Ontogeny drives allochthonous trophic support of snappers: Seascape connectivity along the mangrove-seagrass-coral reef continuum of a tropical marine protected area

Bastos, Rodrigo Ferreira; Lippi, Daniel Lino; Gaspar, Ana Lídia Bertoldi; Yogui, Gilvan Takeshi; Frédou, Thierry; Garcia, Alexandre; Ferreira, Beatrice Padovani

doi:10.1016/j.ecss.2021.107591

Cited by 17 publications

(7 citation statements)

References 77 publications

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“…Second, these data agreed with stable isotope signatures, where juvenile stable isotopes were collectively δ 13 C‐enriched and δ 15 N‐depleted relative to subadults, likely reflecting their greater consumption of lower trophic level prey. Although subadults are not necessarily at a higher relative trophic position, this suggests they assimilated a greater diversity of prey than juveniles by foraging across a broader habitat mosaic (Flaherty et al 2014; Bastos et al 2022). Dietary composition of recruits was not examined here, but it is likely dominated by mysid shrimp found in similar sized sportfish in this system (Loch & Cook 2023).…”

Section: Discussionmentioning

confidence: 99%

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Evidence of ontogenetic partitioning of restored coastal habitat by a generalist sportfish

Loch

Cook

2023

Restoration Ecology

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Coastal and estuarine habitats that provide crucial nursery areas for many economically and ecologically important fish species are in decline. Restoration of benthic habitats can improve fish populations, biomass, and feeding opportunities, but there is limited research on how restoration impacts growth and survival with ontogeny. To address this knowledge gap, here we examine the biometrics (size, biomass, and body condition), recruitment, size structure, and trophic shifts of a sportfish (mangrove snapper, Lutjanus griseus) at restored oyster reefs and stabilized living shorelines to better understand how fish use restored habitats as they grow. Biomass and body condition of L. griseus juveniles and subadults, and post‐settlement recruitment, at restored/stabilized sites was similar, and in some cases greater than natural sites, correlating with benthic habitat, reef location, and lunar phase at oyster reefs. Living shorelines exhibited greater recruitment potential, while oyster reefs supported more juveniles and subadults, as evidenced by differences in fish size and biomass between habitats. Dietary overlap implies subadult L. griseus likely foraged across habitats more than juveniles, while there was greater diet similarity within habitats. Furthermore, ontogenetic shifts also occurred within oyster reef habitats, highlighting the importance of quality habitat to support various sportfish life stages, which can be achieved through restoration. These findings suggest life history attributes can be indicators of habitat restoration success, and specifically provide actionable science to guide the development of more effective strategies for restoring inshore nursery habitats and thus augment production of offshore reef fisheries.

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Section: Discussionmentioning

confidence: 99%

“…Mangrove snapper L. griseus have ontogenetic diet shifts across different estuarine habitats, but less is known about how this relates to habitat quality and restoration (Yeager & Layman 2011; Bastos et al 2022). The results here address this by detecting demonstrable size class differences when viewed across habitats and site types.…”

Section: Discussionmentioning

confidence: 99%

Evidence of ontogenetic partitioning of restored coastal habitat by a generalist sportfish

Loch

Cook

2023

Restoration Ecology

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“…Flood waves can influence ecosystem processes, affecting within-channel productivity, particulate organic matter retention, decomposition, nutrient transformations, and microbial processes [75]. It can also influence surface water and groundwater quality and recharge [76]; flood waves may also cause 'sand slugs,' alter channel morphology, scour substrata, remove in situ basal resources, such as macrophytes, detritus, and translocate, injure or kill biota, and affect the relative importance of autochthonous and allochthonous carbon sources [77]. In general, floods also alter water quality [78] and facilitate the spread of non-native and invasive species [79].…”

Section: Discussionmentioning

confidence: 99%

Modeling and Risk Analysis of Dam-Break Flooding in a Semi-Arid Montane Watershed: A Case Study of the Yabous Dam, Northeastern Algeria

