Risky Business: Predator Chemical Cues Mediate Morphological Changes in Freshwater Snails DOI Creative Commons
Madison J. Wagner,

Phillip A. Moore

Integrative Organismal Biology, Journal Year: 2024, Volume and Issue: 6(1)

Published: Jan. 1, 2024

Synopsis Many prey organisms respond to the nonconsumptive effects of predators by altering their physiology, morphology, and behavior. These inducible defenses can create refuges for decreasing likelihood consumption predators. Some prey, as in marine mollusks, have been shown alter morphology response presence size-limited predation. To extend this work, we exposed pointed campeloma snails (Campeloma decisum) chemical cues from a natural predator, rusty crayfish (Faxonius rusticus), better understand how snail changes under threat The total force needed crush shells, shell length, aperture width, weight, along with these 3 body measurements, were recorded each individual used quantify morphological function risk. Snails had shells that required significantly more than controls (P = 0.023). Total length was greater crayfish-exposed control 0.012), treatment also showed change 0.007). Similarly, width 0.011). However, exhibited less 0.03). Finally, found weighed 0.008). Thus, results study show gastropods is altered predators, may be an antipredator tactic directly related predation

Language: Английский

A global synthesis of predation on bivalves DOI
Alexandra Meira, James E. Byers, Ronaldo Sousa

et al.

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2024, Volume and Issue: 99(3), P. 1015 - 1057

Published: Jan. 31, 2024

ABSTRACT Predation is a dominant structuring force in ecological communities. In aquatic environments, predation on bivalves has long been an important focal interaction for study because have central roles as ecosystem engineers, basal components of food webs, and commercial commodities. Studies are common, not only bivalves' roles, but also due to the relative ease studying predatory effects this taxonomic group. To understand patterns interactions their predators we synthesised data from 52 years peer‐reviewed studies bivalve predation. Using systematic search, compiled 1334 75 countries, comprising 61 families ( N = 2259), dominated by Mytilidae (29% bivalves), Veneridae (14%), Ostreidae (8%), Unionidae (7%), Dreissenidae Tellinidae (6% each). A total 2036 were studied, with crustaceans most studied predator group (34% predators), followed fishes (24%), molluscs (17%), echinoderms (10%) birds (6%). The majority (86%) conducted marine systems, part driven high value bivalves. freshwater ecosystems non‐native species, which probably reflects role biological invasions affecting biodiversity. fact, while 81% species native, 50% native system. terms approach, used trials, visual analysis digested contents exclusion experiments assess These reflect that many factors influence depending including i ) traits (e.g. behaviour, morphology, defence mechanisms), ii other biotic presence competitors, parasites or diseases), iii environmental context temperature, current velocity, beach exposure, habitat complexity). There lack research at population community levels (only 7% 0.5% respectively examined impacts these levels). At level, available demonstrate can decrease density through consumption reduction recruitment. trigger cascade trophic alter functions perform. Given conservation importance should be pursued global change, particularly climate acidification invasions.

Language: Английский

Citations

15
eDNA confirms lower trophic interactions help to modulate population outbreaks of the notorious crown-of-thorns sea star DOI Creative Commons
Kennedy Wolfe, Amelia A. Desbiens, Frances Patel

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2025, Volume and Issue: 122(11)

Published: March 10, 2025

Variability in predator–prey interactions can modulate population dynamics with impacts scalable to entire ecosystems. As notorious corallivores, crown-of-thorns sea stars (CoTS; Acanthaster spp.) have caused extensive losses of coral habitat during unexplained outbreaks across the Indo-Pacific. While predation adult CoTS may help suppress their outbreaks, it does not sufficiently explain profound boom-bust and so remains equivocal. Factors influencing early postsettlement mortality are generally more impactful on size, thus lower trophic involving juvenile better contribute outbreak prevention. We evaluated impact key predatory decapods that interact rubble nursery before they emerge as destructive corallivores. Decapod density was influenced by complexity varied regionally, inverse spatial trends Great Barrier Reef. Using eDNA gut content analysis, we confirmed seven species (~12% individuals) wild-caught decapod, collected from two reefs separated >1,000 km, predators. Owing variation predator abundance community structure, estimated potential (previous aquarium experiments) realized (eDNA results here) rates consumption were ~3-fold ~1.6-fold lower, respectively, hotspots. Through combination field molecular techniques, demonstrated appreciable cryptic predators success this nuisance species, which expands our knowledge pest management, reef conservation. Resolving at levels ecosystem be crucial understanding broader ecological outcomes.

Language: Английский

Citations

0
Changes in induced-antipredation defense traits and transcriptome regulation of rotifer Brachionus calyciflorus in response to nanoplastics DOI
Huanhuan Xu,

Xiaodan Nan,

Yingying Ge

et al.

Journal of Oceanology and Limnology, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

Language: Английский

Citations

0
Common fear molecules induce defensive responses in marine prey across trophic levels DOI

Sarah H. Roney,

Marisa R. Cepeda, Benjamin A. Belgrad

et al.

Oecologia, Journal Year: 2023, Volume and Issue: 202(4), P. 655 - 667

Published: Aug. 1, 2023

Language: Английский

Citations

6
Network-based food availability affects the keystoneness of predators and functional diversity of marine food web DOI
Yancong Xu, Ferenc Jordán

Marine Ecology Progress Series, Journal Year: 2024, Volume and Issue: 747, P. 1 - 18

Published: Aug. 15, 2024

Marine predators play an important role in food webs, and their availability affects the structure function of marine ecosystems. In this research, we calculated 6 network-level topological indices keystone index for predator nodes. We also quantified functional homogenization degree web by using a measure diversity. simulated variation adding or deleting link to each node recalculating above indicators turn when generating new network. found that increased can increase complexity yet top show less plasticity network than lower predators. The resulting variability average path length may be related threshold at which omnivory stability. When ranges from 0.3 0.6, higher trophic levels have positive impact on stability web, as interplay between bottom-up top-down mechanisms. addition, high lead homogenization, particularly with levels. For predators, reduced is more conducive resilience Finally, increasing increases relative positional importance nodes Especially amplifies effects web. This research reveals mechanistic basis webs contributes theoretical effective management

Language: Английский

Citations

0
Risky Business: Predator Chemical Cues Mediate Morphological Changes in Freshwater Snails DOI Creative Commons
Madison J. Wagner,

Phillip A. Moore

Integrative Organismal Biology, Journal Year: 2024, Volume and Issue: 6(1)

Published: Jan. 1, 2024

Synopsis Many prey organisms respond to the nonconsumptive effects of predators by altering their physiology, morphology, and behavior. These inducible defenses can create refuges for decreasing likelihood consumption predators. Some prey, as in marine mollusks, have been shown alter morphology response presence size-limited predation. To extend this work, we exposed pointed campeloma snails (Campeloma decisum) chemical cues from a natural predator, rusty crayfish (Faxonius rusticus), better understand how snail changes under threat The total force needed crush shells, shell length, aperture width, weight, along with these 3 body measurements, were recorded each individual used quantify morphological function risk. Snails had shells that required significantly more than controls (P = 0.023). Total length was greater crayfish-exposed control 0.012), treatment also showed change 0.007). Similarly, width 0.011). However, exhibited less 0.03). Finally, found weighed 0.008). Thus, results study show gastropods is altered predators, may be an antipredator tactic directly related predation

Language: Английский

Citations

0