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A new species in the genus Ropalophorus Curtis (Hymenoptera: Braconidae) from China, parasitizing adults of the bark beetle Ips subelongatus (Coleoptera: Scolytidae), with a key to world species of the genus Naturalis
Yang, Z.; Gu, Y.; Song, Y..
A new species of the genus Ropalophorus Curtis (Hymenoptera: Braconidae: Euphorinae) from Palaearctic China is described and illustrated. A key to world species is added.
Tipo: Article / Letter to the editor Palavras-chave: Hymenoptera; Braconidae; Euphorinae; Ropalophorus; Coleoptera; Curculionidae; Scolytinae; Ips; Larix; Distribution; World; China; New species; 42.75.
Ano: 2003 URL: http://www.repository.naturalis.nl/record/216174
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Climatically driven emissions of hydrocarbons from marine sediments during deglaciation ArchiMer
Hill, T. M.; Kennett, J. P.; Valentine, D. L.; Yang, Z.; Reddy, C. M.; Nelson, R. K.; Behl, R. J.; Robert, C.; Beaufort, L..
Marine hydrocarbon seepage emits oil and gas, including methane (approximate to 30 Tg of CH4 per year), to the ocean and atmosphere. Sediments from the California margin contain preserved tar, primarily formed through hydrocarbon weathering at the sea surface. We present a record of variation in the abundance of tar in sediments for the past 32,000 years, providing evidence for increases in hydrocarbon emissions before and during Termination IA [16,000 years ago (16 ka) to 14 ka] and again over Termination IB (11-10 ka). Our study provides direct evidence for increased hydrocarbon seepage associated with deglacial warming through tar abundance in marine sediments, independent of previous geochemical proxies. Climate-sensitive gas hydrates may modulate...
Tipo: Text Palavras-chave: Methane; Paleoclimate; Quaternary climate; Hydrate; Tar.
Ano: 2006 URL: https://archimer.ifremer.fr/doc/00234/34524/33432.pdf
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