Studies on Feeding, Digestion, and Food Storage in Free-Living Flatworms (Platyhelminthes: Turbellaria)

Jennings, J. B.

doi:10.2307/1538879

Cited by 165 publications

(85 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It can be assumed, therefore, that d 13 C of Daphnia and Bryozoa reflects the material they filter from the water column. Rhabdocoela are active predators feeding on small invertebrates and large ciliate protozoans as well as scavengers (Jennings 1957;Kolasa and Tyler 2010). In contrast to benthic chironomids and filter-feeding Daphnia and bryozoa, rhabdocoels are probably less directly affected by changes in d 13 C values of phytoplankton or SOM but have a d 13 C signature representing a mixture of their prey organisms.…”

Section: Feeding Ecology Of Invertebrate Groupsmentioning

confidence: 99%

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

et al. 2014

View full text Add to dashboard Cite

Taxon-specific stable carbon isotope (d 13 C) analysis of chitinous remains of invertebrates can provide valuable information about the carbon sources used by invertebrates living in specific habitats of lake ecosystems (for example, sediments, water column, or aquatic vegetation). This is complementary to d 13 C of sedimentary organic matter (SOM), which provides an integrated signal of organic matter produced in a lake and its catchment, and of diagenetic processes within sediments. In a sediment record from Strandsjön (Sweden) covering the past circa 140 years, we analyzed SOM geochemistry (d 13 C, C:N atomic , organic carbon content) and d 13 C of chitinous invertebrate remains in order to examine whether taxon-specific d 13 C records could be developed for different invertebrate groups and whether these analyses provide insights into past changes of organic carbon sources for lacustrine invertebrates available in benthic and planktonic compartments of the lake. Invertebrate taxa included benthic chironomids (Chironomus, Chironomini excluding Chironomus, Tanytarsini, and Tanypodinae), filter-feeders on suspended particulate organic matter (Daphnia, Plumatella and Cristatella mucedo), and Rhabdocoela. d 13 C of chironomid remains indicated periodic availability of 13 C-depleted carbon sources in the benthic environment of the lake as d 13 C values of the different chironomid taxa fluctuated simultaneously between -34.7 and -30.5 % (VPDB). Daphnia and Bryozoa showed parallel changes in their d 13 C values which did not coincide with variations in d 13 C of chironomids, though, and a 2-3 % decrease since circa AD 1960. The decrease in d 13 C of Daphnia and Bryozoa could indicate a decrease in phytoplankton d 13 C as a result of lower lake productivity, which is in accordance with historical information about the lake that suggests a shift to less eutrophic conditions after AD 1960. In contrast, Rhabdocoela cocoons were characterized by relatively high d 13 C values (-30.4 to -28.2 %) that did not show a strong temporal trend, which could be related to the predatory feeding mode and wide prey Author's personal copy spectrum of this organism group. The taxon-specific d 13 C analyses of invertebrate remains indicated that different carbon sources were available for the benthic chironomid larvae than for the filter-feeding Daphnia and bryozoans. Our results therefore demonstrate that taxon-specific analysis of d 13 C of organic invertebrate remains can provide complementary information to measurements on bulk SOM and that d 13 C of invertebrate remains may allow the reconstruction of past changes in carbon sources and their d 13 C in different habitats of lake ecosystems.

show abstract

Section: Feeding Ecology Of Invertebrate Groupsmentioning

confidence: 99%

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Available information suggests substantial differences in feeding ecology exist between the triclads and rhabdocoels (Maly, Schoenholtz, & Arts, 1980;Schwartz & Hebert, 1982;Young 1973Young , 1978. Triclads are able to feed on zooplanktonic prey (Hyman, 1951;Jennings, 1957Jennings, , 1964Pickavance, 1971aPickavance, , 1971bAdams, 1980) but prefer to feed almost exclusively on the benthos (Reynoldson, 1983). In contrast, some rhabdocoels, such as members of the genus Mesostoma, prey actively on zooplankton (Maly et al, 1980;Schwartz & Hebert, 1982).…”

Section: Introductionmentioning

confidence: 99%

Prey preference and utilization by Mesostoma lingua (Turbellaria, Rhabdocoela) at a low arctic site

Schwartz

1986

Hydrobiologia

View full text Add to dashboard Cite

show abstract

“…A few flatworms may feed principally on bacteria and micro-algae . Known prey items include diatoms, ciliates, hydroids nematodes, other turbellarians, small crustaceans, annelids and tunicates (see Martens & Schockaert, 1986 ;Jennings, 1957) .…”

Section: Interactionsmentioning

confidence: 99%

Where Turbellaria? Concerning knowledge and ignorance of marine turbellarian ecology

Boaden

1995

Hydrobiologia

View full text Add to dashboard Cite

Present knowledge of marine free-living turbellarians is reviewed in the light of a standard ecological text . Little is known of their ecological adaptations or fitness but they are clearly successful animals . Diversity within communities can be considerable, possibly relating to the small size of individuals and temporal and spatial resource gradients .Little is known about genetic diversity, environmental tolerances and demography . Local distribution patterns are better known but rarely proven with appropriate statistics . New data from work in Northern Ireland on behaviour and habitat choice of Procerodes littoralis and on species richness, population aggregation and microdistribution of meiofaunal turbellarians is presented .Nothing appears known about intra-specific competition but more about inter-specific relationships including responses to biogenic structures . Dietary information is sparse and mostly observational with little known about feeding efficiency. Studies at Sylt have revealed mainly univoltine or polyvoltine annual life cycles partly related to habitat preference and possibly giving some evidence of r and K selection . Factors controlling local abundance are largely uninvestigated and the reasons for the apparent rarity of many species not understood .Lists and counts of turbellarians within particular habitats provide some knowledge of community structure but very few numerical analyses, e .g . of diversity and similarity, exist . Contribution to energy flux and to structuring communities has not been determined in spite of the turbellarians' assumed major role as meiofaunal predators .Nevertheless marine turbellarians appear particularly fitted to studies such as habitat heterogeneity, community stability and biogeography and are surely suitable subjects for field and laboratory experiments . There is no lack of direction for studies to proceed . Impulsion is required . 91

show abstract

Studies on Feeding, Digestion, and Food Storage in Free-Living Flatworms (Platyhelminthes: Turbellaria)

Cited by 165 publications

References 8 publications

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

Taxon-specific δ13C analysis of chitinous invertebrate remains in sediments from Strandsjön, Sweden

Prey preference and utilization by Mesostoma lingua (Turbellaria, Rhabdocoela) at a low arctic site

Where Turbellaria? Concerning knowledge and ignorance of marine turbellarian ecology

Contact Info

Product

Resources

About