Spatiotemporal variation and sediment retention effects on nematode communities associated with Halimeda opuntia (Linnaeus) Lamouroux (1816) and Sargassum polyceratium Montagne (1837) seaweeds in a tropical phytal ecosystem

Oliveira, Daniel; Derycke, Sofie; Rocha, Clélia Mc Da; Barbosa, Débora Ferreira; Decraemer, Wilfrida; Santos, Giovanni dos

doi:10.1007/s00227-016-2882-2

Cited by 10 publications

(13 citation statements)

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“…This is consistent with previous studies on the distribution of free-living nematodes living in macroalgae that found common nematode species on different types of macroalgae, although the dominant species on each alga seemed to vary (Wieser, 1959; Heip et al ., 1985; Da Rocha et al ., 2006; De Oliveira et al ., 2016). The density and size of nematodes have been correlated with the morphological shape of macroalgae and the amount of detritus trapped (Heip et al ., 1985; De Oliveira et al ., 2016); similarly, we found more nematodes and a higher diversity in samples with the most sediment and algal material. In foliaceous algae from exposed coasts, small Chromadoridae were dominant, representing ~70% of total abundance (Da Rocha et al ., 2006).…”

Section: Discussionmentioning

confidence: 99%

“…Macroalgae are important providers of habitat for marine macrofaunal (Bracken et al ., 2007; Liuzzi & López Gappa, 2011) and meiofaunal invertebrates (Bell & Coen, 1982; Da Rocha et al ., 2006). Turf-forming algae that trap sediments can be particularly important for both macrofauna (Huff & Jarett, 2007) and meiofauna (De Oliveira et al ., 2016). Most studies on nematodes living in macroalgae have investigated the relationship between nematode assemblages and macroalgal morphological complexity (Gestoso et al ., 2010; De Oliveira et al ., 2016; Veiga et al ., 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Turf-forming algae that trap sediments can be particularly important for both macrofauna (Huff & Jarett, 2007) and meiofauna (De Oliveira et al ., 2016). Most studies on nematodes living in macroalgae have investigated the relationship between nematode assemblages and macroalgal morphological complexity (Gestoso et al ., 2010; De Oliveira et al ., 2016; Veiga et al ., 2016). Nematode density and diversity can be dependent on the morphology of macroalgae (Gibbons, 1988; Gee and Warwick, 1994 a , 1994 b ; Pérez-García et al ., 2015), and modified by a set of abiotic and biotic factors (Gibbons, 1988; Giere, 2009).…”

Section: Introductionmentioning

confidence: 99%

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A comparison of epiphytic nematode diversity and assemblages inCorallinaturves on British and South Korean coasts across hierarchical spatial scales

et al. 2019

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Cosmopolitan habitat-forming taxa of algae such as the genus Corallina provide an opportunity to compare patterns of biodiversity over wide geographic scales. Nematode assemblages inhabiting Corallina turves were compared between the south coasts of the British Isles and South Korea. A fully nested design was used with three regions in each country, two shores in each region and replicate samples taken from three patches on each shore to compare differences in the taxonomic and biological trait composition of nematode assemblages across scales. A biological traits approach, based on functional diversity of nematodes, was used to make comparisons between countries, among regions, between shores and among patches. The taxonomic and biological trait compositions of nematode assemblages were significantly different across all spatial scales (patches, shores, regions and countries). There is greater variation amongst nematode assemblages at the scale of shore than at other spatial scales. Nematode assemblage structure and functional traits are influenced by the local environmental factors on each shore including sea-surface temperature, the amount of sediment trapped in Corallina spp. and tidal range. The sea-surface temperature and the amount of sediment trapped in Corallina spp. were the predominant factors determining nematode abundance and composition of assemblages and their functional diversity.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A comparison of epiphytic nematode diversity and assemblages inCorallinaturves on British and South Korean coasts across hierarchical spatial scales

et al. 2019

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“…High epibiont diversity for loggerheads has been recorded in other studies (e.g., [22]). For example, dos Santos et al [3] compared nematode genera richness between hawksbill turtles and non-sedimentary natural and artificial substrates, demonstrating that turtle carapaces are hotspots of meiofauna and nematode biodiversity (Table S3; [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62]). However, it is worth noting the foraging differences between hawksbill and loggerhead sea turtles.…”

