Seasonal distribution of bacteria in salt marsh sediments in North Carolina

Rublee, Parke A.

doi:10.1016/0272-7714(82)90037-3

Cited by 80 publications

(47 citation statements)

References 12 publications

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“…Hennes & Suttle (1995) demonstrated this scenario is unlikely to occur with water-column samples. However, it was appropriate to test this possibihty using pore water given that sediments contain high numbers of bacteria (Rublee 1982), a potential source of dissolved DNA. VLP counts were compared between pore-water samples treated with the DNA-degrading enzyme Deoxyribonuclease I (DNase I) and controls.…”

Section: Methodsmentioning

confidence: 99%

Vertical profiles of virus-like particles and bacteria in the water column and sediments of Chesapeake Bay

Drake¹,

Choi²,

Haskell³

et al. 1998

Aquat. Microb. Ecol.

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Vertical profiles of virus-like particles (VLPs] and bacteria were determined by near-synoptic sampling through the water column and 15 to 25 cm into the sediment at 5 stations across the mouth of Chesapeake Bay, USA. VLPs were about 10 times more abundant in the pore water (grand mean = 3.6 X 10' VLPs ml-l) than in the water column (grand mean = 3.8 X 107 VLPs ml-l). Similarly, bacteria counts were about 3 tmes higher in the pore water (grand mean = 6.5 X 10' bacteria ml-l) than in the water column (grand mean = 2.4 X 106 bacteria ml-l). The virus to bacteria ratio (VBR) was greater in the pore water (range = 29 to 85) than in the water column (range = 12 to 17). The VBR was lowest in the water-over-boxcore samples and variable in the pore water. Counts of VLPs and bacteria were positively correlated in the water column, although neither was correlated to chlorophyll a. In the water column, VLP and bacteria counts exhibited significant differences among stations, with the highest values on the southern side of the Bay mouth. In the pore water, VLP abundance varied with depth and was negatively correlated to grain size. Bacteria abundance was highest at the sediment-water interface, decreased in the first cm of sediment, was uniform in the deeper horizons, and showed no significant relationship with grain size. Bacteria counts in pore water were not significantly different among stations. In contrast, VLP abundances in pore water were significantly different among stations, although they did not increase in abundance from north to south across the Bay mouth, as did counts of water-column VLPs. These are the first data ind~cating the abundance of VLPs below the surface layer of sediment In aquatic systems and demonstrate that VLPs are components of the sedimentary microbial community to at least 25 cm depth.

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Section: Methodsmentioning

confidence: 99%

Vertical profiles of virus-like particles and bacteria in the water column and sediments of Chesapeake Bay

Drake¹,

Choi²,

Haskell³

et al. 1998

Aquat. Microb. Ecol.

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“…This can in turn be correlated with seasonal increases in sediment microbial productivity (Rublee 1982), ultimately benefiting deposit-feeding communities. In the presence of N. diversicolor, S. anglica plants lost a significantly higher proportion of their weight over the course of the experiment compared with plants in plots from which N. diversicolor had been excluded.…”

Section: Field Studiesmentioning

confidence: 99%

Remedial habitat creation: does Nereis diversicolor play a confounding role in the colonisation and establishment of the pioneering saltmarsh plant, Spartina anglica ?

Emmerson¹

2000

Helgoland Marine Research

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Increasing concerns over global warming and expected sea level rises have led to the adoption of new coastal management strategies around the south-east coast of England. This paper explores the role played by the estuarine invertebrate Nereis diversicolor in limiting the colonisation and establishment of the invasive pioneering salt marsh plant, Spartina anglica. The biology of N. diversicolor is briefly reviewed and data from field experiments are presented demonstrating significant negative effects of worm abundance on transplanted S. anglica biomass. Laboratory-based experiments demonstrated significant negative effects of N. diversicolor abundance on the survival of S. anglica seeds transplanted to sediment cores. The importance of estuarine invertebrates in engineering the mudflat habitat may confound the foreseen ecosystem services and function provided by saltmarsh management schemes.

