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Open research questions in Marine Biology and Ecology Research

30 unresolved questions extracted from the limitations and future-work sections of 387 Marine Biology and Ecology Research papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • MSC-BASED SPECIES DELIMITATION 593 different data types and model assumptions, whereas the more exploratory approaches were 594 less stable and, in several configurations, limited by the signal in the loci or by computational 595 cost. 582 Species delimitation methods based on the multispecies coalescent are increasingly applied 583 across the tree of life, but how they behave in taxonomically difficult, non-model groups such 584 as sponges remains poorly understood.

    How Robust are Multispecies Coalescent Species Delimitations in Taxonomically Complex Systems? A Genomic Assessment Using Mediterranean Tethya Sponges · 2026 · DOI

  • Although the first papers on Antarctic rock pools were published early in the XX century, these water bodies have been not investigated in detail and comprehensively.

    Faunistic analysis of freshwater zooplankton in small rock pools of Maritime Antarctica · 2022 · DOI

  • The analysis focuses on 17 gastropod species at the LFDP over 1993-2019, but the generalizability of press versus pulse disturbance effects on gastropod biodiversity patterns to other tropical forest regions, different gastropod faunas, or alternative disturbance regimes (e.g., drought, landslides) is not discussed or tested.

    Long‐term trends in gastropod abundance and biodiversity: Disentangling effects of press versus pulse disturbances · 2022 · DOI

  • The niche-based framework in Figure 6 models species composition changes under environmental shifts and colonization scenarios, but empirical validation of these scenarios using the Luquillo Forest Dynamics Plot gastropod dataset—specifically testing whether novel communities emerge due to range expansions of regional species pools versus local adaptation—is absent.

    Long‐term trends in gastropod abundance and biodiversity: Disentangling effects of press versus pulse disturbances · 2022 · DOI

  • The study documents immediate effects of intense hurricanes on gastropods can be substantial with low resistance, yet before-and-after comparisons spanning the full recovery trajectory (0-5 years post-hurricane) for each of the three hurricanes (Hugo, Georges, Maria) are not systematically presented, limiting quantification of recovery rates and resilience differences across disturbance events.

    Long‐term trends in gastropod abundance and biodiversity: Disentangling effects of press versus pulse disturbances · 2022 · DOI

  • The variation partitioning analysis demonstrates that hurricane identity and succession explain more variation in gastropod composition than temperature variables, but the mechanisms underlying differential responses to specific hurricanes (Hugo, Georges, Maria) and their distinct disturbance intensities remain unspecified. Direct comparative analysis of how press versus pulse characteristics of individual hurricanes shape gastropod resistance and resilience is needed.

    Long‐term trends in gastropod abundance and biodiversity: Disentangling effects of press versus pulse disturbances · 2022 · DOI

  • Understorey temperature (UT) is used as a univariate representation of canopy closure effects on gastropod communities, yet the analysis does not incorporate site-specific variability in understorey temperature or other microclimatic variables (humidity, light penetration, litter depth) that may mediate gastropod responses to secondary succession after hurricanes.

    Long‐term trends in gastropod abundance and biodiversity: Disentangling effects of press versus pulse disturbances · 2022 · DOI

  • The study uses time after hurricane (TAH) as a univariate surrogate to represent multivariate microclimatic, abiotic, biotic, and structural characteristics of forest succession across all 40 sites within years. Site-specific characteristics and their variability directly linked to successional changes are excluded from analyses, limiting the mechanistic understanding of how heterogeneous post-disturbance microhabitats drive gastropod community responses.

    Long‐term trends in gastropod abundance and biodiversity: Disentangling effects of press versus pulse disturbances · 2022 · DOI

  • Termier, 1950 and Bathymodiolinae Kenk & Wilson, 1985 subfamilies in the family Mytilidae and also the family Septiferidae Scarlato et Starobogatov, 1979 was confirmed, although the rank of the later taxon is not universally recognized and it remains to be clarified in an additional study.

    Genetic Divergence of Mussels (Mollusca, Mytilidae) Based on the 28S rRNA, 18S rRNA, and H3 Nuclear Gene Sequences · 2018 · DOI

  • The Sub-Antarctic zone was a secondary objective during the establishment of the RAMS and is still lacking the impulse of the scientific community for some taxa.

    Southern Ocean Asteroidea: a proposed update for the Register of Antarctic Marine Species · 2015 · DOI

  • Mitochondrial gene arrangement may be phylogenetically informative, but it should be interpreted cautiously as a species-level taxonomic character given that genomic data for Deimatidae remain scarce.