Section: Diversity and Structure Of Meiofauna On Loggerhead Carapacesmentioning

confidence: 99%

Meiofauna Life on Loggerhead Sea Turtles-Diversely Structured Abundance and Biodiversity Hotspots That Challenge the Meiofauna Paradox

et al. 2020

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Sea turtles migrate thousands of miles annually between foraging and breeding areas, carrying dozens of epibiont species with them on their journeys. Most sea turtle epibiont studies have focused on large-sized organisms, those visible to the naked eye. Here, we report previously undocumented levels of epibiont abundance and biodiversity for loggerhead sea turtles (Caretta caretta), by focusing on the microscopic meiofauna. During the peak of the 2018 loggerhead nesting season at St. George Island, Florida, USA, we sampled all epibionts from 24 carapaces. From the subsamples, we identified 38,874 meiofauna individuals belonging to 20 higher taxa. This means 810,753 individuals were recovered in our survey, with an average of 33,781 individuals per carapace. Of 6992 identified nematodes, 111 different genera were observed. To our knowledge, such levels of sea turtle epibiont abundance and diversity have never been recorded. Loggerhead carapaces are without doubt hotspots of meiofaunal and nematode diversity, especially compared to other non-sedimentary substrates. The posterior carapace sections harbored higher diversity and evenness compared to the anterior and middle sections, suggesting increased colonization and potentially facilitation favoring posterior carapace epibiosis, or increased disturbance on the anterior and middle carapace sections. Our findings also shed new light on the meiofauna paradox: “How do small, benthic meiofauna organisms become cosmopolitan over large geographic ranges?” Considering high loggerhead epibiont colonization, the large distances loggerheads migrate for reproduction and feeding, and the evolutionary age and sheer numbers of sea turtles worldwide, potentially large-scale exchange and dispersal for meiofauna through phoresis is implied. We distinguished different groups of loggerhead carapaces based on divergent epibiont communities, suggesting distinct epibiont colonization processes. These epibiont observations hold potential for investigating loggerhead movements and, hence, their conservation.

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“…In the presence of high inputs of organic matter, their abundance increases, helping to regulate this resource. They are also a source of high-quality food for other animals [8][9][10][11]. Currently, about 20,000 nematode species-of which 6500 are marine benthic (= meiofaunal)-have been formally described [12,13], with estimates ranging between 0.1 and 100 million species [14].…”

Section: Introductionmentioning

confidence: 99%

DNA Barcoding for Delimitation of Putative Mexican Marine Nematodes Species

2020

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Nematode biodiversity is mostly unknown; while about 20,000 nematode species have been described, estimates for species diversity range from 0.1 to 100 million. The study of nematode diversity, like that of meiofaunal organisms in general, has been mostly based on morphology-based taxonomy, a time-consuming and costly task that requires well-trained specialists. This work represents the first study on the taxonomy of Mexican nematodes that integrates morphological and molecular data. We added eleven new records to the Mexican Caribbean nematode species list: Anticomidae sp.1, Catanema sp.1, Enoploides gryphus, Eurystomina sp.1, Haliplectus bickneri, Metachromadora sp.1, Odontophora bermudensis, Oncholaimus sp.1, Onyx litorale, Proplatycoma fleurdelis, and Pontonema cf. simile. We improved the COI database with 57 new sequences from 20 morphotypes. All COI sequences obtained in this work are new entries for the international genetic databases GenBank and BOLD. Among the studied sites, we report the most extensive species record (12 species) at Cozumel. DNA barcoding and species delineation methods supported the occurrence of 20 evolutionary independent entities and confirmed the high taxonomic resolution of the COI gene. Different approaches provided consistent results: ABGD and mPTP methods disentangled 20 entities, whereas Barcode Index Numbers (BINs) recovered 22 genetic species. Results support DNA barcoding being an efficient, fast, and low-cost method to integrate into morphological observations in order to address taxonomical shortfalls in meiofaunal organisms.

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Spatiotemporal variation and sediment retention effects on nematode communities associated with Halimeda opuntia (Linnaeus) Lamouroux (1816) and Sargassum polyceratium Montagne (1837) seaweeds in a tropical phytal ecosystem

Cited by 10 publications

References 46 publications

A comparison of epiphytic nematode diversity and assemblages inCorallinaturves on British and South Korean coasts across hierarchical spatial scales

A comparison of epiphytic nematode diversity and assemblages inCorallinaturves on British and South Korean coasts across hierarchical spatial scales

Meiofauna Life on Loggerhead Sea Turtles-Diversely Structured Abundance and Biodiversity Hotspots That Challenge the Meiofauna Paradox

DNA Barcoding for Delimitation of Putative Mexican Marine Nematodes Species

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