Links between deep‐sea respiration and community dynamics

Ruhl, Henry A.; Bett, Brian J.; Hughes, Sarah Jane; Alt, Claudia H. S.; Ross, Elizabeth; Lampitt, Richard S.; Pebody, Corinne; Smith, Kenneth L.; Billett, David

doi:10.1890/13-0675.1

Cited by 26 publications

(23 citation statements)

References 52 publications

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“…Overall, a similar lack of compensatory dynamics was also reported for Sta. M megafauna by Ruhl et al (2014), as has been noted in other ecosystems (Houlahan et al, 2007). Hubbell (2001) suggested that compensatory mechanisms could be hidden when studying species that are not at the same trophic level.…”

Section: Mechanisms Of Polychaete Assemblage Structure Dynamicsmentioning

confidence: 76%

“…These variations were of similar magnitude to that recorded for the Sta. M megafauna (factor of 4, Ruhl et al, 2014). In addition to respiration, polychaetes perform other important carbon cycle functions such as bioturbation and sediment reworking (Olsgaard et al, 2003;Rouse and Pleijel, 2001), that may all vary with a similar magnitude.…”

Section: Inter-annual Variation In the Polychaete Assemblage And Its mentioning

confidence: 99%

“…M megafauna during both periods, (i.e. at both locations, 1991-2005[1989-2004Ruhl et al, 2014Ruhl et al, ] and 2009Ruhl et al, -2011Ruhl et al, [2006Ruhl et al, -2012Kuhnz et al, 2014]). It is conceivable that small active surface deposit feeding megafauna may have intercepted much of the incoming organic matter flux, reducing the magnitude of temporal variation experienced by the infaunal benthos .…”

Section: Assemblage Variation Links To Environmental Variablesmentioning

confidence: 99%

“…Over 25 years of study, the POC flux reaching the benthos underwent significant variations both in quantity and quality (Smith et al, 2006;Smith et al, 2013). In turn, POC flux variations have driven changes in the structure and function of the benthic community, in particular the mobile epibenthic megafauna (Kuhnz et al, 2014;Ruhl and Smith, 2004;Ruhl et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Inter-annual species-level variations in an abyssal polychaete assemblage (Sta. M, NE Pacific, 4000 m)

Laguionie‐Marchais

Paterson

Bett

et al. 2016

Progress in Oceanography

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Please cite this article as: Laguionie-Marchais, C., Paterson, G.L.J., Bett, B.J., Smith, K.L. Jr., Ruhl, H.A., Interannual species-level variations in an abyssal polychaete assemblage (Sta. M, NE Pacific, 4000 m), Progress in Oceanography (2015), doi: http://dx.doi.org/10.1016/j.pocean. 2015.10.006 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Changes in several species were also lagged to changes in POC flux by 4 to 10 months. The polychaete fauna exhibited a significant positive relationship between total density and total energy use rate, suggesting population-level tracking of a common resource (e.g. POC flux food supply). Neither compensatory nor energetic zero-sum dynamics were detected among the polychaete assemblage, but the results suggest that the latter occur in the macrofaunal community as a whole. The results do indicate (a) potential control of species composition, and the density of individual key species, by food supply, when the time-series prior to the sampling location was analysed separately, and (b) generally sensitive detection of environmental change by species-level analysis of the abyssal polychaete assemblage.

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Section: Mechanisms Of Polychaete Assemblage Structure Dynamicsmentioning

confidence: 76%

Section: Inter-annual Variation In the Polychaete Assemblage And Its mentioning

confidence: 99%

Section: Assemblage Variation Links To Environmental Variablesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Inter-annual species-level variations in an abyssal polychaete assemblage (Sta. M, NE Pacific, 4000 m)

