Field evidence

Michelsen, A., Schmidt, I.K., Jonasson, S., Quarmby, C. and Sleep, D. 1996b Leaf N abundance of subarctic plants provides field evidence that ericoid, ectomycorhizal, and non- and arbus-cular mycorhizal species access different sources of soil nitrogen. Oecologia 105 53-63. 

Hayes, T., Hasten, K., and Tsui, M. et al. (2003). Atrazine-induced hermaphroditism at 0.1 ppb in American leopard frogs (Rana pipiens) Laboratory and field evidence. Environmental Health Perspectives 111, 568-575. 

Kuder T, JT Wilson, P Kaiser, R Kolhatkar, P Philp, J Allen (2005) Enrichment of stable carbon and hydrogen isotopes during anaerobic biodegradation of MTBE microcosm and field evidence. Environ Sci Technol 39 213-220. 

Policy makers would benefit from a combination of strong field evidence of trends and well-established models to draw upon when assessing the benefits of past or future policy decisions. Models of mercury cycling and bioaccumulation are not yet adequately predictive across a range of conditions and landscapes. Results from a national mercury monitoring program, if carefully designed, offer the potential to... 

The phytochemical contents of cultivars of the same species can be significantly different, even within the same field. Evidence for this statement has been given in several recent papers and reviews glucosinolates (Rosa et al., 1997), phenolic compounds (Osier and Lindroth, 2001 Kalt et al., 2001 Howard et al., 2002 Scalzo et al., 2005 Dykes et al., 2005 Pandjaitan et al., 2005 Mpofu et al. 2006) and alkaloids and terpenoids (Theis and Lerdau, 2003). 

Nwankwor Gl, Gillham RW, van der Kamp G, Akindunni FF (1992) Unsaturated and saturated flow in response to pumping of an unconfined aquifer—field evidence of delayed drainage. Ground Water 30 690-700... 

Smee, B.W. 1983. Laboratory and field evidence in support of electrogeochemically enhanced migration of ions through glaciolacustrine sediment. Journal of Geochemical Exploration, 19, 277-304. 

Sillitoe, R.H. Burrows. D.R. 2002. New field evidence bearing on the origin of the EL Laco magnetite deposit, northern Chile. Economic Geology, 97, 1101-1109. 

There is some field evidence for the existence of organic films on the surfaces of particles. For example, Fig. 9.57 shows the results of electron microscopy of haze aerosol collected in Los Angeles (Husar and Shu, 1975). The droplets are wrinkled in appearance, and they suggest this is due to haze aerosol droplets being coated with an organic layer that collapsed when the water in the particle evaporated under vacuum. Husar and Shu propose that the wrinkled appearance is due to a nonvolatile layer of organics that shrunk after water evaporated from the particle during analysis ... 

In some species, male variation in response to component ratio offset from the natural blend is somewhat modulated by ambient temperature (Linn et al, 1988). The response specificity of G. molesta and P. gossypiella to off-ratios of pheromone acetate components in a wind tunnel assay was narrower at 20 °C than at 26 °C. In the field, sexual activity in both species occurs at both of these temperatures, depending on time of year. Some field evidence of this phenomenon with P gossypiella appears in the distribution of catch in traps baited with a range of ratios measured at various times of the flight season. Flint et al. (1977) found an evidently narrower response breadth early in the season (when temperatures were cool) compared with late-season responses. In the omnivorous leafroller Platynota stultana, the optimum ratio of its two components for attraction seems to shift with temperature in the... 

Berry, F. A. F., Hanshaw, B. B., Geologic Field Evidence Suggesting... 

Field Evidence of Biochemical Weathering. PCB congener composition variation with depth in sediment was analyzed for evidence of bio-... 

Pfeifer, H.-R., Gueye-Girardet, A., Reymond, D. et al. (2004) Dispersion of natural arsenic in the Malcantone watershed, southern Switzerland Field evidence for repeated sorption-desorption and oxidation-reduction processes. Geoderma, 122(2-4 SPEC. IIS.), 205-34. 

Recent field evidence indicates that the occurrence of these reaction products may be relatively common in hypoxic groundwaters which have been contaminated by bromoaliphatic compounds. Schwarzenbach et al. (1) reported the presence of a complex mixture of alkyl and chloroalkyl sulfides in a hypoxic groundwater polluted by a variety of bromo- and chloroaliphatic compounds. Ethanethiol (at a concentration of approximately 2 pM) was detected by Jackson et al. (5Q) in groundwater contaminated by a variety of chlorinated and brominated solvents beneath a municipal/industrial landfill. In addition, Watts and Brown (51 cited in 2) have reported the presence of ethanethiol, diethyl disulfide and triethyl disulfide in Florida groundwaters contaminated by 1,2-dibromoethane. 

Bollens, S.M., Frost, B.W., Thoreson, D.S., and Watts, S.J., Diel vertical migration in zooplankton field evidence in support of the predator avoidance hypothesis, Hydrobiologia, 234, 33, 1992. 

Sweatman, H., Field evidence that settling coral reef fish larvae detect resident fishes using dissolved chemical cues, J. Exp. Mar. Bol. Ecol., 14, 163, 1988. 

The result is that barnacles are often the first macrofoulers to colonize a protected surface.100 Once growth of barnacles on toxic metal coatings is initiated, the surface rapidly fails because barnacles act as nontoxic platforms for other organisms. As a result of these kinds of field evidence, the U.S. Navy supported basic barnacle research for almost four decades, and barnacles were the only macrofoulers included in initial studies of natural product antifoulants supported by the U.S. Navy. Most of this work was conducted by the Costlow group at the Duke University Marine Laboratory.47... 

It is regretful that the Lowig papers devoted to organotin compounds were published only during one year41,577-579,586. He then stopped the investigations in this field. Evidently, this was caused by his leaving Zurich for Breslau, where he was invited to take Bunsen s position. 

Hdgberg, M. N., Baath, E., Nordgren, A., Arnebrant, K. Hogberg, P. (2003). Field evidence of opposing effects of nitrogen availability on carbon supply to ectomycorrhizal fungi and decomposers in boreal forest. New Phytologist, 160, 225-38. 

Delocalization of electrons, especially in the outer layer, i. e. valence electrons, must also occur in a magnetic field. Evidence does exist that a stationary magnetic field actually affects some chemical reactions. Turro... 

Not aU field evidence supports the limitation of Trichodesmium diazotrophy by Fe. Both Karl et al. (1997) and Sanudo-Wifriehny et al. (2001) observed that median Fe concentrations <1 nM Fe did not seem to hmit N2 fixation in field collected samples in the subtropical North Pacific Ocean and the Central Adantic. It has been observed that there is no close correlation between total dissolved Fe and Trichodesmium abundance in the North Atlantic Ocean when only open ocean stations are considered, and little difference between total Fe concentrations where Trichodesmium is abundant and where it is scarce (Tyrrell et al., 2003). Moisander et al. (2003) noticed that in the Baltic Sea, Fe addition did not show a significant impact on N2 fixation or biomass production by three other genera of N2-fixing cyanobacteria. 

Xue F., Rowley D. B., and Baker J. (1996) Refolded syn-ultrahigh-pressure thrust sheets in the south Dabie complex, China field evidence and tectonic implications. Geology 24, 455-458. 

Interestingly, Phanerozoic calc-alkaline granites have distinctly higher Mg than those of the Archean. This could reflect the presence of a juvenile mantle-derived component in the younger plutons, since, in contrast to the Archean, there is abundant field evidence for the involvement of such material in Phanerozoic granite genesis (see below). 

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