Nitrogen fixation by the benthic freshwater cyanobacterium Lyngbya wollei

Phlips, Edward J.; Ihnat, Jean M.; Conroy, Mike

doi:10.1007/bf00010779

Cited by 30 publications

(25 citation statements)

References 23 publications

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“…Nitrogen fixation activity (nitrogenase activity) was confined to samples and treatments that contained Lyngbya majuscula, confirming earlier studies that members of this filamentous, non-heterocystous cyanobacterial genus are capable of N 2 fixation (Paerl et al 1991, Phlips et al 1991 …”

Section: Resultssupporting

confidence: 81%

“…was in suspension, it effectively utilized N and P in the presence of L. majuscula. After the apparent settling out of suspension of Karenia spp., L. majuscula continued to utilize subsequent nutrient additions.Nitrogen fixation activity (nitrogenase activity) was confined to samples and treatments that contained Lyngbya majuscula, confirming earlier studies that members of this filamentous, non-heterocystous cyanobacterial genus are capable of N 2 fixation (Paerl et al 1991, Phlips et al 1991 …”

supporting

confidence: 81%

“…The observed N and P co-stimulation of L. majuscula primary production demonstrates the potential for these nutrients to individually and jointly enhance growth of this benthic HAB, an observation that has also recently been made for L. majuscula populations in Moreton Bay, a subtropical estuarine and coastal embayment in Australia (Albert et al 2005, Ahern et al 2007). These findings further illustrate the metabolic flexibility of the genus Lyngbya, freshwater and marine species which are capable of at least partially satisfying their N requirements through N 2 fixation (Paerl et al 1991, Phlips et al 1991, Olson et al 1999, Lundgren et al 2003, Joyner et al 2008.Even though members of this genus are capable of diazotrophy, they are also capable of growth on com- Nutrient stimulation of Lyngbya majuscula primary productivity was consistently lower and much slower, relative to controls, than responses observed in Karenia spp. In part, the less profound stimulatory response in L. majuscula may have been a reflection of the inherently slower growth rates and doubling times for this benthic cyanobacterium (and filamentous cyanobacteria in general), when compared to published doubling times for diatoms, cryptophytes, and other representative eukaryotic phytoplankton taxa , Reynolds 2006.…”

mentioning

confidence: 76%

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Co-occurrence of dinoflagellate and cyanobacterial harmful algal blooms in southwest Florida coastal waters: dual nutrient (N and P) input controls

Paerl¹,

Joyner²,

Joyner³

et al. 2008

Mar. Ecol. Prog. Ser.

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During July 2006, 2 distinctly different harmful algal blooms (HABs), one dominated by the pelagic red tide dinoflagellates Karenia spp. and the other by the benthic cyanobacterium Lyngbya majuscula, occurred simultaneously in the coastal embayments surrounding Sanibel and Captiva Islands, Florida, USA. The co-occurring HABs were investigated using in situ bioassays with additions of nitrogen (N) and phosphorus (P) alone and in combination to assess nutrient controls of these 'dueling' toxin-producing species. Photosynthetic, biomass (chlorophyll a), and (in L. majuscula) nitrogen fixation responses to nutrient enrichment were examined over 4 d. Primary productivity in Karenia spp. was consistently stimulated by N additions, while P additions failed to show stimulation. When added in combination with N, P did not lead to additional stimulation above N alone. Similar patterns of chlorophyll a stimulation were observed. These patterns were observed at 2 d, after which the cells fell out of suspension. Nutrient stimulation of L. majuscula metabolic activities as well as biomass production was smaller and much slower, relative to controls, than responses observed in Karenia spp. After the demise of Karenia spp., L. majuscula was able to continue utilizing subsequent nutrient additions, and it responded most strongly to the N + P additions after 4 d. This study confirms previous estuarine and coastal studies that indicated that when non-N 2 -fixing HABs co-occur with N 2 -fixing cyanobacterial HAB species, both N and P inputs need to be carefully considered and, in all likelihood, controlled.KEY WORDS: Lyngbya · Karenia · Charlotte Harbor · Sanibel and Captiva Islands · Florida · Blooms · Nutrients Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 371: [143][144][145][146][147][148][149][150][151][152][153] 2008 species include the Florida red tide dinoflagellate Karenia brevis (Steidinger et al. 1998, Steidinger 2002, Vargo et al. 2008 and, among the cyanobacteria, the planktonic genus Trichodesmium and the benthic genus Lyngbya. While the origin of these bloomforming taxa (i.e. offshore, nearshore, estuarine) can vary substantially, there is good agreement that when these bloom species encounter nutrient-enriched conditions, growth and bloom intensity of many of these taxa may be enhanced (Paerl 1988, Lapointe 1997, Elmgren & Larsson 2001, Paerl & Fulton 2006. Accordingly, there is a great deal of concern about coastal nutrient enrichment associated with rapid rates of coastal development in Florida and elsewhere.During July 2006, 2 taxonomically and ecologically distinct harmful algal blooms (HABs), one comprised of planktonic Florida red tide dinoflagellates Karenia spp. and the other of the benthic filamentous cyanobacterium Lyngbya majuscula, co-occurred in the coastal embayments of Sanibel and Captiva Islands, on Florida's southwest coast (see Fig. 1). Both genera have been implicated in regional water quality, fisheries habitat, and human health probl...

