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 74 for “"Invertebrate communities"”.
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Influences of forests on invertebrate communities in Icelandic streams
Effects of forests on headwater stream invertebrate communities were studied in eastern and southern Iceland, which are two geologically different regions. The eastern research area is composed of solid basaltic rock with direct run-off streams. The streams drain treeless, birch and conifer …
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Extinction and recovery dynamics of Triassic-Jurassic macro-invertebrate communities
… decreased the ecological functionality of the invertebrate marine assemblage. In spatial terms, the UK fauna show a clear response to the extinction effect, but the diversity response of the Chilean assemblage is not clear at all, which may be related to taphonomical bias. Alternatively, this …
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COEXISTENCE, RESILIENCE AND RESISTANCE OF MARINE INVERTEBRATE COMMUNITIES ACROSS A LATITUDINAL GRADIENT
… community stability, and resistance. I studied communities of marine invertebrates across over 7000 km of continuous coastal habitat spanning 47-degree latitudinal range on the Eastern North and Central Pacific coast, from tropical Panama to subarctic Alaska. Experiments were based on the …
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The Effects of Simulated <i> Spermophilus Franklinii </i> Burrowing on Prairie Soil Invertebrate Communities
… have ecological effects on overlying vegetation, invertebrate communities, and surrounding soil characteristics. Franklin’s ground squirrel (<em>Spermophilus franklinii</em>) is a declining, tunneling mammal species previously found throughout Central Illinois. Preference for natural tallgrass …
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The effects of invasive knotweed (Fallopia japonica) on invertebrate communities in western New York
… thick, fast-growing thickets and may also affect invertebrate communities. By impacting invertebrate communities, knotweed can disrupt animals across the food web, causing declines in bird and frog populations. The goal of this study was to determine how Japanese knotweed impacts invertebrate …
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Interactive Effects of Cover Crops, Invertebrate Communities and Soil Health in Corn Production Systems
… use of insecticidal techniques. In this study, invertebrate community characteristics, soil health metrics, relative litter degradation rates in the presence and absence of invertebrates, yield, and profitability were assessed. Relationships among these metrics were examined, and trends between …
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Ecology and paleoecology of marine invertebrate communities in calcareous substrates, Northeast Quintana Roo, Mexico
A survey of benthic communities in the vicinity of Isla Cancun and Isla Contoy, Territory of Quintana Roo, Mexico, demonstrates that invertebrate death assemblages (i.e., future fossil assemblages) in this region reflect the in-place accumulation of remains of living benthic communities through …
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Effects of neonicotinoids and fungicides on soil invertebrate communities and litter decomposition within restored prairie
… fungicides can greatly impact the health of soil invertebrate communities. My study compares soil fauna community composition, abundance, species diversity, and litter decomposition across restored prairie plots treated with a neonicotinoid (clothianidin) and a fungicide (Captan). Soil …
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Assessment of Aquatic Invertebrate Communities of Tributaries of the Buffalo River, Arkansas, and Evaluation of Indices of Community Integrity
… the National Park Service to assess the aquatic invertebrate community of the Buffalo River, Arkansas. The BRICI has been successfully used on the main-stem of the river, but not evaluated on tributaries in the watershed. The purpose of this study was to evaluate the BRICI, comprised of 10 …
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The impact of pine plantations and alien invertebrates on native forest and fynbos invertebrate communities in Table Mountain National Park
… is renowned for its exceptional plant and invertebrate diversity and endemism, extensive alien plant invasions and exotic pine plantations threaten and reduce native species richness. This study frames invasion ecology theory in a conservation context, and examines the impact of planting …
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The Study of Benthic Invertebrate Communities in: -(a) Lotic Eutrophic Waters (b) A River in Stages of Recovery from Past Pollution
… water quality on the recovery of the macro-invertebrate structure of the benthic communities has been studied, noting changes in the community structure and membership. Benthic macro-invertebrate communities living under different regimes of eutrophication in experimental streams and in …
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Impact of mine pollution of composition, diversity and structure of plant and ground-dwelling invertebrate communities around Kombat mine tailing dump, Namibia
… of heavy metal pollution on vegetation and communities of ground-dwelling invertebrates was investigated at Kombat Mine tailings dump in Namibia. Sixteen transect lines were marked around the dump. Plots, 15m x 15m, were marked at 50m intervals along each transect. Top soils in the …
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Body Size And Habitat Shading Influence The Consumptive And Non-Consumptive Effects Of Wood Frog (lithobates Sylvaticus) Tadpoles On Aquatic Invertebrate Communities
… and non-consumptive interactions on aquatic invertebrates largely unexplored. The objectives of this study were to quantify omnivory among wood frog (Lithobates sylvaticus) tadpoles, determine their consumptive and non-consumptive effects on invertebrate communities, and investigate whether …
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Unravelling abiotic and biotic drivers of biodiversity change in local plant and invertebrate communities after 80 years - a re-visitation study on the Studland peninsula.
How ecological communities respond to long-term environmental change via changes in species richness and composition is an urgent question in the 21st century as anthropogenic forces drive biodiversity declines across taxa and regions. As environmental conditions change over time, effects may …
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Ecological Studies on Benthic Macroinvertebrates in Lowland Rivers in Relation to Water Quality
The effectiveness of using macro-invertebrate communities as indicators of water quality and pollution in deep lowland rivers was investigated, and the effects of natural environmental changes on their ability to monitor pollution was assessed. Various sampling and data processing techniques were …
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The seasonal and spatial dynamics in the phytomacrofaunal communities of Lake Henley, Mastert : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Ecology at Massey Universityon
… filamentous algae associated with the weed beds. Invertebrate communities associated with submerged macrophytes were also examined at multiple sites between June 1993 and June 1994. Overall community composition was related more to seasonal influences than differences between sites within the …
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Lake Erie coastal marsh aquatic invertebrate community structure across habitats dominated by two different emergent macrophytes
… determine if there was a difference in aquatic invertebrate communities between areas dominated by<em> Phragmites australis</em> and areas dominated by <em>Typha spp</em>. in a freshwater coastal marsh. The hypothesis was that aquatic invertebrate diversity and abundance would be greater in …
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