Increased Variability of Microbial Communities in Restored Salt Marshes nearly 30 Years After Tidal Flow Restoration

Bernhard, Anne E.; Marshall, David J.; Yiannos, Lazaros

doi:10.1007/s12237-012-9502-2

Cited by 18 publications

(25 citation statements)

References 57 publications

(5 reference statements)

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“…In the histogram for each box, the number of significantly positive (green), negative (red), and not significant (NS) (gray) observations is plotted shorelines (Gittman et al 2016a). However, the majority of observations in Box 1a were negative and included decreased species diversity and/or abundance for a wide range of assemblages including microbial communities (Bernhard et al 2012), primary producers (e.g., Sturdevant et al 2002;O'Connor et al 2011), infaunal invertebrates (e.g., Peterson et al 2000;Seitz et al 2006;Bilkovic and Mitchell 2013), nekton and fish (Bilkovic 2011;Boys et al 2012;Peterson 2014, 2015) and waterbirds (Bolduc and Afton 2003). In Box 1b, negative responses to armoring dominated the results with decreases in diversity and abundance reported for mangroves (Anthony and Gratiot 2012; Heatherington and Bishop 2012), salt marsh vegetation (Bozek and Burdick 2005), invertebrates (Seitz et al 2006;Lawless and Seitz 2014;Swamy et al 2002), and nekton and fish (e.g., Balouskus and Targett 2016;Peterson 2014, 2015).…”

Section: E2: Species Assemblagesmentioning

confidence: 99%

Generalizing Ecological Effects of Shoreline Armoring Across Soft Sediment Environments

Dugan

Emery

Alber

et al. 2017

Estuaries and Coasts

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Despite its widespread use, the ecological effects of shoreline armoring are poorly synthesized and difficult to generalize across soft sediment environments and structure types. We developed a conceptual model that scales predicted ecological effects of shore-parallel armoring based on two axes: engineering purpose of structure (reduce/slow velocities or prevent/ stop flow of waves and currents) and hydrodynamic energy (e.g., tides, currents, waves) of soft sediment environments. We predicted greater ecological impacts for structures intended to stop as opposed to slow water flow and with increasing hydrodynamic energy of the environment. We evaluated our predictions with a literature review of effects of shoreline armoring for six possible ecological responses (habitat distribution, species assemblages, trophic structure, nutrient cycling, productivity, and connectivity). The majority of studies were in low-energy environments (51 of 88), and a preponderance addressed changes in two ecological responses associated with armoring: habitat distribution and species assemblages. Across the 207 armoring effects studied, 71% were significantly negative, 22% were significantly positive, and 7% reported no significant difference. Ecological responses varied with engineering purpose of structures, with a higher frequency of negative responses for structures designed to stop water flow within a given hydrodynamic energy level. Comparisons across the hydrodynamic energy axis were less clear-cut, but negative responses prevailed (>78%) in high-energy environments. These results suggest that generalizations of ecological responses to armoring across a range of environmental contexts are possible and that the proposed conceptual model is useful for generating predictions of the direction and relative ecological impacts of shoreline armoring in soft sediment ecosystems.

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Section: E2: Species Assemblagesmentioning

confidence: 99%

Generalizing Ecological Effects of Shoreline Armoring Across Soft Sediment Environments

Dugan

Emery

Alber

et al. 2017

Estuaries and Coasts

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“…Archaeal amo A genes were quantified as described in Moin et al (2009). Bacterial 16S rRNA genes were quantified as described in Bernhard et al (2012). Average amplification efficiencies from at least three separate runs were 101.3 ± 13.3% (betaproteobacterial amo A genes), 107.4 ± 5.2% (archaeal amo A genes), and 91.7 ± 4.5% (bacterial 16S rRNA genes).…”

Section: Methodsmentioning

confidence: 99%

Differential responses of ammonia-oxidizing archaea and bacteria to long-term fertilization in a New England salt marsh

Peng¹,

Yando²,

Hildebrand³

et al. 2013

Front. Microbio.

