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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 80 for “"interspecific competition"”.
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Effects of interspecific competition, salinity, and hurricanes on the success of an invasive fish, the Rio Grande cichlid (Herichthys cyanoguttatus)
… significant effect on H. cyanoguttatus growth. Interspecific behavioral experiments were conducted to examine potential biotic interactions with native fish species. Prior resident trials indicated that H. cyanoguttatus was aggressive whether holding territory or not, and that native bluegill …
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Dietary Shifts, Niche Relationships and Interspecific Competition in Sympatric Grey Langur (Semnopithecus entellus) and Purple-faced Langur (Trachypithecus vetulus) in Sri Lanka
… is a fundamental question in ecology. Interspecific competition has been shown to influence the behavior and ecology of organisms in a wide range of ecological communities. However, the broader role of interspecific competition in primate communities is unclear as relatively few studies …
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The Effect of Within-host Virus Population Growth and Interspecific Competition on Aphid Transmission and Population Structure of Barley Yellow Dwarf Virus
Barley yellow dwarf virus (BYDV) (Luteoviridae) species PAV and PAS are ecologically similar in that they share aphid vectors and host species, but in agricultural fields in New York State we found that the prevalence of PAV was three times greater than that of PAS. To determine if differences in …
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Effect of container size and larval competition on adult fitness of Aedes aegypti and Aedes albopictus (Diptera: Culicidae)
… and abiotic parameters can modify the outcome of interspecific competition between the two mosquito species. In this study, we conducted laboratory bioassays to test the hypothesis that container size alters the magnitude and direction of intra- and interspecific competition between Ae. aegypti …
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A quantitative model of density-dependent habitat selection: integrating isodar and isoleg theories
… model of habitat selection that includes interspecific interactions. The basic model expresses habitat quality in terms of fitness, represented by per capita growth rates, calculated according to the Lotka-Volterra competition equations. Because fitness is assessed via growth rates, this …
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Purple nutsedge (Cyperus rotundus L.) competition with cotton: Species biology and effects of proportion, density, and moisture
… factors and water stress interact to influence competition between purple nutsedge and upland cotton. Purple nutsedge produced more total dry weight than cotton in wet conditions but produced less or similar total dry weight in dry conditions. Cotton's ability to extract water from greater soil …
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Inbreeding Depression and Competition in the square-stemmed monkey-flower (Mimulus ringens)
… fitness-related traits. However, the effects of interspecific competition on inbreeding depression are much less clear, as studies have yielded mixed results, leading some authors to conclude that interspecific competition is unimportant in models of mating system evolution. <italic>Mimulus …
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The Impact of Neighborhood-Based Processes on Demography and a Decline in Species Diversity in a Temperate Deciduous Forest
… species diversity, including density-dependence, interspecific competition, and disturbance, should be able to elucidate not only the causes of the maintenance of species diversity, but also its decline. This study investigated how these three processes contributed to a decline in species …
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The competitive dynamics of two Protea shrubs growing in a mixed fynbos stand
… among Protea species were investigated. Interspecific competition was studied as a cause of these patterns. Two different methods were used for measuring competition in a mixed stand of P. lepidocarpodendron and P. corona/a growing on the Cape Peninsula. These were the plot-based …
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Restoration of A. fasciculatum at Rocky Canyon Granite Quarry, San Luis Obispo, CA
… meter plots managed to test the effects of interspecific competition with native postfire vegetation, post-mining volunteer vegetation, and intraspecific only competition. Plots were managed and observed from December 2004 to May 2006. Half of the 48 plots were summer irrigated throughout …
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Co-existence in the Phoebetria albatrosses at Marion Island
… is investigated in their zone of overlap where interspecific competition for food resources and nesting space is likely to be most acute. Secondly, the genetic isolation of the two species is investigated, as co-existence implies increased interspecific social interaction with associated …
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Behavioural ecology of Peregrine and Lanner falcons in South Africa
… relative influence of resource limitation and interspecific competition with congeners on the natural regulation of Peregrine populations in tropical environments.
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Seed morphology and colour variation in derotinous Cape Proteaceae
… in different habitats. This has implications for interspecific competition and species distribution limits.
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The role of parents in Evolution
… beetle ecology and how the guild structure and interspecific competition in local populations can shape phenotypic evolution of my focal species, $\textit{N.~vespilloides}$. Interspecific competition shapes how the carrion niche is partitioned, which feeds back onto the evolution of body size …
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An Ecophysiological study of two key grass species, Anthephora Pubescens Nees and Eragrostis Curvula (Schrad.) Nees
… (Schrad.) Nees cultivar Ermelo. Increasing competition resulted in a decrease in the total yield per plant in both species. Eragrostis curvula proved to be the superior competitor, while A. pubescens was evidently an inferior competitor exhibiting high sensitivity to both forms of …
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Soil factors and competition as determinants of fynbos plant species distributions in the South-western Cape, South Africa
… Very little is known about the importance of interspecific competition in fynbos communities. A three-year field experiment was set up to investigate its role in determining species distribution patterns across community boundaries and soil gradients. Each of the three pairs of Proteaceae …
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Impact of nutrient heterogeneity on plant response and competition in Coastal plain species
… weak (-0.40 < r < 0.17). In two-species plots, interspecific competition was influenced by soil heterogeneity in two of six cases tested (P < 0.05), and precision was the behavior most correlated with competitive success. In six-species plots, spatial pattern of nutrients had no influence on …
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Ecology of acidification and recovery in Welsh upland streams
… in faunal recolonisation. A resident-colonist competition experiment revealed no evidence in support of biotic resistance as mediated through interspecific competition, whereas growth experiments revealed that the quality or palatability of algal resources in chemically ‘restored’ streams …
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