Mesocosm bloom experiment results with the coccolithophore Emiliania huxleyi

We investigated the effect of CO2 and primary production on the carbon isotopic fractionation of alkenones and particulate organic matter (POC) during a natural phytoplankton bloom dominated by the coccolithophore Emiliania huxleyi. In nine semi-closed mesocosms (~11 m**3 each), three different CO2 partial pressures (pCO2) in triplicate represented glacial (~180 ppmv CO2), present (380 ppmv CO2), and year 2100 (~710 ppmv CO2) CO2 conditions. The largest shift in alkenone isotopic composition (4-5 per mil) occurred during the exponential growth phase, regardless of the CO2 concentration in the respective treatment. Despite the difference of ~500 ppmv, the influence of pCO2 on isotopic fractionation was marginal (1-2 per mil). During the stationary phase, E. huxleyi continued to produce alkenones, accumulating cellular concentrations almost four times higher than those of exponentially dividing cells. Our isotope data indicate that, while alkenone production was maintained, the interaction of carbon source and cellular uptake dynamics by E. huxleyi reached a steady state. During stationary phase, we further observed a remarkable increase in the difference between d13C of bulk organic matter and of alkenones spanning 7-12 per mil. We suggest that this phenomenon is caused mainly by a combination of extracellular release of 13C-enriched polysaccharides and subsequent particle aggregation induced by the production of transparent exopolymer particles (TEP).

Illegal aliens. : Hearings, Ninety-second Congress, first session.

"Serial no. 13."

The gardeners labyrinth, or, A new art of gardening : wherein is laid down new and rare inventions and secrets of gardening not heretofore known : for sowing, planting, and setting all manner of roots, herbs, and flowers, both for the use of the kitchen garden, and a garden of pleasure ... /

"Reprinted for the first time since the edition dated 1652, from the copy now owned by Mrs. Rosetta E. Clarkson."--T.p. verso.

Tractatus posthumus Jani Jacobi Boissardi Vesuntini De divinatione & magicis praestigiis : quarum veritas ac vanitas solidè exponitur per descriptionem deorum fatidicorum qui olim responsa dederunt : eorundemque prophetarum, sacerdotum, phoebadum, sybyllarum & divinorum, qui priscis temporibus celebres oraculis exstiterunt ; adjunctis simul omnium effigiebus, ab ipso autore e gemmis, marmoribus, tabulisq[ue] antiquis ad vivum delineatus : jam modo eleganter aeri incisis per Joh. Theodor. de Bry ...

Includes errata, last p.

Hispaniae schola musica sacra. : Opera varia (saecul. XV, XVI, XVII et XVIII) /

The prefaces, biographical introductions, analytical notes and bibliographies are in Spanish and French.

Ḥabīb-i siyar jild al-thānī, [1026, i.e. 1617].

This is the second of three volumes which comprise Khvandemīr's well known and important general history, completed in 929/1523, which spans the creation of the world up to the death of Shah Ismāʻīl Safavī I. The work includes particularly detailed information about Herat under Sultan Husayn Bayqara, the last Timurid ruler in Herat, as well as Shah Ismāʻīl and Bābur's life. This work has been published in both Persian and English editions.

Reorganization plan no. 1 of 1950 : providing for reorganizations in the Department of the Treasury : report, together with the minority views (to accompany S. Res. 246)

Also in Congressional serial volume 11368.

The Burghley Nef

1 ft. 1 45/64 in.x 8 3/16 in.x 4 51/64 in.; nautilus shell with parcel-gilt silver mounts, raised, chased, engraved and cast, and pearls.

The Burghley Nef: close view

nautilus shell with parcel-gilt silver mounts, raised, chased, engraved and cast, and pearls.

Juan de Garay y su retrato /

Includes bibliographical references.

The constant captain, Gonzalo de Sandoval.

Includes bibliography.