Recent Publications

  • Valencia B., Decima M, Landry MR.  2018.  Environmental Effects on Mesozooplankton Size Structure and Export Flux at Station ALOHA, North Pacific Subtropical Gyre. Global Biogeochemical Cycles. 32:289-305.
    Abstract Summary:

    Using size-fractionated mesozooplankton biomass data collected over 23 years (1994-2016) of increasing primary production (PP) at station ALOHA (A Long-Term Oligotrophic Habitat Assessment), we evaluate how changing environmental conditions affect mesozooplankton size structure, trophic cycling, and export fluxes in the subtropical North Pacific. From generalized additive model analysis, size structure is significantly influenced by a...

  • Sweetman A.K, Thurber AR, Smith C.R, Levin L.A, Mora C., Wei C.L, Gooday A.J, Jones D.OB, Rex M., Yasuhara M. et al..  2017.  Major impacts of climate change on deep-sea benthic ecosystems. 5:1-23.
    Abstract Summary:

    The deep sea encompasses the largest ecosystems on Earth. Although poorly known, deep seafloor ecosystems provide services that are vitally important to the entire ocean and biosphere. Rising atmospheric greenhouse gases are bringing about significant changes in the environmental properties of the ocean realm in terms of water column oxygenation, temperature, pH and food supply, with concomitant impacts on deep-sea ecosystems. Projections...

  • Abstract Summary:

    Energetically costly lunge feeding at depth causes the respiratory patterns and feeding performance of rorqual whales (Family Balaenopteridae) to hinge in part upon prey patch depth. This contingency has the potential to precipitate differences in prey preference and habitat suitability for sympatric species and may be a factor in competitive interactions, but comparative respiration studies are a necessary first step in assessing this...

  • Young A.P.  2018.  Decadal-scale coastal cliff retreat in southern and central California. Geomorphology. 300:164-175.
    Abstract Summary:

    Airborne LiDAR data collected in 1998 and 2009-2010 were used to measure coastal cliff erosion and retreat between the Mexico/California border and Bodega Head, California. Cliff erosion was detected along 44% of the 595 km of shoreline evaluated, while the remaining cliffs were relatively stable. The mean cliff top retreat rate was 0.12 m/yr, while mean retreat averaged over the entire cliff face was 0.04 m/yr. The maximum cliff top and face...

  • Breitburg D, Levin LA, Oschlies A, Grégoire M, Chavez FP, Conley DJ, Garçon V, Gilbert D, Gutiérrez D, Isensee K et al..  2018.  Declining oxygen in the global ocean and coastal waters. Science. 359
    Abstract Summary:

    As plastic waste pollutes the oceans and fish stocks decline, unseen below the surface another problem grows: deoxygenation. Breitburg et al. review the evidence for the downward trajectory of oxygen levels in increasing areas of the open ocean and coastal waters. Rising nutrient loads coupled with climate change—each resulting from human activities—are changing ocean biogeochemistry and increasing oxygen consumption. This results in...

  • Tatters AO, Schnetzer A, Xu K, Walworth NG, Fu F, Spackeen JL, Sipler RE, Bertrand EM, McQuaid JB, Allen AE et al..  2018.  Interactive effects of temperature, CO2 and nitrogen source on a coastal California diatom assemblage. Journal of Plankton Research. 40:151-164.
    Abstract Summary:

    Diatoms are often considered to be a single functional group, yet there is a great deal of morphological, genetic and ecological diversity within the class. How these differences will translate into species-specific responses to rapid changes in the ocean environment resulting from climate change and eutrophication is currently poorly understood. We investigated the response of a natural diatom-dominated assemblage in coastal California...

  • Fiedler J.W, Smit P.B, Brodie K.L, McNinch J., Guza RT.  2018.  Numerical modeling of wave runup on steep and mildly sloping natural beaches. Coastal Engineering. 131:106-113.
    Abstract Summary:

    Runup on ocean beaches includes steady wave setup and oscillating swash, often decomposed into wind generated sea-swell (SS), and lower frequency infragravity (IG) waves. We show that the numerically fast, open-source numerical model 1D SWASH predicts accurately the bulk properties of runup observed on two natural beaches (one steep and one shallow sloped) for a range of incident wave conditions. The runup tongue shape was measured with a...

