Recruitment failure and shifts in community structure following mass mortality limit recovery prospects of black abalone

Miner, C. Melissa; Altstatt, Jessica; Raimondi, Peter T.; Minchinton, Todd E.

doi:10.3354/meps327107

Cited by 66 publications

(59 citation statements)

References 26 publications

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“…Diseases of abalone have caused great problems in aquaculture industries around the world (for recent examples, see Miner et al 2006;Hooper et al 2007;Sawabe et al 2007). The main disease problem in South Africa is the sabellid worm Terebrasabella heterouncinata (Ruck and Cook 1998).…”

Section: Threatsmentioning

confidence: 99%

Growing Ulva (Chlorophyta) in integrated systems as a commercial crop for abalone feed in South Africa: a SWOT analysis

et al. 2008

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Over 1,000t fresh weight of Ulva was cultivated on South African abalone farms in 2007, primarily for feed, but in one case to allow partial re-circulation by nutrient removal. The potential of this new commercial crop is analysed. Material is collected from natural free-floating populations and at least four species are commonly grown, with different ecophysiological characteristics. A brown epiphyte, Myrionema strangulans, causes a disease of the Ulva, which is currently managed by farmers by restocking. The main potential threat is that some farmers are wary of integrated systems, fearing they may promote disease in abalone, although Ulva has been grown in abalone effluent and fed back to the abalone on one farm for 6 years without adverse effects. Opportunities exist for the expansion of Ulva cultivation via further spread of the abalone industry, the inclusion of seaweed raceways in proposed fish-farming activities, or the potential for the inclusion of high quality cultivated Ulva as a constituent in aquafeed. A conservative estimate of production over a full year from these raceway systems was 26.1 g dw m −2 day −1 (2006) and 19.7 g dw m −2 day −1 (2007), similar to maximum figures for total annual microalgal biomass production in outdoor systems.

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Section: Threatsmentioning

confidence: 99%

Growing Ulva (Chlorophyta) in integrated systems as a commercial crop for abalone feed in South Africa: a SWOT analysis

et al. 2008

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“…These potential negative effects of kelp on grazer recruits could explain grazer-CCA recruitment facilitation despite the potential for settlement in locations with lower food (i.e., macroalgae) availability at later life history stages (many grazers feed primarily on epiphytic diatoms during early life history stages). Furthermore, by grazing macroalgae, adult grazers maintain suitable habitat for larval settlement and juvenile survival (Miner et al 2006). Ultimately, CCA facilitation of grazer recruitment enhances future grazing and subsequently CCA survival (see Plate 1), while kelp inhibition of grazer recruitment and survivorship reduces future grazing and subsequently enhances kelp survival.…”

Section: Introductionmentioning

confidence: 99%

Recruitment facilitation can drive alternative states on temperate reefs

Baskett

Salomon

2010

Ecology

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Abstract. How the combination of positive and negative species interactions acts to drive community dynamics is a fundamental question in ecology. Here we explore one aspect of this question by expanding the theory of predator-mediated coexistence to include the potential role of facilitation between the predator and inferior competitor. To motivate and illustrate our simple model, we focus on sea-urchin-algae interactions in temperate rocky reef systems and incorporate recruitment facilitation, a common characteristic of marine systems. Specifically, the model represents sea urchin grazing on macroalgae, macroalgal competition with crustose coralline algae (CCA), and facilitation of sea urchin recruitment to CCA. These interactions generate alternative stable states, one dominated by macroalgae and the other by urchins, which do not occur when recruitment facilitation of urchins to CCA is ignored. Therefore, recruitment facilitation provides a possible mechanism for alternative kelp forest and urchin barren states in temperate marine systems, where storm events or harvesting of urchins or their predators can drive switches between states that are difficult to reverse. In systems with such dynamics, spatial management such as no-take marine reserves may play a crucial role in protecting community structure by increasing the resilience to shifts between states.

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“…The disease withering syndrome (WS) results from a complex relationship among its abalone hosts, the bacterial pathogen (a rickettsia-like organism 'Candidatus Xenohaliotis californiensis' (WS-RLO, [38]), and the environment (temperature anomalies) [39][40][41][42][43]. A recently discovered bacteriophage hyperparasite further complicates the disease dynamics in this system [44].…”

Section: (D) Tissues and Cellsmentioning

confidence: 99%

“…Populations may vary in susceptibility to a pathogen or disease due to local adaptation and or environmental conditions; genetic and population connectivity data for a given species are often lacking or limited (e.g. [39,[70][71][72]). Populationlevel data are also essential for proper management of disease-affected individuals or when restoring depleted species within and outside disease zones [73].…”

Section: (B) Community and Populationmentioning

confidence: 99%

Complementary approaches to diagnosing marine diseases: a union of the modern and the classic

Burge

Friedman

Getchell

et al. 2016

Phil. Trans. R. Soc. B

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Linking marine epizootics to a specific aetiology is notoriously difficult. Recent diagnostic successes show that marine disease diagnosis requires both modern, cutting-edge technology (e.g. metagenomics, quantitative real-time PCR) and more classic methods (e.g. transect surveys, histopathology and cell culture). Here, we discuss how this combination of traditional and modern approaches is necessary for rapid and accurate identification of marine diseases, and emphasize how sole reliance on any one technology or technique may lead disease investigations astray. We present diagnostic approaches at different scales, from the macro (environment, community, population and organismal scales) to the micro (tissue, organ, cell and genomic scales). We use disease case studies from a broad range of taxa to illustrate diagnostic successes from combining traditional and modern diagnostic methods. Finally, we recognize the need for increased capacity of centralized databases, networks, data repositories and contingency plans for diagnosis and management of marine disease.

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Recruitment failure and shifts in community structure following mass mortality limit recovery prospects of black abalone

Cited by 66 publications

References 26 publications

Growing Ulva (Chlorophyta) in integrated systems as a commercial crop for abalone feed in South Africa: a SWOT analysis

Growing Ulva (Chlorophyta) in integrated systems as a commercial crop for abalone feed in South Africa: a SWOT analysis

Recruitment facilitation can drive alternative states on temperate reefs

Complementary approaches to diagnosing marine diseases: a union of the modern and the classic

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