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 20 of 20 for “"invasibility"”.
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Diversity, Invasibility, and Stability of Appalachian Forests across an Experimental Disturbance Gradient
… by nonnative earthworms might influence invasibility of forests using forest floor mesocosms (Chapter 3). I found that plant invasion was inhibited by native oak litter even when earthworms were present, suggesting that oak forests may resist plant invasions via oak tree litter. In …
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Nearshore zooplankton communities of Lake Michigan and implications for invasibility by Asian carp
Recent, dramatic shifts have occurred within zooplankton community structure in Lake Michigan. Such changes could alter the ability of invasive species, such as Asian carp, to establish self-sustaining populations. Without knowledge of spatial characteristics of zooplankton communities, it is …
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Plant Community Invasibility in Riparian Landscapes: Role of Disturbance, Geomorphology, and Life History Traits
The majority of this dissertation focuses on the ecology of non-native, invasive riparian plants, river regulation, and the potential for restoration. For chapters one and two, I researched different aspects of the <italic>Tamarix</italic> invasion along the Colorado River through the Grand Canyon. …
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The Role of Native Diversity and Successional Processes on Communityinvasibility in Riparian Primary Forest
… patterns and processes which govern community invasibility but relatively few have examined invasibility in a successional context. Explored here is the potential for biotic resistance to reduce invasibility of riparian successional forests at the landscape scale (~100ha) and address the …
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Emergent behaviors in complex microbial ecosystems
… emergent phenomena of diversity, stability, and invasibility in these communities within a unified framework has been a significant challenge. My PhD thesis addresses this knowledge gap by conducting the first direct test of a theory proposing that simple community-level features govern emergent …
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Disturbance impacts on non-native plant colonization in black spruce forests of interior Alaska
… that we understand how disturbances influence invasibility in northern boreal forests, to avoid the economic damage other regions have experienced from invasive plants. Black spruce (Picea mariana) is the dominant forest type in interior Alaska, and wildfire is the dominant disturbance in these …
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The ecology of invasions by Pinus (pinaceae) and Hakea (proteaceae) species, with special emphasis on patterns, processes and consequences of invasion in mountain fynbos of the southwestern Cape Province, South Africa
… invaders; (iii) studies of the determinants of invasibility; and (iv) assessments of the consequences of invasion and of control programmes. Bibliography: pages 235-272.
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Towards bioengineered ecosystems: Three studies in invasion biology
"An important feature of ecosystems is their invasibility, i.e. their resistance to invasion by nonnative organisms. Invasion is a driver of change at scales as small as a bioreactor and as large as the scale of biogeography. Invasion can be either a desired outcome, for example in the use of …
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Fish invasions in the Mid-Atlantic region of the United States
… between ecosystem characteristics and invasibility by compiling data on watershed characteristics and correlating these with NNSR. I included measures of colonization pressure (i.e., the number of species introduced) and research effort, which can bias patterns of NNSR. After …
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Is The Exotic Brazilian Pepper, Schinus Terebinthifolius, A Threat To Mangrove Ecosystems In Florida?
… in mangrove habitat. By better understanding the invasibility and impact of Schinus terebinthifolius on mangroves, coastal resource managers will be able to develop the most effective management strategies to prevent this exotic from altering the structure and productivity of the mangrove …
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Ecotypic Variation in Johnsongrass in Its Invaded U.S. Range
… highlights agriculture's role in facilitating invasibility. This tandem approach to climate and land use as drivers of intraspecific variation is transferable to other taxa and can help refine our conception of and response to invasion in the Anthropocene.
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Plant communities along Irish roads: the impact of humans and potential to improve biodiversity
… fragrans) were used to test the relative invasibility of four landscape treatments: two followed an ecological design, two a traditional approach. Undisturbed plant communities (following an ecological treatment or not) provided best resistance to invasion. Bare soil that had followed an …
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Temporal trends in stream-fish distributions, and species traits as invasiveness drivers in New River (USA) tributaries
… that human land-use practices have increased the invasibility of highland watersheds by creating novel conditions suited to lowland and equilibrium invaders.
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Using patchy plant invasions to understand how diffuse interactions modify facilitation and competition
… of this conditionality for community invasibility. Additionally, I expanded this research to investigate how these two invaders interact with each other as they overrun native ecosystems. Throughout intermountain prairie of western Montana <i>Centaurea</i> was found at high abundances …
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Using patchy plant invasions to understand how diffuse interactions modify facilitation and competition
… of this conditionality for community invasibility. Additionally, I expanded this research to investigate how these two invaders interact with each other as they overrun native ecosystems. Throughout intermountain prairie of western Montana <i>Centaurea</i> was found at high abundances …
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Plant community restoration on mima mounds at Turnbull National Wildlife Refuge, WA
… increase native species abundance and reduce invasibility. Eastern Washington's Channeled Scablands bioregion has highly fragmented remnant patches of grassland underlain by glacial alluvium and basalt bedrock that are dotted with Mima mounds (naturally occurring aggregations of fine particle …
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The Ecology of Invase tree species in Singapore
… Asia because it is a `worst case scenario? for invasibility, with a high level of deforestation, intensive land-use, and numerous deliberate tree introductions. Seventeen naturalized tree species were identified from a thorough literature review, communicating with local botanists and extensive …
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Effects of diversity on community assembly dynamics in newly formed pond communities
… can enhance priority effects thereby decreasing invasibility of later arriving colonists (termed evolution-mediated priority effects). Nevertheless, empirical investigations of these diversity effects, at both the genetic and species level remain rare, especially for animal systems. To test this …
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Exotic Species Invasion and Biodiversity in Bangladesh Forest Ecosystems
… was conducted to examine the invasiveness and invasibility characteristics in a forest ecosystem of Bangladesh. This study seeks to find out the characteristics of exotic species and relationships between native species richness, environmental variables, disturbances and exotic plant invasion …