Adult life and emergence of <i>Dolania americana</i> in Northwestern Florida (Ephemeroptera: Behningiidae)

Peters, William L.; Peters, Janice G.

doi:10.1002/iroh.1977.3510620306

Cited by 29 publications

(26 citation statements)

References 19 publications

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“…There were two abundant predators which presumably preyed upon the smaller midges: the midge Robackia claviger and one or more species of the Jones 1973, Peters andPeters 1977), but they were extremely rare in the Satilla. Although standing stock biomass was variable through time for the major groups and seemed unrelated to discharge, there appeared to be some recognizable patterns of abundance ( Figs.…”

Section: Sandy Benthos Productionmentioning

confidence: 99%

Invertebrate Productivity in a Subtropical Blackwater River: The Importance of Habitat and Life History

Benke¹,

Arsdall²,

Gillespie³

et al. 1984

Ecological Monographs

478

244

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Habitat and life history are critical elements in assessing the production dynamics of invertebrates and their role in aquatic ecosystems. We studied invertebrate productivity at two sites in a subtropical blackwater river (the Satilla) in the Lower Coastal Plain of Georgia, USA, and found that submerged wooden substrates, or snags, are heavily colonized by aquatic insects. We compared invertebrate productivity on the snag habitat with productivity in the sandy benthic habitat of the main channel, and the muddy benthic habitat of the backwaters. The size—frequency method was applied to individual taxa in order to determine total invertebrate productivity. Emphasis was placed on the importance of the length of larval life, or the cohort production interval, in determining biomass turnover rates. The diversity of taxa was much higher on the snag habitat than in either of the benthic habitats. Filter—feeding caddisflies (especially Hydropsyche spp.) and black flies (Simulium spp.) were the major consumers on the snag habitat. Several species of midges, mayflies, and beetles also were abundant. Total densities, standing stock biomass, and production were very high for primary consumers on snags. Annual production was 51.9 and 67.1 g°m—2°yr—1 (dry mass per surface area of snag, or effective habitat) for the two sites. Hellgrammites, dragonflies, and stoneflies were the major insect predators colonizing snags, and their production was 5.5 and 5.2 g@mm—2°yr—1 (effective habitat). Annual production/biomass ratios (P/B) were usually 5—10 for insects that had univoltine or bivoltine life cycles. Annual P/B estimates were very high for midges (>100) and black flies (>70), since length of larval life was estimated to be very short. The sandy—substrate benthos consisted almost exclusively of very small midges with oligochaetes of lesser abundance. Densities were quite high (>20 000/m2), but biomass was very low (° 100 mg/m2 or less). Production of primary consumers was >11 g°m—2°yr—1 with a very high estimate of annual P/B (166—227). The major predators were Ceratopogonidae (biting midges) larvae with an annual production of 1.6—2.6 g°m—2°yr—1. The muddy—substrate benthos consisted primarily of oligochaetes (Limnodrilus) and midges. Annual production was °7—10 g°m—2°yr—1 for primary consumers. The major predators were larger Tanypodinae midges. On a substrate surface area basis, standing stock biomass on snags was 20—50 times higher than in the sandy habitat and 5—10 times higher than in the muddy habitat. Production on snags was only 3—4 times higher than production in the benthic habitats, with higher annual P/B in the latter. The production estimates for the snag habitat are among the highest yet reported for lotic ecosystems, and it appears that production on snags is limited by available substrate. Habitat areas per length of shoreline were estimated so that we could approximate relative amounts of biomass and production for a stretch of river. Although the snag habitat accounted for only °6% of the effective habitat subs...

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Section: Sandy Benthos Productionmentioning

confidence: 99%

Invertebrate Productivity in a Subtropical Blackwater River: The Importance of Habitat and Life History

Benke¹,

Arsdall²,

Gillespie³

et al. 1984

Ecological Monographs

478

244

View full text Add to dashboard Cite

show abstract

“…The species is reported to have a two year life cycle in South Carolina (Harvey et al, 1980) and in northern Florida (Peters et al, 1987). All populations are characterized by an unusually short reproductive period on both a diel and seasonal basis (Peters and Peters, 1977;Sweeney and Vannote, 1982). For example, practically all larvae in a given population undergo metamorphosis within a 7-10 day period in late spring and, on a given day, the winged stage lasts only about 10 to 30 minutes.…”

Section: Introductionmentioning

confidence: 98%

Population genetics of the burrowing mayflyDolania americana:geographic variation and the presence of a cryptic species

Sweeney

Funk

1991

Aquatic Insects

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The genetic structure of Dolania populations in South Carolina, Alabama, and Florida was examined using starch gel electrophoresis. All study populations except Alabama consisted entirely of D. americana Edmunds and Traver. Electrophoresis revealed that the Alabama site contained both D. americana and an undescribed species (D. sp. nov.), with the latter taxon predominating. Individuals of the two taxa had nearly fixed allelic differences at two loci (Est 4 and Gda). The extent of genetic differentiation between populations of the two taxa in the same river or between adjacent river systems was significantly greater than between D. americana populations separated by large geographic distances. Populations of both species were characterized by relatively normal levels of polymorphic loci (average = 23%) but unusually low levels of heterozygosity (average = 0.03). Genetic variation between the Florida and South Carolina populations of D. americana was statistically significant. There was also some indication of slight genetic differentiation among populations of D. americana within the Blackwater River in Florida. No significant genetic variation was observed between cohorts of D. americana at a given site.

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“…album dropped out of the swarm immediately after they had mated, and expelled their eggs. Peters & Peters (1977), however, often observed several males of Dolania americana mating with the same female. Therefore, we cannot definitely conclude that the females of £.…”

Section: Discussionmentioning

confidence: 99%

Timing of emergence of males and females of Ephoron shigae (Ephemeroptera: Polymitarcyidae)

1989

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1. The winged adults of E/j/iomn^/iigfle swarming overlhe water surface were collected by successive random sweeps during their daily emergence period, and the changes in sex and stage composition were examined, in the lower reach of the Asahi River in western Japan.2. The emergence occurred mainly during a 1 ' /2 h period beginning some time after sunset. Male sub-imagos emerged synchronously and moulted to imagos in a 25 min period immediately prior to an abrupt increase of female emergence.3. This timing of male emergence may be considered the result of selection of males to decrease the risk of death before mating, and for all the males to have an equal opportunity to mate.

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Adult life and emergence of Dolania americana in Northwestern Florida (Ephemeroptera: Behningiidae)

Cited by 29 publications

References 19 publications

Invertebrate Productivity in a Subtropical Blackwater River: The Importance of Habitat and Life History

Invertebrate Productivity in a Subtropical Blackwater River: The Importance of Habitat and Life History

Population genetics of the burrowing mayflyDolania americana:geographic variation and the presence of a cryptic species

Timing of emergence of males and females of Ephoron shigae (Ephemeroptera: Polymitarcyidae)

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