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“…decaying dedead organic matter) serves as an important source of energy and nutrients in many aquatic and terrestrial food webs (Polis & Strong 1996, Moore et al 2004. Detritus is directly consumed by some detritivores (Findlay & Tenore 1982) or is the indirect source of nutrition for other organisms that consume microorganisms stimulated by detrital breakdown (Rublee 1982). Detritivores are in turn eaten by secondary consumers that fuel higher trophic levels (e.g.…”

Section: Introductionmentioning

confidence: 99%

Impacts of detritus from the invasive alga Caulerpa taxifolia on a soft sediment community

Taylor¹,

Bishop²,

Kelaher³

et al. 2010

Mar. Ecol. Prog. Ser.

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Invasive primary producers can dramatically reorganize food webs through detrital subsidies. This study assessed (1) contributions of the invasive alga Caulerpa taxifolia to detrital resources of temperate Australian estuaries, and (2) effects of these contributions on sedimentdwelling invertebrates. In an invaded estuary, sampling of an intertidal shore indicated C. taxifolia fragments were consistently present in organic matter deposits and were particularly abundant following storms. Sampling of the alga across 6 invaded estuaries showed that the ratio of organic carbon to nitrogen (C:N) in fresh tissue varied between 7 and 16. To determine how C. taxifolia detritus influences benthic macrofaunal assemblages and whether this influence depends on the quantity and C:N ratio of C. taxifolia detritus, a manipulative field experiment was performed. On a sheltered intertidal mudflat, 0.25 m 2 plots of sediment were experimentally enriched with either a high (90 g DW) or low (30 g) loading of high C:N (14) or low C:N (7) C. taxifolia detritus. Experimental enrichment negatively affected the total abundance and species richness of macroinvertebrates relative to controls, and these effects increased with detrital loading. For some macrofauna, reducing the C:N ratio tended to exacerbate negative effects on abundances, whereas it moderated these effects for other species. Given that organic matter derived from invasive species can be transported beyond the distribution of live invaders, greater consideration should be given to the potential broad-scale effects of invasive primary producers on detrital pathways. KEY WORDS: Detritus · Caulerpa taxifolia · Food quality · Invasion · Nitrogen content · Spatial subsidy Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 420: [73][74][75][76][77][78][79][80][81] 2010 sources, typically degrades rapidly and produces a short-term nutritional source to fast growing consumers (Tenore 1977). Although the C:N ratio of detritus can change during degradation (Anderson 1973, Suberkropp et al. 1976, the starting C:N ratio is a good predictor of decomposition rate (Enriquez et al. 1993).Invasive primary producers are an increasingly large component of detrital pools (Kennedy & Hobbie 2004, Rodil et al. 2008 and have the potential to markedly alter their value. Many successful invaders have rapid individual growth, early maturity, a short life span, high fecundity, minimal structural defence and extensive dispersal capacity (Lodge 1993, Schaffelke et al. 2006. Consequently, invasive primary producers tend to generate large amounts of labile detritus with a low C:N ratio, which is more readily decomposed than is litter from native species (Vitousek et al. 1987, Ashton et al. 2005. Whereas small amounts of refractory detritus may fuel productivity, large quantities of labile detritus may induce sediment anoxia (Pearson & Rosenberg 1978). This phenomenon may be exacerbated in areas of nutrient enrichment where invasive primary producer...

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Seasonal distribution of bacteria in salt marsh sediments in North Carolina

Cited by 80 publications

References 12 publications

Vertical profiles of virus-like particles and bacteria in the water column and sediments of Chesapeake Bay

Vertical profiles of virus-like particles and bacteria in the water column and sediments of Chesapeake Bay

Remedial habitat creation: does Nereis diversicolor play a confounding role in the colonisation and establishment of the pioneering saltmarsh plant, Spartina anglica ?

Impacts of detritus from the invasive alga Caulerpa taxifolia on a soft sediment community

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