    Morphological redescription and complete mitochondrial genome of Deima oloughlini (Holothuroidea, Synallactida, Deimatidae), with a new record from the northern Indian Ocean · 2026 · DOI

  • Both species reported in our study are rare, and there exists only a few records, which are limited to the Atlantic and Pacific oceans.

    First records of two rare and enigmatic nematodes, Rhaptothyreus typicus Hope & Murphy, 1969 and Bodonema vossi Jensen, 1991 (Nematoda, Rhaptothyreidae and Bodonematidae), from seamounts in the Andaman Sea · 2026 · DOI

  • Abstract Marine taxa have repeatedly introduced diversity to continental freshwater fish faunas, yet their contribution to total morphological disparity remains poorly quantified.

    Transient marine species disproportionately expand the morphospace of North American continental freshwater fishes · 2026 · DOI

  • Understudied bacterial genera present a dynamic phylogenetic landscape and opportunities for discovering new taxa as more strains are isolated and genomic data is added.

    Phylogenomic description of three novel species of the Microbulbifer genus, phylum Pseudomonadota, isolated from marine sponges and corals · 2026 · DOI

  • Host-associated microbiomes play vital roles in organismal health, ecological interactions, and evolution, yet little is known about how microbial communities shift during the transition from aquatic to increasingly terrestrial habitats.

    Skin microbiome mirrors habitat divergence in amphibious combtooth blenny fish (Teleostei, Blenniidae) · 2026 · DOI

  • Context The South Australian metropolitan coastline is a highly managed complex environment, yet our understanding of intertidal ecological communities is lacking.

    Temporal and spatial ecological community structure along metropolitan beaches · 2026 · DOI

  • Demographic inferences supported secondary contact between most pairs of metapopulations for both species, but the time since contact was insufficient for allele frequencies to rehomogenize.

    Conservation implications of low contemporary connectivity along the Mid‐Atlantic Ridge in hydrothermal vent gastropods · 2026 · DOI

  • This unexpected conspecificity, despite increased genomic resolution that often reveals cryptic diversity, highlights how much remains to be discovered about marine invertebrate distributions.

    Genomic evidence reveals a record-breaking range in <i>Tubulanus lutescens</i> (Nemertea) from shallow coasts to deep-sea seeps · 2026 · DOI

  • Most studies focus on active venting areas including their ecology, but the non-vent megafauna of the Central Indian Ridge and South East Indian Ridge remains poorly known.

    Megafauna of the German exploration licence area for seafloor massive sulphides along the Central and South East Indian Ridge (Indian Ocean) · 2021 · DOI

  • A phylogenetic system for the family Mytilidae and closely relative taxa of the order Mytilida, which currently has no consensus among specialists on the basis of traditional characters, is presented.

    Genetic Divergence of Mussels (Mollusca, Mytilidae) Based on the 28S rRNA, 18S rRNA, and H3 Nuclear Gene Sequences · 2018 · DOI

  • Although the use of copepods and chaetognaths in such a manner is well documented, still little is known about the potential of pelagic Coelenterata as possible indicator species; they are still poorly investigated in this part of the Arctic Ocean.

    Pelagic coelenterates in the Atlantic sector of the Arctic Ocean − species diversity and distribution as water mass indicators · 2015 · DOI

  • The Brazilian coast is home to one of the largest beds of the Southwestern Atlantic, but the lack of faunal studies in these habitats represents one of our major gaps in the knowledge of Brazilian biodiversity.

    Filling a Knowledge Gap on the Biodiversity of Rhodolith-Associated Echinodermata from Northeastern Brazil · 2014 · DOI

  • Future research should focus on global inventories, intercontinental comparative work, and investigation to determine why almost all presently described endemic taxa appear to be found in North America.

    Tidal Marshes: A Global Perspective on the Evolution and Conservation of Their Terrestrial Vertebrates · 2006 · DOI

  • The causes for these changes remain unclear, but are most likely connected to eutrophication related factors in the coastal ecosystem and concurrent interspecific interactions.

    A comparison between 1928 and 2000 indicates major changes in the macrozoobenthos species composition and abundance on the SW coast of Finland (Baltic Sea) · 2003 · DOI

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30 open questions have been extracted from the limitations and future-work passages of 387 Marine Biology and Ecology Research papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

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