  • Tort M., Winters KB.  2018.  Poleward propagation of near-inertial waves induced by fluctuating winds over a baroclinically unstable zonal jet. Journal of Fluid Mechanics. 834:510-530.
    Abstract Summary:

    We investigate the excitation and radiation of near-inertial internal gravity waves continuously excited by a latitudinally confined temporally fluctuating wind in a numerical model of a stratified ocean on a beta-plane at mid-latitude. The surface wind forcing contains both high- and low-frequency components which excite propagating waves and a baroclinically unstable zonal jet respectively. Wentzel-Kramers-Brillouin (WKB) ray theory implies...

  • Neira C., Vales M., Mendoza G., Hoh E., Levin L.A.  2018.  Polychlorinated biphenyls (PCBs) in recreational marina sediments of San Diego Bay, southern California. Marine Pollution Bulletin. 126:204-214.
    Abstract Summary:

    Polychlorinated biphenyl (PCB) concentrations were determined in surface sediments from three recreational marinas in San Diego Bay, California. Total PCB concentrations ranged from 23 to 153, 31-294, and 151-1387 ng g(-1) for Shelter Island Yacht Basin (SIYB), Harbor Island West (HW) and Harbor Island East (HE), respectively. PCB concentrations were significantly higher in HE and PCB group composition differed relative to HW and SIYB, which...

  • Abstract Summary:

    Particles and aggregates created in the surface layers of the ocean are transported not only by gravity, but also by the horizontal and vertical advection of the surrounding water. Subduction, in particular, can transport organic matter from the surface ocean to the mesopelagic in a manner that is not likely to be detected by typical in situ carbon export measurements (e.g., sediment traps and U-238-Th-234 disequilibrium). To assess the...

  • Nezlin N.P, McLaughlin K., Booth J.AT, Cash C.L, Diehl D.W, Davis K.A, Feit A., Goericke R, Gully J.R, Howard M.DA et al..  2018.  Spatial and temporal patterns of chlorophyll concentration in the Southern California Bight. Journal of Geophysical Research-Oceans. 123:231-245.
    Abstract Summary:

    Distinguishing between local, anthropogenic nutrient inputs and large-scale climatic forcing as drivers of coastal phytoplankton biomass is critical to developing effective nutrient management strategies. Here we assess the relative importance of these two drivers by comparing trends in chlorophyll-a between shallow coastal (0.1-16.5 km) and deep offshore (17-700 km) areas, hypothesizing that coastal regions influenced by anthropogenic...

  • Colosi J.A, Kumar N., Suanda S.H, Freismuth T.M, Macmahan J.H.  2018.  Statistics of internal tide bores and internal solitary waves observed on the inner continental shelf off Point Sal, California. Journal of Physical Oceanography. 48:123-143.
    Abstract Summary:

    Moored observations of temperature and current were collected on the inner continental shelf off Point Sal, California, between 9 June and 8 August 2015. The measurements consist of 10 moorings in total: 4 moorings each on the 50- and 30-m isobaths covering a 10-km along-shelf distance and an across-shelf section of moorings on the 50-, 40-, 30-, and 20-m isobaths covering a 5-km distance. Energetic, highly variable, and strongly dissipating...

  • Cyronak T., Andersson AJ, Langdon C., Albright R., Bates NR, Caldeira K., Carlton R., Corredor J.E, Dunbar R.B, Enochs I. et al..  2018.  Taking the metabolic pulse of the world's coral reefs. Plos One. 13
    Abstract Summary:

    Worldwide, coral reef ecosystems are experiencing increasing pressure from a variety of anthropogenic perturbations including ocean warming and acidification, increased sedimentation, eutrophication, and overfishing, which could shift reefs to a condition of net calcium carbonate (CaCO3) dissolution and erosion. Herein, we determine the net calcification potential and the relative balance of net organic carbon metabolism (net community...

