Combined effects of photoperiod and temperature on the diapause of an intertidal chironomid

Neumann, Dietrich; Kruger, M.

doi:10.1007/bf00378469

Cited by 12 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Individuals emerging early during spring and later in autumn when temperatures are cool tend to have a bigger size than those emerging when it is warmer during summer. Some chironomid species undergo larval diapause during unfavourable conditions (Oliver, 1971;Neumann & Krüger, 1985). We presumed that P. crassinervis probably adapts to winter temperature by arresting larval development during the winter months.…”

Section: Discussionmentioning

confidence: 99%

Insect body size changes under future warming projections: a case study of Chironomidae (Insecta: Diptera)

et al. 2021

View full text Add to dashboard Cite

Chironomids are a useful group for investigating body size responses to warming due to their high local abundance and sensitivity to environmental change. We collected specimens of six species of chironomids every 2 weeks over a 2-year period (2017–2018) from mesocosm experiments using five ponds at ambient temperature and five ponds at 4°C higher than ambient temperature. We investigated (1) wing length responses to temperature within species and between sexes using a regression analysis, (2) interspecific body size responses to test whether the body size of species influences sensitivity to warming, and (3) the correlation between emergence date and wing length. We found a significantly shorter wing length with increasing temperature in both sexes of Procladius crassinervis and Tanytarsus nemorosus, in males of Polypedilum sordens, but no significant relationship in the other three species studied. The average body size of a species affects the magnitude of the temperature-size responses in both sexes, with larger species shrinking disproportionately more with increasing temperature. There was a significant decline in wing length with emergence date across most species studied (excluding Polypedilum nubeculosum and P. sordens), indicating that individuals emerging later in the season tend to be smaller.

show abstract

Section: Discussionmentioning

confidence: 99%

Insect body size changes under future warming projections: a case study of Chironomidae (Insecta: Diptera)

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The time of eclosion (emergence from pupal skin) of most chironomid species that have been studied in detail tends to be synchronized by photoperiod (Ineichen, Riesen‐Willi & Fischer, 1979; Neumann & Kruger, 1985) and food supply (Davies, 1980; Welch, Jorgenson & Curtis, 1988), but also, at least in part, by water temperature (Corbet, 1964; Danks, 1971 c ; Danks & Oliver, 1972 b ; Titmus, 1979; Kureck, 1979, 1980; Butler, 1980; Kon, 1984; Huryn, 1990; Lindegaard & Brodersen, 2000; Péry & Garric, 2006). Accordingly, modifications of natural temperatures in streams, rivers and lakes may alter emergence patterns (Coler & Kondratieff, 1989).…”

Section: Temperature Influence On Chironomid Physiology and Behamentioning

confidence: 99%

The chironomid‐temperature relationship: expression in nature and palaeoenvironmental implications

2011

View full text Add to dashboard Cite

Fossils of chironomid larvae (non-biting midges) preserved in lake sediments are well-established palaeotemperature indicators which, with the aid of numerical chironomid-based inference models (transfer functions), can provide quantitative estimates of past temperature change. This approach to temperature reconstruction relies on the strong relationship between air and lake surface water temperature and the distribution of individual chironomid taxa (species, species groups, genera) that has been observed in different climate regions (arctic, subarctic, temperate and tropical) in both the Northern and Southern hemisphere. A major complicating factor for the use of chironomids for palaeoclimate reconstruction which increases the uncertainty associated with chironomid-based temperature estimates is that the exact nature of the mechanism responsible for the strong relationship between temperature and chironomid assemblages in lakes remains uncertain. While a number of authors have provided state of the art overviews of fossil chironomid palaeoecology and the use of chironomids for temperature reconstruction, few have focused on examining the ecological basis for this approach. Here, we review the nature of the relationship between chironomids and temperature based on the available ecological evidence. After discussing many of the surveys describing the distribution of chironomid taxa in lake surface sediments in relation to temperature, we also examine evidence from laboratory and field studies exploring the effects of temperature on chironomid physiology, life cycles and behaviour. We show that, even though a direct influence of water temperature on chironomid development, growth and survival is well described, chironomid palaeoclimatology is presently faced with the paradoxical situation that the relationship between chironomid distribution and temperature seems strongest in relatively deep, thermally stratified lakes in temperate and subarctic regions in which the benthic chironomid fauna lives largely decoupled from the direct influence of air and surface water temperature. This finding suggests that indirect effects of temperature on physical and chemical characteristics of lakes play an important role in determining the distribution of lake-living chironomid larvae. However, we also demonstrate that no single indirect mechanism has been identified that can explain the strong relationship between chironomid distribution and temperature in all regions and datasets presently available. This observation contrasts with the previously published hypothesis that climatic effects on lake nutrient status and productivity may be largely responsible for the apparent correlation between chironomid assemblage distribution and temperature. We conclude our review by summarizing the implications of our findings for chironomid-based palaeoclimatology and by pointing towards further avenues of research necessary to improve our mechanistic understanding of the chironomid-temperature relationship.

show abstract

“…To precisely coordinate physiological processes, organisms unite molecular mechanisms operating on However, a robust hypothesis on the functional principle underlying each time-keeping system is an important first step toward understanding temporal organization in its entirety. The marine midge C. marinus has an experimentally verified circadian clock, as well as a circasemilunar clock and a photoperiodic diapause response (Neumann and Krüger, 1985), providing an opportunity to address the complex organization of time-keeping within the same organism.…”

Section: The Functional Principle Of Clunio's Circasemilunar Clock La...mentioning

confidence: 99%

The Free-Running Circasemilunar Period Is Determined by Counting Circadian Clock Cycles in the Marine Midge Clunio Marinus

Neumann,

Rajendra,

Kaiser

2024

J Biol Rhythms

View full text Add to dashboard Cite

Semilunar rhythms are found in numerous marine organisms, but the molecular mechanism and functional principles of endogenous circasemilunar clocks remain elusive. Here, we explore the connection between the free-running circasemilunar clock and the circadian clock in the marine midge Clunio marinus with three different chronobiological assays. First, we found that the free-running circasemilunar period of the adult emergence rhythm in C. marinus changes linearly with diel T-cycle length, supporting a day-counting mechanism. Second, under LD 6:6, periods of circasemilunar and circadian emergence were comparable to those under LD 12:12, indicating that the circasemilunar counter in C. marinus relies on endogenous circadian oscillations rather than external T-cycles. Finally, when desynchronizing the circadian clock with constant light, the free-running circasemilunar emergence rhythm disappeared as well, suggesting that it requires a synchronized circadian clock. These results oppose the long-held view that C. marinus’ free-running circasemilunar clock operates independently of the circadian clock. In a broader evolutionary context, our results strengthen the idea that the circasemilunar clocks of dipterous insects are based on different functional principles compared to the circasemilunar or circalunar clocks of marine annelids and algae. These divergent clock principles may indicate multiple evolutionary origins of circasemilunar and circalunar clocks.

show abstract

Combined effects of photoperiod and temperature on the diapause of an intertidal chironomid

Cited by 12 publications

References 14 publications

Insect body size changes under future warming projections: a case study of Chironomidae (Insecta: Diptera)

Insect body size changes under future warming projections: a case study of Chironomidae (Insecta: Diptera)

The chironomid‐temperature relationship: expression in nature and palaeoenvironmental implications

The Free-Running Circasemilunar Period Is Determined by Counting Circadian Clock Cycles in the Marine Midge Clunio Marinus

Contact Info

Product

Resources

About