@article{
 title = {Dinitrogen fixation and primary productivity by carbonate and silicate reef sand communities of the Northern Red Sea},
 type = {article},
 year = {2015},
 identifiers = {[object Object]},
 keywords = {Acetylene reduction,Carbonate sand,Gulf of aqaba,Microphytobenthos,Oxygen fluxes,Photosynthesis,Seasonality,Silicate sand},
 volume = {527},
 id = {e4ddcf6f-6445-319c-9b87-eb76fab12bfa},
 created = {2017-12-21T15:46:52.007Z},
 file_attached = {false},
 profile_id = {b14f101e-5638-3ed1-9452-cb3610dc9948},
 last_modified = {2017-12-21T15:46:52.007Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {© Inter-Research 2015. Permeable sediments are highly bioactive compartments in coral reefs. The associated dense microbial communities sustain fast degradation of organic matter, thereby playing a key role in nutrient recycling within the reef. Besides nutrient recycling, new nutrients (i.e. nitrogen) are acquired by dinitrogen (N < inf > 2 < /inf > ) fixing microbial communities, but knowledge about the influence of sand mineralogy and key environmental factors on this process is scarce. Therefore, this study quantified seasonal N < inf > 2 < /inf >  fixation (via acetylene reduction) along with gross photosynthesis (via O < sup > 2 < /sup >  fluxes) by adjacent carbonate and silicate sands in a Northern Red Sea coral reef. Findings revealed significantly higher N < inf > 2 < /inf >  fixation in carbonate than in silicate sands (2.88 and 1.52 nmol C < inf > 2 < /inf > H < inf > 4 < /inf >  cm < sup > -2 < /sup >  h < sup > -1 < /sup > , respectively) and a more pronounced seasonal response in the former, likely caused by its higher permeability, grain size and microbial abundance. Ambient light and organic matter availability were the main controlling environmental factors for sand-associated N < inf > 2 < /inf >  fixation. Carbonate and silicate sands showed similar gross photosynthesis rates (270 and 233 nmol O < inf > 2 < /inf >  cm < sup > -2 < /sup >  h < sup > -1 < /sup > ) that positively (carbonate sands) or negatively (silicate sands) correlated with N < inf > 2 < /inf >  fixation, likely due to different diazotrophic communities. Seasonal appearance of microbial mats on carbonate sands increased N2 fixation and gross photosynthesis by up to one order of mag nitude. On an annual average, carbonate and silicate sands obtain ∼8% and microbial mat communities obtain ∼13% of their photo-metabolic N demand via N < inf > 2 < /inf >  fixation.},
 bibtype = {article},
 author = {Bednarz, V.N. and Van Hoytema, N. and Cardini, U. and Naumann, M.S. and Al-Rshaidat, M.M.D. and Wild, C.},
 journal = {Marine Ecology Progress Series}
}

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Permeable sediments are highly bioactive compartments in coral reefs. The associated dense microbial communities sustain fast degradation of organic matter, thereby playing a key role in nutrient recycling within the reef. Besides nutrient recycling, new nutrients (i.e. nitrogen) are acquired by dinitrogen (N < inf > 2 < /inf > ) fixing microbial communities, but knowledge about the influence of sand mineralogy and key environmental factors on this process is scarce. Therefore, this study quantified seasonal N < inf > 2 < /inf > fixation (via acetylene reduction) along with gross photosynthesis (via O < sup > 2 < /sup > fluxes) by adjacent carbonate and silicate sands in a Northern Red Sea coral reef. Findings revealed significantly higher N < inf > 2 < /inf > fixation in carbonate than in silicate sands (2.88 and 1.52 nmol C < inf > 2 < /inf > H < inf > 4 < /inf > cm < sup > -2 < /sup > h < sup > -1 < /sup > , respectively) and a more pronounced seasonal response in the former, likely caused by its higher permeability, grain size and microbial abundance. Ambient light and organic matter availability were the main controlling environmental factors for sand-associated N < inf > 2 < /inf > fixation. Carbonate and silicate sands showed similar gross photosynthesis rates (270 and 233 nmol O < inf > 2 < /inf > cm < sup > -2 < /sup > h < sup > -1 < /sup > ) that positively (carbonate sands) or negatively (silicate sands) correlated