The response of nematodes to deep-sea CO2 sequestration: A quantile regression approach

Fleeger, John W.; Johnson, David Samuel; Carman, Kevin R.; Weisenhorn, Pamela; Gabriele, A. L.; Thistle, David; Barry, James

doi:10.1016/j.dsr.2010.03.003

Cited by 23 publications

(15 citation statements)

References 45 publications

(63 reference statements)

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“…Opportunistic species generally occur under extreme, variable conditions and get outcompeted by less opportunistic species when disturbance is low (Grassle and Sanders, 1973). However, small-scale disturbances and habitat heterogeneity in the deep sea may induce a more dynamic environment to allow the persistence of colonizing species (Gallucci et al, 2005). This seems to be supported by the large number of Monhysteridae in our study, which are generally classified as good colonizers, at least in shallow water environments (Bongers et al, 1991).…”

Section: Nematode Community May Face Alterations In Response To Buriasupporting

confidence: 64%

Responses of an abyssal meiobenthic community to short-term burial with crushed nodule particles in the south-east Pacific

et al. 2019

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Abstract. Increasing industrial metal demands due to rapid technological developments may drive the prospection and exploitation of deep-sea mineral resources such as polymetallic nodules. To date, the potential environmental consequences of mining operations in the remote deep sea are poorly known. Experimental studies are scarce, especially with regard to the effect of sediment and nodule debris depositions as a consequence of seabed mining. To elucidate the potential effects of the deposition of crushed polymetallic nodule particles on abyssal meiobenthos communities, a short (11 d) in situ experiment at the seafloor of the Peru Basin in the south-east Pacific Ocean was conducted in 2015. We covered abyssal, soft sediment with approx. 2 cm of crushed nodule particles and sampled the sediment after 11 d of incubation at 4200 m water depth. Short-term ecological effects on the meiobenthos community were studied including changes in their composition and vertical distribution in the sediment as well as nematode genus composition. Additionally, copper burden in a few similar-sized but randomly selected nematodes was measured by means of micro X-ray fluorescence (µXRF). At the end of the experiment, 46±1 % of the total meiobenthos occurred in the added crushed nodule layer, while abundances decreased in the underlying 2 cm compared to the same depth interval in undisturbed sediments. Densities and community composition in the deeper 2–5 cm layers remained similar in covered and uncovered sediments. The migratory response into the added nodule material was particularly seen in polychaetes (73±14 %, relative abundance across all depth layers) copepods (71±6 %), nauplii (61±9 %) and nematodes (43±1 %). While the dominant nematode genera in the added nodule material did not differ from those in underlying layers or the undisturbed sediments, feeding type proportions in this layer were altered, with a 9 % decrease of non-selective deposit feeders and an 8 % increase in epistrate feeders. Nematode tissue copper burden did not show elevated copper toxicity resulting from burial with crushed nodule particles. Our results indicate that burial with a 2 cm layer of crushed nodule particles induces changes in the vertical structure of meiobenthos inside the sediment and an alteration of nematode feeding type proportions within a short time frame of 11 d, while nematode tissue copper burden remains unchanged. These findings considerably contribute to the understanding of the short-term responses of meiobenthos to physical disturbances in the deep sea.

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Section: Nematode Community May Face Alterations In Response To Buriasupporting

confidence: 64%

Responses of an abyssal meiobenthic community to short-term burial with crushed nodule particles in the south-east Pacific

et al. 2019

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“…In a mesocosm experiment, which combined acidification and warming of the water, the abundance and diversity of macrofauna were negatively affected, while the abundance of nematodes increased due to the reduction in predation and competition (Hale et al 2011). Deep-sea sedimentary organisms are expected to be more sensitive to perturbations than are shallow-water ones, because natural deep-sea CO 2 concentrations and pH are less variable than in shallow water (Fleeger et al 2010). Changes in foraminiferal assemblages due to acifidification may have consequences for specialist predators, such as certain isopods and many scaphopods (Ingels et al 2012).…”

Section: Response To Ocean Acidificationmentioning

confidence: 99%

“…A number of acidification experiments (ex situ and in situ) focusing on meiofauna compartment have been conducted on shallow-water and deep-sea benthic ecosystems (e.g., Thistle et al 2006;Ricketts et al 2009;Fleeger et al 2010;McIntyre-Wressnig et al 2013). The intensity of response varies with the distance and intensity of the acidification source (Ricketts et al 2009).…”

Section: Response To Ocean Acidificationmentioning

confidence: 99%

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

et al. 2015

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Our planet is changing, and one of the most pressing challenges facing the scientific community revolves around understanding how ecological communities respond to global changes. From coastal to deep-sea ecosystems, ecologists are exploring new areas of research to find model organisms that help predict the future of life on our planet. Among the different categories of organisms, meiofauna offer several advantages for the study of marine benthic ecosystems. This paper reviews the advances in the study of meiofauna with regard to climate change and anthropogenic impacts. Four taxonomic groups are valuable for predicting global changes: foraminifers (especially calcareous forms), nematodes, copepods and ostracods. Environmental variables are fundamental in the interpretation of meiofaunal patterns and multistressor experiments are more informative than single stressor ones, revealing complex ecological and biological interactions. Global change has a general negative effect on meiofauna, with important consequences on benthic food webs. However, some meiofaunal species can be favoured by the extreme conditions induced by global change, as they can exhibit remarkable physiological adaptations. This review highlights the need to incorporate studies on taxonomy,

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“…; and oxygen distribution, Fleeger et al . , ) are known to cause changes in nematode body size and shape. Food availability (Soltwedel et al .…”

Section: Discussionmentioning

confidence: 99%

Long‐term nutrient enrichment alters nematode trophic structure and body size in a Spartina alterniflora salt marsh

Mitwally

Fleeger

2014

Marine Ecology

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The effects of long‐term experimental nutrient enrichment on nematode trophic guilds and morphometrics were examined in intertidal saltmarsh creeks of Plum Island Estuary, Massachusetts, USA. Nematodes from the marsh‐edge Spartina alterniflora habitat in a reference creek (n = 3300) were sampled annually and compared with nematodes (n = 3100) from a creek in which nitrate and phosphate loading rates were increased approximately 10–15× for 6 years. Trophic guilds in both creeks were dominated by epistrate (diatom) feeders and predators, and natural temporal variability across years was high. However, after 4 years of nutrient enrichment, a shift in the nutrient‐enriched creek was detected from a dominance of epistrate feeders to an increased proportion of predators, even though neither the benthic microalgae biomass nor the total density of nematodes was affected by fertilization. Nematodes also became longer, and longer relative to their diameter over time with nutrient enrichment because of the shift in trophic structure as short‐stout epistrate feeders were replaced with longer, more slender predators. These changes may have been directly related to nutrient enrichment effects on benthic algae or indirectly to the many other effects of enrichments on ecosystem structure or function. Our research indicates that nutrient enrichment alters the nematode community and this alternation may directly or indirectly affect the response of benthic algae to nutrient enrichment and as well as other ecosystem services.

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The response of nematodes to deep-sea CO2 sequestration: A quantile regression approach

Cited by 23 publications

References 45 publications

Responses of an abyssal meiobenthic community to short-term burial with crushed nodule particles in the south-east Pacific

Responses of an abyssal meiobenthic community to short-term burial with crushed nodule particles in the south-east Pacific

Is the meiofauna a good indicator for climate change and anthropogenic impacts?

Long‐term nutrient enrichment alters nematode trophic structure and body size in a Spartina alterniflora salt marsh

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