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Oecologia
2022 Aug 01;1994:859-869. doi: 10.1007/s00442-022-05225-5.
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Conspecific cues, not starvation, mediate barren urchin response to predation risk.
Knight CJ
,
Dunn RP
,
Long JD
.
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Prey state and prey density mediate antipredator responses that can shift community structure and alter ecosystem processes. For example, well-nourished prey at low densities (i.e., prey with higher per capita predation risk) should respond strongly to predators. Although prey state and density often co-vary across habitats, it is unclear if prey responses to predator cues are habitat-specific. We used mesocosms to compare the habitat-specific responses of purple sea urchins (Strongylocentrotus purpuratus) to waterborne cues from predatory lobsters (Panulirus interruptus). We predicted that urchins from kelp forests (i.e., in well-nourished condition) tested at low densities typically observed in this habitat would respond more strongly to predation risk than barren urchins (i.e., in less nourished condition) tested at high densities typically observed in this habitat. Indeed, when tested at densities associated with respective habitats, urchins from forests, but not barrens, reduced kelp grazing by 69% when exposed to lobster risk cues. Barren urchins that were unresponsive to predator cues at natural, high densities suddenly responded strongly to lobster cues when conspecific densities were reduced. Strong responses of low densities of barren urchins persisted across feeding history (i.e. 0-64 days of starvation). This suggests that barren urchins can respond to predators but typically do not because of high conspecific densities. Because high densities of urchins in barrens should weaken the non-consumptive effects of lobsters, urchins in these habitats may continue to graze in the presence of predators thereby providing a feedback that maintains urchin barrens.
Burke,
A genomic view of the sea urchin nervous system.
2006, Pubmed,
Echinobase
Burke,
A genomic view of the sea urchin nervous system.
2006,
Pubmed
,
Echinobase
Danner,
Resource-mediated impact of spider predation risk on performance in the grasshopper Ageneotettix deorum (Orthoptera: Acrididae).
2003,
Pubmed
Dunn,
Experiments reveal limited top-down control of key herbivores in southern California kelp forests.
2019,
Pubmed
,
Echinobase
Eisaguirre,
Trophic redundancy and predator size class structure drive differences in kelp forest ecosystem dynamics.
2020,
Pubmed
,
Echinobase
Fernando,
Therapeutic IGF-I receptor inhibition alters fibrocyte immune phenotype in thyroid-associated ophthalmopathy.
2021,
Pubmed
Hamilton,
Exploitation and recovery of a sea urchin predator has implications for the resilience of southern California kelp forests.
2015,
Pubmed
,
Echinobase
Heithaus,
State-dependent risk-taking by green sea turtles mediates top-down effects of tiger shark intimidation in a marine ecosystem.
2007,
Pubmed
Kimbro,
Nonconsumptive effects of a predator weaken then rebound over time.
2017,
Pubmed
Krumhansl,
Global patterns of kelp forest change over the past half-century.
2016,
Pubmed
Ling,
Density-dependent feedbacks, hysteresis, and demography of overgrazing sea urchins.
2019,
Pubmed
,
Echinobase
Matassa,
Landscape of fear influences the relative importance of consumptive and nonconsumptive predator effects.
2011,
Pubmed
McCoy,
Conspecific density determines the magnitude and character of predator-induced phenotype.
2007,
Pubmed
Miller,
Quorum sensing in bacteria.
2001,
Pubmed
Ovadia,
Linking individuals with ecosystems: experimentally identifying the relevant organizational scale for predicting trophic abundances.
2002,
Pubmed
Peterson,
Analysis of feeding preference experiments.
1989,
Pubmed
,
Echinobase
Rogers-Bennett,
Marine heat wave and multiple stressors tip bull kelp forest to sea urchin barrens.
2019,
Pubmed
,
Echinobase
Selden,
Protection of large predators in a marine reserve alters size-dependent prey mortality.
2017,
Pubmed
,
Echinobase
Stevenson,
Accounting for size-specific predation improves our ability to predict the strength of a trophic cascade.
2016,
Pubmed
,
Echinobase
Strong,
Habitat-specific effects of food abundance on the condition of ovenbirds wintering in Jamaica.
2000,
Pubmed