当前位置： SCI文献检索 > PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA期刊下所有文献 > Predictable and efficient carbon sequestration in the North Pacific Ocean supported by symbiotic nitrogen fixation.

Predictable and efficient carbon sequestration in the North Pacific Ocean supported by symbiotic nitrogen fixation.

Abstract：

:The atmospheric and deep sea reservoirs of carbon dioxide are linked via physical, chemical, and biological processes. The last of these include photosynthesis, particle settling, and organic matter remineralization, and are collectively termed the "biological carbon pump." Herein, we present results from a 13-y (1992-2004) sediment trap experiment conducted in the permanently oligotrophic North Pacific Subtropical Gyre that document a large, rapid, and predictable summertime (July 15-August 15) pulse in particulate matter export to the deep sea (4,000 m). Peak daily fluxes of particulate matter during the summer export pulse (SEP) average 408, 283, 24.1, 1.1, and 67.5 μmol·m(-2)·d(-1) for total carbon, organic carbon, nitrogen, phosphorus (PP), and biogenic silica, respectively. The SEP is approximately threefold greater than mean wintertime particle fluxes and fuels more efficient carbon sequestration because of low remineralization during downward transit that leads to elevated total carbon/PP and organic carbon/PP particle stoichiometry (371:1 and 250:1, respectively). Our long-term observations suggest that seasonal changes in the microbial assemblage, namely, summertime increases in the biomass and productivity of symbiotic nitrogen-fixing cyanobacteria in association with diatoms, are the main cause of the prominent SEP. The recurrent SEP is enigmatic because it is focused in time despite the absence of any obvious predictable stimulus or habitat condition. We hypothesize that changes in day length (photoperiodism) may be an important environmental cue to initiate aggregation and subsequent export of organic matter to the deep sea.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Karl DM,Church MJ,Dore JE,Letelier RM,Mahaffey C

doi

10.1073/pnas.1120312109

subject

Has Abstract

pub_date

2012-02-07 00:00:00

pages

1842-9

issue

6

eissn

0027-8424

issn

1091-6490

pii

1120312109

journal_volume

109

pub_type

杂志文章

相关文献

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA文献大全
  • Phosphorylation of actin Tyr-53 inhibits filament nucleation and elongation and destabilizes filaments.

    abstract：:Dictyostelium actin was shown to become phosphorylated on Tyr-53 late in the developmental cycle and when cells in the amoeboid stage are subjected to stress but the phosphorylated actin had not been purified and characterized. We have separated phosphorylated and unphosphorylated actin and shown that Tyr-53 phosphory...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0606321103

    authors： Liu X,Shu S,Hong MS,Levine RL,Korn ED

    更新日期：2006-09-12 00:00:00

  • Three-dimensional biomimetic vascular model reveals a RhoA, Rac1, and N-cadherin balance in mural cell-endothelial cell-regulated barrier function.

    abstract：:The integrity of the endothelial barrier between circulating blood and tissue is important for blood vessel function and, ultimately, for organ homeostasis. Here, we developed a vessel-on-a-chip with perfused endothelialized channels lined with human bone marrow stromal cells, which adopt a mural cell-like phenotype t...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1618333114

    authors： Alimperti S,Mirabella T,Bajaj V,Polacheck W,Pirone DM,Duffield J,Eyckmans J,Assoian RK,Chen CS

    更新日期：2017-08-15 00:00:00

  • Preferences in a trait decision determined by transcription factor variants.

    abstract：:Few mechanisms are known that explain how transcription factors can adjust phenotypic outputs to accommodate differing environments. In Saccharomyces cerevisiae, the decision to mate or invade relies on environmental cues that converge on a shared transcription factor, Ste12. Specificity toward invasion occurs via Ste...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1805882115

    authors： Dorrity MW,Cuperus JT,Carlisle JA,Fields S,Queitsch C

    更新日期：2018-08-21 00:00:00

  • Cation-dependent mannose 6-phosphate receptor contains two internalization signals in its cytoplasmic domain.

    abstract：:The signals required for rapid internalization of the bovine cation-dependent mannose 6-phosphate receptor have been localized to two distinct regions of the 67-amino acid cytoplasmic domain. One signal includes phenylalanine 13 and phenylalanine 18, while the other involves tyrosine 45. The former signal is more pote...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.87.24.10010

    authors： Johnson KF,Chan W,Kornfeld S

    更新日期：1990-12-01 00:00:00

  • Heat stress causes inhibition of the de novo synthesis of antenna proteins and photobleaching in cultured Symbiodinium.

