances, and scale
… Corynephorus canescens-dominated grassland, (ii) ruderal tall forb vegetation dominated by Tanacetum vulgare and (iii) Pinus sylvestris-pioneer forest over three years. Our results demonstrate that wild megaherbivores considerably affected species composition and delayed successional pathways in …
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EFFECTS OF ANTHROPOGENIC SELECTION PRESSURE ON THE EVOLUTION OF A COMMON AGRICULTURAL WEED: DOES ADAPTATION COME WITH A DETECTABLE COST? A STUDY OF GLYPHOSATE-RESISTANT (GR) AND -SUSCEPTIBLE (GS) BIOTYPES OF Conyza canadensis
… a old-field in the second year of succession (ruderal) and a soybean field planted with a GR cultivar (agrestal) (Experiment 2, Chapter 3). One of the GR populations (R1) had the highest survivorship of the four populations in the ruderal habitat, while there was no difference in survivorship …
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Vegetation Ecology and Fire Effects on Community Structure, Composition, and Diversity in a Barrens Remnant and a Flatwoods in Southern Illinois
… diversity included typical flatwoods species and ruderal taxa. Changes among species at GCB included a trend towards greater dominance of C3 graminoid species compared to the former dominance of C4 species. Decline in C4 grasses occurred at both the fire-treatment and control areas. At MVF, …
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The Effects of Vegetation on Ecosystem Services Provisioning by Stormwater Bioretention
… all climate zones, there is a notable anti-ruderal bias, which could limit bioretention resilience by reducing its capacity for self-repair. The third chapter explores how these biases influence hydrologic services in different climate zones, using saturated hydraulic conductivity (Ksat) as …
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Beyond the Pristine: Reframing the Notion of Nature Conservation through the Agency of Plant 'Vagabonds' in Toronto's Rouge National Urban Park
… Clément's research on "vagabonds" as valuable ruderal species with design agency. Using fieldwork, mapping, document analysis, and model making as catalysts for design intervention, the work proposes the park's transformation into a vagabond living lab, employing a network of experimental …
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Grassland Dynamics on Revetments at RAF Caerwent, Monmouthshire, South Wales
… conditions. Change in species types from ruderal to stress tolerators is consistent with Grime's successional model but is supported only weakly and by a minority of the species present. Feet's model of competitive sorting is strongly supported at the l-3m scale but refuted at larger …
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Chionodes mediofuscella (Clemens) (Lepidoptera:Gelechiidae), an indigenous insect infesting the seeds of giant ragweed (Ambrosia trifida L.) (Compositae)
… Ambrosia trifida L., giant ragweed, is a ruderal plant widely distributed throughout the eastern and central portions of North America. The greatest concentration of this species occurs along the drainage areas bordering the Mississippi and Missouri Rivers. This plant is an annual, and …
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Plant Community Development of Isle Royale's Moose-Spruce Savannas
… had a notable shift from forest herbs to ruderal species, especially non-native plants. This succession was influenced strongly by the underlying bedrock and hydrology altering moisture regimes and plant communities. <em>Picea glauca</em> and <em>Poa pratensis </em>competed in a dynamic …
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Introgression of genes from rape to wild turnip
Introgression of genes from crops into ruderal populations is a multi-step process requiring sympatry, synchronous flowering, chromosomal compatibility, successful pollination and development of the zygote, germination, establishment and reproduction of hybrid progeny. The goal of this thesis was …
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Investigations of physiological and competitive relationships of Elymus species related to establishment in the Great Basin, USA.
… for limiting nutrients: Bromus tectorum employs ruderal strategies of resource acquisition, is an effective competitor for water and nitrogen, and can cause mortality of natives in invaded fields as well as prevent establishment of native seedlings. In response to the survival pressure placed on …
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The vegetational and archaeological history of the Ingleborough Massif, North Yorkshire
… type pollen with smaller percentages of other ruderal pollen types and occasional cereal grains. The evidence points to both pastoral and arable farming being practised on the well-drained Carboniferous Limestone soils. After a short tree recovery, widespread clearance was renewed on the massif …
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Implications for biodiversity of the deployment of commercial scale short rotation willow coppice
… and arable land with a shift from an annual and ruderal to competitive and perennial dominated community. The composition of winged invertebrate Orders also varied between the land uses with higher numbers of Hymenoptera and Hemiptera trapped within the willow SRC plantations than within the …
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Feral oilseed rape populations within a scottish landscape : Implications for GM coexistence and environmental risk assessment
… associated with feral oilseed rape and a related ruderal plant charlock were compared to gauge the potential ecological impact of ferality. Ferals did not appear to compete with charlock but provided an additional host for those invertebrate species already living on charlock. They also had the …
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Balancing the Water Budget: the effect of plant functional type on infiltration to harvest ratios in stormwater bioretention cells
… of CSR (Competitve, Stress-tolerant, and Ruderal) functional type to serve as an overarching framework characterizing the water use strategy of BRC plants. The goal is to determine if harvest (and therefore the ratio of urban runoff infiltrated to harvested; the I:H ratio) might be …
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Estudio agroecológico de las malezas : Helianthus annuus y Helianthus petiolaris
… de forma consistente a plantas agrestales y ruderales para ambas especies. Las plantas agrestales de H. annuus adelantaron una semana el estadio R1 y todas sus inflorescencias finalizaron la floración más de un mes antes que las ruderales. Más del 20 % de la semilla podría permanecer viable …
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Habitat use and activity patterns of Gopher Tortoises (Gopherus polyphemus) inhabiting military test ranges and forested sandhills at Eglin Air Force Base, Florida
The Gopher Tortoise is an important component of a number of upland ecological communities throughout the southeastern U.S., but populations have experienced significant declines over the past century, largely in conjunction with the loss of longleaf pine (Pinus palustris) forests. Military …
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Ecosystem impacts of tamarisk (Tamarix spp.) management in the Arkansas River watershed, Colorado: effects of disturbance and herbicide residues on passive plant community restoration
… have promoted secondary invasions of existing ruderal species. Ultimately data suggested that plant community re-vegetation patterns following tamarisk removal were more strongly affected by drought and longer term shifts towards community assemblages dominated by upland plant species. These …
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What is Lost When Time is Saved: Drawing in Collaboration with the Urban Periphery
<p>I pay attention to the overlooked spaces where land and industry meet, prompting me to wonder what can be gleaned in the oily and cracked urban periphery. With a focus on my hometown St. Louis, this industrial city is my subject matter. And so, I draw in a neighborhood bisected by a highway. I …