Search Results - "Berges, J. A."

Cell death and degeneration in the symbiotic dinoflagellates of the coral Stylophora pistillata during bleaching by FRANKLIN, D. J, HOEGH-GULDBERG, O, JONES, R. J, BERGES, J. A

“…Rising sea temperatures are increasing the incidences of mass coral bleaching (the dissociation of the coral-algal symbiosis) and coral mortality. In this…”
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New types of metacaspases in phytoplankton reveal diverse origins of cell death proteases by Choi, C J, Berges, J A

“…Metacaspases are evolutionarily distant homologs of caspases that are found outside the metazoan and are known to have key roles in programmed cell death…”
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Mortality in cultures of the dinoflagellate Amphidinium carterae during culture senescence and darkness by Franklin, D. J., Berges, J. A.

“…The study of cell death in higher plants and animals has revealed the existence of an active (‘programmed’) process in most types of cell, and similarities in…”
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Determining Parameters of the Numerical Response by Montagnes, D. J. S., Berges, J. A.

“…The numerical response, the change in specific growth rate with food concentration, is a fundamental component of many aquatic microbial studies. Accurately…”
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Differential Effects of Nitrogen Limitation on Photosynthetic Efficiency of Photosystems I and II in Microalgae by Berges, John A., Denis O. Charlebois, David C. Mauzerall, Falkowski, Paul G.

“…The effects of nitrogen starvation on photosynthetic efficiency were examined in three unicellular algae by measuring changes in the quantum yield of…”
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Ratios, Regression Statistics, and "Spurious" Correlations by Berges, John A.

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Dynamics of a virus–host model with an intrinsic quota by Fuhrman, K.M., Pinter, G.A., Berges, J.A.

“…In this work we develop and analyze a mathematical model describing the dynamics of infection by a virus of a host population in a freshwater environment. Our…”
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Effect of dead phytoplankton cells on the apparent efficiency of photosystem II by Franklin, Daniel J., Choi, Chang Jae, Hughes, Claire, Malin, Gill, Berges, John A.

“…Measurements of the efficiency of photosystem (PS) II have become widespread in biological oceanography, and various forms are used to assess the ‘health’ of…”
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Laboratory and field responses of algal nitrate reductase to diel periodicity in irradiance, nitrate exhaustion, and the presence of ammonium by Berges, John A., Cochlan, William P., Harrison, Paul J.

“…Use of nitrate reductase (NR) activity as an index of rates of nitrate incorporation in marine phytoplankton has been complicated by inadequate assays, and the…”
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Physiological Stress and Cell Death in Marine Phytoplankton: Induction of Proteases in Response to Nitrogen or Light Limitation by Berges, John A., Falkowski, Paul G.

“…The physiological processes of natural phytoplankton mortality due to environmental stress (vs. that caused by sedimentation and predation) are poorly…”
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Fitting ecological and physiological data to rectangular hyperbolae: a comparison of methods using Monte Carlo simulations by Berges, John A., Montagnes, David J. S., Hurd, C. L., Harrison, P. J.

“…Recommendations were developed to help aquatic scientists select which curve fitting method should be used to fit data that are expected to follow rectangular…”
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Effects of temperature on growth rate, cell composition and nitrogen metabolism in the marine diatom Thalassiosira pseudonana (Bacillariophyceae) by BERGES, John A, VARELA, Diana E, HARRISON, Paul J

“…Although temperature effects on phytoplankton growth and photosynthesis can be clearly demonstrated in the laboratory, their relevance in the field is much…”
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Estimating Carbon, Nitrogen, Protein, and Chlorophyll a from Volume in Marine Phytoplankton by David J. S. Montagnes, Berges, John A., Harrison, Paul J., Taylor, F. J. R.

“…The size of 30 small (2-60$\mu$m) phytoplankton species was examined with a microscope and a Coulter Counter before and after fixation. Acid Lugol's isodine…”
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Nitrate reductase activity in macroalgae and its vertical distribution in macroalgal epiphytes of seagrasses by Young, E. B., Lavery, P. S., van Elven, B., Dring, M. J., Berges, J. A.

“…Macroalgal epiphytes within seagrass meadows make a significant contribution to total primary production by assimilating water column N and transferring…”
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Relationship between Body Size, Growth Rate, and Maximal Enzyme Activities in the Brine Shrimp, Artemia franciscana by Berges, John A., Roff, John C., Ballantyne, James S.

“…Activity-body size relationships for eight enzymes (citrate synthase, CS; lactate dehydrogenase, LDH; pyruvate kinase, PK; alanine aminotransferase, ala AT;…”
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Expanding the capabilities of laboratory instruments using built-in microprocessors and serial interfaces: adapting an LKB Ultrospec II UV spectrophotometer for scanning and enzyme kinetic analyses by Berges, J A, Virtanen, C

“…An IBM-compatible microcomputer was used to enable an LKB Ultrospec II UV-Visible spectrophotometer to perform two features which are not available on the…”
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Nitrate Reductase Activity Quantitatively Predicts the Rate of Nitrate Incorporation Under Steady State Light Limitation: A Revised Assay and Characterization of the Enzyme in Three Species of Marine Phytoplankton by Berges, John A., Harrison, P. J.

“…The enzyme nitrate reductase (NR) has been proposed as an index of nitrate incorporation rates in marine phytoplankton, but it has proven difficult to…”
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Transformations of biogenic particulates from the pelagic to the deep ocean realm by Boyd, P.W., Sherry, N.D., Berges, J.A., Bishop, J.K.B., Calvert, S.E., Charette, M.A., Giovannoni, S.J., Goldblatt, R., Harrison, P.J., Moran, S.B., Roy, S., Soon, M., Strom, S., Thibault, D., Vergin, K.L., Whitney, F.A., Wong, C.S.

“…This overview compares and contrasts trends in the magnitude of the downward Particulate Organic Carbon (POC) flux with observations on the vertical profiles…”
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Physiological and Biochemical Responses of Two Seaweeds to Nutrient or Light Deprivation by Lourenço, S. O., Berges, J. A.

“…The algae Fucus vesiculosus (brown) and Enteromorpha compressa (green) were cultured in long‐term experiments in which natural seawater without nutrient…”
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In vitro iron enrichment experiments at iron-rich and -poor sites in the NE subarctic Pacific by Boyd, Philip, Berges, John A, Harrison, P.J

“…Despite evidence of Fe limitation of phytoplankton biomass in large areas of the ocean, few studies have assessed the relationships between algal stocks and Fe…”
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