Spatial heterogeneity of benthic copepods: a comparative aspect on composition, abundance, and correlation

Jayabarathi, R.; Padmavati, G.; Anandavelu, I.

doi:10.1186/s40555-015-0130-y

Cited by 7 publications

(6 citation statements)

References 44 publications

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“…Among meiobenthic organisms, crustaceans were found to be the second most abundant taxon in the MPA of Portofino [9] with a faunal composition comparable to other hard bottoms of the Mediterranean Sea [6,58]. The copepod fauna was dominated by the families Miraciidae, Laophontidae, Longipediidae and Thalestridae that are typically found in phytal habitats [13]. It was interesting to observe that some of the species found in Portofino matched with a species list reported from the Indian Ocean that underlines a high occurrence of cosmopolitan species in the study area and the existence of isocommunities in similar habitats, here hard rock substrates vs. dead coral debris [16].…”

Section: Discussionmentioning

confidence: 97%

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Habitat-Diversity Relations between Sessile Macrobenthos and Benthic Copepods in the Rocky Shores of a Marine Protected Area

Sbrocca

Troch

Losi

et al. 2021

Water

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In rocky shore systems, sessile macrobenthic assemblages may act as “ecosystem engineers” for many smaller benthic organisms. Thus, the influence of macrobenthic coverage on the diversity and assemblage structure of the harpacticoid copepod fauna was investigated in the rocky shores of a Marine Protect Area (MPA) in the Ligurian Sea (NW, Mediterranean Sea). Two sampling sites were investigated in two seasons at three different depths on both sub-vertical and inclined reefs. A total of 61 species of copepods mainly represented by Miraciidae, Laophontidae, Longipediidae and Thalestridae were found. The complex micro-topography of these substrata provided a wide variety of niches for many species with different lifestyles that suggests the important role of rocky shores to ensure the functioning of coastal ecosystems. The harpacticoid assemblage structure seemed mainly influenced by season and depth. The temporal spread observed is likely one of the underlying mechanisms of niche segregation that allows many species to co-occur in this specific environment along with a subordinate spatial segregation corresponding to the depth gradient. The results seem to support the hypothesis that the different species composition of the “ecosystem engineer” (and consequently its structure changes) are relevant in structuring the copepod assemblages. The comparison with previous data on general meiofauna underlines that higher surrogacy of the taxonomic identification could be used to study rocky shore communities, but the rich diversity that these systems host can only be understood at the lower taxonomic levels. The same holds for future evaluations of impact of environmental changes (including MPA regulations) on meiofaunal assemblages.

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Section: Discussionmentioning

confidence: 97%

“…Copepoda is one of the largest sub-classes of crustaceans, dominant numerically and also from the point of view of biomass both in the pelagic and benthic domains [12,13]. It is hypothesized that the ancestor of many families of copepods, which are now exploiting phytal or planktonic habitats, had an epibenthic lifestyle [14].…”

Section: Introductionmentioning

confidence: 99%

Habitat-Diversity Relations between Sessile Macrobenthos and Benthic Copepods in the Rocky Shores of a Marine Protected Area

Sbrocca

Troch

Losi

et al. 2021

Water

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“…A Bray-Curtis dissimilarity is robust to nonlinearities and has been found to exhibit good performance when analyzing categorical or binary data (Beals 1984) or dealing with data that have many dimensions of zero values (Field et al 1982). The Bray-Curtis dissimilarity algorithm has been used in many types of research on cluster studies or for a community division (Anderson et al 2016;Jayabarathi et al 2015). Ward's method that uses a hierarchical algorithm can further be used for agglomerative clusters, which is commonly used in bibliometrics studies for hierarchical analysis (e.g., Lee and Jeong 2008;Liu et al 2016).…”

Section: Clusteringmentioning

confidence: 99%

Visualizing research trends and research theme evolution in E-learning field: 1999–2018

Bai

Yong

2020

Scientometrics

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This paper aims to provide a comprehensive understanding of the evolution of major research themes and trends in e-learning research. A co-word analysis is applied for the analysis of the 21,656 keywords collected from 7214 articles published in 10 journals in the field of e-learning from the years 1999 to 2018. Specifically, a cluster analysis, social network analysis, strategic diagram, and graph theory were applied in the analysis for two time periods: 1999–2008 and 2009–2018. The study detects the bridging, popular, and core topics in e-learning research for the two periods. The research results indicate that e-learning research has undergone a health evolution over the past two decades. There is a temporal continuity of e-learning research because some research topics have kept their continuity over the studied 20 years. Meanwhile, the research traditions in the e-learning field are also continuously evolving with the development of new technologies. The results also offer useful hints on the future direction of how the field may evolve.

