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 14 of 14 for “"Habitat Association"”.
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Habitat association and distribution of Nauticaris marionis at the Sub-Antarctic Prince Edward Islands
The habitat associations between the caridean shrimp Nauticaris marionis and sessile epibenthic assemblages and substratum types of the Sub-Antarctic Prince Edward Islands were investigated. Twenty five stations, varying in substratum type, depth and location on the shelf and slope around the …
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Population Size And Habitat Association Of Etheostoma Nebra, The Buck Darter, Using Abundance Modeling In The Buck Creek System, Cumberland River Drainage, Kentucky
… (1) determine population size, demographics, and habitat association of E. nebra in Big Spring Branch and Stewart Branch, (2) evaluate habitat conditions both within extant range and historical range, (3) complete fish surveys within the species' historical range, and (4) monitor and compare water …
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Investigating population status, habitat, and ecological interactions for the Sand Mountain blue butterfly, one of North America's most geographically restricted butterflies
… range (a single locality) and restricted habitat association as well as recreational activities at Sand Mountain. Motivated by the rarity of the butterfly and associated concerns, we ask the following questions: 1) is the E. p. arenamontana population stable across years? 2) are there …
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Influence of habitat complexity on diversity and community structure of arboreal spiders in grassland-shrub systems
… In grasslands, much of the arboreal habitat is in the form of shrubs, but the role and importance of shrubs in distribution and diversity of arthropods in grasslands is unknown. Spiders are a useful indicator for examining the role of shrubs in arthropod ecology because they are …
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Martial eagles and the national power grid in South Africa: the implications of pylon-nesting for conservation management
… to achieve. One solution is to use multivariate habitat association models to derive critical estimates of distribution and abundance. The South African population of Martial Eagle Polemaetus bellicosus is currently estimated at < 800 adult birds , with the bulk of the known population believed …
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From ecology to the assessment of multiple ecosystem services; a case study of estuarine bivalves
… functions, and ES) to derive insights into the associations between multiple ES provided by marine bivalves and the implications for management. In data-scarce marine environments, conventional spatial methods for assessing ES interactions and bundles are not always feasible. However, …
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Predicting salmonid population ecology from individual fish responses to environmental changes: bridging behaviour, conservation and fisheries management.
Current habitat-association models used in the management of the socio-economically and ecologically important chalk stream salmonid populations fail to incorporate fish behaviour and the interactions between fish with their environment and this limits their ability predicting management-relevant …
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Distribution and abundance of nearshore aquatic habitat, Fraser River, British Columbia
Physical habitat for instream biota derives from a combination of stream system structural and hydraulic phenomena. Consequently, the quantity and quality of physical habitat is dynamic both over time and in space along the river, laterally, longitudinally and vertically. Its characterization …
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Using eDNA and Habitat Suitability Modeling to Better Understand the Range and Habitat Requirements of the Eastern Black Rail
… to detect due to their small size, concealing habitat, and cryptic behavior. The most common survey method for rails uses audio callback but does not detect unresponsive individuals, is constrained seasonally as well as temporally, and requires significant personnel effort. New methods are …
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Does Urbanization Facilitate the Establishment of Introduced Monk Parakeet (Myiopsitta monachus) Populations?
… of some non-native species. Because of the habitat heterogeneity, varying resources, and an overall depauperate ecological community, urban environments may provide multiple underexploited niches for colonization by novel species. The Monk Parakeet (Myiopsitta monachus) is a prime example of …
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Cool as a caterpillar: Understanding the responses of butterflies to temperature across the life cycle
… understand the responses of insects to changing habitat and microclimatic conditions. Insects are a diverse and globally distributed group of organisms that play fundamental roles in ecosystem processes, many of which are critical to human societies. Despite this, there is growing evidence that …
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Fish Community Assembly in the Forest River, North Dakota, and Resolution of Campostoma Species Presence
… The final aspect of my study was to investigate habitat preferences of fishes in the Forest River. I sampled fish by macrohabitat and compared the results to a similar study. In the determination of the Campostoma species present, I investigated the fishes found in the Red River basin to …
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The influence of spatiotemporal variation in ambient temperature on the ecology and physiology of birds
… ambient temperature regime (vertical niche and habitat association) were not significant predictors of variation in TNZ breadth. My results indicate that temperature variability at the micro- or macro-habitat level is not associated with TNZ breadth in birds, and suggest that the CVH may not …