Status of Trichoferus campestris invasion (Faldermann, 1835) internationally and réflexionon its first interceeption in Belgium (Coleoptera, Cerambycidae, Cerambycinae, Hesperophanini)

peer reviewedPlusieurs interceptions ou signalements inédits d’un cérambycide d’origine asiatique, Trichoferus campestris (Faldermann, 1835), ont été effectués très récemment en Europe, notamment en France et pour la première fois en Belgique. L’établissement de cette espèce envahissante a déjà été constaté dans plusieurs pays européens ainsi qu’au Canada et aux États-Unis. Une synthèse des informations géographiques, biologiques et comportementales, ainsi qu’une liste des plantes hôtes de T. campestris, sont données. Le contexte de son interception en Belgique est exposé et discuté plus largement.Several interceptions or new reports of a cerambycid of Asian origin, Trichoferus campestris (Faldermann, 1835), have been made very recently in Europe, particularly in France and for the first time in Belgium. The establishment of this invasive species has already been observed in several European countries as well as in Canada and the United States. A summary of geographical, biological and behavioral information, as well as a list of host plants of T. campestris, are given. The context of its interception in Belgium is exposed and discussed more widely

Influence de la température sur la première transition électronique pure du diméthyl-2,6 naphtalène

De 4 à 50 °K les premières raies d’absorption du diméthyl-2,6 naphtalène s’élargissent sans se déplacer. Néanmoins le centre de gravité de la première bande large se déplace vers le visible du fait d’un élargissement dissymétrique. La largeur de la raie ν’ = 31 170 cm-1, correspondant au niveau n = 7 de la série hydrogénoïde observée, évolue conformément aux prévisions de la théorie dans le cas du faible couplage exciton-phonon

Evidence for a Volcanic Cooling Signal in a 335-Year Coral Record from New Caledonia

Although volcanic cooling events have been detected in tree ring records, their occurrence in marine records has received much less attention, Herein we report results from a 335-year oxygen isotope record (1657-1992) from a New Caredonia coral indicating that as many as 16 interannual-scale cooling events occur within 1 year of a volcanic eruption as determined by ice core records, There are also pentadal/decadal-scale cooling events beginning in 1675, 1813, and 1903 that immediately postdate volcanic eruptions. However, the interannual correspondences are complicated by the fact that some of the cooling events also coincide with El Ninos, which cause cooling in this part of the western South Pacific. If our conclusions are substantiated by further work, occurrence of distinct volcanic cooling signals may enable refinement of coral chronologies by use of the \u27\u27event stratigraphic\u27\u27 approach, with the most promising correlation horizons being associated with the following eruptions. 1808 (unknown); 1813-1821 (several eruptions), 1835 (Coseguina), 1883 (Krakatau), and possibly 1963 (Agung)

A Multicentury Stable Isotope Record from a New Caledonia Coral: Interannual and Decadal Sea Surface Temperature Variability in the Southwest Pacific Since 1657 AD

A 335 year stable isotope record from a New Caledonia coral (22°S, 166°E) helps fill a large gap in historical climate reconstructions. Although the long‐term coral δ18O‐based sea surface temperature (SST) trend is one of warming, there are notable decadal fluctuations, especially in the early 18th and early 19th centuries. Mean annual SSTs between 1658 and 1900 are estimated to be ∼0.3°C lower than the 20th century average, with interdecadal excursions of 0.5°–0.8°C. Time series analyses of the coral isotope record reveals significant concentrations of variance in the El Niño band; an inderdecadal spectral peak is present, but its robustness requires additional statistical evaluation. A secular but irregular decrease in coral δ13C values begins in the mid‐1800s and may reflect the anthropogenic perturbation of the carbon reservoir. These and other results indicate that the New Caledonia coral isotope record is a valuable source of information on southwest Pacific climate history

Stable isotopic composition of Poritres lutea from New Caledonia

A 335 year stable isotope record from a New Caledonia coral (22°S, 166°E) helps fill a large gap in historical climate reconstructions. Although the long-term coral s18O-based sea surface temperature (SST) trend is one of warming, there are notable decadal fluctuations, especially in the early 18th and early 19th centuries. Mean annual SSTs between 1658 and 1900 are estimated to be ~0.3°C lower than the 20th century average, with interdecadal excursions of 0.5°-0.8°C. Time series analyses of the coral isotope record reveals significant concentrations of variance in the El Niño band; an inderdecadal spectral peak is present, but its robustness requires additional statistical evaluation. A secular but irregular decrease in coral d13C values begins in the mid-1800s and may reflect the anthropogenic perturbation of the carbon reservoir. These and other results indicate that the New Caledonia coral isotope record is a valuable source of information on southwest Pacific climate history

A Multicentury Stable Isotope Record from a New Caledonia Coral: Interannual and Decadal Sea Surface Temperature Variability in the Southwest Pacific Since 1657 AD

A 335 year stable isotope record from a New Caledonia coral (22°S, 166°E) helps fill a large gap in historical climate reconstructions. Although the long‐term coral δ18O‐based sea surface temperature (SST) trend is one of warming, there are notable decadal fluctuations, especially in the early 18th and early 19th centuries. Mean annual SSTs between 1658 and 1900 are estimated to be ∼0.3°C lower than the 20th century average, with interdecadal excursions of 0.5°–0.8°C. Time series analyses of the coral isotope record reveals significant concentrations of variance in the El Niño band; an inderdecadal spectral peak is present, but its robustness requires additional statistical evaluation. A secular but irregular decrease in coral δ13C values begins in the mid‐1800s and may reflect the anthropogenic perturbation of the carbon reservoir. These and other results indicate that the New Caledonia coral isotope record is a valuable source of information on southwest Pacific climate history