  • Suanda S.H, Feddersen F, Kumar N..  2017.  The effect of barotropic and baroclinic tides on coastal stratification and mixing. Journal of Geophysical Research-Oceans. 122:10156-10173.
    Abstract Summary:

    The effects of barotropic and baroclinic tides on subtidal stratification and vertical mixing are examined with high-resolution, three-dimensional numerical simulations of the Central Californian coastal upwelling region. A base simulation with realistic atmospheric and regional-scale boundary forcing but no tides (NT) is compared to two simulations with the addition of predominantly barotropic local tides ( LT) and with combined barotropic...

  • Haddock S.HD, Christianson L.M, Francis W.R, Martini S., Dunn C.W, Pugh P.R, Mills C.E, Osborn K.J, Seibel B.A, Choy C.A et al..  2017.  Insights into the biodiversity, behavior, and bioluminescence of deep-sea organisms using molecular and maritime technology. Oceanography. 30:38-47.
    Abstract Summary:

    Since its founding, the Monterey Bay Aquarium Research Institute (MBARI) has pioneered unique capabilities for accessing the deep ocean and its inhabitants through focused peer relationships between scientists and engineers. This focus has enabled breakthroughs in our understanding of life in the sea, leading to fundamental advances in describing the biology and the ecology of open-ocean and deep-sea animals. David Packard's founding...

  • Giddings S.N, MacCready P..  2017.  Reverse estuarine circulation due to local and remote wind forcing, enhanced by the presence of along-coast estuaries. Journal of Geophysical Research-Oceans. 122:10184-10205.
    Abstract Summary:

    Estuarine exchange flow governs the interaction between oceans and estuaries and thus plays a large role in their biogeochemical processes. This study investigates the variability in estuarine exchange flow due to offshore oceanic conditions including upwelling/downwelling, and the presence of a river plume offshore (from a neighboring estuary). We address these processes via numerical simulations at the mouth of the Salish Sea, a large...

  • Wells B.K, Schroeder I.D, Bograd SJ, Hazen E.L, Jacox M.G, Leising A., Mantua N., Santora J.A, Fisher J., Peterson W.T et al..  2017.  State Of The California Current 2016-17: Still Anything But "Normal" In The North. California Cooperative Oceanic Fisheries Investigations Reports. 58:1-55.
    Abstract Summary:

    This report examines the ecosystem state of the California Current System (CCS) from spring 2016-spring 2017. Basin-scale indices suggest conditions that would support average to below average coast-wide production across the CCS during this time period. Regional surveys in 2016 sampled anomalously warm surface and subsurface waters across the CCS. Chlorophyll concentrations were low across the CCS in 2016 and, concomitant with that, copepod...

  • Highlighted Publication A schematic representation of the generalized Southern California Current System food web model
    Lindegren M, Checkley DM, Koslow JA, Goericke R, Ohman MD.  2017.  Climate-mediated changes in marine ecosystem regulation during El Niño. Global Change Biology. :n/a-n/a.
    Abstract Summary:

    The degree to which ecosystems are regulated through bottom-up, top-down, or direct physical processes represents a long-standing issue in ecology, with important consequences for resource management and conservation. In marine ecosystems, the role of bottom-up and top-down forcing has been shown to vary over spatio-temporal scales, often linked to highly variable and heterogeneously distributed environmental conditions. Ecosystem dynamics in...

  • Ziegler A.F, Smith C.R, Edwards K.F, Vernet M.  2017.  Glacial dropstones: islands enhancing seafloor species richness of benthic megafauna in West Antarctic Peninsula fjords. Marine Ecology Progress Series. 583:1-14.
    Abstract Summary:

    The West Antarctic Peninsula (WAP) margin is dominated by glaciomarine fjords and has experienced rapid climate warming in recent decades. Glacial calving along the peninsula delivers icerafted debris (e.g. dropstones) to heavily sedimented fjord basins and the open continental shelf. Dropstones provide hard substrate, increase habitat heterogeneity, and may function as island habitats surrounded by mud. We used seafloor photographic...

