Global ETD Search
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 13 of 13 for “"Native predators"”.
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The Influence of Metacommunity Connectivity and Invasive Species on Diversity and Ecosystem Properties: Invasion, Predation by Native Species, and Genetic Diversity of Propagules
… for exerting strong negative impacts on native biota and ecosystems. Because of this, billions of dollars are spent toward invasion prevention and control efforts annually. Once invaders have become established in a novel environment, however, eradication efforts are often not only …
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EPIDEMIOLOGIC ANALYSIS OF RISK FACTORS FOR LOCAL DISAPPEARANCES OF NATIVE RANID FROGS IN ARIZONA
… cases during the study period. Elevation, non-native predators, hydrologic characteristics, aspect, and effects of nearby sites were significantly associated with frog persistence or disappearance. In the final multivariable model, risk for disappearance increased with increasing elevation …
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Impacts of non-native rainbow trout on stream food webs in the Cape Floristic Region, South Africa integrating evidence from surveys and experiments
Impacts of invasive predators may be influenced by whether or not native predators which function in the same way as the invasive predator exist in the recipient system. Impacts are expected to be strong in isolated systems lacking functionally similar predators because native species will be naïve …
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Biotic and abiotic factors influencing the invasion success and ecological impacts of the Pacific oyster, Crassostrea gigas
… the context. However, invasions onto beds of the native blue mussel, Mytilus edulis, have seen shifts in dominance from mussels to oysters. Although invasions of C. gigas have been investigated, the influence of water motion on its invasion success and interactions with native M. edulis is almost …
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Predator Recognition and Avoidance in the San Marcos Salamander
Selection by predators is among the most important forces acting on prey populations. To persist with predators, prey must be able to recognize and respond to predatory threats. Despite the benefits of avoidance, there are time allocation tradeoffs with foraging and mating that make excessive …
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Behind anemone lines: determining the environmental drivers influencing lagoonal benthic communities, with special reference to the anemone Nematostella vectensis.
… adjacent to surface water outflow pipes. The non-native protected Starlet Sea Anemone Nematostella vectensis was also significantly negatively correlated with organic matter and silt content. It is known to be sensitive to hypoxic-sulfidic conditions associated with high organic matter sediments. …
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Chemically-mediated prey responses: invasive brook stickleback induced changes in behavior and life history of larval long-toed salamanders
… responses of a larval amphibian to its natural predators and to an unfamiliar fish. Amphibians express chemically-mediated antipredator defenses in behavior, morphology and life history, and are currently threatened with predation by invasive fish. To investigate this issue, we first initiated a …
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Investigating the natural history and predator complex of the native pine bark adelgid (Pineus strobi) in southwestern Virginia
… Pineus strobi (Hemiptera: Adelgidae) is a native herbivore of eastern white pine, Pinus strobus (Pinales: Pinaceae), in eastern North America. It is a sessile insect that settles on P. strobus and inserts its stylet bundle to feed on the tree’s phloem. Although P. strobi is not considered a …
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Opportunities and Constraints of Sierra Nevada Meadow Restoration for the Mountain Yellow-Legged Frog Species Complex
… most scientific efforts for MYLF, such as non-native fish removal and research on disease dynamics, are being conducted at high-elevation habitats. The purpose of this literature review was to evaluate the potential opportunities and constraints of wet meadow restoration for MYLF. An evaluation …
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Prey preference for Asian carp and soft plastic lure ingestion by largemouth bass
… to predation of Asian carp compared to native species. We sought to examine largemouth bass (Micropterus salmoides) predation on juvenile bighead and silver carp in relation to common native prey species. Prey species selection experiments in 2-m pools showed number of prey captures was …
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The ecology of a recovering native predator: the European pine marten (Martes martes)
Predators have undergone severe historical decline due to human persecution and habitat loss. Predator populations are starting to recover in parts of Europe for the first time in response to protective legislation and conservation efforts. The landscapes native predators are recovering in are …
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AN INQUIRY INTO ECO-LABELING: THE PROMISE OF PREDATOR FRIENDLY CERTIFICATION (PFC)
… agriculture movement are efforts to live with predators rather than eliminating them through lethal means. This is reflective of the changing conversation around predators in the New West. Means of co-existence include livestock guardian animals, electric fencing, fladry, range rider patrols, …
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AN INQUIRY INTO ECO-LABELING: THE PROMISE OF PREDATOR FRIENDLY CERTIFICATION (PFC)
… agriculture movement are efforts to live with predators rather than eliminating them through lethal means. This is reflective of the changing conversation around predators in the New West. Means of co-existence include livestock guardian animals, electric fencing, fladry, range rider patrols, …