Planktonic predation risk: effects of diel state, season and prey life history stage

Kerr, Kecia A.; Cornejo, Anabell J.; Guichard, Frédéric; Crespi-Abril, Augusto César; Collin, Rachel

doi:10.1093/plankt/fbv006

Cited by 3 publications

(1 citation statement)

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“…For example, Diplodus vulgaris, Oblada melanura, and Spicara maena are preys of Dentex (Morales-Nin and Moranta, 1997) with diurnal increases in presence and activity that are sustained also at twilight conditions (Santos et al, 2002;La Mesa et al, 2013;Witkowski et al, 2016). Predators and preys seek for temporal overlapping (predators) or avoidance (preys) of their activity phases over the 24-h cycle (e.g., Kronfeld-Schor and Dayan, 2003;McCauley et al, 2012;Kerr et al, 2015;Andersen et al, 2017;Olivares et al, 2020;Priou et al, 2021).…”

Section: How To Interpret Day-night Rhythms In Dentex Visual Countsmentioning

confidence: 99%

Long-Term Monitoring of Diel and Seasonal Rhythm of Dentex dentex at an Artificial Reef

et al. 2022

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Behavioral rhythms are a key aspect of species fitness, since optimize ecological activities of animals in response to a constantly changing environment. Cabled observatories enable researchers to collect long-term biological and environmental data in real-time, providing relevant information on coastal fishes’ ecological niches and their temporal regulation (i.e., phenology). In this framework, the platform OBSEA (an EMSO Testing-Site in the NW coastal Mediterranean) was used to monitor the 24-h and seasonal occurrence of an ecologically iconic (i.e., top-predator) coastal fish species, the common dentex (Dentex dentex). By coupling image acquisition with oceanographic and meteorological data collection at a high-frequency (30 min), we compiled 8-years’ time-series of fish counts, showing daytime peaks by waveform analysis. Peaks of occurrence followed the photophase limits as an indication of photoperiodic regulation of behavior. At the same time, we evidenced a seasonal trend of counts variations under the form of significant major and minor increases in August and May, respectively. A progressive multiannual trend of counts increase was also evidenced in agreement with the NW Mediterranean expansion of the species. In GLM and GAM modeling, counts not only showed significant correlation with solar irradiance but also with water temperature and wind speed, providing hints on the species reaction to projected climate change scenarios. Grouping behavior was reported mostly at daytime. Results were discussed assuming a possible link between count patterns and behavioral activity, which may influence video observations at different temporal scales.

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Section: How To Interpret Day-night Rhythms In Dentex Visual Countsmentioning

confidence: 99%

Long-Term Monitoring of Diel and Seasonal Rhythm of Dentex dentex at an Artificial Reef

et al. 2022

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From microscope to management: The critical value of plankton taxonomy to marine policy and biodiversity conservation

et al. 2017

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Taxonomic information provides a crucial understanding of the most basic component of 22 biodiversity-which organisms are present in a region or ecosystem. Taxonomy, however, is a 23 discipline in decline, at times perceived as 'obsolete' due to technical advances in science, and with 24 fewer trained taxonomists and analysts emerging each year to replace the previous generation as it 25 retires. Simultaneously, increasing focus is turned towards sustainable management of the marine 26 environment using an ecosystem approach, and towards conserving biodiversity, key species, and 27 habitats. Sensitive indicators derived from taxonomic data are instrumental to the successful 28 delivery of these efforts. At the base of the marine food web and closely linked to their immediate 29 environment, plankton are increasingly needed as indicators to support marine policy, inform 30 conservation efforts for higher trophic organisms, and protect human health. Detailed taxonomic 31 data, containing information on the presence/absence and abundance of individual plankton 32 species, are required to underpin the development of sensitive species-and community-level 33 indicators which are necessary to understand subtle changes in marine ecosystems and inform 34 management and conservation efforts. Here the critical importance of plankton taxonomic data is 35 illustrated, and therefore plankton taxonomic expertise, in informing marine policy and conservation 36 and outline challenges, and potential solutions, facing this discipline. 37

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Networks of marine protected areas under fluctuating connectivity: The importance of within-MPA dynamics

Bani

Peller

Marleau

et al. 2020

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The design of marine protected areas (MPAs) has been optimized under assumptions of spatially and temporally homogeneous larval dispersal, despite complex spatiotemporal patterns displayed by ocean currents. Here we studied the effect of dispersal variability on the effectiveness of MPA networks across scales. We adopted a nested approach integrating the dynamics of both within and among MPA connectivity into a stochastic metapopulation model and first derived metapopulation persistence (required reproductive effort) and stability over MPA networks by partitioning within and among MPA contributions in relation to the spatial resolution of within-MPA connectivity. We applied this framework over a range of dispersal traits (spawning time and pelagic larval duration) and MPA network configurations, based on simulated biophysical connectivity along the northeast Pacific coast. Our results show how within-MPA dynamics affect predictions based on parameters of MPA networks such as MPA size, spacing, and pelagic larval duration. Increasing within-MPA spatial resolution predicted increasing population persistence and stability independently of other network properties. High-resolution within-MPA dynamics also predicted a negative relationship between species persistence and MPA spacing while that relationship was non-monotonic under low-resolution within-MPA dynamics. Our analysis also resolved the role of pelagic larval duration for scaling up within-MPA dynamics to MPA networks: species with short larval duration led to increasing network stability with MPA spacing while the opposite was observed for species with long larval duration. Our study stresses the importance of integrating fluctuating larval connectivity, both within and among MPAs, and more specifically suggest the benefit of small and nearby MPAs under increasing ocean variability.

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Planktonic predation risk: effects of diel state, season and prey life history stage

Cited by 3 publications

References 58 publications

Long-Term Monitoring of Diel and Seasonal Rhythm of Dentex dentex at an Artificial Reef

Long-Term Monitoring of Diel and Seasonal Rhythm of Dentex dentex at an Artificial Reef

From microscope to management: The critical value of plankton taxonomy to marine policy and biodiversity conservation

Networks of marine protected areas under fluctuating connectivity: The importance of within-MPA dynamics

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