  • Gallo N.D, Victor D.G, Levin L.A.  2017.  Ocean commitments under the Paris Agreement. Nature Climate Change. 7:833-+.
    Abstract Summary:

    Under the Paris Agreement nations made pledges known as nationally determined contributions (NDCs), which indicate how national governments are evaluating climate risks and policy opportunities. We find that NDCs reveal important systematic patterns reflecting national interests and capabilities. Because the ocean plays critical roles in climate mitigation and adaptation, we created a quantitative marine focus factor (MFF) to evaluate how...

  • Roncalli V., Christie A.E, Sommer S.A, Cieslak M.C, Hartline D.K, Lenz P.H.  2017.  A deep transcriptomic resource for the copepod crustacean Labidocera madurae: A potential indicator species for assessing near shore ecosystem health. Plos One. 12
    Abstract Summary:

    Coral reef ecosystems of many sub-tropical and tropical marine coastal environments have suffered significant degradation from anthropogenic sources. Research to inform management strategies that mitigate stressors and promote a healthy ecosystem has focused on the ecology and physiology of coral reefs and associated organisms. Few studies focus on the surrounding pelagic communities, which are equally important to ecosystem function....

  • Decima M, Landry MR, Bradley C.J, Fogel M.L.  2017.  Alanine delta(15) N trophic fractionation in heterotrophic protists. Limnology and Oceanography. 62:2308-2322.
    Abstract Summary:

    We evaluated differences in the N-15 isotopic enrichment factors of trophic amino acids (AA) for protistan (microzooplankton) and metazoan (mesozooplankton) consumers, testing the hypothesis that delta N-15 of alanine (ala) increases in both consumer types, while glutamic acid (glu) enriches mainly in mesozooplankton. AA delta N-15 values were measured for dinoflagellate and ciliate grazers and their respective algal prey (Oxyrrhis marina/...

  • Abstract Summary:

    The eastern oyster (Crassostrea virginica) is a foundation species providing significant ecosystem services. However, the roles of oyster microbiomes have not been integrated into any of the services, particularly nitrogen removal through denitrification. We investigated the composition and denitrification potential of oyster microbiomes with an approach that combined 16S rRNA gene analysis, metabolic inference, qPCR of the nitrous oxide...

  • Melgar D, Riquelrne S., Xu X.H, Baez J.C, Geng JH, Moreno M..  2017.  The first since 1960: A large event in the Valdivia segment of the Chilean Subduction Zone, the 2016 M7.6 Melinka earthquake. Earth and Planetary Science Letters. 474:68-75.
    Abstract Summary:

    We present results for joint kinematic inversion of high-rate GPS, strong motion and InSAR data for the 2016 M7.6 Melinka earthquake. We show that the source is a compact 35 s long rupture with 5.0 +/- 0.15 m of peak slip. We find the Melinka earthquake occurs inside the slip region for the 1960 M9.5 Valdivia earthquake and within the highly locked portion of the megathrust inferred from inter-seismic velocity analysis. We show that there is...

  • Cuomo G., Guza RT.  2017.  Infragravity Seiches in a Small Harbor. Journal of Waterway Port Coastal and Ocean Engineering. 143
    Abstract Summary:

    A method is developed to estimate harbor seiche at Marina di Carrara, Italy, from the properties of wind-generated incident waves outside the harbor. A linear model of the spatial structure of amplified seiche modes is combined with empirical estimates of the response of each mode to variable incident wave forcing. These empirical coefficients parameterize the complex nonlinear transfer of energy from wind waves to lower frequency seiche. As...

  • McCormick L.R, Levin L.A.  2017.  Physiological and ecological implications of ocean deoxygenation for vision in marine organisms. Philosophical Transactions of the Royal Society a-Mathematical Physical and Engineering Sciences. 375
    Abstract Summary:

    Climate change has induced ocean deoxygenation and exacerbated eutrophication-driven hypoxia in recent decades, affecting the physiology, behaviour and ecology of marine organisms. The high oxygen demand of visual tissues and the known inhibitory effects of hypoxia on human vision raise the questions if and how ocean deoxygenation alters vision in marine organisms. This is particularly important given the rapid loss of oxygen and strong...