    abstract：:Coral bleaching, caused by heat stress, is accompanied by the light-induced loss of photosynthetic pigments in in situ symbiotic dinoflagellate algae (Symbiodinium spp.). However, the molecular mechanisms responsible for pigment loss are poorly understood. Here, we show that moderate heat stress causes photobleaching ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0708554105

    authors： Takahashi S,Whitney S,Itoh S,Maruyama T,Badger M

    更新日期：2008-03-18 00:00:00

  • Induction of specific clonal anergy in human T lymphocytes by Staphylococcus aureus enterotoxins.

    abstract：:The exotoxins produced by certain strains of Staphylococcus aureus are able to stimulate powerful polyclonal proliferative responses and to induce nonresponsiveness by clonal deletion of T lymphocytes expressing the appropriate T-cell antigen receptor V beta gene products. This paper examines the ability of S. aureus ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.87.22.8884

    authors： O'Hehir RE,Lamb JR

    更新日期：1990-11-01 00:00:00

  • Inhibition of EBV-mediated membrane fusion by anti-gHgL antibodies.

    abstract：:Herpesvirus entry into cells requires the coordinated action of multiple virus envelope glycoproteins, including gH, gL, and gB. For EBV, the gp42 protein assembles into complexes with gHgL heterodimers and binds HLA class II to activate gB-mediated membrane fusion with B cells. EBV tropism is dictated by gp42 levels ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1704661114

    authors： Sathiyamoorthy K,Jiang J,Möhl BS,Chen J,Zhou ZH,Longnecker R,Jardetzky TS

    更新日期：2017-10-10 00:00:00

  • Genetic regulatory mechanisms and the ecological niche of Escherichia coli.

    abstract：:Whether the regulatory protein of an inducible operon for a catabolic pathway is a positive or a negative element in the control of expression is correlated with the frequent or infrequent presence, respectively, of the system's substrate in the natural environment. ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.71.6.2453

    authors： Savageau MA

    更新日期：1974-06-01 00:00:00

  • Quorum size of Pseudomonas syringae is small and dictated by water availability on the leaf surface.

    abstract：:The paradigm of bacterial quorum sensing (QS), which mediates cell-density-dependent gene expression, usually has been studied in high-cell-density planktonic liquid cultures or in biofilms in which signal concentrations accumulate to sufficiently high levels to induce QS. Presumably under conditions with restricted d...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0711723105

    authors： Dulla G,Lindow SE

    更新日期：2008-02-26 00:00:00

  • Painting of fourth, a chromosome-specific protein in Drosophila.

    abstract：:Chromosome-specific gene regulation is known thus far only as a mechanism to equalize the transcriptional activity of the single male X chromosome with that of the two female X chromosomes. In Drosophila melanogaster, a complex including the five Male-Specific Lethal (MSL) proteins, "paints" the male X chromosome, med...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.111581298

    authors： Larsson J,Chen JD,Rasheva V,Rasmuson-Lestander A,Pirrotta V

    更新日期：2001-05-22 00:00:00

  • Specific binding of leukotriene C4 to ileal segments and subcellular fractions of ileal smooth muscle cells.

    abstract：:A specific high-affinity receptor for leukotriene C4 (LTC4) has been identified on segments of longitudinal smooth muscle from guinea pig ileum, in disrupted cells obtained from the ileal segments, and in subcellular fractions enriched for mitochondrial membranes and plasma membranes, respectively. Specific [3H]LTC4 b...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.81.14.4529

    authors： Krilis S,Lewis RA,Corey EJ,Austen KF

    更新日期：1984-07-01 00:00:00

  • Global ensemble projections reveal trophic amplification of ocean biomass declines with climate change.

    abstract：:While the physical dimensions of climate change are now routinely assessed through multimodel intercomparisons, projected impacts on the global ocean ecosystem generally rely on individual models with a specific set of assumptions. To address these single-model limitations, we present standardized ensemble projections...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1900194116

    authors： Lotze HK,Tittensor DP,Bryndum-Buchholz A,Eddy TD,Cheung WWL,Galbraith ED,Barange M,Barrier N,Bianchi D,Blanchard JL,Bopp L,Büchner M,Bulman CM,Carozza DA,Christensen V,Coll M,Dunne JP,Fulton EA,Jennings S,Jones MC,

    更新日期：2019-06-25 00:00:00

  • Hormonal regulation of cytodifferentiation and intercellular communication in cultured granulosa cells.

    abstract：:Granulosa cells from immature hypophysectomized diethylstilbestrol-treated rats displayed pronounced intracellular and intercellular changes after 48 hr of exposure to follicle-stimulating hormone (FSH) in vitro. As determined by light and electron microscopy, most of the FSH-treated cells became highly aggregated and...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.78.5.3000

    authors： Amsterdam A,Knecht M,Catt KJ

    更新日期：1981-05-01 00:00:00

  • Statistical methods for characterizing similarities and differences between semantic structures.

