Large-scale manipulation of mayfly recruitment affects population size

@article{Encalada2011LargescaleMO,
  title={Large-scale manipulation of mayfly recruitment affects population size},
  author={Andrea C. Encalada and Barbara L. Peckarsky},
  journal={Oecologia},
  year={2011},
  volume={168},
  pages={967-976}
}
Recruitment establishes the initial size of populations and may influence subsequent population dynamics. Although strong inference can be made from empirical relationships between recruitment and population sizes, a definitive test of recruitment limitation requires manipulating recruitment at relevant spatial and temporal scales. We manipulated oviposition of the mayfly Baetis bicaudatus in multiple streams and measured the abundance of late-stage larvae at the end of the cohort. Based on… 
Explaining Recruitment Stochasticity at a Species’ Range Margin
Advancing our understanding of how environmental variability affects the distribution of organisms is crucial for ecology and conservation. The exploration of changes in demographic patterns close to
Maternal behaviours may explain riffle‐scale variations in some stream insect populations
TLDR
Contrary to the prevailing view that riffle-to-riffle variations in the numbers of aquatic insect larvae can be explained by larval habitat, this study demonstrates a strong influence of adult behaviour, and oviposition site availability can explain significant amounts of this variation for some species.
Caddisfly egg mass morphology mediates egg predation: potential costs to individuals and populations
TLDR
The results demonstrate that egg mortality varies for aquatic insect species that package their eggs in different ways, and suggest egg mass morphology–mortality trade-offs, with bulbous egg massesparticularly vulnerable to flow forces (shear) and thinly jellied/jelly-free egg masses particularly vulnerable to predation.
Large-scale manipulation of oviposition substrata affects egg supply to populations of some stream-dwelling caddisflies
TLDR
A large-scale experiment manipulating the density of oviposition substrata available to two taxa, Cheumatopsyche spp.
Erratum to: Population regulation in a Neotropical seasonal wetland fish
TLDR
It is shown that population dynamics of Jewel tetra are influenced by the seasonal drought, which affects the various life stages of the cohort in different ways and causes changes in population size structure and extinction of local populations, which will affect recruitment in the following year.
Hydrological controls on oviposition habitat are associated with egg‐laying phenology of some caddisflies
TLDR
Geomorphological controls on availability of oviposition resources may have strong implications for the coexistence of species that overlap temporally in egg-laying, and regional hydrometeorology controlled the availability of ERs, but between-river differences were sufficient to deliver different outcomes in the availability.
Macroinvertebrate oviposition habitat selectivity and egg-mass desiccation tolerances: Implications for population dynamics in large regulated rivers
Aquatic insects exhibit complex life cycles that include egg, larval, adult, and, in some instances, pupal stages. Disturbances at any of these life stages can affect overall population dynamics.
A test of the preference–performance hypothesis with stream insects: selective oviposition affects the hatching success of caddisfly eggs
TLDR
Vulnerability to shear forces appears to explain why Apsilochorema lay eggs exclusively in slow flows, and selective oviposition affects the spatial distribution and survival of eggs and thus affects larval supply, and these supply dynamics are under-studied in stream ecology.
Population densities and density–area relationships in a community with advective dispersal and variable mosaics of resource patches
TLDR
It is demonstrated that patchy resources can affect species even in communities where species are mobile, have advective dispersal, and patches are relatively ephemeral, which is predicted to have only weak effects.
...
...

References

SHOWING 1-10 OF 60 REFERENCES
The influence of recruitment on within‐generation population dynamics of a mayfly
TLDR
It is concluded that recruitment can limit the population size of early larval stages of Baetis related to the availability of preferred oviposition sites for females; but post-recruitment processes eventually (in lower risk environments) or almost immediately swamp the effects of recruitment on population dynamics especially in fish streams.
VARIATION IN MAYFLY SIZE AT METAMORPHOSIS AS A DEVELOPMENTAL RESPONSE TO RISK OF PREDATION
TLDR
It is proposed that large-scale patterns of variation in size and timing of metamorphosis represent adaptive phenotypic plasticity, whereby mayflies respond to variation in risk of predation, thereby maximizing their fitness in variable environments.
Dispersal and Recruitment in Streams: Evidence from Genetic Studies
  • S. Bunn, J. Hughes
  • Environmental Science, Biology
    Journal of the North American Benthological Society
  • 1997
TLDR
It is proposed that dispersal capability and the stochastic effects of recruitment are key determinants of observed spatial and temporal variation in community structure in some streams.
Strong density dependence in a predatory insect: large‐scale experiments in a stream
TLDR
It is intriguing that this abundant predator, which is linked very richly within the complex Broadstone Stream food web, has a strongly stabilized population, even in the face of such a dramatic perturbation in recruitment.
Hydrologic and behavioral constraints on oviposition of stream insects: implications for adult dispersal
TLDR
Oviposition and emergence of a bivoltine population of B. bicaudatus in multiple stream reaches in one high-altitude watershed in western Colorado over 3 years was surveyed to determine whether hydrologic variation necessitated dispersal of females to find suitable oviposition sites and whether the local supply of females could provide the supply of local recruits, and whether local recruitment determined the local production of adults.
Recruitment Limitation, Mortality, and Population Regulation in Open Systems: A Case Study
TLDR
Modelling based on the measured demography of C. pumicosa demonstrates that the observed levels of recruitment and mortality will limit the population size to very low levels, although relatively small increases in numbers of recruits would yield a substantially large population.
PREDATOR CHEMICALS INDUCE CHANGES IN MAYFLY LIFE HISTORY TRAITS: A WHOLE-STREAM MANIPULATION
TLDR
The results demonstrate the strength of this predator-prey interaction and indicate that brook trout are an important agent of natural selection on mayfly life history traits.
Strong density-dependent survival and recruitment regulate the abundance of a coral reef fish
TLDR
This study has documented a previously unrecorded regulatory mechanism for reef fish populations (density-dependent adult mortality) and provided a particularly strong example of a well-established mechanism ( density-dependent recruitment), which have the potential to strongly regulate the abundance of this species and rule out the control of abundance by the supply of recruits.
Selective oviposition of the mayfly Baetis bicaudatus
TLDR
The authors' data suggest that even when protruding rocks are abundant, not all rocks are used as oviposition sites by females, due to female selectivity and to differences in rock availability within seasons, years, or streams depending on variation in climate and hydrogeomorphology.
The influence of predatory fish on mayfly drift: extrapolating from experiments to nature
TLDR
Results indicate that mayflies respond to subtle differences in concentration of fish cues in experimental channels, but temporal and spatial variation in fish cues available to mayflies in natural streams may have obscured ability to detect responses at larger scales.
...
...