Environmental constraints on oviposition limit egg supply of a stream insect at multiple scales

Lancaster, Jill; Downes, Barbara J.; Arnold, Amanda

doi:10.1007/s00442-010-1565-9

Cited by 47 publications

(78 citation statements)

References 63 publications

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“…Our findings are consistent with ''habitat constraints'' to recruitment, instead of ''supply determination'' (sensu Schmitt and Holbrook 2000) of adult female supplies at least in fishless streams, which translated to recruitment limitation of population sizes of first stage larvae. Similar cases of recruitment limitation by environmental or habitat constraints have been observed in other aquatic insects (Fincke 1994, Fonseca and Hart 2001, Spencer et al 2002, Lancaster et al 2010, and more commonly in marine fishes and terrestrial organisms (Price et al 1998, Connell andGreen 2000). A model presented by Lancaster et al (2010) suggested that mayfly egg supply (recruitment limitation) caused by environmental constrains (emergent rocks) is scale-dependent.…”

Section: Discussionmentioning

confidence: 56%

“…Similar cases of recruitment limitation by environmental or habitat constraints have been observed in other aquatic insects (Fincke 1994, Fonseca and Hart 2001, Spencer et al 2002, Lancaster et al 2010, and more commonly in marine fishes and terrestrial organisms (Price et al 1998, Connell andGreen 2000). A model presented by Lancaster et al (2010) suggested that mayfly egg supply (recruitment limitation) caused by environmental constrains (emergent rocks) is scale-dependent. Future studies comparing outcomes at different spatial scales would be fruitful for testing that hypothesis; and new empirical scaling applications might be useful for unraveling the population level effects of recruitment (Lancaster et al 2010) and post-recruitment processes (Englund and Leonardsson 2008) acting at different scales.…”

Section: Discussionmentioning

confidence: 56%

“…A model presented by Lancaster et al (2010) suggested that mayfly egg supply (recruitment limitation) caused by environmental constrains (emergent rocks) is scale-dependent. Future studies comparing outcomes at different spatial scales would be fruitful for testing that hypothesis; and new empirical scaling applications might be useful for unraveling the population level effects of recruitment (Lancaster et al 2010) and post-recruitment processes (Englund and Leonardsson 2008) acting at different scales.…”

Section: Discussionmentioning

confidence: 99%

“…Hence, potential coupling between local egg production and densities of offspring might be masked or overridden by larval mortality and movement (but see Cowen et al 2000) that might occur at different spatial (Lancaster et al 2010) and temporal scales (Hildrew et al 2004). Interestingly, in populations of marine invertebrates, many studies have reported patterns of variability in abundance consistent with recruitment limitation (Connell 1985, Sutherland 1990); while others conclude that post-recruitment processes are more important to population dynamics (Underwood and Fairweather 1989).…”

Section: Introductionmentioning

confidence: 99%

“…In spite of many parallels between the complexity of the life cycles of stream insects and marine invertebrates (Elliott et al 1988, Palmer et al 1996, Downes and Keough 1998, there have been very few studies addressing the supply of new recruits to streams (Bunn and Hughes 1997, Peckarsky et al 2000, Encalada and Peckarsky 2006 and their relationship with subsequent patterns of larval abundance (but see Hildrew et al 2004, Reich and Downes 2004, Lancaster et al 2010. Most studies of stream invertebrate populations have focused on the effects of postrecruitment processes, such as biotic interactions (competition, predation) (Kohler 1984, Kerans et al 1995, environmental disturbance Feifarek 1994, Lytle 2000) and fluid mediated movement (Forrester 1994, Fonseca and Hart 1996.…”

Section: Introductionmentioning

confidence: 99%

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The influence of recruitment on within-generation population dynamics of a mayfly