  • Sosa-Avalos R., Durazo R., Mitchell B.G, Cepeda-Morales J., Gaxiola-Castro G..  2017.  Phytoplankton photosynthetic parameters off Baja California: A tool to estimate primary production with remote sensing data. Ciencias Marinas. 43:157-172.
    Abstract Summary:

    Phytoplankton photosynthetic parameters (maximum light utilization coefficient, alpha*; maximum photosynthetic rate, P-m*; maximum quantum yield, phi(max)) off Baja California were estimated from samples collected at the 50% light level during winter, spring, summer, and autumn 1999. Chlorophyll concentration was also determined, and in situ experiments were conducted using the C-14 method to determine primary production (PP) in the euphotic...

  • Crosby S.C, Cornuelle BD, O'Reilly W.C, Guza RT.  2017.  Assimilating Global Wave Model Predictions and Deep-Water Wave Observations in Nearshore Swell Predictions. Journal of Atmospheric and Oceanic Technology. 34:1823-1836.
    Abstract Summary:

    Nearshore wave predictions with high resolution in space and time are needed for boating safety, to assess flood risk, and to support nearshore processes research. This study presents methods for improving regional nearshore predictions of swell-band wave energy (0.04-0.09 Hz) by assimilating local buoy observations into a linear wave propagation model with a priori guidance from global WAVEWATCH III (WW3) model predictions. Linear wave...

  • Jones W.A, Checkley DM.  2017.  Classification of otoliths of fishes common in the Santa Barbara Basin based on morphology and chemical composition. Canadian Journal of Fisheries and Aquatic Sciences. 74:1195-1207.
    Abstract Summary:

    Morphological and chemical features of fish otoliths are used to distinguish between populations and stocks. We hypothesized that these features can also be used to distinguish between fishes of different taxonomic groups common in and near the Santa Barbara Basin, including mesopelagic, pelagic, and demersal fish. Sagittal otoliths obtained from 905 fish representing six taxonomic groups were imaged, and 12 geometric and 59 elliptic Fourier...

  • McCarthy JK, Smith S.R, McCrow J.P, Tan M., Zheng H., Beeri K., Roth R., Lichtle C., Goodenough U., Bowler C.P et al..  2017.  Nitrate reductase knockout uncouples nitrate transport from nitrate assimilation and drives repartitioning of carbon flux in a model pennate diatom. Plant Cell. 29:2047-2070.
    Abstract Summary:

    The ecological prominence of diatoms in the ocean environment largely results from their superior competitive ability for dissolved nitrate (NO3-). To investigate the cellular and genetic basis of diatom NO3- assimilation, we generated a knockout in the nitrate reductase gene (NR-KO) of the model pennate diatom Phaeodactylum tricornutum. In NR-KO cells, N-assimilation was abolished although NO3- transport remained intact. Unassimilated NO3-...

  • Highlighted Publication Public domain sea urchin photo by Kevin Lee
    P. Parnell E, Fumo JT, Lennert-Cody CE, Schroeter SC, Dayton PK.  2017.  Sea urchin behavior in a Southern California Kelp Forest: Food, fear, behavioral niches, and scaling up individual behavior. Journal of Shellfish Research. 36:529-543.
    Abstract Summary:

    Red and purple sea urchins (Mesocentrotus francisanus and Strongylocentrotus purpuratus) cohabit the west coast of North America and exhibit behavioral switching between sheltering, when food is abundant, and emergence and overgrazing, when food is scarce. To better understand individual urchin foraging behavior, we conducted a series of time-lapse behavioral studies within and at the edge of a resilient sea urchin barren. Photographs were...

  • Welti N., Striebel M., Ulseth A.J, Cross W.F, DeVilbiss S., Glibert P.M, Guo L., Hirst A.G, Hood J., Kominoski J.S et al..  2017.  Bridging Food Webs, Ecosystem Metabolism, and Biogeochemistry Using Ecological Stoichiometry Theory. Frontiers in Microbiology. 8
    Abstract Summary:

    Although aquatic ecologists and biogeochemists are well aware of the crucial importance of ecosystem functions, i. e., how biota drive biogeochemical processes and vice-versa, linking these fields in conceptual models is still uncommon. Attempts to explain the variability in elemental cycling consequently miss an important biological component and thereby impede a comprehensive understanding of the underlying processes governing energy and...

