Kinetic characterisation of an enriched Nitrospira culture with comparison to Nitrobacter

Blackburne, Richard; Vadivelu, Vel Murugan; Yuan, Zhiguo; Keller, Jürg

doi:10.1016/j.watres.2007.01.043

Cited by 338 publications

(185 citation statements)

References 36 publications

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“…The composition of nitrifiers could be indexes of carbon and nitrogen cycles in oceanic ecosystem because NH 4 + is provided by nitrogenous organic matter decomposition. In addition, it has been noted that the niche separation of nitrifiers is regulated by the amount of available electron donors such as ammonia and nitrite (28)(29)(30). Thus, the niche separation of nitrifiers could be a signature of NH 4 + flux from organic matter decomposition that cannot be identified from NH 4 + concentration measurements.…”

Section: Discussionmentioning

confidence: 99%

Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth

Nunoura

Takaki

Hirai

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

251

314

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Hadal oceans at water depths below 6,000 m are the least-explored aquatic biosphere. The Challenger Deep, located in the western equatorial Pacific, with a water depth of ∼11 km, is the deepest ocean on Earth. Microbial communities associated with waters from the sea surface to the trench bottom (0 ∼10,257 m) in the Challenger Deep were analyzed, and unprecedented trench microbial communities were identified in the hadal waters (6,000 ∼10,257 m) that were distinct from the abyssal microbial communities. The potentially chemolithotrophic populations were less abundant in the hadal water than those in the upper abyssal waters. The emerging members of chemolithotrophic nitrifiers in the hadal water that likely adapt to the higher flux of electron donors were also different from those in the abyssal waters that adapt to the lower flux of electron donors. Species-level niche separation in most of the dominant taxa was also found between the hadal and abyssal microbial communities. Considering the geomorphology and the isolated hydrotopographical nature of the Mariana Trench, we hypothesized that the distinct hadal microbial ecosystem was driven by the endogenous recycling of organic matter in the hadal waters associated with the trench geomorphology.hadal | trench | niche separation | nitrification | Challenger Deep

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Section: Discussionmentioning

confidence: 99%

Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth

Nunoura

Takaki

Hirai

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

251

314

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“…Similar observations were made by Antoniou et al [45], who report the overall nitrification pH of approximately 7.8. There are three major bacteria, for which optimal pH conditions are as follows: (1) Nitrobacter: 7.5 [46]; (2) Nitrosomonas: 7.0-7.5 [47], and (3) Nitrospira: 8.0-8.3 [48].…”

Section: Ph Stabilizationmentioning

confidence: 99%

Challenges of Sustainable and Commercial Aquaponics

et al. 2015

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Abstract:The world is facing a number of serious problems of which population rise, climate change, soil degradation, water scarcity and food security are among the most important. Aquaponics, as a closed loop system consisting of hydroponics and aquaculture elements, could contribute to addressing these problems. However, there is a lack of quantitative research to support the development of economically feasible aquaponics systems. Although many studies have addressed some scientific aspects, there has been limited focus on commercial implementation. In this review paper, opportunities that have the potential to fill the gap between research and implementation of commercial aquaponic systems have been identified. The analysis shows that aquaponics is capable of being an important driver for the development of integrated food production systems. Arid regions suffering from water stress will particularly benefit from this technology being operated in a commercial environment. OPEN ACCESSSustainability 2015, 7 4200

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“…NH 3 initiated inhibition on Nitrobacter respiration at below 1 mg l −1 (Vadivelu et al 2007). Nitrospira strains had a lower inhibition threshold concentration for NH 3 (between 0.04 and 0.08 mg l −1 ) than Nitrobacter species (Blackburne et al 2007). Compared to Lake Houguan and Lake Baoan, Lake Yuehu and Lake Dianchi showed the significantly higher NH 3 concentrations (0.156 and 0.522 mg l −1 ), together with higher pH values (9.21 and 9.42) that facilitate the substantial increase in NH 3 concentrations.…”

Section: Discussionmentioning

confidence: 92%

Adverse Effects of Ammonia on Nitrification Process: the Case of Chinese Shallow Freshwater Lakes

Chen

Cao

Song

et al. 2009

Water Air Soil Pollut

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Nitrification is a process in which ammonia is oxidized to nitrite (NO 2 − ) that is further oxidized to nitrate (NO 3 − ). The relations between these two steps and ambient ammonia concentrations were studied in surface water of Chinese shallow lakes with different trophic status. For the oxidations of both ammonia and NO 2 − , more eutrophic lakes generally showed significantly higher potential and actual rates, which was linked with excessive ammonia concentrations. Additionally, both potential and actual rates for ammonia oxidation were higher than those for NO 2 − oxidation in the more eutrophic lakes, while in the lakes with lower trophic status, both potential and actual rates for ammonia oxidation were almost equivalent to those for NO 2 − oxidation. This can be explained by the excessive unionized ammonia (NH 3 ) concentration that inhibits nitrite-oxidizing bacteria in the more eutrophic lakes. The laboratory experiment with different ammonia concentrations, using the surface water in a eutrophic lake, showed that ammonia oxidation rates were proportional to the ammonia concentrations, but NO 2 − oxidation rates did not increase in parallel. Furthermore, NO 2 − oxidation was less associated with particles in natural water of the studied lakes. Without effective protection, it would be selectively inhibited by the excessive ammonia in hypereutrophic lakes, resulting in NO 2 − accumulation.Shortly, the increased concentrations of ammonia cause a misbalance between the NO 2 − -producing and the NO 2 − -consuming processes, thereby exacerbating the lake eutrophication.

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Kinetic characterisation of an enriched Nitrospira culture with comparison to Nitrobacter

Cited by 338 publications

References 36 publications

Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth

Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth

Challenges of Sustainable and Commercial Aquaponics

Adverse Effects of Ammonia on Nitrification Process: the Case of Chinese Shallow Freshwater Lakes

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