An unusual occurrence of Thorea hispida (Thore) Desvaux chantransia on rusty crayfish in West Central Ohio

Fuelling, Lauren J.; Adams, Julie A.; Badik, Kevin J.; Bixby, Rebecca J.; Caprette, Christopher L.; Caprette, Heather E.; Chiasson, Wayne B.; Davies, Cara L.; DeColibus, Dawn T.; Glascock, Katrina I.; Hall, Melissa M.; Perry, William L.; Schultz, Eric R.; Taylor, David Anthony; Vis, Morgan L.; Verb, Robert G.

doi:10.1127/0029-5035/2012/0018

Cited by 8 publications

(4 citation statements)

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“…T. hispida has been reported to be cosmopolitan with low genetic diversity, possibly partly due to the aquarium trade (Johnston et al., 2018). This epizoic alga can hitchhike on rusty crayfish ( Orconectes rusticus ), which is a common invasive species in Asia (Fuelling et al., 2012). As far as we know, K. mahlacensis is not known as an introduced species elsewhere in the world.…”

Section: Discussionmentioning

confidence: 99%

Hidden introductions of freshwater red algae via the aquarium trade exposed by DNA barcodes

et al. 2020

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The global aquarium trade can introduce non‐native invasive freshwater organisms, which can impact local aquatic ecosystems and their biodiversity. It is unassessed whether the aquarium trade spreads freshwater red macroalgae that hitchhike on ornamental aquatic plants and animals. We investigated this via a broad biodiversity survey and genetic analysis of freshwater red algae in the field and aquarium shops in East Asia. Using rbcL‐based DNA barcoding, we surveyed 125 samples from 46 field sites and 88 samples from 53 aquarium shops (213 samples in total) mostly across Taiwan—a key hub in the global aquarium trade—as well as in Hong Kong, Okinawa (Japan), the Philippines, and Thailand. We augmented our rbcL sequences with GenBank rbcL sequences that represent 40 additional countries globally. We found 26 molecular operational taxonomic units (mOTUs), some of which are cryptic, in Taiwan. Phylogeographical analysis revealed three potential introduced mOTUs, which exhibit no local genetic variation in Taiwan and are distributed across continents. Also, we posit that aquaria may serve as an unintentional ex situ conservation site for freshwater red algae that are vulnerable to water pollution due to anthropogenic disturbances. Collectively, these data suggest that freshwater red algae have been hitchhiking and dispersed via the aquarium trade, an important and overlooked mechanism of introduction of the organisms across the globe.

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Section: Discussionmentioning

confidence: 99%

Hidden introductions of freshwater red algae via the aquarium trade exposed by DNA barcodes

et al. 2020

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“…This species is also known from northeastern China Shi 2003, Feng et al 2015). In North America, Thorea has been collected in the Ohio River, a stream in west central Ohio and the Hudson River in New York (Hirsch and Palmer 1958, Pueschel et al 1995, Fuelling et al 2012.…”

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confidence: 99%

Three gene phylogeny of the Thoreales (Rhodophyta) reveals high species diversity

Johnston

Dixon

West

et al. 2018

Journal of Phycology

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The freshwater red algal order Thoreales has triphasic life history composed of a diminutive diploid "Chantransia" stage, a distinctive macroscopic gametophyte with multi-axial growth and carposporophytes that develop on the gametophyte thallus. This order is comprised of two genera, Thorea and Nemalionopsis. Thorea has been widely reported with numerous species, whereas Nemalionopsis has been more rarely observed with only a few species described. DNA sequences from three loci (rbcL, cox1, and LSU) were used to examine the phylogenetic affinity of specimens collected from geographically distant locations including North America, South America, Europe, Pacific Islands, Southeast Asia, China, and India. Sixteen species of Thorea and two species of Nemalionopsis were recognized. Morphological observations confirmed the distinctness of the two genera and also provided some characters to distinguish species. However, many of the collections were in "Chantransia" stage rather than gametophyte stage, meaning that key diagnostic morphological characters were unavailable. Three new species are proposed primarily based on the DNA sequence data generated in this study, Thorea kokosinga-pueschelii, T. mauitukitukii, and T. quisqueyana. In addition to these newly described species, one DNA sequence from GenBank was not closely associated with other Thorea clades and may represent further diversity in the genus. Two species in Nemalionopsis are recognized, N. shawii and N. parkeri nom. et stat. nov. Thorea harbors more diversity than had been recognized by morphological data alone. Distribution data indicated that Nemalionopsis is common in the Pacific region, whereas Thorea is more globally distributed. Most species of Thorea have a regional distribution, but Thorea hispida appears to be cosmopolitan.

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“…Freshwater diatoms have been found on Testudines [71], Gastropoda Physidae [72], Rotifera [73], Copepoda [74] and, in particular, Crustacea Decapoda. Due to their generally large size and hard exoskeletons, freshwater crabs and crayfish ideally represent optimal basibionts for diatoms and other microalgae [68,75].…”

Section: Epizoic Relationshipsmentioning

confidence: 99%

Aquatic Insects and Benthic Diatoms: A History of Biotic Relationships in Freshwater Ecosystems

Fenoglio

Figueroa

Doretto

et al. 2020

Water

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The most important environmental characteristic in streams is flow. Due to the force of water current, most ecological processes and taxonomic richness in streams mainly occur in the riverbed. Benthic algae (mainly diatoms) and benthic macroinvertebrates (mainly aquatic insects) are among the most important groups in running water biodiversity, but relatively few studies have investigated their complex relationships. Here, we review the multifaceted interactions between these two important groups of lotic organisms. As the consumption of benthic algae, especially diatoms, was one of the earliest and most common trophic habits among aquatic insects, they then had to adapt to the particular habitat occupied by the algae. The environmental needs of diatoms have morphologically and behaviorally shaped their scrapers, leading to impressive evolutionary convergences between even very distant groups. Other less evident interactions are represented by the importance of insects, both in preimaginal and adult stages, in diatom dispersion. In addition, the top-down control of diatoms by their grazers contributes to their spatial organization and functional composition within the periphyton. Indeed, relationships between aquatic insects and diatoms are an important topic of study, scarcely investigated, the onset of which, hundreds of millions of years ago, has profoundly influenced the evolution of stream biological communities.

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An unusual occurrence of Thorea hispida (Thore) Desvaux chantransia on rusty crayfish in West Central Ohio

Cited by 8 publications

References 0 publications

Hidden introductions of freshwater red algae via the aquarium trade exposed by DNA barcodes

Hidden introductions of freshwater red algae via the aquarium trade exposed by DNA barcodes

Three gene phylogeny of the Thoreales (Rhodophyta) reveals high species diversity

Aquatic Insects and Benthic Diatoms: A History of Biotic Relationships in Freshwater Ecosystems

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