  • Mendoza WG, Weiss EL, Schieber B, B. Mitchell G.  2017.  Controls on the distribution of fluorescent dissolved organic matter during an under-ice algal bloom in the western Arctic Ocean. Global Biogeochemical Cycles. 31:1118-1140.
    Abstract Summary:

    In this study we used fluorescence excitation and emission matrix spectroscopy, hydrographic data, and a self-organizing map (SOM) analysis to assess the spatial distribution of labile and refractory fluorescent dissolved organic matter (FDOM) for the Chukchi and Beaufort Seas at the time of a massive under-ice phytoplankton bloom during early summer 2011. Biogeochemical properties were assessed through decomposition of water property classes...

  • Mendoza W.G, Weiss E.L, Schieber B., Mitchell B.G.  2017.  Controls on the distribution of fluorescent dissolved organic matter during an under-ice algal bloom in the western Arctic Ocean. Global Biogeochemical Cycles. 31:1118-1140.
    Abstract Summary:

    In this study we used fluorescence excitation and emission matrix spectroscopy, hydrographic data, and a self-organizing map (SOM) analysis to assess the spatial distribution of labile and refractory fluorescent dissolved organic matter (FDOM) for the Chukchi and Beaufort Seas at the time of a massive under-ice phytoplankton bloom during early summer 2011. Biogeochemical properties were assessed through decomposition of water property classes...

  • Diner RE, Noddings CM, Lian NC, Kang AK, McQuaid JB, Jablanovic J, Espinoza JL, Nguyen NA, Anzelmatti MA, Jansson J et al..  2017.  Diatom centromeres suggest a mechanism for nuclear DNA acquisition. Proceedings of the National Academy of Sciences. 114:E6015-E6024.
    Abstract Summary:

    Centromeres are essential for cell division and growth in all eukaryotes, and knowledge of their sequence and structure guides the development of artificial chromosomes for functional cellular biology studies. Centromeric proteins are conserved among eukaryotes; however, centromeric DNA sequences are highly variable. We combined forward and reverse genetic approaches with chromatin immunoprecipitation to identify centromeres of the model...

  • Diner R.E, Nodding C.M, Lian N.C, Kang A.K, McQuaid J.B, Jablanovic J., Espinoza J.L, Nguyen N.A, Anzelmatti M.A, Jansson J. et al..  2017.  Diatom centromeres suggest a mechanism for nuclear DNA acquisition. Proceedings of the National Academy of Sciences of the United States of America. 114:E6015-E6024.
    Abstract Summary:

    Centromeres are essential for cell division and growth in all eukaryotes, and knowledge of their sequence and structure guides the development of artificial chromosomes for functional cellular biology studies. Centromeric proteins are conserved among eukaryotes; however, centromeric DNA sequences are highly variable. We combined forward and reverse genetic approaches with chromatin immunoprecipitation to identify centromeres of the model...

  • Menapace W., Volker D., Kaul N., Tryon M.D, Kopf A.J.  2017.  The role of mud volcanism and deep-seated dewatering processes in the Nankai Trough accretionary prism and Kumano Basin, Japan. Geochemistry Geophysics Geosystems. 18:2486-2509.
    Abstract Summary:

    Circulation of water at moderate depths in subduction zones is dominantly driven by clay mineral dehydration over distinct pressure and temperature gradients. The signature of these dehydration reactions is found in mud volcano pore waters, however, it is largely unknown, how much of the deep-seated fluids are emitted at mud volcanoes. To unravel this relation for the region off the Kii Peninsula, Japan, we calculated the water volume that is...

