<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Haas, A. F.</style></author><author><style face="normal" font="default" size="100%">Nelson, C. E.</style></author><author><style face="normal" font="default" size="100%">Wegley-Kelly, L.</style></author><author><style face="normal" font="default" size="100%">Carlson, C. A.</style></author><author><style face="normal" font="default" size="100%">Rohwer, F.</style></author><author><style face="normal" font="default" size="100%">Leichter, J. J.</style></author><author><style face="normal" font="default" size="100%">Wyatt, A.</style></author><author><style face="normal" font="default" size="100%">Smith, J. E.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Effects of coral reef benthic primary producers on dissolved organic carbon and microbial activity.</style></title><secondary-title><style face="normal" font="default" size="100%">PLoS One</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">MCR</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><volume><style face="normal" font="default" size="100%">6</style></volume><pages><style face="normal" font="default" size="100%">e27973</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Benthic primary producers in marine ecosystems may significantly alter biogeochemical cycling and microbial processes in their surrounding environment. To examine these interactions, we studied dissolved organic matter release by dominant benthic taxa and subsequent microbial remineralization in the lagoonal reefs of Moorea, French Polynesia. Rates of photosynthesis, respiration, and dissolved organic carbon (DOC) release were assessed for several common benthic reef organisms from the backreef habitat. We assessed microbial community response to dissolved exudates of each benthic producer by measuring bacterioplankton growth, respiration, and DOC drawdown in two-day dark dilution culture incubations. Experiments were conducted for six benthic producers: three species of macroalgae (each representing a different algal phylum: Turbinaria ornata – Ochrophyta; Amansia rhodantha – Rhodophyta; Halimeda opuntia – Chlorophyta), a mixed assemblage of turf algae, a species of crustose coralline algae (Hydrolithon reinboldii) and a dominant hermatypic coral (Porites lobata). Our results show that all five types of algae, but not the coral, exuded significant amounts of labile DOC into their surrounding environment. In general, primary producers with the highest rates of photosynthesis released the most DOC and yielded the greatest bacterioplankton growth; turf algae produced nearly twice as much DOC per unit surface area than the other benthic producers (14.0±2.8 µmol h?1 dm?2), stimulating rapid bacterioplankton growth (0.044±0.002 log10 cells h?1) and concomitant oxygen drawdown (0.16±0.05 µmol L?1 h?1 dm?2). Our results demonstrate that benthic reef algae can release a significant fraction of their photosynthetically-fixed carbon as DOC, these release rates vary by species, and this DOC is available to and consumed by reef associated microbes. These data provide compelling evidence that benthic primary producers differentially influence reef microbial dynamics and biogeochemical parameters (i.e., DOC and oxygen availability, bacterial abundance and metabolism) in coral reef communities.</style></abstract><issue><style face="normal" font="default" size="100%">11</style></issue><accession-num><style face="normal" font="default" size="100%">LTER.2011-86905</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hofmann, G. E.</style></author><author><style face="normal" font="default" size="100%">Takeshita, Y.</style></author><author><style face="normal" font="default" size="100%">Matson, P. G.</style></author><author><style face="normal" font="default" size="100%">Crook, E. D.</style></author><author><style face="normal" font="default" size="100%">Kroeker, K. J.</style></author><author><style face="normal" font="default" size="100%">Gambi, M. C.</style></author><author><style face="normal" font="default" size="100%">Rivest, E. B.</style></author><author><style face="normal" font="default" size="100%">Frieder, C. A.</style></author><author><style face="normal" font="default" size="100%">Yu, P. C.</style></author><author><style face="normal" font="default" size="100%">Martz, T.R.</style></author><author><style face="normal" font="default" size="100%">Martz, T.R.</style></author><author><style face="normal" font="default" size="100%">Smith, J. E.</style></author><author><style face="normal" font="default" size="100%">Johnson, K. S.</style></author><author><style face="normal" font="default" size="100%">Send, U</style></author><author><style face="normal" font="default" size="100%">Levin, L.A.</style></author><author><style face="normal" font="default" size="100%">Micheli, F.</style></author><author><style face="normal" font="default" size="100%">Paytan, A.</style></author><author><style face="normal" font="default" size="100%">Price, N. N.</style></author><author><style face="normal" font="default" size="100%">Peterson, B.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">High-frequency dynamics of ocean pH: a Multi-ecosystem comparison.</style></title><secondary-title><style face="normal" font="default" size="100%">PloS One</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">MCR</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><volume><style face="normal" font="default" size="100%">6</style></volume><pages><style face="normal" font="default" size="100%">e28983</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The effect of Ocean Acidification (OA) on marine biota is quasi-predictable at best.  While perturbation studies, in the form of incubations under elevated pCO2, reveal sensitivities and responses of individual species, one missing link in the OA story results from a chronic lack of pH data specific to a given species' natural habitat.  Here, we present a compilation of continuous, high-resolution time series of upper ocean pH, collected using autonomous sensors, over a variety of ecosystems ranging from polar to tropical, open-ocean to coastal, kelp forest to coral reef.  These observations reveal a continuum of month long pH variability with standard deviationsfrom 0.004 to 0.277 and ranges spanning 0.024 to 1.430 pH units.  The nature of the observed variability was also highly site-dependent, with characteristic diel, semi-diurnal, and stochastic patterns of varying amplitudes. These biome-specific pH signatures disclose current levels of exposure to both high and low dissolved CO2,often demonstrating that resident organisms are already experiencing pH regimes that are not predicted until 2100.  Our data provide a first step toward crystallizing the biophysical link between environmental history of pH exposure and physiological resilience of marine organisms to fluctuations in seawater CO2.  Knowledge of this spatial and temporal variation in seawater chemistry allows us to improve the design of OA experiments: we can test organisms with a priori expectations of their tolerance guardrails, based on their natural range of exposure.  Such hypothesis-testing will provide a deeper understanding of the effects of OA.  Both intuitively simple to understand and powerfully informative, these and similar comparative time series can help guide management efforts to identify areas of marine habitat that can serve as refugia to acidification as well as areas that are particularly vulnerable to future ocean change.</style></abstract><issue><style face="normal" font="default" size="100%">12</style></issue><accession-num><style face="normal" font="default" size="100%">LTER.2011-86904</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Lilleskov, E.</style></author><author><style face="normal" font="default" size="100%">Callaham, M.A.</style></author><author><style face="normal" font="default" size="100%">Pouyat, R.</style></author><author><style face="normal" font="default" size="100%">Smith, J. E.</style></author><author><style face="normal" font="default" size="100%">Castellano, M.</style></author><author><style face="normal" font="default" size="100%">Gonzalez, G.</style></author><author><style face="normal" font="default" size="100%">Lodge, D. J.</style></author><author><style face="normal" font="default" size="100%">Arango, R.</style></author><author><style face="normal" font="default" size="100%">Green, F.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Invasive soil organisms and their effects on belowground processes</style></title><secondary-title><style face="normal" font="default" size="100%">A Dynamic Invasive Species Research Vision: Opportunities and Priorities</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">LUQ</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://luq.lternet.edu/publications/lterpub/lillinva.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">29</style></volume><pages><style face="normal" font="default" size="100%">67-83</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.2009-86037</style></accession-num></record></records></xml>