Patterns of primary production and nutrient availability in a Bahamas lagoon with fringing mangroves

Koch, Marguerite S.; Madden, Christopher J.

doi:10.3354/meps219109

Cited by 41 publications

(16 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, fish assemblages are extremely diverse (Layman et al 2004), and secondary production is relatively high (Valentine-Rose et al 2007), in tidal creeks. These factors, supported by previous research linking fish nutrient recycling and the incipient development of seagrass beds (Alevizon 2002) and nutrient content of seagrasses (Koch and Madden 2001), implicate consumers as an important nutrient source for primary producers in this system.…”

Section: Discussionsupporting

confidence: 58%

“…Fish nutrient recycling is predicted to be most important under conditions of low ambient nutrient concentrations, high nutrient demand by primary producers, and high abundance and/or diversity of fishes (Vanni 2002, McIntyre et al 2008), all of which characterize Bahamian coastal ecosystems. Shallow waters in the Bahamas are extremely oligotrophic (0.1-17 lg/L NH 4 -N, 0.3-4 lg/L TDP-P; Allgeier et al 2010, Koch andMadden 2001), and given the extensive coverage and high biomass of seagrasses, macroalgae, and epiphytic algae Madden 2001, Lapointe et al 2004), uptake rates of nutrients are presumed to be high. Additionally, fish assemblages are extremely diverse (Layman et al 2004), and secondary production is relatively high (Valentine-Rose et al 2007), in tidal creeks.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Marine fisheries declines viewed upside down: human impacts on consumer-driven nutrient recycling

Layman

Allgeier

Rosemond

et al. 2011

Ecological Applications

View full text Add to dashboard Cite

Abstract. We quantified how two human impacts (overfishing and habitat fragmentation) in nearshore marine ecosystems may affect ecosystem function by altering the role of fish as nutrient vectors. We empirically quantified size-specific excretion rates of one of the most abundant fishes (gray snapper, Lutjanus griseus) in The Bahamas and combined these with surveys of fish abundance to estimate population-level excretion rates. The study was conducted across gradients of two human disturbances: overfishing and ecosystem fragmentation (estuaries bisected by roads), to evaluate how each could result in reduced population-level nutrient cycling by consumers. Mean estimated N and P excretion rates for gray snapper populations were on average 456% and 541% higher, respectively, in unfished sites. Ecosystem fragmentation resulted in significant reductions of recycling rates by snapper, with degree of creek fragmentation explaining 86% and 72% of the variance in estimated excretion for dissolved N and P, respectively. Additionally, we used nutrient limitation assays and primary producer nutrient content to provide a simple example of how marine fishery declines may affect primary production. This study provides an initial step toward integrating marine fishery declines and consumer-driven nutrient recycling to more fully understand the implications of human impacts in marine ecosystems.

show abstract

Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Marine fisheries declines viewed upside down: human impacts on consumer-driven nutrient recycling

Layman

Allgeier

Rosemond

et al. 2011

Ecological Applications

View full text Add to dashboard Cite

show abstract

“…Although the ecological importance of AAnP remains unclear, these organisms can contribute 4 to 50% of the total bacterial production in oligotrophic waters and can represent 11% of the total microbial communities in marine waters (Koblízek et al 2001, 2007, Kolber et al 2001. Their dual phototrophic and respiratory capabilities could lead to a fitness advantage by maximizing their resources under nutrient-and carbon-limited environments such as found in the Bahamas where nutrient levels can range from 0.1 to 17 µg l −1 for NH 4 -N and 0.3 to 4 µg l −1 for TDP-P (Koch & Madden 2001). Anaerobic anoxygenic photosynthetizers such as Chloroflexi and Chlorobi were also detected mostly in the non-active and mat-stabilized sediments and, based on TRF profiles, Chlorobi may be an important member of the anoxygenic photosynthetic community in non-active and mat-stabilized areas ( Table 2).…”