  • Bromirski PD, Chen Z., Stephen R.A, Gerstoft P, Arcas D., Diez A., Aster R.C, Wiens D.A, Nyblade A..  2017.  Tsunami and infragravity waves impacting Antarctic ice shelves. Journal of Geophysical Research-Oceans. 122:5786-5801.
    Abstract Summary:

    The responses of the Ross Ice Shelf (RIS) to the 16 September 2015 8.3 (M-w) Chilean earthquake tsunami (>75 s period) and to oceanic infragravity (IG) waves (50-300 s period) were recorded by a broadband seismic array deployed on the RIS from November 2014 to November 2016. Here we show that tsunami and IG-generated signals within the RIS propagate at gravity wave speeds (similar to 70 m/s) as water-ice coupled flexural-gravity waves. IG...

  • Jayne SR, Roemmich D., Zilberman N., Riser S.C, Johnson K.S, Johnson G.C, Piotrowicz S.R.  2017.  The Argo Program Present and Future. Oceanography. 30:18-28.
    Abstract Summary:

    The Argo Program has revolutionized large-scale physical oceanography through its contributions to basic research, national and international climate assessment, education, and ocean state estimation and forecasting. This article discusses the present status of Argo and enhancements that are underway. Extensions of the array into seasonally ice-covered regions and marginal seas as well as increased numbers of floats along the equator and...

  • Bowman J.S, Amaral-Zettler L.A, Rich J.J, Luria C.M, Ducklow H.W.  2017.  Bacterial community segmentation facilitates the prediction of ecosystem function along the coast of the western Antarctic Peninsula. Isme Journal. 11:1460-1471.
    Abstract Summary:

    Bacterial community structure can be combined with observations of ecophysiological data to build predictive models of microbial ecosystem function. These models are useful for understanding how function might change in response to a changing environment. Here we use five spring-summer seasons of bacterial community structure and flow cytometry data from a productive coastal site along the western Antarctic Peninsula to construct models of...

  • Koslow JA, McMonagle H., Watson W.  2017.  Influence of climate on the biodiversity and community structure of fishes in the southern California Current. Marine Ecology Progress Series. 571:193-206.
    Abstract Summary:

    Previous studies have reported dramatic declines of midwater fishes in the southern California Current System (CCS) in response to reduced deepwater oxygen concentration, and many CCS endemics and cool-water affinity taxa have also declined since 1969. Here we show that these abundance changes are associated with changes in the diversity of the CCS fish community. Species richness was positively associated with periods of relatively high...

  • Lee ZM-P, Poret-Peterson AT, Siefert JL, Kaul D, Moustafa A, Allen AE, Dupont CL, Eguiarte LE, Souza V, Elser JJ.  2017.  Nutrient stoichiometry shapes microbial community structure in an evaporitic shallow pond. Frontiers in Microbiology. 8
    Abstract Summary:

    Nutrient availability and ratios can play an important role in shaping microbial communities of freshwater ecosystems. The Cuatro Ciénegas Basin (CCB) in Mexico is a desert oasis where, perhaps paradoxically, high microbial diversity coincides with extreme oligotrophy. To better understand the effects of nutrients on microbial communities in CCB, a mesocosm experiment was implemented in a stoichiometrically imbalanced pond, Lagunita, which...

  • Lee Z.MP, Poret-Peterson A.T, Siefert J.L, Kaul D., Moustafa A., Allen A.E, Dupont C.L, Eguiarte L.E, Souza V., Elser J.J.  2017.  Nutrient stoichiometry shapes microbial community structure in an evaporitic shallow pond. Frontiers in Microbiology. 8
    Abstract Summary:

    Nutrient availability and ratios can play an important role in shaping microbial communities of freshwater ecosystems. The Cuatro Cienegas Basin (CCB) in Mexico is a desert oasis where, perhaps paradoxically, high microbial diversity coincides with extreme oligotrophy. To better understand the effects of nutrients on microbial communities in CCB, a mesocosm experiment was implemented in a stoichiometrically imbalanced pond, Lagunita, which...

  • Parker E.A, Rippy MA, Mehring A.S, Winfrey B.K, Ambrose R.F, Levin L.A, Grant S.B.  2017.  Predictive power of clean bed filtration theory for fecal indicator bacteria removal in stormwater biofilters. Environmental Science & Technology. 51:5703-5712.
    Abstract Summary:

    Green infrastructure (also referred to as low impact development, or LID) has the potential to transform urban stormwater runoff from an environmental threat to a valuable water resource. In this paper we focus on the removal of fecal indicator bacteria (FIB, a pollutant responsible for runoff associated inland and coastal beach closures) in stormwater biofilters (a common type of green infrastructure). Drawing on a combination of previously...