Encalada

Peckarsky

2011

Ecosphere

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Abstract. The relative contributions of recruitment and post-recruitment processes are pivotal to understanding the mechanisms influencing the population dynamics of organisms. We estimated recruitment by oviposition to populations of the mayfly Baetis bicaudatus in multiple streams of one drainage basin in western Colorado, USA, and subsequent changes in larval population densities of one cohort over one generation. Our goal was to compare the potential for recruitment limitation and postrecruitment processes to explain variation in population dynamics of one cohort in streams with predatory fish (brook trout) and fishless streams. We censused Baetis egg masses oviposited in 14 streams during summer 2001, and estimated larval densities of this cohort during September 2001, April and June 2002. There was substantial variability among streams in densities of eggs and subsequent larval densities, with qualitatively different larval dynamics in fish and fishless streams. In fishless streams egg densities were generally lower than in fish streams due to hydrogeomorphic habitat constraints; and increasing egg densities resulted in higher densities of early stage larvae. This pattern was consistent with recruitment limitation of population size of early stages, which persisted until April. In contrast, increasing egg densities in trout streams resulted in lower densities of early stage larvae, consistent with strong densitydependent losses due to post-recruitment processes. In both fish and fishless streams the loss rates of early stage larvae during winter were density-independent; but from April to June the pattern suggests strong density-dependent losses of larvae in fish streams, and weaker, although significant density-dependent losses in fishless streams as larvae developed to late instars from April to June. We conclude 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. This study illustrates that the relative influences of recruitment limitation and postrecruitment processes on mayfly population dynamics varies across life stages and among environments with different habitat constraints and predation risks.

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The influence of recruitment on within-generation population dynamics of a mayfly

Encalada

Peckarsky

2011

Ecosphere

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Facilitating the recovery of insect communities in restored streams by increasing oviposition habitat

Dilworth,

Taylor

2023

Ecological Applications

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Recruitment limitation is known to influence species abundances and distributions. Recognition of how and why it occurs both in natural and in designed environments could improve restoration. Aquatic insects, for instance, rarely reestablish in restored streams to levels comparable to reference streams even years after restoration. We experimentally increased oviposition habitat in five out of 10 restored streams in western North Carolina to test whether insect egg‐laying habitat was limiting insect populations in restored streams. A main goal was to test whether adding oviposition habitat in the form of rocks that partially protrude above the water surface could be used to increase the abundance and richness of stream insect eggs and larval insects in restored streams. Adding egg‐laying habitat enhanced several response variables (e.g., protruding rocks, number of eggs, egg masses, egg morphotype richness, and oviposition habitat stability) to levels similar to those found in reference streams. Following the addition of protruding rocks, egg mass abundance increased by 186% and richness by 77% in restored‐treated streams. Densities of larval insects that attached their eggs to protruding rocks showed an overall pattern consistent with treatment effects due to the combination of nonsignificant and significant increases of several taxa and not just one taxon. Our results indicate that these stream insect populations are limited by oviposition habitat and that adding egg‐laying habitat alleviated this component of recruitment limitation. However, the weaker larval response indicates that additional post‐recruitment factors, such as egg or larval mortality, may still be limiting a full recovery of larval insect abundances in these restored streams. This study shows the importance of integrating information from animal life histories, ecology, and geomorphology into restoration practices to improve the recovery of aquatic insects, which are commonly used to assess water quality and the biological efficacy of stream restoration.

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Fine‐scale selection by ovipositing females increases egg survival

Gall

Brodie

2012

Ecology and Evolution

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One of the most important defenses for the eggs of ovipositing female organisms is to avoid being laid in the same habitat as their predators. However, for most organisms, completely avoiding an offspring's predators is not possible. One mechanism that has been largely overlooked is for females to partition an oviposition site into microhabitats that differ in quality for offspring survival. We conducted a series of experiments to examine whether female newts avoid microhabitats utilized by their offspring's primary predator, caddisfly larvae. Female newts avoided laying eggs near predatory caddisflies and shifted egg laying upward in the water column when provided with a vertical dimension. Caddisflies were attracted to chemical stimuli from female newts and their eggs, yet primarily used benthic areas in experimental chambers. Finally, results from a field experiment indicate that the behavioral strategy employed by female newts increases offspring survival. This subset of non-genetic maternal effects, micro-oviposition avoidance, is likely an important yet underexplored mechanism by which females increase offspring survival.

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Environmental constraints on oviposition limit egg supply of a stream insect at multiple scales

Cited by 47 publications

References 63 publications

The influence of recruitment on within-generation population dynamics of a mayfly

The influence of recruitment on within-generation population dynamics of a mayfly

Facilitating the recovery of insect communities in restored streams by increasing oviposition habitat

Fine‐scale selection by ovipositing females increases egg survival

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