Full Text Journal Articles by
Author Joshua A Haslun

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In Situ Quantification of Biological N2 Production Using Naturally Occurring 15N15N.

Laurence Y Yeung, Joshua A Haslun, Nathaniel E Ostrom, Tao Sun, Edward D Young, Maartje A H J van Kessel, Sebastian Lücker, Mike S M Jetten,

We describe an approach for determining biological N<sub>2</sub> production in soils based on the proportions of naturally occurring <sup>15</sup>N<sup>15</sup>N in N<sub>2</sub>. Laboratory incubation experiments reveal that biological N<sub>2</sub> production, whether by denitrification or anaerobic ammonia oxidation, yields proportions of <sup>15</sup>N<sup>15</sup>N in N<sub>2</sub> that are within 1‰ of that predicted for ... Read more >>

Environ Sci Technol (Environmental science & technology)
[2019, 53(9):5168-5175]

Cited: 0 times

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Nitrous oxide from chemodenitrification: A possible missing link in the Proterozoic greenhouse and the evolution of aerobic respiration.

Chloe L Stanton, Christopher T Reinhard, James F Kasting, Nathaniel E Ostrom, Joshua A Haslun, Timothy W Lyons, Jennifer B Glass,

The potent greenhouse gas nitrous oxide (N2 O) may have been an important constituent of Earth's atmosphere during Proterozoic (~2.5-0.5 Ga). Here, we tested the hypothesis that chemodenitrification, the rapid reduction of nitric oxide by ferrous iron, would have enhanced the flux of N2 O from ferruginous Proterozoic seas. We empirically ... Read more >>

Geobiology (Geobiology)
[2018, 16(6):597-609]

Cited: 2 times

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Extreme enrichment in atmospheric 15N15N.

Laurence Y Yeung, Shuning Li, Issaku E Kohl, Joshua A Haslun, Nathaniel E Ostrom, Huanting Hu, Tobias P Fischer, Edwin A Schauble, Edward D Young,

Molecular nitrogen (N2) comprises three-quarters of Earth's atmosphere and significant portions of other planetary atmospheres. We report a 19 per mil (‰) excess of 15N15N in air relative to a random distribution of nitrogen isotopes, an enrichment that is 10 times larger than what isotopic equilibration in the atmosphere allows. ... Read more >>

Sci Adv (Science advances)
[2017, 3(11):eaao6741]

Cited: 2 times

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Site-specific variation in gene expression from Symbiodinium spp. associated with offshore and inshore Porites astreoides in the lower Florida Keys is lost with bleaching and disease stress.

Briana Hauff Salas, Joshua A Haslun, Kevin B Strychar, Peggy H Ostrom, James M Cervino,

Scleractinian coral are experiencing unprecedented rates of mortality due to increases in sea surface temperatures in response to global climate change. Some coral species however, survive high temperature events due to a reduced susceptibility to bleaching. We investigated the relationship between bleaching susceptibility and expression of five metabolically related genes ... Read more >>

PLoS One (PloS one)
[2017, 12(3):e0173350]

Cited: 1 time

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Genetically divergent Symbiodinium sp. display distinct molecular responses to pathogenic Vibrio and thermal stress.

Briana Hauff, James M Cervino, Joshua A Haslun, Nancy Krucher, Andrew M Wier, Alexandra L Mannix, Konrad Hughen, Kevin B Strychar,

Global climate change and anthropogenic activities are threatening the future survival of coral reef ecosystems. The ability of reef-building zooxanthellate coral to survive these stressors may be determined through fundamental differences within their symbiotic dinoflagellates (Symbiodinium sp.). We define the in vitro apoptotic response of 2 evolutionarily distant Symbiodinium sp., ... Read more >>

Dis Aquat Organ (Diseases of aquatic organisms)
[2014, 112(2):149-159]

Cited: 1 time

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Ulcerated yellow spot syndrome: implications of aquaculture-related pathogens associated with soft coral Sarcophyton ehrenbergi tissue lesions.

James M Cervino, Briana Hauff, Joshua A Haslun, Kathryn Winiarski-Cervino, Michael Cavazos, Pamela Lawther, Andrew M Wier, Konrad Hughen, Kevin B Strychar,

We introduce a new marine syndrome called ulcerated yellow spot, affecting the soft coral Sarcophyton ehrenbergi. To identify bacteria associated with tissue lesions, tissue and mucus samples were taken during a 2009 Indo-Pacific research expedition near the Wakatobi Island chain, Indonesia. Polymerase chain reaction targeting the 16S rDNA gene indicated ... Read more >>

Dis Aquat Organ (Diseases of aquatic organisms)
[2012, 102(2):137-148]

Cited: 4 times

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Development of gene expression markers of acute heat-light stress in reef-building corals of the genus Porites.

Carly D Kenkel, Galina Aglyamova, Ada Alamaru, Ranjeet Bhagooli, Roxana Capper, Ross Cunning, Amanda deVillers, Joshua A Haslun, Laetitia Hédouin, Shashank Keshavmurthy, Kristin A Kuehl, Huda Mahmoud, Elizabeth S McGinty, Phanor H Montoya-Maya, Caroline V Palmer, Raffaella Pantile, Juan A Sánchez, Tom Schils, Rachel N Silverstein, Logan B Squiers, Pei-Ciao Tang, Tamar L Goulet, Mikhail V Matz,

Coral reefs are declining worldwide due to increased incidence of climate-induced coral bleaching, which will have widespread biodiversity and economic impacts. A simple method to measure the sub-bleaching level of heat-light stress experienced by corals would greatly inform reef management practices by making it possible to assess the distribution of ... Read more >>

PLoS One (PloS one)
[2011, 6(10):e26914]

Cited: 36 times

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