Other important factors influencing bird abundances were food availability and events in the migratory and winter periods. |
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Functional group abundance was calculated by summing the abundances of all species in a particular group on a sample date. |
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Of recently naturalized species, some have rapidly changing ranges and rapidly changing local abundances. |
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Based on laboratory measurements of the relative abundances of the three isotopes, researchers infer the contribution of each. |
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Because our survey effort was equal for each transect within a year, summing abundances over migration visits did not lead to spurious results. |
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Hintze gave qualitative estimates of relative species abundances at particular sampling horizons, but did not list total sample sizes. |
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We document relative abundances, habitat preferences, and foraging guilds for the members of the bird community. |
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What if the gas clouds contain different relative abundances of these isotopes? |
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To some extent, the sample sizes reflect the relative abundances of the host species on each island. |
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However, the most extreme discrepancies are factors of 30 or more in the oxygen abundances. |
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Abundances of nine taxa varied significantly among transition zones and interiors of benthoscape elements, most with elevated abundances in transition zones. |
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The cause of some rare aberrant lithium abundances should be cleared up, as well as the effect of binaries. |
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The relative constancy of the isotopic abundances makes it possible to tabulate meaningful average atomic masses for the elements. |
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Errors for noble gas concentrations include experimental uncertainties related to noble gas abundances and blank corrections. |
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The abundances of the noble gases decrease as their atomic numbers increase. |
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Chromite is typically as widespread as Mg-ilmenite, but is generally present in lower abundances. |
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Fresh olivine occurs in abundances of tens of thousands of grains in a 10-kg kimberlite sample. |
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Some of the most important and useful transition elements have very low crustal abundances e.g., tungsten, platinum, gold, and silver. |
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However primitive or advanced a society may have been, it was subject to scarcities and abundances. |
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For up to one month after deposition, detritivore feces contained higher bacterial counts and different abundances of bacterial groups than the surrounding soil in a peat-accumulating wetland. |
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If the two species were then recovered from the fossil record, in the same relative abundances, a similar conclusion might be drawn about winter temperature. |
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From August 2002 through January 2003, the relative abundances of hydrogen, helium, carbon, and oxygen ions recorded by Voyager 1 differed from all previous measurements. |
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We also know their half-lives and can thus determine their relative abundances at the present day, assuming that the isotopes have not been depleted in some way. |
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These data furthermore allow us to assess the relative abundances of different crustal components in the source area from which the sediment was originally derived. |
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The relative abundances are proven to be similar despite a remarkable difference in species composition between the northern and southern subregions. |
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Rich explained the low relative abundances of vultures and other raptorial groups as consistent with the pattern of relatively low representation in modern avifaunas. |
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We thank the many field assistants who have spent long hours censusing and observing birds on our study plots and helping us to understand what determines bird abundances. |
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The declining trend in herring recruitment during the past four years will result in reduced abundances of herring over the next few years. |
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This solves a long-standing problem of identifying the source of Neptune's high stratospheric methane abundances. |
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It is because of these particular abundances that, for the first time, an uranium line is measurable in a stellar spectrum. |
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The equivalent widths are different from one star to another, because the temperatures are different, but lithium abundances are very close. |
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In the diffuse vent flows around the sulphide structures, these abundances can range up to half a million animals per square metre. |
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Jupiter-family comets with depleted volatile abundances in carbon-chain molecules are common. |
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These isotopes are exceedingly rare, having abundances on the order of one million millionth of the corresponding terrestrial element, which is an isotopic ratio far beyond the capabilities of normal mass spectrometers. |
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These samples had higher Pb206 and Pb208 abundances than any other galenas yet examined. |
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Population ecology asks what causes abundances to fluctuate. |
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Most of the argon in Earth's atmosphere has been created by the decay of potassium-40, as the argon-40 abundance is about 1,000 times higher than expected from cosmic abundances. |
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Not much is known about the dinospore stage of Blastodinium and its ability to persist outside of the copepod host in relatively high abundances. |
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Relative abundances of proteobacterial membrane-bound and periplasmic nitrate reductases in selected environments. |
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This resulted in unnaturally high abundances of benthic algae and an associated change in the composition of benthic macroinvertebrate communities. |
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The older lavas are moderately evolved tholeiitic basalts with low abundances of incompatible elements. |
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Reciprocally, abundances of dependent and related predators can change for many reasons, including but not solely because of the availability of the forage species. |
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Historically, the department and the salmon commission, as people who are familiar with that process will know, have always relied on fisheries to determine in-season abundances. |
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There are weak stock issues, but the major runs of interest to the commercial fleet produced huge abundances, probably at or near the average levels of the seventies, eighties, and nineties. |
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Also, maintaining the largest number of spawning populations that are adapted to their individual habitats will result in higher abundances of salmon. |
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Daily fish and zooplankton abundances in the littoral zone of Lake Texoma, Oklahoma-Texas, in relation to abiotic variables. |
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Element abundances vary in natural waters according to the solubility of their source minerals and the availability of surface-active particulates, which remove solutes from solution by adsorption or chemical complexation. |
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In 1938 Norwegian mineralogist Victor Goldschmidt published a detailed summary of data on cosmic abundances of the elements, running over most of the periodic table. |
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A Shannon index was calculated to quantify the equitability of the abundances of faunal groups. |
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In addition to studying the latitudinal spreading of trace consituents such as HCN and CS through the Jovian stratosphere, attempts to determine the C, N, and S isotopic abundances are a focus of recent work. |
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As originally presented, the terms felsic and mafic were used in a broadly descriptive sense to indicate the relative abundances of light-coloured and dark-coloured minerals, respectively, in an igneous rock. |
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The inclusion of Traditional Knowledge helps to provide information on polar bear abundances, movements, behaviours, and provides valuable long term perspective on changes in the population. |
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The presence of fresh olivine and the same relative abundances of indicator minerals in the Peddie kimberlite are found in till overlying and just down-ice from the kimberlite. |
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The initial abundances of gases were altered. |
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Orders Diptera, Acari, and Araneida were abundant on Sapium, while orders such as Thysanoptera, Neuroptera, Orthoptera were present in much lower relative abundances. |
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Compared to arc tholeiites, calc-alkalic magmas have higher abundances of incompatible large ion lithophile elements reflecting enrichment in the mantle wedge source. |
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Random forests for modeling the distribution of tree abundances. |
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We have analyzed Fe 11 absorption lines toward several of the reddened stars included in the FUSE survey of molecular hydrogen abundances in translucent clouds. |
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The new value is also at odds with well-established correlations between deuterium and measured abundances of other elements in stars and the gases between them. |
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Abundances of tuna larvae were determined at both near-reef and oceanic sites around the Hawaiian island of Oahu by Boehlert and Mundy by oblique sampling to 200 m depth. |
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Abundances of wild and hatchery fry were positively correlated in the outer inlet, indicating the formation of mixed schools of hatchery and wild fry. |
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