A hypersaline microbial mat from the Pacific Atoll Kiritimati: insights into composition and carbon fixation using biomarker analyses and a 13C-labeling approach [0.03%]
基于生物标志物分析和¹³C标记的红海滨海盐沼微生物垫碳固定机制研究
S I Bühring,R H Smittenberg,D Sachse et al.
S I Bühring et al.
Modern microbial mats are widely recognized as useful analogs for the study of biogeochemical processes relevant to paleoenvironmental reconstruction in the Precambrian. We combined microscopic observations and investigations of biomarker c...
CaCO3 nucleation by cyanobacteria: laboratory evidence for a passive, surface-induced mechanism [0.03%]
钙化细菌的碳酸盐成核作用：实验支持被动吸附成核机制
M Obst,B Wehrli,M Dittrich
M Obst
Calcite nucleation on the surface of cyanobacteria of the Synechococcus leopoliensis strain PCC 7942 was investigated to assess the influence of photosynthetic uptake of inorganic carbon and active ion exchange processes across the cell mem...
E T Arning,D Birgel,B Brunner et al.
E T Arning et al.
Authigenic phosphatic laminites enclosed in phosphorite crusts from the shelf off Peru (10 degrees 01' S and 10 degrees 24' S) consist of carbonate fluorapatite layers, which contain abundant sulfide minerals including pyrite (FeS(2)) and s...
Biogeochemical changes induced in uranium mining waste pile samples by uranyl nitrate treatments under anaerobic conditions [0.03%]
无氧条件下由硝酸铀酰处理诱导的铀矿山废石样品生化变化
A Geissler,M Merroun,G Geipel et al.
A Geissler et al.
Response of the subsurface soil bacterial community of a uranium mining waste pile to treatments with uranyl nitrate over different periods of time was studied under anaerobic conditions. The fate of the added U(VI) without supplementation ...
CO(2)-forced evolution of plant gas exchange capacity and water-use efficiency over the Phanerozoic [0.03%]
二叠纪以来植物气体交换能力和水分利用效率的二氧化碳驱动演化
P J Franks,D J Beerling
P J Franks
The capacity of plants to fix carbon is ultimately constrained by two core plant attributes: photosynthetic biochemistry and the conductance to CO(2) diffusion from the atmosphere to sites of carboxylation in chloroplasts, predominantly sto...
D J Beerling
D J Beerling
Biological weathering and the long-term carbon cycle: integrating mycorrhizal evolution and function into the current paradigm [0.03%]
生物学风化与长期碳循环：将菌根的演化和功能整合到现有范式中
L L Taylor,J R Leake,J Quirk et al.
L L Taylor et al.
The dramatic decline in atmospheric CO2 evidenced by proxy data during the Devonian (416.0-359.2 Ma) and the gradual decline from the Cretaceous (145.5-65.5 Ma) onwards have been linked to the spread of deeply rooted trees and the rise of a...
The Eocene Arctic Azolla bloom: environmental conditions, productivity and carbon drawdown [0.03%]
古埃塞尼亚极地阿兹olla大爆发：环境条件、生产率及碳固定作用
E N Speelman,M M L Van Kempen,J Barke et al.
E N Speelman et al.
Enormous quantities of the free-floating freshwater fern Azolla grew and reproduced in situ in the Arctic Ocean during the middle Eocene, as was demonstrated by microscopic analysis of microlaminated sediments recovered from the Lomonosov R...
Coevolution of metal availability and nitrogen assimilation in cyanobacteria and algae [0.03%]
蓝藻和藻类中金属可获得性与氮同化协同进化
J B Glass,F Wolfe-Simon,A D Anbar
J B Glass
Marine primary producers adapted over eons to the changing chemistry of the oceans. Because a number of metalloenzymes are necessary for N assimilation, changes in the availability of transition metals posed a particular challenge to the su...
Climate and vegetational regime shifts in the late Paleozoic ice age earth [0.03%]
晚古生代冰室气候期的气候变化与植被更替
W A DiMichele,I P Montañez,C J Poulsen et al.
W A DiMichele et al.
The late Paleozoic earth experienced alternation between glacial and non-glacial climates at multiple temporal scales, accompanied by atmospheric CO2 fluctuations and global warming intervals, often attended by significant vegetational chan...