Potential long‐distance dispersal of freshwater diatoms adhering to waterfowl plumage

Manning, Faye; Curtis, P. Jefferson; Walker, Ian R.; Pither, Jason

doi:10.1111/fwb.13706

Cited by 12 publications

(5 citation statements)

References 66 publications

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“…Both epizoochory and endozoochory are important for microbial dispersal by waterbirds, but it is unclear which mechanism is dominant. Manning et al (2021) investigated the potential of epizoochory by dipping breast feathers from mallards Anas platyrhynchos in cultures of diatoms and showed that their survival when stuck to feathers increases with relative air humidity. Tesson et al (2018) used in vitro gut-simulation to investigate the endozoochory potential of dinoflagellates, confirming that resting cysts survived gut conditions.…”

Section: Under S Tudied Role Of Waterb Irds a S Vec Tor S For Microb E Smentioning

confidence: 99%

“…Sensitivity analysis for wintering waterbirds suggests that maximum gut retention times have less influence on seed dispersal kernels than the nature of bird movements per se, reinforcing the need to include quality tracking data to obtain valid predictions (Martín-Vélez, Leeuwen, et al, 2021). Some studies of endozoochory have made unrealistic estimates of the scale of dispersal, as they fail to accurately account for waterbird movement, and make simple extrapolations from a retention time curve by assuming propagule ingestion is followed by non-stop flights (e.g., Manning et al, 2021;Raulings et al, 2011). However, ringing recoveries have been used to make general predictions for kernels during seasonal migration, and have shown that migrating ducks can facilitate dispersal on a very large scale, predicting dispersal of over 3.5% of seeds to be over 100 km and up to 1,600 km, although maximum dispersal distances for Artemia cysts were about half that of seeds (Viana et al, 2013).…”

Section: Under S Tanding Waterb Ird Movements and Modelling Zoochorymentioning

confidence: 99%

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Dispersal of aquatic and terrestrial organisms by waterbirds: A review of current knowledge and future priorities

et al. 2023

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We review progress in our understanding of the importance of waterbirds as dispersal vectors of other organisms, and identify priorities for further research. Waterbirds are excellent for long‐distance dispersal (LDD), whereas other vectors such as fish and mammals disperse similar propagules, but over shorter distances. Empirical studies of internal and external transport by waterbirds have shown that the former mechanism generally is more important. Internal transport is widely recognised for aquatic plants and aquatic invertebrates with resting eggs, but also is important for other organisms (e.g., terrestrial flowering plants not dispersed by frugivores, bryophytes, tardigrades, fish eggs). Waterbird vectors also are important in terrestrial habitats, and provide connectivity across terrestrial–aquatic boundaries. There are important differences in the roles of different waterbird species, especially those using different habitats along the aquatic–terrestrial gradient. Early attempts to predict zoochory based on propagule morphology have been found wanting, and more research is needed into how the traits of vectors and vectored organisms (including life history, dormancy and growth traits) explain dispersal interactions. Experimental studies have focused on the potential of propagules to survive internal or external transport, and research into factors determining the establishment success of propagules after dispersal is lacking. Recent spatially explicit models of seed dispersal by waterbirds should be expanded to include invertebrate dispersal, and to compare multiple bird species in the same landscape. Network approaches have been applied to plant–waterbird dispersal interactions, and these are needed for invertebrates. Genetic studies support effective LDD of plants and invertebrates along waterbird flyways, but there remains a lack of examples at a local scale. Next Generation Sequencing and genomics should be applied to waterbird‐mediated dispersal across the landscape. More studies of biogeography, community ecology, or population genetics should integrate waterbird movements at the design stage. Zoochory research has paid little attention to the dispersal of non‐pathogenic microbes (both eukaryotic and prokaryotic). Nevertheless, there is evidence that dispersal via avian guts can be central to the connectivity of aquatic microbial metacommunities. More work on microbial dispersal by waterbirds should explore its implications for biogeochemistry, and the interchange with gut flora of other aquatic organisms. In the Anthropocene, the role of migratory waterbirds in LDD of plants and other organisms is particularly important, for example in compensating for loss of large migratory mammals and fish, allowing native species to adjust their distributions under global warming, and spreading alien species along flyways after their initial introductions by human vectors. Recent technological advances have opened exciting opportunities that should be fully exploited to further our understanding of dispersal by waterbirds.

