Trophodynamics of estuarine intertidal harpacticoid copepods based on stable isotope composition and fatty acid profiles

Cnudde, Clio; Moens, Tom; Werbrouck, Eva; Lepoint, Gilles; Gansbeke, D. Van; Troch, Marleen De

doi:10.3354/meps11161

Cited by 32 publications

(25 citation statements)

References 79 publications

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“…However, recent data from a salt marsh gully in the Scheldt estuary, the Netherlands, confirm our results that sulfide-oxidizing bacteria are the major carbon resource for these copepods (Cnudde et al, 2014). Further, Grego et al (2014) found representatives of the family Cletodidae to be the most resistant copepods to longterm anoxia.…”

Section: -M Vafeiadou Et Al: Resource Utilization and Trophic Positsupporting

confidence: 86%

Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to <i>Zostera noltii</i> beds

et al. 2014

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Abstract. This study examines the resource use and trophic position of nematodes and harpacticoid copepods at the genus/species level in an estuarine food web in Zostera noltii beds and in adjacent bare sediments using the natural abundance of stable carbon and nitrogen isotopes. Microphytobenthos and/or epiphytes are among the main resources of most taxa, but seagrass detritus and sediment particulate organic matter contribute as well to meiobenthos nutrition, which are also available in deeper sediment layers and in unvegetated patches close to seagrass beds. A predominant dependence on chemoautotrophic bacteria was demonstrated for the nematode genus Terschellingia and the copepod family Cletodidae. A predatory feeding mode is illustrated for Paracomesoma and other Comesomatidae, which were previously considered first-level consumers (deposit feeders) according to their buccal morphology. The considerable variation found in both resource use and trophic level among nematode genera from the same feeding type, and even among congeneric nematode species, shows that the interpretation of nematode feeding ecology based purely on mouth morphology should be avoided.

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Section: -M Vafeiadou Et Al: Resource Utilization and Trophic Positsupporting

confidence: 86%

Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to <i>Zostera noltii</i> beds

et al. 2014

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“…Bacteria are a possible food source for harpacticoid copepods (Rieper, 1978). In our study, the presence of 14:0, 15:0 and 17:0, and 18:1ω7 could indicate a contribution of bacterial biomass to copepod diet (Cnudde et al, 2015;Jaschinski et al, 2008). Other heterotrophs (fungi, protists) are also potentially ingested by copepods, but our approach cannot determinate this potential contribution to the copepod diet.…”

Section: Discussionmentioning

confidence: 78%

“…Fatty acid (FA) profiling complements stable isotope analysis as a second biomarker, providing additional information on the feeding ecology of meiofauna (Cnudde et al, 2015;De Troch et al, 2012;Leduc et al, 2009), as several FAs can be used as markers for specific food sources (Dalsgaard et al, 2003;El-Sabaawi et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Seasonal dependence on seagrass detritus and trophic niche partitioning in four copepod eco-morphotypes

et al. 2018

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Benthic copepods dominate meiofaunal communities from marine phytodetritus, both in terms of numerical abundance and species diversity. Nevertheless, ecological factors driving copepod co-existence and population dynamics are still largely unknown. Here, we aimed to explore feeding habits of four copepod species commonly found in Mediterranean seagrass detritus accumulations, representing distinct eco-morphotypes (planktonic, phytal, epibenthic and mesopsammic). Joint use of fatty acid and stable isotope trophic markers showed that co-occurring harpacticoid copepods have diversified diets. Contrary to what was expected, microphytobenthos does not serve as their main food source. Instead, we found evidence from both techniques that major food items include heterotrophic biomass, macro-epiphytes and, depending on eco-morphology and season, of seagrass detritus-derived organic matter. Isotopic niches suggested that eco-morphotypes showed resource segregation. This segregation varies temporally, and partial overlap occurs between niches of phytal and epibenthic eco-morphotypes in some seasons. Our results highlight that, contrary to what is often assumed for meiofaunal consumers, considerable trophic diversity exists among copepod assemblages. They also indicate that, through multiple non-exclusive possible mechanisms, copepods could constitute a major link between seagrass detritus and associated biomass and higher trophic levels (namely macroinvertebrates and juvenile fish).

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“…Details on the Paulina tidal flat are given in Gallucci, Steyaert, and Moens (); the sampling station corresponded to station H4 in Cnudde et al. ().…”

Section: Methodsmentioning

confidence: 99%

“…longicaudata, we also sampled the Paulina inter-tidal mudflat in the polyhaline reach of the Scheldt Estuary, The Netherlands, in July 2014. Details on the Paulina tidal flat are given in Gallucci, Steyaert, and Moens (2005); the sampling station corresponded to station H4 in Cnudde et al (2015).…”

Section: Introductionmentioning

confidence: 99%

Lack of population genetic structure in the marine nematodes Ptycholaimellus pandispiculatus and Terschellingia longicaudata in beaches of the Persian Gulf, Iran

et al. 2017

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We investigated genetic diversity and population genetic structure of two common benthic nematode species, Ptycholaimellus pandispiculatus and Terschellingia longicaudata, from sandy beaches in the area of Bandar Abbas (Iran), Persian Gulf. Based upon partial mitochondrial cytochrome oxidase c subunit 1 (COI) gene data, 17 and two haplotypes were found for P. pandispiculatus and Te. longicaudata, respectively. Analysis of molecular variance did not reveal a significant population genetic structure for either species. The absence of genetic structuring indicates substantial dispersal and gene flow in our study area. To assess the species structure of Te. longicaudata at a larger geographic scale, we compared 18S rDNA and COI sequences from Iran and the Scheldt Estuary in The Netherlands to ascertain whether they truly belong to the same species. Our data confirmed previous studies that Te. longicaudata likely constitutes a complex of multiple cryptic species, with one of these species having a (near) cosmopolitan distribution.

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Trophodynamics of estuarine intertidal harpacticoid copepods based on stable isotope composition and fatty acid profiles

Abstract: 13C of Cletodidae were highly depleted, reflecting a contribution of methane-derived carbon.

Cited by 32 publications

References 79 publications

Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to <i>Zostera noltii</i> beds

Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to <i>Zostera noltii</i> beds

Seasonal dependence on seagrass detritus and trophic niche partitioning in four copepod eco-morphotypes

Lack of population genetic structure in the marine nematodes Ptycholaimellus pandispiculatus and Terschellingia longicaudata in beaches of the Persian Gulf, Iran

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Trophodynamics of estuarine intertidal harpacticoid copepods based on stable isotope composition and fatty acid profiles

Abstract: 13C of Cletodidae were highly depleted, reflecting a contribution of methane-derived carbon.

Cited by 32 publications

References 79 publications

Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to &lt;i&gt;Zostera noltii&lt;/i&gt; beds

Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to &lt;i&gt;Zostera noltii&lt;/i&gt; beds

Seasonal dependence on seagrass detritus and trophic niche partitioning in four copepod eco-morphotypes

Lack of population genetic structure in the marine nematodes Ptycholaimellus pandispiculatus and Terschellingia longicaudata in beaches of the Persian Gulf, Iran

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Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to <i>Zostera noltii</i> beds

Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to <i>Zostera noltii</i> beds