    abstract：:This paper describes a variety of statistical methods for obtaining precise quantitative estimates of the similarities and differences in the structures of semantic domains in different languages. The methods include comparing mean correlations within and between groups, principal components analysis of interspeaker c...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.97.1.518

    authors： Romney AK,Moore CC,Batchelder WH,Hsia TL

    更新日期：2000-01-04 00:00:00

  • Structural effects of quinacrine binding in the open channel of the acetylcholine receptor.

    abstract：:Noncompetitive inhibitors of the nicotinic acetylcholine (ACh) receptors suppress cation flux directly by binding in and blocking the open channel or indirectly by stabilizing closed states of the receptor. The lidocaine derivative QX-314 and the acridine derivative quinacrine act directly as open channel blockers, bu...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0730718100

    authors： Yu Y,Shi L,Karlin A

    更新日期：2003-04-01 00:00:00

  • Integration of Agrobacterium tumefaciens T-DNA in the Saccharomyces cerevisiae genome by illegitimate recombination.

    abstract：:Agrobacterium tumefaciens can transfer part of its Ti plasmid, the T-DNA, to plant cells where it integrates into the nuclear genome via illegitimate recombination. Integration of the T-DNA results in small deletions of the plant target DNA, and may lead to truncation of the T-DNA borders and the production of filler ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.93.26.15272

    authors： Bundock P,Hooykaas PJ

    更新日期：1996-12-24 00:00:00

  • Temperature-dependent solvation modulates the dimensions of disordered proteins.

    abstract：:For disordered proteins, the dimensions of the chain are an important property that is sensitive to environmental conditions. We have used single-molecule Förster resonance energy transfer to probe the temperature-induced chain collapse of five unfolded or intrinsically disordered proteins. Because this behavior is se...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1313006111

    authors： Wuttke R,Hofmann H,Nettels D,Borgia MB,Mittal J,Best RB,Schuler B

    更新日期：2014-04-08 00:00:00

  • Period determination in the food-entrainable and methamphetamine-sensitive circadian oscillator(s).

    abstract：:Daily rhythmic processes are coordinated by circadian clocks, which are present in numerous central and peripheral tissues. In mammals, two circadian clocks, the food-entrainable oscillator (FEO) and methamphetamine-sensitive circadian oscillator (MASCO), are "black box" mysteries because their anatomical loci are unk...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1206213109

    authors： Pendergast JS,Oda GA,Niswender KD,Yamazaki S

    更新日期：2012-08-28 00:00:00

  • Discovery of an intrinsic tenase complex inhibitor: Pure nonasaccharide from fucosylated glycosaminoglycan.

    abstract：:Selective inhibition of the intrinsic coagulation pathway is a promising strategy for developing safer anticoagulants that do not cause serious bleeding. Intrinsic tenase, the final and rate-limiting enzyme complex in the intrinsic coagulation pathway, is an attractive but less explored target for anticoagulants due t...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1504229112

    authors： Zhao L,Wu M,Xiao C,Yang L,Zhou L,Gao N,Li Z,Chen J,Chen J,Liu J,Qin H,Zhao J

    更新日期：2015-07-07 00:00:00

  • Force production by depolymerizing microtubules: a theoretical study.

    abstract：:Chromosome movement during mitosis is powered in part by energy released through the depolymerization of kinetochore microtubules (MTs). Strong but indirect evidence suggests the existence of a specialized coupling between kinetochores and MT plus ends that enables this transduction of chemical energy into mechanical ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0501142102

    authors： Molodtsov MI,Grishchuk EL,Efremov AK,McIntosh JR,Ataullakhanov FI

    更新日期：2005-03-22 00:00:00

  • Surface photometry of celestial sources from a space vehicle: introduction and observational procedures.

    abstract：:Diffuse celestial sources of relatively low surface brightness such as the Milky Way, zodiacal light, and gegenschein (or contre lumière) can be studied most reliably from above the earth's atmosphere with equipment flown in artificial satellites. We review the techniques used and some of the difficulties encountered ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.69.3.694

    authors： Roach FE,Carroll B,Aller LH,Smith L

    更新日期：1972-03-01 00:00:00

  • Selection of catalytic antibodies for a biosynthetic reaction from a combinatorial cDNA library by complementation of an auxotrophic Escherichia coli: antibodies for orotate decarboxylation.

    abstract：:Antibodies capable of decarboxylating orotate were sought by immunization with a hapten designed to elicit antibodies with combining sites that resemble the orotate-binding and catalytic portion of the active site of the enzyme orotidine 5'-monophosphate (OMP) decarboxylase (orotidine-5'-monophosphate carboxy-lyase, E...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.91.18.8319

    authors： Smiley JA,Benkovic SJ

    更新日期：1994-08-30 00:00:00

  • An experimentally anchored map of transcriptional start sites in the model cyanobacterium Synechocystis sp. PCC6803.