Section: Discussionmentioning

confidence: 99%

Bacterial community of oolitic carbonate sediments of the Bahamas Archipelago

Diaz¹,

Piggot²,

Eberli³

et al. 2013

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The present study characterized bacterial communities associated with oolitic carbonate sediments from the Bahamas Archipelago, ranging from high-energy 'active' to lower energy 'non-active' and 'mat-stabilized' environments. Bacterial communities were analyzed using terminal restriction fragment length polymorphisms (TRFLP), clone analyses of the 16S rRNA gene, confocal laser scanning microscopy (CLSM) and the quantitative phenol-sulfuric acid assay for extracellular polymeric substances (EPS). Confocal imaging of oolitic grains stained with cyanine dye-conjugated lectin and EPS quantification demonstrated that all 3 environments harbored attached biofilm communities, but densities increased from the active to the mat-stabilized environment. Bacterial communities associated with all 3 settings were highly diverse and dominated by Proteobacteria (50 to 61%). Analysis of similarity (ANOSIM) and similarity percentages (SIMPER) revealed significant differences among the 3 environments in the relative abundance of Proteobacteria, Planctomycetes, Cyanobacteria, Chlorobi, and Deinococcus-Thermus. Bacterial primary production in the active shoal environment was associated with Rhodobacteraceae, Ectothiorhodospiraceae, and Chlorobi, whereas the lower energy environments appear to harbor a more complex consortium of aerobic photoautotrophs and anaerobic/aerobic anoxygenic phototrophs. The ubiquitousness of photosynthetizers, along with the presence of aerobic/anaerobic heterotrophic microbes (e.g. denitrifiers, sulfate-reducers, biofilm producers/degraders) and the gradient increase in biofilm production on ooid grains from active to mat-stabilized environments, support the potential involvement of these communities in biomineralization and carbonate precipitation.KEY WORDS: Ooids · Carbonate sediment · Carbonate precipitation · 16S rRNA diversity · Bacterial community · Biofilm Resale or republication not permitted without written consent of the publisher Editorial responsibility: Ronald Kiene,

show abstract

“…However, relatively few data are available on the productivity and contribution of macroalgae to the carbon budget. Moreover, macroalgae are seldom endmembers in mixing models, despite studies on the important trophic and budgeting role of macroalgae associated with mangroves (Koch and Madden, 2001), seagrasses (Heck et al, 2008) and coral reefs (Wernberg et al, 2006). A large quantity of drifting macroalgae, especially Sargassum sp., is transported passively by tides in Gazi Bay (G. Signa, personal observation, 2009;Coppejans et al, 1992) and may account for the large and widespread contribution of brown macroalgae to sediment and, in particular, to the suspended particulate organic matter pool, as revealed by detection of specific fatty acid biomarkers (18 : 1 n9 + 18 : 4 n3 + 20 : 4 n6).…”

Section: Contribution Of Other Primary Producers To the Sediment And mentioning

confidence: 99%

Small-scale variability in geomorphological settings influences mangrove-derived organic matter export in a tropical bay

et al. 2017

View full text Add to dashboard Cite

Abstract. Organic matter (OM) exchanges between adjacent habitats affect the dynamics and functioning of coastal systems, as well as the role of the different primary producers as energy and nutrient sources in food webs. Elemental (C, N, C : N) and isotope (δ 13 C) signatures and fatty acid (FA) profiles were used to assess the influence of geomorphological setting in two climatic seasons on the export and fate of mangrove OM across a tidally influenced tropical area, Gazi Bay (Kenya). The main results indicate that tidal transport, along with riverine runoff, plays a significant role in the distribution of mangrove organic matter. In particular, a marked spatial variability in the export of organic matter from mangroves to adjacent habitats was due to the different settings of the creeks flowing into the bay. Kinondo Creek acted as a mangrove retention site, where export of mangrove material was limited to the contiguous intertidal area, while Kidogoweni Creek acted as a "flow-through" system, from which mangrove material spreads into the bay, especially in the rainy season. This pattern was evident from the isotopic signature of primary producers, which were more 13 C-depleted in the Kinondo Creek and nearby, due to the lower dilution of the dissolved inorganic carbon (DIC) pool, typically depleted as an effect of intense mangrove mineralisation. Despite the trapping efficiency of the seagrass canopy, suspended particulate OM showed the important contribution of mangroves across the whole bay, up to the coral reef, as an effect of the strong ebb tide. Overall, mixing model outcomes indicated a widespread mixed contribution of both allochthonous and autochthonous OM sources across Gazi Bay. Moreover, FAs indicated a notable contribution of brown macroalgae and bacteria in both sediment and suspended pools. These results suggest that ecological connectivity in Gazi Bay is strongly influenced by geomorphological setting, which may have far-reaching consequences for the functioning of the whole ecosystem and the local food webs.

show abstract

Patterns of primary production and nutrient availability in a Bahamas lagoon with fringing mangroves

Cited by 41 publications

References 25 publications

Marine fisheries declines viewed upside down: human impacts on consumer-driven nutrient recycling

Marine fisheries declines viewed upside down: human impacts on consumer-driven nutrient recycling

Bacterial community of oolitic carbonate sediments of the Bahamas Archipelago

Small-scale variability in geomorphological settings influences mangrove-derived organic matter export in a tropical bay

Contact Info

Product

Resources

About