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Section: Resultssupporting

confidence: 81%

supporting

confidence: 81%

mentioning

confidence: 76%

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Co-occurrence of dinoflagellate and cyanobacterial harmful algal blooms in southwest Florida coastal waters: dual nutrient (N and P) input controls

Paerl¹,

Joyner²,

Joyner³

et al. 2008

Mar. Ecol. Prog. Ser.

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“…This process, as also observed in a hypersaline, phosphorus limited coastal lagoon (L. Araruama, RJ), may sharply modify the water biogeochemistry (Souza, 1993). Lyngbya mats spreading over water column can produce both decaying organic matter, ammonia, and nitrate high concentrations over the estuary, releasing the nitrogen once fixed (Phlips et al, 1992;Rysgaard et al, 1994;Paerl & Pinckney, 1996). This non-heterocystous cianobacteria may present nitrogen fixation, even in the floating flocs, despite the O 2 saturation, since they mantain the mat structure, with the existence of low oxigen microzones (Wetzel, 1993;Paerl & Pinckney, 1996).…”

Section: Tablementioning

confidence: 99%

Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)

Souza

Couto

1999

Rev. Bras. Biol.

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Net pelagic metabolism (NPM) and net ecosystem metabolism (NEM) were assessed by ΣCO 2 changes in three sampling stations along Piauí River estuary. At the upper estuary station, sampling was carried out over 48 h. Samples exhibited high DIN:DIP ratios. Chlorophyll-a ranged from 0.2 to 2.5 µg.l . Bottom ressuspension due to microphytobenthic flotation and a high turbidity plume inside de estuary reflected in negative metabolic rates (mineralization). Benthic metabolism was inferred by net system minus pelagic metabolism. Microphytobenthic community seems to be the main responsible for system metabolism, specially in the upper estuary, although the anthropogenic inputs exert strong long term influence.Key words: estuary, short-term changes, primary production, mineralization, microphytobenthos. RESUMO

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“…Additionally, Lyngbya spp. can fix nitrogen under anaerobic conditions in the benthos (Phlips et al 1992). Therefore, the nutrient composition of primary producers can affect shallow areas where macrophytes are more abundant, but also cycling throughout the lake.…”

Section: Nutrient Composition Of Leachatesmentioning

confidence: 99%

Microbial bioavailability of dissolved organic carbon from leachates of freshwater autotrophs

Shivers¹,

Opsahl²,

Covich³

2016

Aquat. Microb. Ecol.

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The concentration and bioavailability of dissolved organic carbon (DOC) released during senescence of aquatic vegetation varies among autotrophs, and the corresponding response by microbial communities depends on DOC bioavailability. To evaluate microbial response to different leachate sources, experiments that measured O 2 consumption, utilization of DOC and monosaccharides, and the specific absorbance of light at 350 nm (SUVA350) were conducted on leachates from 3 primary producers. Specific absorbance at 350 nm (SUVA350) increased in 2 of 3 experiments. Increases in SUVA350 are consistent with the preferential use of labile DOC with a lower SUVA350. However, similar patterns of monosaccharide and DOC utilization do not support the hypothesis of preferential usage of labile carbohydrates over bulk DOC by the microbial community over the 8 d study. Monosaccharides appear to represent only a portion of a larger pool of labile DOC constituents that are found in autotrophic leachates that can be taken up more rapidly than metabolized by microbial communities. O 2 consumption by the microbial community varied significantly among leachate types but was relatively high during the early phase of the experiments in all leachates. Similarly, DOC uptake was relatively rapid during the early phase of the experiments. The microbial uptake of DOC relative to the consumption of dissolved oxygen, expressed as a ratio, ranged from 2.31 to 3.95 during the initial 24 h period but approached 1:1 over the duration of the experiment. These ratios suggest that 'luxury uptake' of DOC by microbial communities might have occurred in the initial phase of the experiment.

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Nitrogen fixation by the benthic freshwater cyanobacterium Lyngbya wollei

Cited by 30 publications

References 23 publications

Co-occurrence of dinoflagellate and cyanobacterial harmful algal blooms in southwest Florida coastal waters: dual nutrient (N and P) input controls

Co-occurrence of dinoflagellate and cyanobacterial harmful algal blooms in southwest Florida coastal waters: dual nutrient (N and P) input controls

Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)

Microbial bioavailability of dissolved organic carbon from leachates of freshwater autotrophs

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