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Since the discovery of ammonia-oxidizing archaea (AOA), new questions have arisen about population and community dynamics and potential interactions between AOA and ammonia-oxidizing bacteria (AOB). We investigated the effects of long-term fertilization on AOA and AOB in the Great Sippewissett Marsh, Falmouth, MA, USA to address some of these questions. Sediment samples were collected from low and high marsh habitats in July 2009 from replicate plots that received low (LF), high (HF), and extra high (XF) levels of a mixed NPK fertilizer biweekly during the growing season since 1974. Additional untreated plots were included as controls (C). Terminal restriction fragment length polymorphism analysis of the amoA genes revealed distinct shifts in AOB communities related to fertilization treatment, but the response patterns of AOA were less consistent. Four AOB operational taxonomic units (OTUs) predictably and significantly responded to fertilization, but only one AOA OTU showed a significant pattern. Betaproteobacterial amoA gene sequences within the Nitrosospira-like cluster dominated at C and LF sites, while sequences related to Nitrosomonas spp. dominated at HF and XF sites. We identified some clusters of AOA sequences recovered primarily from high fertilization regimes, but other clusters consisted of sequences recovered from all fertilization treatments, suggesting greater physiological diversity. Surprisingly, fertilization appeared to have little impact on abundance of AOA or AOB. In summary, our data reveal striking patterns for AOA and AOB in response to long-term fertilization, and also suggest a missing link between community composition and abundance and nitrogen processing in the marsh.

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“…Recently, molecular method-based studies have indicated that bacterial diversity in sediment has been linked with impacts of anthropogenic activities, such as increase of eutrophication and chemical pollution [9][10][11][12][13], changes in species of phytoplankton or zooplankton [14][15][16], and operating a dredging, reclamation, or remediation project [17][18][19][20]. Furthermore, some efforts have been made to study the bacterial community structure dynamics related to mariculture processes.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Mariculture on the Diversity of Bacterial Communities within Intertidal Sediments in the Northeast of China

et al. 2013

Microb Ecol

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Mariculture is one of the major seafood supplies worldwide and has caused serious environmental concerns on the coastal zone. Its rapid development has been shown to disrupt the sediment ecosystems and thus influence the benthic bacterial communities. Bacterial diversity and community structure within both adjacent farms and non-cultured zones intertidal sediments along the coasts of Qinhuangdao and Dalian, China, were investigated using full-length 16S rRNA gene-based T-RFLP analyses and clone library construction. Richness and Shannon-Wiener index were significantly increased at sites adjacent the mariculture farm with mean values of 29 and 2.97 from peak profiles of T-RFLP result. Clustering analyses suggested that impacts of mariculture on bacterial diversity of sediment were significantly larger than those resulted from temporal and spatial scales. Upon comparisons of RFLP patterns from 602 clones from libraries of the selected five samples, 137 OTUs were retrieved. Members of γ-and δ-Proteobacteria, Bacilli, Flavobacteria, and Actinobacteria were recorded in all libraries. In addition, γ-Proteobacteria were dominant in all samples (21.7~45.0 %). Redundancy analysis revealed that the distribution of bacterial composition seemed to be determined by the variables of salinity, PO 4 3− -P, NH 4 + -N, and Chlorophyll a content. The phyla of γ-Proteobacteria, Clostridia, Flavobacteria, Bacilli, and Planctomycetes were principal components to contribute to the bacterial differences of clone libraries. Our finding demonstrated that these phyla could display variations of bacterial composition linked to environmental disturbance resulted from mariculture.

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Increased Variability of Microbial Communities in Restored Salt Marshes nearly 30 Years After Tidal Flow Restoration

Cited by 18 publications

References 57 publications

Generalizing Ecological Effects of Shoreline Armoring Across Soft Sediment Environments

Generalizing Ecological Effects of Shoreline Armoring Across Soft Sediment Environments

Differential responses of ammonia-oxidizing archaea and bacteria to long-term fertilization in a New England salt marsh

Impacts of Mariculture on the Diversity of Bacterial Communities within Intertidal Sediments in the Northeast of China

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