Whiting events: biogenic origin due to the photosynthetic activity of cyanobacterial picoplankton [0.03%]
白点事件：由于原绿球细菌的光合作用引起的生物原因
J B Thompson,S Schultze-Lam,T J Beveridge et al.
J B Thompson et al.
An annual whiting event occurs each year in late May to early June in Fayetteville Green Lake, New York. The initiation of this event correlates with exponential growth of the Synechococcus population within the lake. Synechococcus is the d...
Pathways of carbon oxidation in continental margin sediments off central Chile [0.03%]
中智沿海地区大陆边缘沉积物碳氧化途径
B Thamdrup,D E Canfield
B Thamdrup
Rates and oxidative pathways of organic carbon mineralization were determined in sediments at six stations on the shelf and slope off Concepcion Bay at 36.5 degrees S. The depth distribution of C oxidation rates was determined to 10 cm from...
Optical properties of benthic photosynthetic communities: fiber-optic studies of cyanobacterial mats [0.03%]
水生光合群体的光学性质：丝状光学法研究蓝藻菌毡
B B Jorgensen,D J Des Marais
B B Jorgensen
A fiber-optic microphobe was used to analyze the spectral light gradients in benthic cyanobacterial mats with 50-micrometer depth resolution and 10-nm spectral resolution. Microcoleus chthononplastes mats were collected from hypersaline, co...
Sources of carbon and sulfur nutrition for consumers in three meromictic lakes of New York State [0.03%]
纽约州三个垂直分层湖泊中消费者碳和硫营养的来源分析
B Fry
B Fry
The trophic importance of bacterioplankton as a source of carbon and sulfur nutrition for consumers in meromictic lakes was tested using stable carbon (delta 13C) and sulfur (delta 34S) isotopic measurements. Studies in three lakes near Syr...
R A Wharton Jr,M A Meyer,C P McKay et al.
R A Wharton Jr et al.
Perennially ice-covered lakes are found in the McMurdo Dry Valleys of southern Victoria Land, Antarctica. In contrast to temperate lakes that have diurnal photic periods, antarctic (and arctic) lakes have a yearly photic period. An unusual ...
Microscale characterization of dissolved organic matter production and uptake in marine microbial mat communities [0.03%]
海洋微生物垫群落溶解有机质产生和摄取的微尺度特征分析研究
H W Paerl,B M Bebout,S B Joye et al.
H W Paerl et al.
Intertidal marine microbial mats exhibited biologically mediated uptake of low molecular weight dissolved organic matter (DOM), including D-glucose, acetate, and an L-amino acid mixture at trace concentrations. Uptake of all compounds occur...
The diffusive boundary layer of sediments: oxygen microgradients over a microbial mat [0.03%]
沉积物的扩散边界层：微生物垫上的氧微梯度
B B Jorgensen,D J Des Marais
B B Jorgensen
Oxygen microelectrodes were used to analyze the distribution of the diffusive boundary layer (DBL) at the sediment-water interface in relation to surface topography and flow velocity. The sediment, collected from saline ponds, was covered b...
Manganese oxidation in pH and O2 microenvironments produced by phytoplankton [0.03%]
由浮游植物产生的pH和O₂微环境中的锰氧化作用
L L Richardson,C Aguilar,K H Nealson
L L Richardson
Pure cultures of Chlorella sp. catalyzed the oxidation of soluble Mn(II) to particulate, extracellular, manganic oxides. Manganese oxidation was dependent on photosynthetic activity: no oxidation was observed in the dark when cells were gro...
Diploptene: an indicator of terrigenous organic carbon in Washington coastal sediments [0.03%]
角二醇：华盛顿沿海沉积物中陆源有机碳的指示剂
F G Prahl,J M Hayes,Xie T-M
F G Prahl
The pentacyclic triterpene 17 beta(H),21 beta(H)-hop-22(29)-ene (diploptene) occurs in sediments throughout the Columbia River drainage basin and off the southern coast of Washington state in concentrations comparable to long-chain plantwax...