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Section: Under S Tudied Role Of Waterb Irds a S Vec Tor S For Microb E Smentioning

confidence: 99%

Section: Under S Tanding Waterb Ird Movements and Modelling Zoochorymentioning

confidence: 99%

Dispersal of aquatic and terrestrial organisms by waterbirds: A review of current knowledge and future priorities

et al. 2023

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“…Cosmopolitanism is particularly limited between continents (less than 3%), whereas when considering climate zones, the subpolar (Fennoscandia) and temperate (France) zones – both located in Europe, shared 10% of the genetic variants. Such higher similarity is related to their close geographic location and strong connection by land that facilitate the transportation of freshwater diatoms (Manning et al, 2021). The case of the tropical continental samples (South America and Africa) is interesting: these two continents, which belong to the same climate zone, are separated by ca.…”

Section: Discussionmentioning

confidence: 99%

“…They are unicellular eukaryotic microalgae with large taxonomic diversity and marked species‐specific ecological preferences. The ability of diatoms to disperse through the air or through animal transportation is critical for the colonization of new locations (Manning et al, 2021). Still, not much is known about the geographic range and rate of diatoms' dispersal and their effects on the dynamics of communities across landscapes.…”

Section: Introductionmentioning

confidence: 99%

Revisiting global diversity and biogeography of freshwater diatoms: New insights from molecular data

Chonova,

Rimet,

Bouchez

et al. 2023

Environmental DNA

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The distribution of microorganisms has long been assumed to be cosmopolitan and primarily controlled by the environment, but recent studies suggest that microbes may also exhibit strong biogeographical patterns driven by dispersal limitation. Past attempts to study the global biogeography of freshwater diatoms have always encountered the great difficulty of collecting taxonomically harmonized large‐scale data. However, developments in molecular techniques and DNA metabarcoding provide a unique opportunity to overcome these limitations and to disclose diatom biodiversity at an unprecedented scale and resolution. Here, we assembled DNA metabarcoding data of freshwater benthic diatom communities sampled in seven geographic regions across the world to investigate how diatom diversity varies along latitude and to assess the proportion of genetic variants of these microorganisms which are exclusive or shared across regions. We observed significant differences in assemblages among climate zones and found that genetic richness is not affected by latitude, but by an island effect. The genetic resolution directly impacts the proportion of variants shared across regions; however, the majority of taxa remained specific to a single geographic region. Freshwater diatoms disperse over long distances and across oceans but at rates that allow the appearance of local genetic variants and the regionalization of assemblages. Future work should focus on putting these diversity dynamics into a temporal context, an approach that should be possible by bringing together new sequencing techniques and phylogeography.

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“…Since connectivity plays an important role in structuring aquatic communities in TRs (Cid et al, 2022), the focus was on two groups of organisms with contrasting dispersal abilities: diatoms and macroinvertebrates. Diatoms are widely dispersed (Bogan et al, 2017; Kristiansen, 1996) by water flow, wind, or animal vectors such as mammals and birds (Leone et al, 2014; Liu et al, 2013; Manning et al, 2021; Romero et al, 2003). Macroinvertebrates have two main dispersal modes (Bilton et al, 2001): i) active dispersers (e.g., adult dragonflies) can reach very long distances and they usually fly oriented upstream (Bogan & Boersma, 2012; French & McCauley, 2019); whereas ii) passive dispersers (e.g., larvae of non‐biting midges) might drift downstream (Brown et al, 2011; Sarremejane et al, 2020) or restrict their movements to the benthic zone (Kappes & Haase, 2012).…”

Section: Introductionmentioning

confidence: 99%

Integrating spatiotemporal hydrological connectivity into conservation planning to protect temporary rivers

Fernández‐Calero,

Cunillera‐Montcusí,

Hermoso

et al. 2024

Aquatic Conservation

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Temporary rivers (TRs) have been largely overlooked in conservation assessments. Because TRs are such dynamic ecosystems, spatial and temporal aspects of their hydrology and ecology need to be taken into account when designing conservation plans. The aim of this paper is to propose a set of recommendations that could be useful for managers to do this, using seasonal diatom and macroinvertebrate data from north‐eastern Spain as a case study. Beta diversity was partitioned into local and species contributions to beta diversity (LCBD and SCBD). Additionally, priority conservation sites covering the spatial distribution of all species were identified using Marxan and the selection frequency (MSF) of the sites served as a measure of the relative irreplaceability of each site. Using both approaches (beta diversity and Marxan), the effects of changing spatiotemporal connectivity and habitat heterogeneity on the selection and prioritization of sites to be conserved were assessed. It was found that LCBD and MSF ranged widely both in space and time. However, LCBD and MSF were weakly related. Marxan adequately represented all taxa by selecting a few sites, while LCBD selected communities with higher differentiation but not necessarily those with rare species. In addition, SCBDs assigned low values to rare taxa, thus care must be taken when using this index for conservation planning. Spatiotemporal connectivity and local habitat heterogeneity played a critical role at the regional and local scales, driving site prioritization. Overall, we recommend: 1) monitoring multiple hydrological phases to encompass the different community types and capturing total diversity; 2) using Marxan and LCBD in combination, to benefit from their complementary insights; and 3) integrating spatiotemporal isolation and habitat heterogeneity into conservation plans, since they are the main drivers of community variation over space and time in TRs.

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Potential long‐distance dispersal of freshwater diatoms adhering to waterfowl plumage

Cited by 12 publications

References 66 publications

Dispersal of aquatic and terrestrial organisms by waterbirds: A review of current knowledge and future priorities

Dispersal of aquatic and terrestrial organisms by waterbirds: A review of current knowledge and future priorities

Revisiting global diversity and biogeography of freshwater diatoms: New insights from molecular data

Integrating spatiotemporal hydrological connectivity into conservation planning to protect temporary rivers

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