Gaagai

Aouissi

Krauklis

et al. 2022

Water

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The risk related to embankment dam breaches needs to be evaluated in order to prepare emergency action plans. The physical and hydrodynamic parameters of the flood wave generated from the dam failure event correspond to various breach parameters, such as width, slope, and formation time. This study aimed to simulate the dam breach failure scenario of the Yabous dam (northeast Algeria) and analyze its influence on the related areas (urban and natural environments) downstream of the dam. The simulation was completed using the sensitivity analysis method to assess the impact of breach parameters and flooding on the dam break scenario. The flood wave propagation associated with the dam break was simulated using the one-dimensional HEC-RAS hydraulic model. This study applied a sensitivity analysis of three breach parameters (slope, width, and formation time) on five sites selected downstream of the embankment dam. The simulation showed that the maximum flow of the flood wave recorded at the level of the breach was 8768 m3/s, which gradually attenuated along the river course to reach 1972.7 m3/s at about 8.5 km downstream the dam. This study established the map of flood risk areas that illustrated zones threatened by the flooding wave triggered by the dam failure due to extreme rainfall events. The sensitivity analysis showed that flood wave flow, height, and width revealed positive and similar changes for the increases in adjustments (±25% and ±50%) of breach width and slope in the five sites. However, flood wave parameters of breach formation time showed significant trends that changed in the opposite direction compared to breach slope and width. Meanwhile, the adjustments (±25% and ±50%) of the flood hydrograph did not significantly influence the flood parameters downstream of the dam. In the present study, the HEC-RAS 1-D modeling demonstrated effectiveness in simulating the propagation of flood waves downstream of the dam in the event of dam failure and highlighted the impact of the breach parameters and the flood hydrographical pattern on flood wave parameters.

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“…This result was consistent with those of previous studies on mangroves as fish shelters, feeding grounds, and spawning grounds, and it further confirmed the importance of connectivity of mangroves with coral reefs [ 108 , 109 , 110 ]. Connectivity of mangrove and coral reef ecosystems has been demonstrated in studies in Europe [ 111 ], East Asia [ 54 ], Southeast Asia [ 112 ], and the Southwest Atlantic [ 113 ]. Studies in Caribbean waters found that the biomass of several species in coral reefs linked to mangroves has more than doubled [ 114 ].…”

Section: Discussionmentioning

confidence: 99%

Distribution Pattern of Mangrove Fish Communities in China

Zhao

Wang

et al. 2022

Biology

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Mangroves are among the most productive marine and coastal ecosystems and play an important role in maintaining the stability and diversity of fish communities. To explore the structure of mangrove fish communities in China, we compiled previous studies, monographs, and two databases on 54 mangrove areas published in the past 30 years. Mangrove fish communities in China comprised Osteichthys (597 species) and Chondrichthyes (14 species), representing 611 species in 344 genera, 117 families, and 28 orders. Perciformes were the predominant taxon, with 350 species in 52 families, accounting for 57% of the total species richness. Reef fish accounted for 29.62%. With regard to feeding groups, there were 328 carnivorous species (53.68%), 214 omnivorous species (35.02%), 41 herbivorous species (6.71%), and 28 detritivores species (4.58%). Classified by body size, 57.61% were small-sized, 24.22% medium-sized, and 18.17% were large-sized fishes. A total of 5.23% (32 species) of these mangrove fish are currently on IUCN red lists, i.e., 2 species are critically endangered, 4 are endangered, 12 are vulnerable, and 14 are near threatened. Cluster analyses shows that Chinese mangroves fish were divided into two categories, i.e., coastal mangrove and island mangrove type. This is closely related to the distribution of reef fish. Moreover, the number of fish species showed a strong positive correlation with mangrove area, but not with latitude. The main reasons may be the subtropical and tropical geographic locations, as well as the characteristics of the South China Sea and the Taiwan Warm Current. The size and integrity of mangrove area are crucial to the local ecosystems; thus, protecting and restoring mangroves is of great significance to large-scale ecosystem-stability and local biodiversity.

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Ontogeny drives allochthonous trophic support of snappers: Seascape connectivity along the mangrove-seagrass-coral reef continuum of a tropical marine protected area

Cited by 17 publications

References 77 publications

Evidence of ontogenetic partitioning of restored coastal habitat by a generalist sportfish

Evidence of ontogenetic partitioning of restored coastal habitat by a generalist sportfish

Modeling and Risk Analysis of Dam-Break Flooding in a Semi-Arid Montane Watershed: A Case Study of the Yabous Dam, Northeastern Algeria

Distribution Pattern of Mangrove Fish Communities in China

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