Laguionie‐Marchais

Paterson

Bett

et al. 2016

Progress in Oceanography

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“…Holothurian population dynamics have been linked to POC flux and are considered indicators of climate change impacts on abyssal ecosystems (Glover et al, 2010). Holothurian community dynamics have been examined in detail at long-term time-series sites in relation to shifts in surface phytodetritus input linked to the North Atlantic Oscillation (Porcupine Abyssal Plain, NE Atlantic; Billett et al, 2001) and to the Northern Oscillation Index and Bakun Upwelling Index (Station M, NE Pacific; Ruhl et al, 2014). At both sites, variation in these climate indices were correlated with increased pulses of POC, which resulted in significant increases in abundance of holothurian species, particularly those species able to rapidly use phytodetrital material and successfully reproduce and recruit (Billett et al, 2001;Smith et al, 2006Smith et al, , 2009Huffard et al, 2016).…”

Section: The Abyssal Zonementioning

confidence: 99%

Major impacts of climate change on deep-sea benthic ecosystems

Sweetman

Thurber

Smith

et al. 2017

Elementa: Science of the Anthropocene

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297

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The deep sea encompasses the largest ecosystems on Earth. Although poorly known, deep seafloor ecosystems provide services that are vitally important to the entire ocean and biosphere. Rising atmospheric greenhouse gases are bringing about significant changes in the environmental properties of the ocean realm in terms of water column oxygenation, temperature, pH and food supply, with concomitant impacts on deep-sea ecosystems. Projections suggest that abyssal (3000-6000 m) ocean temperatures could increase by 1°C over the next 84 years, while abyssal seafloor habitats under areas of deep-water formation may experience reductions in water column oxygen concentrations by as much as 0.03 mL L -1 by 2100. Bathyal depths (200-3000 m) worldwide will undergo the most significant reductions in pH in all oceans by the year 2100 (0.29 to 0.37 pH units). O 2 concentrations will also decline in the bathyal NE Pacific and Southern Oceans, with losses up to 3.7% or more, especially at intermediate depths. Another important environmental parameter, the flux of particulate organic matter to the seafloor, is likely to decline significantly in most oceans, most notably in the abyssal and bathyal Indian Ocean where it is predicted to decrease by 40-55% by the end of the century. Unfortunately, how these major changes will affect deep-seafloor ecosystems is, in some cases, very poorly understood. In this paper, we provide a detailed overview of the impacts of these changing environmental parameters on deep-seafloor ecosystems that will most likely be seen by 2100 in continental margin, abyssal and polar settings. We also consider how these changes may combine with other anthropogenic stressors (e.g., fishing, mineral mining, oil and gas extraction) to further impact deep-seafloor ecosystems and discuss the possible societal implications.

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Carbon cycling in the deep eastern North Pacific benthic food web: Investigating the effect of organic carbon input

et al. 2016

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The deep ocean benthic environment plays a role in long-term carbon sequestration. Understanding carbon cycling in the deep ocean floor is critical to evaluate the impact of changing climate on the oceanic systems. Linear inverse modeling was used to quantify carbon transfer between compartments in the benthic food web at a long time-series study site in the abyssal northeastern Pacific (Station M). Linear inverse food web models were constructed for three separate years in the time-series when particulate organic carbon Results indicate that during high POC episodic pulses the role of faunal mediated carbon cycling would increase. Semi-labile detritus dominates benthic faunal diets and the role of labile detritus declined with increased total POC input. Linear inverse modeling represents an effective framework to analyze highresolution time-series data and demonstrate the impact of climate change on the deep ocean carbon cycle in a coastal upwelling system.

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Links between deep‐sea respiration and community dynamics

Abstract: 18It has been challenging to establish the mechanisms that link ecosystem functioning to

Cited by 26 publications

References 52 publications

Inter-annual species-level variations in an abyssal polychaete assemblage (Sta. M, NE Pacific, 4000 m)

Inter-annual species-level variations in an abyssal polychaete assemblage (Sta. M, NE Pacific, 4000 m)

Major impacts of climate change on deep-sea benthic ecosystems

Carbon cycling in the deep eastern North Pacific benthic food web: Investigating the effect of organic carbon input

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