  • Shen S.G, Thompson A.R, Correa J., Fietzek P., Ayon P., Checkley DM.  2017.  Spatial patterns of Anchoveta (Engraulis ringens) eggs and larvae in relation to pCO(2) in the Peruvian upwelling system. Proceedings of the Royal Society B-Biological Sciences. 284
    Abstract Summary:

    Large and productive fisheries occur in regions experiencing or projected to experience ocean acidification. Anchoveta (Engraulis ringens) constitute the world's largest single-species fishery and live in one of the ocean's highest pCO(2) regions. We investigated the relationship of the distribution and abundance of Anchoveta eggs and larvae to natural gradients in pCO(2) in the Peruvian upwelling system. Eggs and larvae, zooplankton, and...

  • Highlighted Publication Locations of the study area and sampling sites.
    Abstract Summary:

    It is generally accepted that organic matter content and accumulation rate at the seafloor attenuate with increasing water depth. However, hadal trenches, which represent the deepest portion of the hydrosphere on Earth, do not abide by this universal rule. It has been speculated that hadal trenches would serve as organic matter depocenters, where bacteria-mediated organic matter degradation intensifies. Here we examine the contents of total...

  • Highlighted Publication Typical bleaching in October 2005 on the fringing reef inside Bahia Almirante, Bocas del Toro.
    Neal B.P, Khen A., Treibitz T., Beijbom O., O'Connor G., Coffroth M.A, Knowlton N, Kriegman D., Mitchell B.G, Kline DI.  2017.  Caribbean massive corals not recovering from repeated thermal stress events during 2005-2013. Ecology and Evolution. 7:1339-1353.
    Abstract Summary:

    Massive coral bleaching events associated with high sea surface temperatures are forecast to become more frequent and severe in the future due to climate change. Monitoring colony recovery from bleaching disturbances over multiyear time frames is important for improving predictions of future coral community changes. However, there are currently few multiyear studies describing long-term outcomes for coral colonies following acute bleaching...

  • Kahru M, Lee Z.P, Mitchell B.G.  2017.  Contemporaneous disequilibrium of bio-optical properties in the Southern Ocean. Geophysical Research Letters. 44:2835-2842.
    Abstract Summary:

    Significant changes in satellite-detected net primary production (NPP, mgCm(-2)d(-1)) were observed in the Southern Ocean during 2011-2016: an increase in the Pacific sector and a decrease in the Atlantic sector. While no clear physical forcing was identified, we hypothesize that the changes in NPP were associated with changes in the phytoplankton community and reflected in the concomitant bio-optical properties. Satellite algorithms for...

  • Agarwal V, Blanton JM, Podell S, Taton A, Schorn MA, Busch J, Lin Z, Schmidt EW, Jensen PR, Paul VJ et al..  2017.  Metagenomic discovery of polybrominated diphenyl ether biosynthesis by marine sponges. Nat Chem Biol. advance online publication
    Abstract Summary:

    Naturally produced polybrominated diphenyl ethers (PBDEs) pervade the marine environment and structurally resemble toxic man-made brominated flame retardants. PBDEs bioaccumulate in marine animals and are likely transferred to the human food chain. However, the biogenic basis for PBDE production in one of their most prolific sources, marine sponges of the order Dysideidae, remains unidentified. Here, we report the discovery of PBDE...

  • Kumar N., Feddersen F.  2017.  A new offshore transport mechanism for shoreline-released tracer induced by transient rip currents and stratification. Geophysical Research Letters. 44:2843-2851.
    Abstract Summary:

    Offshore transport from the shoreline across the inner shelf of early-stage larvae and pathogens is poorly understood yet is critical for understanding larval fate and dilution of polluted shoreline water. With a novel coupling of a transient rip current (TRC) generating surf zone model and an ocean circulation model, we show that transient rip currents ejected onto a stratified inner shelf induce a new, previously unconsidered offshore...