Life history and secondary production of the amphipod Haploops nirae (Kaim-Malka, 1976) in the Bay of Concarneau (South Brittany)

Rigolet, Carinne; Dubois, Stanislas F.; Droual, Gabin; Caisey, Xavier; Thiébaut, Éric

doi:10.1016/j.ecss.2012.08.014

Cited by 13 publications

(11 citation statements)

References 39 publications

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“…Estimates of secondary production in Haploops and Amphiura communities (Rigolet et al . and S.F. Dubois, C. Rigolet and E. Thiébaut, unpublished data) agree with this conclusion: while the benthic stock biomass is halved in the Haploops community, the two communities show the same values of secondary production.…”

Section: Discussionsupporting

confidence: 61%

“…We tested isotopic FD indices on marine benthic ecosystems, using the Amphiura filiformis (M€ uller 1776) benthic community commonly occurring on the NW European continental shelf. In coastal bays of South Brittany, this community is partly colonized by the gregarious tubiculous amphipod engineer species Haploops nirae (Kaim-Malka 1976), which has been spreading over muddy benthic habitats in recent decades (Rigolet et al 2012). Ecosystem engineers can substantially change environmental conditions and resource availability via non-trophic interactions, thus affecting other species and altering community attributes of natural species assemblages (Jones, Lawton & Shachak 1997;Badano & Cavieres 2006).…”

Section: Introductionmentioning

confidence: 99%

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Investigating isotopic functional indices to reveal changes in the structure and functioning of benthic communities

et al. 2015

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Summary 1.With the use of stable isotopes, new concepts have emerged based on the idea that the ecological niche can be approximated by the isotopic niche defined as a δ-space area with isotopic δ values as coordinates. This study aims to (1) redefine functional indices originally based on quantitative biological traits of species and demonstrate the ecological significance of newly defined isotopic functional indices (IFI) in a δ-isotopic space, (2) compare IFI using biomass data with existing unweighted isotopic indices using only isotopic compositions. 2. Using a community-wide approach, we tested IFI using isotopic compositions of a large set of associated species from two marine benthic communities widely reported in coastal shallow waters: the common Amphiura filiformis muddy-sand community and the engineered Haploops nirae sandy-mud community. Biomass and isotopic composition ( 13 C and 15 N) of all species were measured during four seasons. 3. IFI were calculated in the isotopic space defined by the two communities and variations were analysed: (1) Isotopic Functional Richness indices measure the overall extent of the community trophic niche. They are higher in the Haploops community due to a higher diversity in food sources but also to longer food chains. (2) Isotopic Functional Evenness indices quantify the regularity in species distribution and the density in species packing. They showed that the biomass is concentrated at the edges of the food web in the Haploops community, outside the isotopic range of the main food source. (3) Isotopic Functional Divergence indices quantify the degree to which species distribution maximizes the divergence. They showed a larger utilisation of secondary food sources in the Haploops community. 4. The IFI variations responded according to expectations overall, based on the extensive knowledge of those communities. Results highlighted that IFI weighted with species biomass provide new insights into how the structure of energy accumulation as biomass between species is likely to underpin community structure and the interplay between structural components of richness, diversity and evenness of biomass distribution.

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Section: Discussionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Investigating isotopic functional indices to reveal changes in the structure and functioning of benthic communities

et al. 2015

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“…Unlike Webb et al (2009b), we showed that macrofauna assemblages are very different inside and outside pockmarks. Rigolet et al (2012Rigolet et al ( , 2014a showed that H. nirae is an engineer species that affects and controls associated species by strongly modifying hydrosedimentary features at the water-sediment interface. The infauna found outside pockmarks is typical of the Haploops community and was dominated by the deposit-feeding polychaetes Terebellides stroemii, Mediomastus fragilis and Paradoneis lyra, along with the predatory polychaete Shistomeringos rudolphi.…”

Section: Discussionmentioning

confidence: 99%

“…Haploops are active tube builders, but they only rework the first few centimeters of the sediment. Individuals leave tubes every year (for example after completion of their life cycle, Rigolet et al 2012). Because tubes are made with a mixture of solidified mucus and fine particles (Rigolet et al 2011), tubes and tube fragments resist mechanical and microbial fragmentation.…”

Section: Discussionmentioning

confidence: 99%

Role of pockmarks in diversity and species assemblages of coastal macrobenthic communities

Dubois¹,

Dérian²,

Caisey³

et al. 2015

Mar. Ecol. Prog. Ser.

