Algae, bacteria and detritus as food for the harpacticoid copepod, Heteropsyllus pseudonunni Coull and Palmer

Ustach, Joseph F.

doi:10.1016/0022-0981(82)90010-7

Cited by 34 publications

(15 citation statements)

References 17 publications

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“…It is thus possible that macrophytodetritus accumulations yield a more readily available food for harpacticoids in contrast to other habitats and this will attract them (Norkko and Bonsdorff, 1996). However, laboratory and field studies stated that the meiofaunal detritus-feeders primarily rely on the micro-epiphytes associated with the leaf litter surface (Carman and Thistle, 1985;Hicks and Coull, 1983;Ustach, 1982). In this study site, the leaf litter epiphytes consisted of an abundant community of micro-epiphytic organisms such as bacteria, marine fungi, protozoa, micro-and detrital-algae .…”

Section: Harpacticoid Copepod Species Assemblage In Detritusmentioning

confidence: 99%

Seasonal variability of meiofauna, especially harpacticoid copepods, in Posidonia oceanica macrophytodetritus accumulations

Mascart

Lepoint

Deschoemaeker

et al. 2015

Journal of Sea Research

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The overall aim of this study was (1) to assess the diversity and density of meiofauna taxa, especially harpacticoid copepod species, present within accumulated seagrass macrophytodetritus on unvegetated sand patches and (2) to elucidate the community structure of detritus-associated harpacticoid copepods in relation to natural temporal variability of physico-chemical characteristics of accumulations. This was investigated in a Posidonia oceanica (L.) Delile seagrass ecosystem in the northwest Mediterranean Sea (Bay of Calvi, Corsica, 42°35′N, 8°43′E) using a triplicate macrophytodetritus core field sampling in two contrasting sites over the four seasons of 2011. Meiofauna higher taxa consisted of 50% Copepoda, of which 87% belonged to the Harpacticoida order. Nematoda was the second most abundant taxa. The copepod community displayed a wide variety of morphologically similar and ecologically different species (i.e. mesopsammic, phytal, phytal-swimmers, planktonic and parasitic). The harpacticoid copepod community followed a strong seasonal pattern with highest abundances and species diversity in May-August, revealing a link with the leaf litter epiphyte primary production cycle. Aside from the important role in sheltering, housing and feeding potential of macrophytodetritus, a harpacticoid community BEST analysis demonstrated a positive correlation with habitat complexity and a negative correlation with water movements and P. oceanica leaf litter accumulation.

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Section: Harpacticoid Copepod Species Assemblage In Detritusmentioning

confidence: 99%

Seasonal variability of meiofauna, especially harpacticoid copepods, in Posidonia oceanica macrophytodetritus accumulations

Mascart

Lepoint

Deschoemaeker

et al. 2015

Journal of Sea Research

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“…In contrast to the high PUFA content of diatoms, bacteria generally have a low PUFA content (Yazawa et al 1988, Kaneda 1991. Nevertheless, bacteria may be nutritiously suitable for copepods that do not exhibit reduced reproduction when fed diets deficient in EPA and DHA (Ustach 1982, Norsker & Støttrup 1994. Acting as first consumers of primary production and as a food source for higher trophic levels (e.g.…”

Section: Introductionmentioning

confidence: 99%

Bioconversion of fatty acids at the basis of marine food webs: insights from a compound-specific stable isotope analysis

Troch

Boeckx²,

Cnudde³

et al. 2012

Mar. Ecol. Prog. Ser.

129

100

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“…Diatoms are known from both laboratory and field studies to be an important food resource of many meiobenthc harpacticoids (Lee et al 1976, Sellner 1976, Brown & Sibert 1977, Harris 1977, Lee et al 1977, Vanden Berghe & Bergmans 1981, Ustach 1982, Admiraal et al 1983, Montagna 1984, Carman & Thistle 1985, Lee et al 1985, Chandler 1986, Decho 1986, Decho & Castenholz 1986, Nilsson 1987, Decho & Fleeger 1988a. Laboratory studies (Decho 1986) have indicated that certain harpacticoids consume diatom food resources at different rates over portions of a simulated tidal cycle.…”

Section: Introductionmentioning

confidence: 99%

How do harpacticoid grazing rates differ over a tidal cycle? Field verification using chlorophyll-pigment analyses

Decho¹

1988

Mar. Ecol. Prog. Ser.

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Four specles of meiobenthic copepods were examined for dlatom feeding Microscopic analysis of gut-pellet contents from field-collected in&viduals ~n&cated frequent Ingestion of diatoms by 3 harpacticoids (Scottolana canadensis, Microarthndon Ottorale Cletocamptus deitersi) whlle occasional &atom ingestion occurred m Paronychocamptus huntsmani Frustules were usually empty and broken indicahng that contents were d~gested Laboratory expenments using 14C-labehng showed assimilation of diatoms by the 3 species examined Fleld grazing rate s t u b e s were conducted over different portions of a hdal cycle using fluorescent chlorophyll-plgment analysls of gut-contents H~g h e s t dlatom consumphon (p < 0 05) occurred just after the mudflat became exposed (i e Early Low Water level, ELW) for S canadensis, while consumptlon at Late Low Water (LLW i e after mudflat is exposed for several hours) was reduced M llttorale showed a somewhat similar pattern in that highest consumptlon rates (p < 0 05) also occurred dunng ELW However, during High Water (HW) and LLW a similar (but reduced) feeding rate was measured P huntsmani appeared to only ingest &atoms (1 e chlpigments) dunng HW Relationships of feeding processes over a tidal cycle are discussed with regard to distributional patterns in intertidal and subtidal habitats

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Algae, bacteria and detritus as food for the harpacticoid copepod, Heteropsyllus pseudonunni Coull and Palmer

Cited by 34 publications

References 17 publications

Seasonal variability of meiofauna, especially harpacticoid copepods, in Posidonia oceanica macrophytodetritus accumulations

Seasonal variability of meiofauna, especially harpacticoid copepods, in Posidonia oceanica macrophytodetritus accumulations

Bioconversion of fatty acids at the basis of marine food webs: insights from a compound-specific stable isotope analysis

How do harpacticoid grazing rates differ over a tidal cycle? Field verification using chlorophyll-pigment analyses

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