Ecological and functional changes associated with long-term recovery from organic enrichment

MacLeod, C; Moltschaniwskyj, Natalie A.; Crawford, Christine

doi:10.3354/meps07534

Cited by 25 publications

(13 citation statements)

References 27 publications

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“…Additionally, biological indicators have been proposed for monitoring the environmental changes resulting from aquaculture. For example, changes of benthic macrofauna assemblages are generally recommended as a proxy for monitoring the impacts of cage farming (Macleod et al 2008, Yoon et al 2009, Jung et al 2016. However, investigation of the benthic community using video surveillance and the identification of macrofauna and meiofauna to the level of individual species is expensive and requires professional skill to make an accurate assessment of the impact (Castine et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of finfish aquaculture on biogeochemistry and bacterial communities associated with sulfur cycles in highly sulfidic sediments

Choi¹,

Cho²,

Kim³

et al. 2018

Aquacult. Environ. Interact.

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A combination of biogeochemical analyses and molecular microbiological analyses were conducted to assess the environmental impact of finfish aquaculture and to elucidate the major microbial assemblages responsible for the production and removal of reduced sulfur compounds in fish-farm sediments. The average concentrations of H 2 S (123 µM) and NH 4 + (1310 µM) and the dissimilatory sulfite reductase (dsr) gene copy number (1.9 × 10 9 copies cm −3) in the sediments at the farm site were 15-, 1.5-and 2-fold higher, respectively, than those measured at the less-impacted reference site. Accordingly, the sulfate reduction rate (SRR) at the farm site (118 mmol m −2 d −1) was 19-fold higher than that measured at the reference site (6.2 mmol m −2 d −1). Analyses of dsrA and 16S rRNA gene sequences revealed that the Syntrophobacteraceae and Desulfobulbaceae groups are the major sulfate-reducing bacteria around the fish-farm sediment. Interestingly, despite the high SRR (12.2−19.6 mmol m −2 d −1), the H 2 S concentration was low (< 8 µM) in the top 0−2 cm of the fish-farm sediments. In this sulfide-mismatched zone, sulfur-oxidizing bacteria associated with Gamma-and Epsilonproteobacteria were abundant. Especially at the 1−2 cm depth, bacteria related to Sulfurovum in the Epsilonproteobacteria showed the highest relative abundance, comprising 62% of the 16S rDNA sequences. The results strongly suggest that Sulfurovum-like bacteria play a significant ecological and biogeochemical role in oxidation and reduction of reduced sulfur compounds from the organic-rich, highly sulfidic fish-farm sediments.

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Section: Introductionmentioning

confidence: 99%

Effects of finfish aquaculture on biogeochemistry and bacterial communities associated with sulfur cycles in highly sulfidic sediments

Choi¹,

Cho²,

Kim³

et al. 2018

Aquacult. Environ. Interact.

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“…Macrofauna communities that exhibit a natural diversity, have a range of species with different biology, and so with different active biological transport traits [119,120]. Conversely, sediments affected by organic enrichment sources, such as fish farming, show less diverse macrofauna communities mainly composed by small opportunistic species with lower active biological transport activity [44,96,121]. This results in decreased metabolic capacity of the sediment, which may not be able to put up with the high OM loads derived from the fish farming activity, and may result in increased accumulation of organic waste products [122].…”

Section: Assessing Loss On Ecosystem Functioning Due To the Alteratiomentioning

confidence: 99%

“…However, if the species lost is a keystone species, its removal can have a notable decrease in the performance of the process [132] (Figure 4). Similarly, as regards benthic recovery after the cessation of the fish farming, the restoration of ecosystem functions may be a more useful indicator of recovery than the community equivalence with unpolluted areas [121].…”

Section: Assessing Loss On Ecosystem Functioning Due To the Alteratiomentioning

confidence: 99%

“…Few studies have dealt with the effects of fish farming on the ecosystem functioning [11,51,96,121,133]. In these studies, one or more functional traits have been assigned to each species and then the changes on functional diversity have been compared according to the level of fish farm impact.…”

