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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 81 for “"shrubland"”.
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Pattern and process at a desert grassland-shrubland ecotone
… on pattern and process at a desert grassland-shrubland ecotone. First, small-scale species coexistence patterns in microsites around dominant grasses (B. eriopoda) and shrubs (L. tridentata) were compared. Second, small-scale patterns were related to landscape scale species richness. Third, a …
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Comparative reproductive biology of co-occurring endangered and common shrubland birds
… and white-eyed vireos. I studied vireos in shrublands and woodlands in central Texas, USA in 2013 and 2014. I used point count surveys (n = 256) and nest monitoring (n = 145) to determine arrival dates, settlement patterns, nest site selection, and, ultimately, nest survival relative to …
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Impacts of non-renewable resource extraction on shrubland songbird nest success and abundance
Shrubland songbirds are a highly imperiled guild across much of North America due to wide-scale land use changes and resulting loss of shrubland habitat. Land management practices which produce early-successional habitat, namely field abandonment and clearcut timber harvests, have become …
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Ecology and Conservation of Shrubland Bird Communities in the Eastern Ghats of Indi
… I studied the habitat usage and preferences of Shrubland birds in the Eastern Ghats of India during the pre-monsoon and post monsoon seasons. Eastern Ghats show a marked difference from pre-monsoon season to post-monsoon season thereby affecting the habitat use by birds depending upon various …
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Effects of non-native woody plant species on shrubland birds of conservation concern
Shrubland birds are among the fastest declining groups of birds over the past 50 years. Habitat loss and degradation are proposed as being major drivers, but the underlying causes of these declines are unknown. I investigated some of the potential factors driving population declines in three …
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Influence of vegetation structure and landscape context on the occupancy of shrubland birds
Limited Restriction Lifted for Item 109948 on 2021-02-09T10:15:34Z.
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Ecology of feral cats Felis catus and their prey in relation to shrubland fire regimes
… such as fire. I examined how the fire history of shrublands influences the ecology of feral cats Felis catus, dingoes Canis dingo and their prey species in Western Australia’s northern Wheatbelt region. A review of the literature revealed that feral cats inhabit a diverse range of ecosystems …
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Nesting ecology and conservation of shrubland birds in a fragmented urbanized landscape in northeastern Illinois
Current declines in shrubland bird populations and habitats in eastern North America highlight the importance of understanding the nesting ecology of shrubland birds. The majority of the literature on shrubland birds has focused on communities in regenerating forest areas following silvicultural …
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Practices combining fire and grazing in the Central U.S. reduce woody encroachment and accommodate grassland and shrubland birds
Temperate grasslands and shrublands are critically endangered ecosystems receiving almost no protection, as nearly 50% of their global area has been lost and less than 5% has been set aside in reserves. To further complicate matters, in many instances these are alternate states of the same system, …
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High elephant impact is capable of converting tall mopane woodland to shrubland in the South East Lowveld of Zimbabwe
… completely converting tall mopane woodlands to shrublands. This is likely to have indirect effects on the ecosystem functioning and diversity of these areas as well as tourism, and is consequently of concern for local management. Continued monitoring of these woodlands and management of elephant …
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Spatio-temporal distribution of grass and shrubs at the ecotone between an arid grassland and succulent shrubland : ecological interactions and the influence of soils
… vegetation at an ecotone between the Namaqualand shrublands and Bushmanland arid grassland at the climatic transition between the predominantly winter rainfall Succulent Karoo and the predominantly summer rainfall Nama-Karoo biomess. The work focused on the determinants of grass and succulent …
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Assessing Rodent Species Counts and Diversity in the Not-Grazed Montana De Oro State Park and the Rotationally Grazed Pecho Ranch
… among three plant community types (grassland, shrubland, grass-shrub mix), managed with or without grazing. We used Sherman live traps over a total of eight trapping sessions. We totaled 486 trapnights for each of the six plant community and grazing management combinations. The three plant …
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Climatic change, habitat modification and relative age of dung beetle taxa (Coleoptera: Scarabaeidae, Hydrophilidae, Histeridae, Staphylinidae) in the South-Western Cape
… from low, dense pasture to taller sparser shrubland; The five pasture sites were distributed between all three subregions whereas the six shrubland sites were located only in the Cape of Good Hope Peninsula and on the west coastal belt. 3. Pitfall traps baited with cattle dung were used to …
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ΒΟΤΑΝΙΚΗ ΣΥΝΘΕΣΗ ΚΑΙ ΘΡΕΠΤΙΚΗ ΑΞΙΑ ΤΗΣ ΤΡΟΦΗΣ ΤΩΝ ΓΙΔΙΩΝ ΠΟΥ ΒΟΣΚΟΥΝ ΣΕ ΘΑΜΝΟΛΙΒΑΔΑ ΜΕ ΔΙΑΦΟΡΕΤΙΚΗ ΑΝΑΛΟΓΙΑ ΣΕ ΘΑΜΝΩΔΗ ΚΑΙ ΠΟΩΔΗ ΦΥΤΑ
… VALUE OF GOAT DIETS WAS STUDIED IN THREESHRUBLANDS. THE DENSITIES OF THE THREE SHRUBLANDS WERE AS FOLLOWS: >(A) 53% SHRUB, 31% HERBAGE, (B) 60% SHRUB, 21% HERBAGE AND (C) 66% SHRUB, 11% HERBAGE COVER. ESOPHAGEAL FISTULA AND HAND PLUCKING METHODS WERE USED TO OBTAIN SAMPLES OFTHE GOAT'S …
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The adaptive geometrey {i.e. geometry} of savanna trees : a comparative study of the architecture and life history of Acacia karroo Hayne. in savanna, forest, and arid karoo shrubland environments
… South Africa: forest (Cape Vidal, Natal), arid shrubland (Prince Albert, karoo) and savanna (Hluhluwe-Umfolozi Game reserve and ltala Game reserve, Natal). I aimed to elucidate on the distinctive characteristics required for trees to survive in savannas. The combination of frequent fires and …
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Holocene vegetation history and environmental change in the forest-grassland mosaic of the Central Highlands of Madagascar
… extent in a matrix of open grassland and ericoid shrubland vegetation, at least from the Early and Mid-Holocene to ca. 1000 cal years BP, driven mainly by climate variability and fire occurrence. In Tampoketsa-Ankazobe wetland (eastern slopes), the vegetation was characterised by a mosaic of …
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Management of critically endangered renosterveld fragments in the Overberg, South Africa
… altered the system from a grassland to a shrubland. The debate over what renosterveld actually is, combined with a dearth of knowledge as to its ecological functioning, has meant that management recommendations are largely based on a combination of guess-work and inferences from studies in …
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The effects of grass invasion and fire severity on Acacia koa regeneration
… woodland, montane woodland, and montane shrubland). We visually estimated pre-fire exotic grass cover from oblique aerial imagery taken in 2014 and evaluated those estimates with in situ data from 60 transects of the same cover types that did not burn in the Keauhou Ranch Fire. We …
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Long-term Vegetation Change Before and After Converting from Livestock farming to Game Ranching in Asante Sana Game Reserve, South Africa
… over time at the expense of Grassland and Shrubland while Bare-ground has expanded into Shrubland and Thicket. A ground-truthing exercise revealed a significant (p<0.01, R2 = 0.6) positive relationship between the vegetation cover estimated on the ground and satellite derived SAVI values, …
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