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 38 for “"assemblage structure"”.
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Fish Assemblage Structure Before and After a Marine Heatwave in West Hawai'i
… to climate change by analyzing changes in fish assemblages following a marine heatwave. We analyzed 11 years of subtidal video survey data in three areas in West Hawai'i, capturing a marine heatwave event from 2014 - 2016. Fish were counted and identified to species, then assigned to one of …
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Fish Assemblage Structure, Distribution, and Trophic Ecology at Northwestern Gulf of Mexico Banks
… had three main objectives: 1) define reef fish assemblages at northwestern Gulf shelf-edge banks and determine if assemblages were related to the varied benthic habitats present at these features, 2) define large-scale fish distributions at these same banks and determine the influence of habitat …
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Assemblage structure and shallow-water habitat use by small-bodied fishes at lower Missouri River sandbars
… factors were also measured. Habitat use and assemblage structure relative to three spatial (sandbar type, region within sandbars, and distance from shoreline within region) and two temporal (month, diel), and environmental factors were evaluated using Analysis of Variance, Detrended …
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Groundfish species diversity and assemblage structure in Icelandic waters during a period of rapid warming (1996-2007)
Hlýnandi loftslag undanfarinna ára hefur valdið breytingum á útbreiðslu fiskitegunda á norðurhveli jarðar. Ólík svörun tegunda við hækkandi hita getur leitt til breytinga á samfélagsgerð og staðbundnum tegundafjölda. Í kjölfar breytinga á sjávarhita hafa verið skráðar breytingar á stofnstærð og …
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Influence of stream connectance and network spatial position on fish assemblage structure in the Kansas River basin, USA
Stream networks provide complex habitats for fish assemblages that can vary gradually along a gradient of stream size or abruptly at transition zones between large rivers and their tributaries. We evaluated the relative importance of these gradual and abrupt habitat transitions in regulating stream …
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Plant Assemblage Structure on Barrier Island ‘Pimple’ Dunes at the Virginia Coast Reserve Long-Term Ecological Research Site
… of the barrier islands. There are distinct plant assemblage zones found on pimples, although most of these dunes are 10–20 m in diameter. Hypotheses of the study were that fresh water availability was a main determinant of differences between assemblages and that pimple size and location would …
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Distributions, Assemblage Structure, and Habitat Associations of Fishes in Two Streams of the Red Bird River Watershed, Kentucky
… and temporal variation in fish distribution, assemblage structure, and habitat associations were investigated in relation to the available macrohabitats (riffle, run, or pool) in Gilbert's Big Creek and Elisha Creek, 2nd and 3rd order streams, respectively, located within the Red Bird River …
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Effects of stream network topology on fish assemblage structure and bioassessment sensitivity in the mid-Atlantic highlands, USA
Stream fish assemblages exist within stream networks defined by the size and proximity of connected streams (i.e., stream network topology). The spatial position of sites within stream networks may therefore regulate opportunities for fish dispersal to access distant resources or colonize "new" …
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Fish Assemblage Structure, Trophic Ecology, and Potential Effects of Invading Asian Carps in Three Missouri River Tributaries, South Dakota
… rate and have the potential to disrupt the structure and function of these systems. Two invasive species, Bighead Carp and Silver Carp (Asian carps), are spreading in the Mississippi River Basin and more recently into the Missouri River basin and tributaries. Asian carps exhibit fast …
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Variability in north temperate dung beetle assemblages at different spatial and temporal scales
… spatial and temporal variability of dung beetle assemblages across a variety of scales e.g. from the between-pad scale (examining the effects of dung size and type) to larger spatial scales encompassing southern Ireland. Dung beetle assemblage structure as sampled by dung pad cohort samples and …
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Avian assemblages and Red-eyed Vireo nest survival within mineland forest
… study of the relationship between habitat structure and the avian assemblage within pre-SMCRA mineland forest could provide insight into the species assemblages that future mineland reforestation efforts might yield. Study of the reproductive success of forest songbirds within pre-SMCRA …
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Quantifying the environmental factors that determine benthic macroinvertebrate assemblages in streams by analyzing stressors associated with a gradient of cattle grazing
Relationships between macroinvertebrate assemblages and environmental stressors were assessed from fall 2002 through spring 2004 in five small streams that represented a study design that involved a gradient of increasing stress (increased cattle density). Macroinvertebrate assemblages were related …
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Micro scale heterogeneity of spiders (Arachnida: Araneae) in the Soutpanberg, South Africa: a comparative survey and iventory in representative habitats
… be present at finer scales. Studies of arthropod assemblage structure at fine (1 x 1 km) scales are rare, but important, because these are the spatial level at which real world applications are viable. The study investigates fine-scale variation in spider assemblages, comparing five representative …
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Assessment Of The Macroinvertebrate Assemblages From The Mesohabitats Of A Headwater Stream-Wetland Hydrologic Restoration In Eastern Kentucky
… of this study was to quantify macroinvertebrate assemblages from Slabcamp Creek and compare the assemblages to a site representing Kentucky Division of Water's headwater reference conditions and a pre-restoration condition control site. Specific objectives included: 1) compare macroinvertebrate …
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The Impact of Urbanization on Benthic Macroinvertebrates in Southern Appalachian Streams
Macroinvertebrate assemblage structure was compared from 12 streams differing in urbanization type and degree. Urbanization, both historical and current, was measured using several variables generated from GIS overlays of land cover, aerial photographs, and field exploration in the study …
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Influences of land use on the structure and function of headwater streams: A multiple scale analysis
The structure and function of stream ecosystems may be strongly influenced by land-use practices within watersheds. The magnitude of land-use impacts may depend upon the spatial arrangement of development in watersheds. This study examines the relationship between land-cover patterns and stream …
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"Of things related": network assemblages in the longform poems of Muriel Rukeyser, Melvin Tolson, Langston Hughes and Louis Zukofsky
… is created through a heterogenous, multi-vocal assemblage of sourced material networked together as a single structure: the poem. The network assemblage structure of the poems speaks to each of these poets’ midcentury concerns related to topics such as the environment, race, class, personhood …
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Chironomidae Contributions to the Macroinvertebrate Assemblage, Index of Biotic Integrity and Relationships to Water Quality Impairment for Eastern South Dakota Streams
… of Chironomidae to macroinvertebrate assemblage structure has not been explored extensively from wadeable perennial streams of the Northern Glaciated Plains (NGP). Moreover, no effort has been attempted to develop a multimetric index of biotic integrity (IBI) using Chironomidae larvae. …
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Feeding Selectivity and Habitat Usage of <i>Esox americanus</i>
… important trophic component in maintaining fish assemblage structure in many lower order streams. Across 17 sampled streams, the presence of <em>E. americanus</em> among reaches within streams was found to be strongly correlated with increasing levels of habitat complexity. Reaches occupied by …
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Quantifying biotic interactions with inshore subtidal structures: comparisons between artificial and natural reefs
… used in the assessment of subtidal epibiotic assemblage structure followed by a detailed study to compare epibiotic recruitment to artificial and natural reefs using PVC plastic recruitment panels. Predator exclusion cages were used to assess the effects of predation on epifaunal recruitment …
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