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“…For example, amphipods are known for their species‐specific associations with algae, sponges and ascidians, including within coral rubble where they benefit from enhanced resources and shelter (Bahrndorff & Løfstedt, 2004; Darwin & Krapp‐Schickel, 2011; Fraser, Stuart‐Smith, et al, 2020; Martínez‐Laiz et al, 2018; Thomas & Klebba, 2007; White & Reimer, 2012a, 2012b). Harpacticoid copepods are commonly found in high abundance in association with turf and macroalgae (Jayabarathi et al, 2015; Kramer et al, 2012), which are enriched with the particulate organic matter on which they feed (Buffan‐Dubau et al, 1996; Buffan‐Dubau & Carman, 2000). There is little empirical information to help explain why other taxa (e.g., micromolluscs: Pyramidellidae and Rissoellidae) exhibited positive relationships with macroalgae, but it can be assumed that motile cryptofauna generally benefit from increased resources in the microphytobenthos and/or added microhabitat complexity (Fraser, Lefcheck, et al, 2020; Kramer et al, 2017; Poore et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Hierarchical drivers of cryptic biodiversity on coral reefs

Wolfe

Kenyon

Desbiens

et al. 2023

Ecological Monographs

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Declines in habitat structural complexity have marked ecological outcomes, as currently observed in many of the world's ecosystems. Coral reefs have provided a model for such changes in marine ecosystems; still our understanding has been centered on corals and fishes at broad spatial scales when metazoan diversity on coral reefs is dominated by small cryptic taxa (herein: “cryptofauna”). Given the paucity of studies and high taxonomic complexity of the cryptofauna, both of which limit a priori hypotheses, we asked whether hierarchical structuring theory provides a compelling framework to impose order and quantify patterns. In general terms, we explored whether cryptic communities are sufficiently described by broad seascape parameters or limited by a set of processes operating at their distinctly nested microhabitat scale. To address this theory and gaps in knowledge for the cryptofauna, we characterized community structure in coral rubble, an eroded coral condition where biodiversity proliferates. Rubble was sampled along a depth and exposure gradient at Heron Island on the Great Barrier Reef, Australia, to parameterize environmental and morphological indicators of sessile taxa and motile cryptofauna communities. We used a hierarchical study framework from microhabitat to seascape scales, which were evaluated using nonstructured multivariate analyses and Bayesian structural equation modeling. While the nonstructured analyses showed the effects of seascape on the cryptobenthos and its community, this approach overlooked the finer hierarchical patterns in rubble ecology revealed only in the structured model. Seascape parameters (exposure and depth) influenced microhabitat complexity (i.e., rubble branchiness), which determined the cover of sessile organisms on rubble pieces, which shaped the motile cryptofauna community. Rubble is likely to be increasingly prevalent on coral reefs in the Anthropocene and is typically associated with low seascape‐level complexity and reduced macrofaunal richness. Parallel with hierarchical structuring theory, we showed a similar response operating at the microhabitat scale whereby low rubble complexity (i.e., branchiness) reduced cryptobenthic structure, diversity and size spectra. In a future ocean, we expect there may be an initial increase in biodiversity and trophodynamic processes derived from branching rubble, but a delay in ecosystem‐scale outcomes if coral, and thus rubble, generation and complexity is not sustained.

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Spatial heterogeneity of benthic copepods: a comparative aspect on composition, abundance, and correlation

Cited by 7 publications

References 44 publications

Habitat-Diversity Relations between Sessile Macrobenthos and Benthic Copepods in the Rocky Shores of a Marine Protected Area

Habitat-Diversity Relations between Sessile Macrobenthos and Benthic Copepods in the Rocky Shores of a Marine Protected Area

Visualizing research trends and research theme evolution in E-learning field: 1999–2018

Hierarchical drivers of cryptic biodiversity on coral reefs

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