with N < inf > 2 < /inf > fixation, likely due to different diazotrophic communities. Seasonal appearance of microbial mats on carbonate sands increased N2 fixation and gross photosynthesis by up to one order of mag nitude. On an annual average, carbonate and silicate sands obtain ∼8% and microbial mat communities obtain ∼13% of their photo-metabolic N demand via N < inf > 2 < /inf > fixation.","bibtype":"article","author":"Bednarz, V.N. and Van Hoytema, N. and Cardini, U. and Naumann, M.S. and Al-Rshaidat, M.M.D. and Wild, C.","journal":"Marine Ecology Progress Series","bibtex":"@article{\n title = {Dinitrogen fixation and primary productivity by carbonate and silicate reef sand communities of the Northern Red Sea},\n type = {article},\n year = {2015},\n identifiers = {[object Object]},\n keywords = {Acetylene reduction,Carbonate sand,Gulf of aqaba,Microphytobenthos,Oxygen fluxes,Photosynthesis,Seasonality,Silicate sand},\n volume = {527},\n id = {e4ddcf6f-6445-319c-9b87-eb76fab12bfa},\n created = {2017-12-21T15:46:52.007Z},\n file_attached = {false},\n profile_id = {b14f101e-5638-3ed1-9452-cb3610dc9948},\n last_modified = {2017-12-21T15:46:52.007Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {false},\n hidden = {false},\n private_publication = {false},\n abstract = {© Inter-Research 2015. Permeable sediments are highly bioactive compartments in coral reefs. The associated dense microbial communities sustain fast degradation of organic matter, thereby playing a key role in nutrient recycling within the reef. Besides nutrient recycling, new nutrients (i.e. nitrogen) are acquired by dinitrogen (N < inf > 2 < /inf > ) fixing microbial communities, but knowledge about the influence of sand mineralogy and key environmental factors on this process is scarce. Therefore, this study quantified seasonal N < inf > 2 < /inf > fixation (via acetylene reduction) along with gross photosynthesis (via O < sup > 2 < /sup > fluxes) by adjacent carbonate and silicate sands in a Northern Red Sea coral reef. Findings revealed significantly higher N < inf > 2 < /inf > fixation in carbonate than in silicate sands (2.88 and 1.52 nmol C < inf > 2 < /inf > H < inf > 4 < /inf > cm < sup > -2 < /sup > h < sup > -1 < /sup > , respectively) and a more pronounced seasonal response in the former, likely caused by its higher permeability, grain size and microbial abundance. Ambient light and organic matter availability were the main controlling environmental factors for sand-associated N < inf > 2 < /inf > fixation. Carbonate and silicate sands showed similar gross photosynthesis rates (270 and 233 nmol O < inf > 2 < /inf > cm < sup > -2 < /sup > h < sup > -1 < /sup > ) that positively (carbonate sands) or negatively (silicate sands) correlated with N < inf > 2 < /inf > fixation, likely due to different diazotrophic communities. Seasonal appearance of microbial mats on carbonate sands increased N2 fixation and gross photosynthesis by up to one order of mag nitude. On an annual average, carbonate and silicate sands obtain ∼8% and microbial mat communities obtain ∼13% of their photo-metabolic N demand via N < inf > 2 < /inf > fixation.},\n bibtype = {article},\n author = {Bednarz, V.N. and Van Hoytema, N. and Cardini, U. and Naumann, M.S. and Al-Rshaidat, M.M.D. and Wild, C.},\n journal = {Marine Ecology Progress Series}\n}","author_short":["Bednarz, V.","Van Hoytema, N.","Cardini, U.","Naumann, M.","Al-Rshaidat, M.","Wild, C."],"bibbaseid":"bednarz-vanhoytema-cardini-naumann-alrshaidat-wild-dinitrogenfixationandprimaryproductivitybycarbonateandsilicatereefsandcommunitiesofthenorthernredsea-2015","role":"author","urls":{},"keyword":["Acetylene reduction","Carbonate sand","Gulf of aqaba","Microphytobenthos","Oxygen fluxes","Photosynthesis","Seasonality","Silicate sand"],"downloads":0},"search_terms":["dinitrogen","fixation","primary","productivity","carbonate","silicate","reef","sand","communities","northern","red","sea","bednarz","van hoytema","cardini","naumann","al-rshaidat","wild"],"keywords":["acetylene reduction","carbonate sand","gulf of aqaba","microphytobenthos","oxygen fluxes","photosynthesis","seasonality","silicate sand"],"authorIDs":[]}