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We used existing bathymetric data to study the macrofauna of a geophysical pockmark field restricted to a benthic habitat engineered by the tubiculous amphipod Haploops nirae in South Brittany (France). Stations inside and outside pockmarks of different morphometric characteristics (location, size, depression depth) were sampled for macrofauna and environmental parameters (sediment characteristics, organic matter, chl a, hydrogen sulfide and methane concentrations). Diversity indices showed higher species richness inside pockmarks, especially for species with medium to high abundances. Most sediment cores showed low methane but high hydrogen sulfide concentrations. We hypothesised that after eruption, the remaining residual methane from pockmark sediments is oxidised by seawater sulfate and accounts for the high sulfide concentrations found at increasing depth in our samples and the low methane concentrations. We found no relationship between sediment profiles and morphometric features of the pockmarks. Macrofauna assemblages inside vs. outside pockmarks appeared to be different. Pockmarks appear to increase connectivity among habitats and heterogeneity within habitats, thereby creating local hotspots that allow the settlement of species that cannot otherwise develop in Haploops tube mats. Multivariate analyses distinguished 4 groups of pockmarks and control stations. We assumed that deeper pockmarks were created more recently than shallow pockmarks and that each pockmark is at a different stage of evolution, hence explaining the large variability in the characteristics of pockmark groups. This explains why previous investigations have found contradictory results when comparing macrofauna species diversity and composition between areas inside and outside pockmarks. Finally, we propose and discuss a successional stage model for pockmarks.

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“…Shallow marine waters surrounding Brittany (West coast of France) are largely dominated by sandy and muddy soft‐bottom habitats. In several bays and archipelagos, muddy sediments are extensively colonized by a gregarious tubiculous amphipod, Haploops nirae (Amphipoda)—often confused with H. tubicola (Rigolet, Dubois, Droual, Caisey, & Thiébaut, ). This engineer species occurs in high densities and actively modifies the sediment‐water interface through tube‐building and filtering activities (Rigolet, Le Souchu, Caisey, & Dubois, ).…”

Section: Introductionmentioning

confidence: 99%

Functional roles of an engineer species for coastal benthic invertebrates and demersal fish

Chaalali

Brind’Amour

Dubois

et al. 2017

Ecology and Evolution

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Through their tissues or activities, engineer species create, modify, or maintain habitats and alter the distribution and abundance of many plants and animals. This study investigates key ecological functions performed by an engineer species that colonizes coastal ecosystems. The gregarious tubiculous amphipod Haploops nirae is used as a biological model. According to previous studies, the habitat engineered by H. nirae (i.e., Haploops habitat) could provide food and natural shelter for several benthic species such as benthic diatoms belonging to the gender Navicula, the micrograzer Geitodoris planata, or the bivalve Polititapes virgineus. Using data from scientific surveys conducted in two bays, this study explored whether (1) the Haploops sandy‐mud community modifies invertebrate and ichthyologic community structure (diversity and biomass); (2) H. nirae creates a preferential feeding ground; and (3) this habitat serves as a refuge for juvenile fish. Available Benthic Energy Coefficients, coupled with more traditional diversity indices, indicated higher energy available in Haploops habitat than in two nearby habitats (i.e., Sternaspis scutata and Amphiura filiformis/Owenia fusiformis habitats). The use of isotopic functional indices (IFIs) indicated (1) a higher functional richness in the Haploops habitat, related to greater diversity in food sources and longer food chains; and (2) a higher functional divergence, associated with greater consumption of a secondary food source. At the invertebrate‐prey level, IFIs indicated little specialization and little trophic redundancy in the engineered habitat, as expected for homogenous habitats. Our results partly support empirical knowledge about engineered versus nonengineered habitats and also add new perspectives on habitat use by fish and invertebrate species. Our analyses validated the refuge‐area hypothesis for a few fish species. Although unique benthic prey assemblages are associated with Haploops habitat, the hypothesis that it is a preferential feeding area was not verified. However, specialist feeding behavior was observed for predators, which calls for further investigation.

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Life history and secondary production of the amphipod Haploops nirae (Kaim-Malka, 1976) in the Bay of Concarneau (South Brittany)

Cited by 13 publications

References 39 publications

Investigating isotopic functional indices to reveal changes in the structure and functioning of benthic communities

Investigating isotopic functional indices to reveal changes in the structure and functioning of benthic communities

Role of pockmarks in diversity and species assemblages of coastal macrobenthic communities

Functional roles of an engineer species for coastal benthic invertebrates and demersal fish

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