Active and passive aspects of meiobenthic copepod dispersal at two sites near I Mustang Island, Texas

Kern, JC

doi:10.3354/meps060211

Cited by 25 publications

(14 citation statements)

References 17 publications

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“…Their study revealed that relative to adults, resuspension rates by late stage nauplii and all copepodite stages was infrequent. Contrary results obtained here and by Kern (1990) suggest that sediment abundance variability is indeed flow/body size interactive. Copepodites are the smallest postlarval individuals in the P. megarostrum population, with average body volumes about one-third that of adult females.…”

Section: Discussioncontrasting

confidence: 54%

“…nematodes or copepods, or of individual species. Apart from Kern's (1990) investigation of the effects of subtidal flow fields on copepods near Mustang Island, Texas (USA) none has addressed what impact these variables might have on various life history categories within a species.…”

Section: Discussionmentioning

confidence: 99%

“…that a proportion of normally benthic organisms end up in the water column for limited periods of time. Here they are presented with opportunities for small scale dispersal and to elicit premating contacts (Bell et al 1988, Kern 1990), yet they may become increasingly exposed to removal by midwater predators. The evolutionary consequences of this process become powerfully focused when midwater events such as these are interpreted as contributing to outbreeding and gene dispersal.…”

Section: Discussionmentioning

confidence: 99%

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Tidal and diel fluctuations in abundance of meiobenthic copepods on an intertidal estuarine sandbank

Hicks¹

1992

Mar. Ecol. Prog. Ser.

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Short-term changes in the population density of 2 abundant species of sand dwelling rneiobenthic copepod and the population structure of the dornlnant species have been investigated in a New Zealand estuary. Samples were collected every 2 h for 24 h in a sampling regime that spanned 2 tidal cycles and 1 day/night cycle. Average sediment densities of Parastenhelia megarostrum were higher during periods of exposure than during periods of cover by tidal waters. Mean abundance of juveniles (copepodites) and adult males differed significantly in relation to the state of the tide. Females with and without egg sacs only indicate day/night differences at low tide. There were no tidal or diel differences in abundance for the interstitial species Paraleptastacus sp. For P. megarostrum, it is suggested that sediment abundance variability is tidal current flow/body size interactive. While the role of passive erosion is clearly important, it is argued that behavioural factors might also predispose copepodites to resuspension in the overlying water column. Die1 differences in abundance of adult females may indicate a response to changes in patchiness of presumed autotrophic food resources.

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Section: Discussioncontrasting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Tidal and diel fluctuations in abundance of meiobenthic copepods on an intertidal estuarine sandbank

Hicks¹

1992

Mar. Ecol. Prog. Ser.

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“…Historically, researchers have targeted the processes governing either movement into or settlement out of the water column, but not both (e.g. Armonies 1988a, Fegley 1988, Kern 1990, Walters 1991. Separate studies of copepod advection (Palmer & Gust 1985) and the colonization of defaunated sediments in hydrodynamically active habitats (Sherman & Coull 1980, Chandler & Fleeger 1983, Kern & Taghon 1986, Fegley 1988) suggest a direct connection between pelagic dispersal and benthic recruitment.…”

Section: Introductionmentioning

confidence: 99%

Significance of copepod emergence to benthic, pelagic, and phytal linkages in a subtidal seagrass bed

Walters¹,

Bell²

1994

Mar. Ecol. Prog. Ser.

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The role of meiobenthic copepod emergence in linkages among benthic, pelagic, and phytal habitats was examined in a subtidal seagrass (Tl~alassia testudjnurn) bed at the mouth of Tampa Bay, Florida. USA. On 4 dates the ability of emerging copepods to affect the density and composition of benthic and phytal assemblages was tested during 2 h periods of minimum and maximum emergence. Copepod exchanges between benthic and phytal habitats and the duration of pelagic excursions also were examined throughout a night by measuring settlement into 2 types of sediment traps and onto natural and defaunated seagrass blades. The ability of emerging fauna to disperse through the water column was determined from horizontal collectors. Changes In copepod densities and composition during periods of active emergence did not indicate an unequivocal exchange between sediment and seagrass blade assemblages. Copepod resettlement onto the sediments was greater during periods of increased emergence and suggested that emerging copepods typically did not remain in the water column for a prolonged (> 2 h) time. The dispersal of copepods through the water column was haphazard and unaffected by prevailing currents. Species and habitat affiliation influenced both the dispersal and settlement behaviors of emerging copepods. Although appreciable numbers of sediment-associated copepods can enter and disperse through the water column, our results suggest that the effects of emergence on linkages between benthic, pelagic, and phytal habitats are minimal or limited in duration.

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“…sand versus seagrass; Hicks 1986). Within habitats, emergence may vary with food concentration, intraspecific density, and age composition (Service and Bell 1987;Kern 1990), the latter may in part derive from differential feeding habits of adults and juveniles (Decho and Fleeger 1988). Therefore, when including markedly different habitats some extra experiments should be done to check for habitat-specific differences in emergence.…”

Section: Modifications For Other Geographical Areas or Other Taxamentioning

confidence: 99%

A method for rapid abundance estimation of semiplanktonic meiofauna

Armonies

2000

Helgol Mar Res

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Many meiofaunal copepods and plathelminths enter the tidal waters at night thus exhibiting a life-style intermediate between benthic and planktonic. At the same time, ostracods may leave their interstitial dwelling and move across the sediment surface. In laboratory experiments, the percentage of plathelminth populations emerging from the sediment varied with the species, temperature, light conditions, and the dimensions of the sediment cores studied, but not with tidal level, season, ambient density of conspecifics, or the sediment composition. Therefore, the swimming activity may be utilised for extraction of semiplanktonic meiofauna provided that the extraction procedure is standardised with respect to temperature, light and core size. For free-living plathelminths from the Wadden Sea intertidal a robust standard procedure is as follows: sediment cores 1.6 cm in diameter (2 cm 2 surface area) and 3 cm deep are fitted into cylindrical containers and submerged into aquaria containing filtered seawater (ambient salinity, room temperature, darkness) for 24 h. The sediment containers are then removed and the aquarian water filtered through appropriate meshes; the residue contains the emergent faunal component. For plathelminths, this procedure reduces sorting time by some 90% compared with the standard shaking-decantation method and thus makes it possible to process a high number of samples in a short time. Similar procedures may be developed for copepods and epibenthic ostracods.

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Active and passive aspects of meiobenthic copepod dispersal at two sites near I Mustang Island, Texas

Cited by 25 publications

References 17 publications

Tidal and diel fluctuations in abundance of meiobenthic copepods on an intertidal estuarine sandbank

Tidal and diel fluctuations in abundance of meiobenthic copepods on an intertidal estuarine sandbank

Significance of copepod emergence to benthic, pelagic, and phytal linkages in a subtidal seagrass bed

A method for rapid abundance estimation of semiplanktonic meiofauna

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