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Showing 1 to 20 of 33 for “"Guano"”.
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Microbial Ecology of a Bat Guano Community
Guano from the Gray Bat, Myotis griscescens, represents a major nutrient input into cave systems of Southern Missouri. It forms the base of a dynamic community of microflora and microfauna in a controlled environment. The guano community is found in what normally would be considered a nutrient …
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Fertilizer dreams: Peruvian and Chilean culture of the guano and nitrate eras
… the global trade in fertilizer. Focusing on the guano era in Peru (1840s-1870s) and the nitrate era in Chile (1880s-1930s), it demonstrates that the literature of the period is animated by what I call “fertilizer dreams,” that is, the hopes and fears of elites with regards to guano and nitrates. …
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Holocene guano influences on eutrophication and lacustrine ecology at Kettle Lake, North Dakota
… magnesium-ammonium-phosphate mineral formed from guano. I find that 𝛿15N is elevated throughout the Holocene in comparison to other lake sediment records in North America of similar temporal length. In particular, 𝛿15N is highest during periods of struvite deposition and in intervals of drought. …
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Dreyfus frères, Guano and Peruvian government finance, 1869-1880. A chapter in economic imperialism
… contract stipulated that Peru could not use its guano, its only negotiable resource at the time, as a mortgage for any further loans with anyone but Dreyfus. The French syndicate exercised no overt control over Peru, but the fact that Peru's economic well being was dependent on the Syndicate's …
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The value of catch statistics and records of Guano Harvests for managing certain South African Fisheries
… VPA is obtained by analysis of records of guano harvests which are made at a number of islands off the South African coastline. Evidence is presented suggesting that the harvest at Bird Island, Lambert• s Bay is approximately linearly related to pilchard recruitment and these guano harvests …
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The role of penguins in the Recycling of Trace Metals in Antarctica and their Ecological Impact
… axis of this Doctoral Thesis is the study of guano from two Antarctic penguin species, involving a multidisciplinary approach encompassing both the chemical characterisation in terms of dissolved Trace Metals and particulate biogeochemical components, together with the assessment of its …
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Guano Rain and Growing Pain: Co-Nesting Dynamics of Double-Crested Cormorants and Black-Crowned Night-Herons at Tommy Thompson Park
This study investigates the co-nesting dynamics between double-crested cormorants (Nannopterum auritum) and black-crowned night-herons (Nycticorax nycticorax) in Tommy Thompson Park, Toronto, Canada, from 1992 to 2023. Linear mixed models with Bayesian inference were used to examine the impacts of …
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Remote sensing of penguin populations: Development and application of a satellite-based method
… in satellite imagery is based on the red/brown guano stains that colonies create, with these stains evident from space. Fieldwork undertaken in Antarctica (Nov 2014-Jan 2015) using a field spectroradiometer obtained the first in situ hyperspectral reflectance spectra of Adélie and chinstrap …
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Efecto de la aplicación de guano rojo en las propiedades de un suelo de origen volcánico en la Región de Los lagos
… en evaluar los efectos de la aplicación de guano rojo (GR) como enmienda orgánica (EO) en suelos de origen volcánico en la zona sur de Chile, en comparación con la aplicación de guano de pesebrera (GP) comúnmente usado en la zona. El estudio se realizó en tres predios de agricultoras de la …
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Diet of three mormoopid bats (<i>mormoops blainvillei</i>, <i>pteronotus quadridens</i>, and <i>pteronotus portoricensis</i> ) on Puerto Rico
… percent frequency of orders of insects in the guano of the Antillean ghost-faced bat (<i>Mormoops blainvillei</i>), sooty mustached bat (<i>Pteronotus quadridens), and Puerto Rican mustached bat (<i>Pteronotus portoricensis</i>). The most common orders for all three species were Coleoptera, …
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Avian determinants of rocky intertidal community structure in South Africa
… South Africa, support aggregations of seabirds. Guano produced by the seabirds washed off the islands into intertidal and nearshore waters,where it provides a source of inorganic and organic nutrients. The concentrations of nutrients in intertidal rockpools at island and mainland sites in the …
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Structure of an Ensemble of Insectivorous Bats
… differences and did genetic analysis of guano to determine dietary partitioning. Morphology, call structure and flight speeds suggested division into cluttered, edge and open foraging habitats. Species sharing habitats partitioned them in time. I found little dietary overlap among species …
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Biologically induced alternative states in two rocky subtidal benthic communities
… Bay on the west coast of South Africa: Both are guano islands, supporting substantial populations of seabirds. They have a similar bottom topography and experience similar physical conditions. Despite these similarities their subtidal benthic communities are however, radically different. Marcus …
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Larval fish abundance and habitat associations in backwaters and main channel borders of the Kanawha River
… channel border upstream and downstream of Little Guano backwater, and Little Guano Creek backwater, where deep tows (1.5 m deep) were also taken. The 3 shallow water habitats, less than 1 m in depth, sampled by the dropbox included open water over silt substrate, open water over a sand substrate, …
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Maritime resource exploitation in southwest Australia prior to 1901
… for discussion arc whales, seals, seabirds, guano, oysters and pearls, and fish. An argument is developed that the socio-spatial relationship which existed between peoples and marine• estuarine species in the region was determined by the physiography and climate. This relationship has always …
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Soil chemistry and ecology on a restoration trajectory of a coastal sandplain forest, Punakaiki, New Zealand
… hydrological gradient of an alluvial fan, and guano deposition, all of which modified soil P fractionation and secondary iron/aluminium (Fe/Al) minerals. In a glasshouse experiment, soil dehydrogenase activity and biologically based P (CaCl2-P, citrate-P and HCl-P) were significantly increased …
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Ecophysiology and Food Web Dynamics of Spring Ecotone Communities in the Edwards Aquifer, USA
… in systems with ample energy resources (such as guano caves or spring ecotones) may not exhibit reduced metabolic rates. I assessed metabolic and biochemical responses of a subterranean amphipod (Stygobromus pecki) that inhabits spring ecotones and compared these responses to their epigean …
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The nitrate deposits of rock crevices in the Upper Mississippi Valley
… source of the nitrate was organic matter such as guano, scats, urine, carcasses, and plant materials, and that the nitrate accumulated because the cave roof protected the soluble nitrate ion from leaching and by blocking out sunlight, prevented plants from growing and thus extracting this …
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Evaluación de la aplicación de estiércol animal en relación a la presencia, disponibilidad y biodisponibilidad de estrona (E1), 17β-estradiol (E2) y 17α-etinilestradiol (EE2) en suelos degradados
… los residuos de cosecha, poda, estiércol y guano de animales, a través de distintos sistemas de incorporación al suelo. Según la Ley 20.089, el estiércol corresponde a fecas, orinas y productos de cama de animales, que no han sido compostado. El guano y la orina de los animales contienen …
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