Emergence of Stoneflies (Plecoptera) from the Roseau River, Manitoba

Flannagan, John F.; Cobb, D. G.

doi:10.2307/2426368

Cited by 10 publications

(12 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Factors triggering the emergence of stoneflies are not fully understood, but it is well‐known that thermal summation (degree‐days) and the actual stream temperature are important, as are photoperiod, nymph fitness and inter‐ and intraspecific competition in the nymphal stage (Brinck, 1949; Elvang & Madsen, 1973; Hynes, 1976; Sweeney & Vannote, 1986; Flannagan & Cobb, 1991; Peckarsky & Cowan, 1991). In our study the timing of the emergence of L. nigra seemed to be triggered mainly by a stream temperature above 7 °C, probably combined with the sum of degree‐days, whereas neither photoperiod nor nymph fitness could explain the displacement of the emergence in A1 compared with N1.…”

Section: Discussionmentioning

confidence: 99%

Growth and emergence of the stonefly Leuctra nigra in coniferous forest streams with contrasting pH

Thomsen¹,

Friberg²

2002

Freshwater Biology

View full text Add to dashboard Cite

1. Growth and emergence of the acidification tolerant stonefly Leuctra nigra were studied in four coniferous forest streams with contrasting pH. Invertebrate samples were taken bimonthly during May 1997 to April 1998. Emerging L. nigra were captured in two of the streams during April to July 1998 using pyramidal emergence traps. In addition, a laboratory experiment was conducted to evaluate growth of L. nigra in response to variations in food quality (neutral or acid conditioned leaves) and water pH. 2. The invertebrate community in low pH streams had lower diversity and density compared with neutral streams. Abundance of L. nigra was also lower, despite the dominance of this stonefly in the invertebrate community in the acidic streams. 3. Secondary production of L. nigra was 2.04 and 3.07 g DW m–2 year–1 in the neutral streams compared with 1.02 and 1.27 g DW m–2 year–1 in the acidic streams. The P/B ratio differed only slightly among streams. 4. More adult L. nigra emerged in the neutral stream compared with the acidic stream, despite the density of the pre‐emerging fifth instar nymphs of L. nigra being similar in the two streams. Adult size (expressed as wing length) and female fitness were also significantly greater in the neutral stream. 5. Laboratory growth of L. nigra nymphs was significantly lower when fed acid conditioned alder leaves rather than neutral conditioned leaves. There was no difference in growth when nymphs were fed neutral conditioned leaves in acid and neutral water. 6. Our study shows multiple, sub‐lethal effects on life history of the acidification tolerant stonefly L. nigra in coniferous streams with low pH. The results suggest that these effects could be mediated primarily by low food quality. These findings add to the existing evidence that coniferous plantation forestry has a negative impact on stream ecosystems.

show abstract

Section: Discussionmentioning

confidence: 99%

Growth and emergence of the stonefly Leuctra nigra in coniferous forest streams with contrasting pH

Thomsen¹,

Friberg²

2002

Freshwater Biology

View full text Add to dashboard Cite

show abstract

“…In a 2‐year study of Pteronarcys californica (Newport), Poole (1981) observed that nymphs emerged 2 weeks earlier in the drier of the 2 years and speculated that higher water temperature was responsible for the difference. Flannagan & Cobb (1991) observed a difference of 6–10 days in the emergence timing of a number of Plecoptera species collected from a Canadian river, attributing the difference to temperature.…”

Section: Introductionmentioning

confidence: 94%

Effect of springtime water temperature on the time of emergence and size of Pteronarcys californica in the Henry's Fork catchment, Idaho, U.S.A.

Gregory¹,

Beesley²,

Kirk

2000

Freshwater Biology

View full text Add to dashboard Cite

1. The emergence time of Pteronarcys californica in streams in the Henry's Fork catchment, Idaho, U.S.A. was negatively correlated with mean April water temperature. Emergence was in mid‐ to late May at sites influenced by groundwater, where April water temperature averaged 7.9 °C. Adults emerged in mid‐June in streams receiving run‐off from snowmelt (mean April water temperature 5.4 °C). Intermediate emergence times were observed in a regulated section of river where water temperature was influenced, on one bank, by dam release (mean April water temperature 4.5 °C) and, on the other, by a spring‐fed tributary stream (mean April water temperature 6.3 °C).  2. During each of the three study years, emergence was earlier on the bank of the regulated section that was warmer during April and May. The mean body length of P. californica exuviae, collected from the warm side of the river, averaged 1.2 mm longer than those collected from the cold side.  3. We tested the effect on emergence of altering springtime water temperature by translocating P. californica in cages from one location to another during April. Individuals moved to sites with higher April water temperature emerged earlier than individuals that remained at the site from which they were collected.

show abstract

“…Most often, their emergence periods are synchronous and short, with different species emerging in temporal succession (Hynes, 1976;Zwick, 2011). Although many environmental factors influence emergence of aquatic insects, water temperature and photoperiod have been recognized as the most important for stonefly emergence (Hynes, 1976;Flannagan and Cobb, 1991;DeWalt and Stewart, 1995;Zwick, 2011;Ivković et al, 2014;.…”

Section: Introductionmentioning

confidence: 99%

Environmental drivers influencing stonefly assemblages along a longitudinal gradient in karst lotic habitats

et al. 2018

View full text Add to dashboard Cite

Stoneflies are among the most sensitive aquatic insect taxa and therefore arguably the best indicator of the excellent, i.e. pristine, ecological status of surface streams. Karst habitats are one of the most exciting freshwater habitats in terms of biological-geological interplay. They, in turn, support a biodiversity far superior to surrounding freshwater habitats and hence these habitats are designated as biodiversity hotspots. Our study deals with both of these crucial ecological players. We studied stonefly assemblages, their microhabitat preferences and emergence patterns along a karst oligotrophic hydrosystem. The sampling was conducted monthly from March 2007 to December 2008 using pyramid-type emergence traps set in various habitats and associated microhabitats (e.g. springs, rivers, streams, tufa barriers×moss, angiosperm, cobble, sand, silt substrates). Favorable environmental conditions, such as a wide range of karst habitat types with low water temperature and high oxygen concentration, resulted in high stonefly species richness (31 recorded species). Water temperature and pH had the highest influence on stonefly assemblages. Species richness and diversity decreased in a downstream direction. We recorded a longitudinal shift from crenal-epirhithral to epirhithral-metarhithral assemblages with some hyporhithral and potamal elements. Upstream sites were dominated by shredders, while downstream sites had a higher proportion of gatherers-collectors. Several species showed a significant preference for a specific microhabitat type in accordance with their feeding strategies and food availability. The majority of recorded species exhibited univoltine life cycles slow or fast.

show abstract

Emergence of Stoneflies (Plecoptera) from the Roseau River, Manitoba

Cited by 10 publications

References 0 publications

Growth and emergence of the stonefly Leuctra nigra in coniferous forest streams with contrasting pH

Growth and emergence of the stonefly Leuctra nigra in coniferous forest streams with contrasting pH

Effect of springtime water temperature on the time of emergence and size of Pteronarcys californica in the Henry's Fork catchment, Idaho, U.S.A.

Environmental drivers influencing stonefly assemblages along a longitudinal gradient in karst lotic habitats

Contact Info

Product

Resources

About