Effects of intrinsic and extrinsic factors on reproduction of an ecologically significant invasive bryozoan: implications for invasion success

Denley, Danielle; Meta×as, Anna

doi:10.1007/s00227-017-3172-3

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…The sparser the ring of red algae surrounding this surface, the less likely the males are to successfully court passing females; thus, the males generally attempt to maintain the cover of red algae in high abundance while weeding out all other phytoplankton from the vicinity [67]. It is possible that the garibaldis' behavior might inhibit the spread of invasive species, such as lacy crust bryozoans (Membranipora membranacea L.) [68], just as grazing by other species of fish (e.g., the senorita, Oxyjulis californica Günther) and by nudibranchs (e.g., Polycera quadrilineata Müller and Onchidoris muricata Müller) has been shown to do in other locations [69,70]. Alternatively, the mutualistic interaction might enable the red algae themselves to become invasive or cause other problems, as similar mutualistic interactions are thought to have done in other systems [71].…”

Section: Indirect Overgrowthmentioning

confidence: 99%

Acquisition of Adaptive Traits via Interspecific Association: Ecological Consequences and Applications

Banerji

2021

Ecologies

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Adaptative traits enable organisms to survive and reproduce. Though these traits are often innate features (ones that may or may not exhibit variability in response to environmental cues or originate from horizontal gene transfer), this is not always the case. Many species endure natural selection not with the traits they possess intrinsically but with exogenous substances and abilities that they acquire from other species, via ecological interactions akin to outsourcing, pillaging, and fraud. Here, I review the mechanisms of this exogenous trait acquisition and highlight some of their repercussions and usefulness for natural resource management, industry, and human health.

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Section: Indirect Overgrowthmentioning

confidence: 99%

Acquisition of Adaptive Traits via Interspecific Association: Ecological Consequences and Applications

Banerji

2021

Ecologies

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“…Density‐dependent regulation of populations is a widespread phenomenon in natural systems, shaping the responses of populations to fluctuating or intensifying extrinsic pressures (Denley & Metaxas, 2017 ; Matte et al, 2020 ). Negative density dependence occurs when demographic rates such as productivity or survival increase at lower population density as a result of reduced competition for finite resources, such as breeding sites or food.…”

Section: Introductionmentioning

confidence: 99%

“…Higher quality habitat may be preferentially occupied to, for example, increase access to resources (Morris & MacEachern, 2010 ) or provide shelter from harsh environmental conditions (Rodenhouse et al, 1997 ). Heterogeneity in habitat quality may subsequently contribute to variation in demographic rates such as survival (Paradis, 1995 ) and productivity (Denley & Metaxas, 2017 ) among individuals. As population size increases, higher quality habitat becomes limited, forcing individuals to occupy habitat of lower quality (Gill et al, 2001 ; Kokko et al, 2004 ).…”

Section: Introductionmentioning

confidence: 99%

Site‐dependent regulation of breeding success: Evidence for the buffer effect in the common guillemot, a colonially breeding seabird

Bennett

Wanless

Harris

et al. 2022

Journal of Animal Ecology

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Density‐dependent regulation can offer resilience to wild populations experiencing fluctuations in environmental conditions because, at lower population sizes, the average quality of habitats or resources is predicted to increase. Site‐dependent regulation is a mechanism whereby individuals breed at the highest quality, most successful, sites, leaving poorer quality, less successful sites vacant. As population size increases, higher quality sites become limiting but when populations decline, lower quality sites are vacated first, offering resilience. This process is known as the ‘buffer effect’. However, few studies have tested whether such regulation operates in populations experiencing changes in size and trend. We used data from a population of common guillemots Uria aalge, a colonially breeding seabird, to investigate the relationship between site occupancy probability, site quality and population size and trend. These data were collected at five sub‐colonies spanning a 38‐year period (1981–2018) comprising phases of population increase, decrease and recovery. We first tested whether site quality and population size in sub‐colonies explained which sites were occupied for breeding, and if this was robust to changes in sub‐colony trend. We then investigated whether disproportionate use of higher quality sites drove average site quality and breeding success across sub‐colony sizes and trends. Finally, we tested whether individuals consistently occupied higher quality sites during periods of decline and recovery. Higher quality sites were disproportionality used when sub‐colony size was smaller, resulting in higher average site quality and breeding success at lower population sizes. This relationship was unaffected by changes in sub‐colony trend. However, contrary to the predictions of the buffer effect, new sites were established at a similar rate to historically occupied sites during sub‐colony decline and recovery despite being of lower quality. Our results provide support for the buffer effect conferring resilience to populations, such that average breeding success was consistently higher at lower population size during all phases of population change. However, this process was tempered by the continued establishment of new, lower quality, sites which could act to slow population recovery after periods when colony size was low.

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When does growth rate influence fitness in a colonial marine invertebrate?

Burgess

Bueno

2021

Mar Biol

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Effects of intrinsic and extrinsic factors on reproduction of an ecologically significant invasive bryozoan: implications for invasion success

Cited by 7 publications

References 40 publications

Acquisition of Adaptive Traits via Interspecific Association: Ecological Consequences and Applications

Acquisition of Adaptive Traits via Interspecific Association: Ecological Consequences and Applications

Site‐dependent regulation of breeding success: Evidence for the buffer effect in the common guillemot, a colonially breeding seabird

When does growth rate influence fitness in a colonial marine invertebrate?

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