Section: Assessing Loss On Ecosystem Functioning Due To the Alteratiomentioning

confidence: 99%

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Diversity Patterns of Benthic Macrofauna Caused by Marine Fish Farming

Sanz‐Lázaro

Marín

2011

Diversity

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This paper reviews the patterns observed in the diversity and structure of the macrofauna benthic community under the influence of fish farming. First, we explain the effects of organic enrichment on the sediment and the consequences for the inhabiting communities. We describe the diversity trends in spatial and temporal gradients affected by fish farming and compare them with those described by the Pearson and Rosenberg model. We found that in general terms, the trends of diversity and other community parameters followed the Pearson and Rosenberg model but they can vary to some extent due to sediment local characteristics or to secondary disturbances. We also show the different mechanisms by which wild fish can affect macrofauna diversity patterns under fish farming influence. In addition, we comment the importance of the macrofauna diversity in the ecosystem functions and propose some guidelines to measure functional diversity related to relevant processes at ecosystem level. We propose more research efforts in the main topics commented in this review to improve management strategies to guarantee a good status of the diversity and ecosystem functioning of sediments influenced by fish farming

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“…Trait-based approaches have been used to assess various anthropogenic pressures on streams and rivers, including WWTP effluents (Charvet et al 1998, Lecerf et al 2006, sediment toxicity (Archaimbault et al 2010), and multiple stressor gradients (Dolédec et al 1999, Usseglio-Polatera and Beisel 2002, Gayraud et al 2003, Mondy and Usseglio-Polatera 2013; see also the review by Menezes et al 2010). In a recent comparative study, Marzin et al (2012) suggested that functional trait-based metrics might discriminate anthropogenic disturbances better than taxonomy-based metrics, but very few investigators have used a functional trait-based approach to examine invertebrate community recovery after disturbance cessation (Rabeni et al 1985, MacLeod et al 2008.…”

mentioning

confidence: 99%

Recovery dynamics in invertebrate communities following water-quality improvement: taxonomy- vs trait-based assessment

Arce

Archaimbault²,

Mondy

et al. 2014

Freshwater Science

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Sewage effluents are recognized as one of the most common sources of river degradation. However, very few investigators have tried to evaluate ecosystem recovery after cessation of wastewater treatment plant (WWTP) discharge. Our goals were to: 1) analyze invertebrate community responses to chemical water quality and habitat changes after wastewater treatment improvement, and 2) evaluate the abilities of taxonomy-based and trait-based approaches to detect and explain community recovery processes in a multistressor context. We studied the benthic macroinvertebrate community of 3 sites of a heavily impaired stream (the Vistre River, France) during a 4-y period that included the decommissioning of a deficient WWTP (WWTP-A) and the commissioning of a new one (WWTP-B). We assessed the recovery of the benthic community by comparing observed taxonomic and trait-based (i.e., functional) metrics at the study site to values estimated with information from least-impaired reaches of the same river type. Most taxonomy-based characteristics of benthic communities subjected to WWTP-A recovered in 3 mo, but the recovery time of several trait-based characteristics was ∼2 y. No change was observed in taxonomic and trait-based diversity during the 4-y study. Taxonomy-based metrics detected the first signs of river reach recovery rapidly, but combinations of trait-based metrics and taxonomic abundance-based metrics are more likely to identify functional recovery of invertebrate assemblages faced with water-quality improvement, even when multiple stressors impaired upstream reaches.

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Ecological and functional changes associated with long-term recovery from organic enrichment

Cited by 25 publications

References 27 publications

Effects of finfish aquaculture on biogeochemistry and bacterial communities associated with sulfur cycles in highly sulfidic sediments

Effects of finfish aquaculture on biogeochemistry and bacterial communities associated with sulfur cycles in highly sulfidic sediments

Diversity Patterns of Benthic Macrofauna Caused by Marine Fish Farming

Recovery dynamics in invertebrate communities following water-quality improvement: taxonomy- vs trait-based assessment

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