    abstract：:There has been an increasing interest in cyanobacteria because these photosynthetic organisms convert solar energy into biomass and because of their potential for the production of biofuels. However, the exploitation of cyanobacteria for bioengineering requires knowledge of their transcriptional organization. Using di...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1015154108

    authors： Mitschke J,Georg J,Scholz I,Sharma CM,Dienst D,Bantscheff J,Voss B,Steglich C,Wilde A,Vogel J,Hess WR

    更新日期：2011-02-01 00:00:00

  • Deletion mutants of Neurospora crassa mitochondrial DNA and their relationship to the "stop-start" growth phenotype.

    abstract：:"Stoppers" are a class of Neurospora crassa extranuclear mutants characterized by gross deficiencies of cytochromes b and aa3 and an unusual growth phenotype which involves irregular periods of growth andnongrowth. In the present work, mtDNAs from all four stopper mutants were found to contain deletions or insertions ...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.77.10.6032

    authors： Bertrand H,Collins RA,Stohl LL,Goewert RR,Lambowitz AM

    更新日期：1980-10-01 00:00:00

  • Electron spin resonance studies of spin-labeled mammalian cells by detection of surface-membrane signals.

    abstract：:Lipid-soluble spin labels were incorporated into human lymphocytes and mouse L-cells and the resulting electron spin resonance spectra were compared with spectra obtained from similarly labeled human erythrocytes. Spin labels were found in all subcellular fractions of the nucleated cells that contained membranes. Spin...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.70.1.66

    authors： Kaplan J,Canonico PG,Caspary WJ

    更新日期：1973-01-01 00:00:00

  • Use of synthetic oligonucleotide probes complementary to genes for human HLA-DR alpha and beta as extension primers for the isolation of 5'-specific genomic clones.

    abstract：:We have synthesized 175-nucleotide-long probes for the DNA of human histocompatibility antigens HLA-DR alpha and beta by extending on poly(A)+ mRNA from B-cell lines with short synthetic deoxyribonucleotide primers complementary to the predicted nucleotide sequence of the NH2 terminus of both polypeptides. The synthes...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.80.6.1531

    authors： Das HK,Biro PA,Cohen SN,Erlich HA,von Gabain A,Lawrance SK,Lemaux PG,McDevitt HO,Peterlin BM,Schulz MF,Sood AK,Weissman SM

    更新日期：1983-03-01 00:00:00

  • βIV-Spectrin and CaMKII facilitate Kir6.2 regulation in pancreatic beta cells.

    abstract：:Identified over a dozen years ago in the brain and pancreatic islet, βIV-spectrin is critical for the local organization of protein complexes throughout the nervous system. βIV-Spectrin targets ion channels and adapter proteins to axon initial segments and nodes of Ranvier in neurons, and βIV-spectrin dysfunction unde...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.1314195110

    authors： Kline CF,Wright PJ,Koval OM,Zmuda EJ,Johnson BL,Anderson ME,Hai T,Hund TJ,Mohler PJ

    更新日期：2013-10-22 00:00:00

  • p53 accumulates but is functionally impaired when DNA synthesis is blocked.

    abstract：:p53 is required for the induction of a G(1) and/or G(2) irreversible arrest after gamma irradiation (IR), whereas blocked DNA replication causes a p53-independent S-phase arrest. We have examined the response to p53 when DNA synthesis is blocked by hydroxyurea (HU) or aphidicolin or when DNA is damaged by gamma IR. Si...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.021282898

    authors： Gottifredi V,Shieh S,Taya Y,Prives C

    更新日期：2001-01-30 00:00:00

  • A remarkable, precisely timed release of hyperglycemic hormone from endocrine cells in the gut is associated with ecdysis in the crab Carcinus maenas.

    abstract：:Molting or ecdysis is the most fundamentally important process in arthropod life history, because shedding of the exoskeleton is an absolute prerequisite for growth and metamorphosis. Although the hormonal mechanisms driving ecdysis in insects have been studied extensively, nothing is known about these processes in cr...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.96.23.13103

    authors： Chung JS,Dircksen H,Webster SG

    更新日期：1999-11-09 00:00:00

  • Cyclin-dependent kinase 5 regulates dopaminergic and glutamatergic transmission in the striatum.

    abstract：:Dopaminergic and glutamatergic neurotransmissions in the striatum play an essential role in motor- and reward-related behaviors. Dysfunction of these neurotransmitter systems has been found in Parkinson's disease, schizophrenia, and drug addiction. Cyclin-dependent kinase 5 (CDK5) negatively regulates postsynaptic sig...

    journal_title：Proceedings of the National Academy of Sciences of the United States of America

    pub_type： 杂志文章

    doi：10.1073/pnas.0308652100

    authors： Chergui K,Svenningsson P,Greengard P

    更新日期：2004-02-17 00:00:00