搜索结果: 46-54 共查到“理学 Alaska”相关记录54条 . 查询时间(0.093 秒)
Microzooplankton grazing in the coastal Gulf of Alaska: Variations in top-down control of phytoplankton
Microzooplankton grazing coastal Gulf of Alaska Variations top-down contro phytoplankton
2014/4/22
Microzooplankton grazing rates on three phytoplankton size fractions (<5, 5-20, and >20 μm) were measured during spring and summer 2001 in the northern coastal Gulf of Alaska (CGOA). To a first approx...
Variable effects of marine-derived nutrients on algal production in salmon nursery lakes of Alaska during the past 300 years
marine-derived nutrients algal production salmon nursery lakes Alaska during the past 300 years
2014/4/22
We measured historical changes in sedimentary δ15N and fossil pigments in four lakes with anadromous semelparous salmon and two reference lakes to quantify the degree to which the flux of marine-deriv...
The physicochemical speciation of dissolved iron in the Bering Sea, Alaska
physicochemical speciation dissolved iron
2014/4/22
The physicochemical speciation of dissolved iron (Fe) across natural dissolved Fe gradients in the oceanic
and shelf domains of the southeastern Bering Sea was examined in surface and subsurface samp...
North to Alaska: Evidence for conveyor belt transport of Dungeness crab larvae along the west coast of the United States and Canada
North to Alaska: Evidence conveyor belt transport Dungeness crab larvae west coast United States and Canada
2014/4/22
We propose and evaluate the hypothesis that Dungeness crab (Cancer magister) larvae from the northwestern coast of the United States and Canada can be transported northward to southeastern Alaska. Lar...
In Arctic Alaska, the Warming Climate Threatens an Ancient Culture（图）
Arctic Warming Climate Ancient Culture
2006/12/15
SHISHMAREF, Alaska—Over the past 10 years, while much of the United States has debated the potential threat of global climate change, nearly 600 residents of this remote island village have seen its e...
Responses in dissolved nutrients and epilithon abundance to spawning salmon in Southeast Alaska streams
dissolved nutrients epilithon abundance spawning salmon Southeast Alaska streams
2014/5/8
Spawning Pacific salmon (Oncorhynchus spp.) historically transported massive quantities of marine-derived nutrients (MDN) into nutrient-poor streams of the Pacific Northwest. In southeast Alaska, we m...
Mineral Assemblages of Volcanic and Detrital Partings in Tertiary Coal Beds, Kenai Peninsula, Alaska
Chlorite Coal partings Crandallite Illite Kaolinite Opal-CT Smectite Volcanic ash
2011/11/30
Abstract: Volcanic and non-volcanic partings are exposed in coal beds of the Tertiary Beluga and Sterling Formations along the shores of the Kenai lowland, Alaska. About two-thirds of the partings ori...
Natural Ammonium Illites from Black Shales Hosting a Stratiform Base Metal Deposit, DeLong Mountains, Northern Alaska
Ammonium Black shale Illite Infrared spectroscopy Nitrogen X-ray powder diffraction
2012/2/7
Naturally occurring ammonium illites have been discovered in black shales surrounding a stratiform base metal deposit in the DeLong Mountains, northern Alaska. Infrared spectra of the samples exhibit ...
ORIGIN OF THE ULTRAMAFIC COMPLEX AT DUKE ISLAND, SOUTHEASTERN ALASKA
THE ULTRAMAFIC COMPLEX DUKE ISLAND SOUTHEASTERN ALASKA
2014/4/8
The Duke Island ultramafic complex crops out in two areas that total 9 square miles. Rocks within the complex are comprised of olivine, clinopyroxene, hornblende and ferriferous oxides and are classif...