Desiccation Resistance inTigriopus californicus(Copepoda, Harpacticoida)

Powlik, James J.; Lewis, A.G.

doi:10.1006/ecss.1996.0085

Cited by 14 publications

(21 citation statements)

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“…The lack of dispersal could explain increased temporal variability in the same manner if birth or mortality rates vary temporally. Environmental stress has been demonstrated to be the cause of great fluctuations, including extinction and recolonization, in the intertidal marine copepod Tigriopus californicus, a species with no planktonic period (Dybdahl 1994, Powlik andLewis 1996). The population responds directly to variability in local environmental conditions, which is high in high intertidal tidepools, without any homogenization by dispersal.…”

Section: Discussionmentioning

confidence: 99%

Effects of the Planktonic Period on Marine Population Fluctuations

Eckert

2003

Ecology

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How and why populations fluctuate and what drives the magnitude of fluctuations are questions that have long intrigued ecologists. Dispersal may dampen population fluctuations through the effect of spreading offspring over heterogeneous habitats. The planktonic period common in many marine organisms, therefore, could dampen population fluctuations through larval dispersal. However, emphasis on the hazards of planktonic life predicts that species that have a longer planktonic period have greater fluctuations in adult populations than species with shorter or no planktonic period. I analyzed the population variation of 570 time series from the literature for intertidal and benthic subtidal marine species and found that time series of adult populations for species with no planktonic period had greater fluctuations than time series for species with a planktonic period (both short and long planktonic period). In addition, there was no difference in fluctuation of adult and recruit time series between species with long and short planktonic periods. The planktonic period did not appear to result in increased population fluctuations, as was widely assumed. Rather, the planktonic period may be acting to decrease population fluctuations, potentially by dispersal. Corresponding Editor: J. E. Duffy.

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Section: Discussionmentioning

confidence: 99%

Effects of the Planktonic Period on Marine Population Fluctuations

Eckert

2003

Ecology

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“…Despite recording extinction events, Dybdahl concluded, from genetic evidence, that T. californicus was not persisting as a classical metapopulation. Powlik & Lewis (1996) suggest that Dybdahl may have underestimated the desiccation resistance of T. californicus, leading to misidentification of extinction events. The refuge value of sediment and green algae (Enteromorpha spp.)…”

Section: Discussionmentioning

confidence: 99%

“…can tolerate broad ranges of salinities and temperatures (Damgaard & Davenport 1994), although the limits of thermal tolerances tend to be species-specific (Davenport et al 1997). T. californicus and T. brevicornis possess a dormancy response which appears to aid survival, particularly in the face of extreme salinities and temporary loss of pool water by evaporation (Fraser 1936a, Ranade 1957, Powlik & Lewis 1996. T. californicus has several feeding appendages that facilitate an omnivorous diet including detritus, faecal pellets, protists, diatoms and small crustaceans (Lewis et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Metapopulation dynamics of Tigriopus brevicornis (Harpacticoida) in intertidal rock pools

Johnson¹

2001

Mar. Ecol. Prog. Ser.

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“…For each sampler, a total of 9 trials were conducted over a period of 12 hours, hence potential error associated with life stage molts was minimized. All counts were adjusted to reflect the actual volume of water collected by each sampler, per POWLIK & LEWIS (1996). After all trials were completed, all copepods in the dish rinsed out, categorized, and enumerated.…”

Section: Methodsmentioning

confidence: 99%

“…The species exhibits six naupliar and six copepodite stages from the egg through the mature adult. It is found on the shores of nearly every ocean, and can flourish in its shallow (typically less than 10 cm), low volume (l to 1000 liters) natural microcosms to densities of over 200 000 individuals· I-I (POWLIK & LEWIS 1996;POWLIK & al. 1997).…”

Section: Introductionmentioning

confidence: 99%

A comparison of methods for sampling splashpool copepoda

Powlik

1998

Sarsia

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SARSIA POWLlK, JAMES J. 19980828. A comparison of methods for sampling splashpool copepoda. -Sarsia 83:219-223. Bergen. ISSN 0036-4827.Collection methods for micro-and meiofauna within high shore splashpools are compared using four simple, hand-held devices, with the supralittoral harpacticoid copepod Tigriopus calif amicus as a representative organism. For the collection of all T. calif amicus life-history stages, over a range of potential densities and with a minimum of specimen damage, a 30 ml graduated pipette is demonstrably more efficient than bottles, preparation dishes, or small nets. Collection ofnauplii and gravid females, which typically subsist closer to the substratum and in pits or crevices in the bedrock, was particularly better using the pipette, which generates a rapid suction, produces less overall disturbance than larger devices, and can be used over a broad range of pool sizes without modification. For analysis, pipettes provide a smaller, more concentrated sample, reducing processing time and the potential for handling error.

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Desiccation Resistance inTigriopus californicus(Copepoda, Harpacticoida)

Cited by 14 publications

References 0 publications

Effects of the Planktonic Period on Marine Population Fluctuations

Effects of the Planktonic Period on Marine Population Fluctuations

Metapopulation dynamics of Tigriopus brevicornis (Harpacticoida) in intertidal rock pools

A comparison of methods for sampling splashpool copepoda

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