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Wang C, Xu M, Zhang J, Zhou X. High-latitude invasion and environmental adaptability of the freshwater mussel Limnoperna fortunei in Beijing, China. Ecol Appl 2024; 34:e2887. [PMID: 37210676 DOI: 10.1002/eap.2887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 05/05/2023] [Accepted: 05/09/2023] [Indexed: 05/22/2023]
Abstract
The invasive freshwater mussel Limnoperna fortunei (Dunker, 1857) has spread widely throughout Asia and South America, especially via interbasin water diversion and navigation. The middle route of the South-to-North Water Transfer Project (SNWTP), whose terminal is Beijing, has diverted more than 60 billion m3 of water from the Yangtze River Basin to Northern China since December 2014. L. fortunei has spread north to Beijing along the SNWTP, biofouling its channels and tunnels. To determine the status of L. fortunei's invasion in Beijing, we systematically inspected the water bodies receiving southern water, including all branches of the SNWTP, water treatment plants, lakes, reservoirs, and rivers. We measured the densities of adults and veligers of L. fortunei and conducted eDNA analyses of water samples. A generalized linear model and canonical correspondence analysis were adopted to investigate the correlations between environmental (e.g., water temperature, conductivity, pH, total nitrogen, and phosphorus) and biological (e.g., chlorophyll a, plankton density, and community composition) variables and the densities of adults and veligers of L. fortunei. Water temperature is the most important factor in determining the densities of D-shaped and pediveliger veligers, with explanatory variable contributions of 56.2% and 43.9%, respectively. The pH affects the densities of D-shaped, umbonated, and pediveliger veligers. The density of plantigrade veligers is negatively correlated with the conductivity and positively correlated with the concentration of chlorophyll a. Canonical correspondence analysis shows a weak correlation between the dominant phytoplankton taxa and the density of veligers. The densities of D-shaped, umbonated, and pediveliger veligers are positively correlated with the density of small phytoplankton (12.54 ± 4.33 μm), and the density of plantigrade veligers is positively correlated with the density of large (16.12 ± 5.96 μm) phytoplankton. The density of planktonic veligers is well correlated with local abiotic variables, and that of plantigrade veligers is less correlated with local abiotic variables. This finding implies that controlling early-stage veligers by altering water temperature, pH, and food size might effectively control the establishment of further L. fortunei colonies.
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Affiliation(s)
- Congcong Wang
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China
| | - Mengzhen Xu
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China
| | - Jiahao Zhang
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China
| | - Xiongdong Zhou
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China
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2
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Liu L, Zhang L, Jin D, Wang H, Liu X, Wu R. Molecular and morphological evidence reveals a hidden new taxon in the endemic genus Pseudocuneopsis (Bivalvia, Unionidae) from China. Zookeys 2023; 1179:219-229. [PMID: 37731533 PMCID: PMC10507448 DOI: 10.3897/zookeys.1179.109817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 08/25/2023] [Indexed: 09/22/2023] Open
Abstract
A new species of freshwater mussel belonging to the genus Pseudocuneopsis, namely Pseudocuneopsiswuanasp. nov., is diagnosed and described from Guangxi Province, China. This paper provides a detailed shell morphological description, soft-body anatomical characteristics, and partial sequences of mitochondrial COI as DNA barcode data for the novel species. The new species can be distinguished from its congeners (Pseudocuneopsissichuanensis, P.yangshuoensis, and P.capitata) by shell shape, beak position, and surface sculpture. Phylogenetic analyses based on the mitochondrial COI gene reveal that Pseudocuneopsiswuanasp. nov. forms a sister group with P.yangshuoensis and exhibits an interspecific genetic distance of 5.1%. Therefore, we provide robust morphological and molecular evidence to support the validity of this new species.
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Affiliation(s)
- Lili Liu
- School of Life Science, Shanxi Normal University, Taiyuan 030031, ChinaShanxi Normal UniversityTaiyuanChina
| | - Liping Zhang
- School of Life Science, Shanxi Normal University, Taiyuan 030031, ChinaShanxi Normal UniversityTaiyuanChina
| | - Dandong Jin
- Datian High School, Linhai 317004, ChinaDatian High SchoolLinhaiChina
| | - Haotian Wang
- China Development Bank Guangxi Zhuang Autonomous Region Branch, Nanning 530025, ChinaChina Development Bank Guangxi Zhuang Autonomous Region BranchNanningChina
| | - Xiongjun Liu
- School of Life Science, Jiaying University, Meizhou 514015, ChinaJiaying UniversityMeizhouChina
| | - Ruiwen Wu
- School of Life Science, Shanxi Normal University, Taiyuan 030031, ChinaShanxi Normal UniversityTaiyuanChina
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3
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Burcham GN, Fisher B, Boedeker N. Histopathologic survey of free-living populations of 2 species of freshwater mussels in Indiana. Vet Pathol 2023; 60:628-639. [PMID: 37439539 DOI: 10.1177/03009858231185872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
Freshwater mussels are one of the most endangered groups of animals in Indiana, with nearly half of the native species either extirpated or listed as "state endangered" or of "special concern." Nationally, numerous freshwater mussel species are considered threatened. Freshwater mussel diseases are not well understood and few published accounts of freshwater mussel diseases with detailed histological descriptions exist. Mass mortality events within mussel populations are increasingly recognized, often with undetermined etiology. Our objective was to determine baseline histopathology in free-living populations of freshwater mussels. One-hundred twenty individual mussels representing 2 species-plain pocketbook (Lampsilis cardium) and fatmucket (Lampsilis siliquoidea)-were collected from 3 different locations within the Wildcat Creek watershed in central Indiana during June and July 2019. A cross-section through the visceral mass was obtained and immersed in 10% neutral-buffered formalin, with routine processing and hematoxylin and eosin staining. Branchial acariasis occurred in 43/60 fatmuckets and 22/60 plain pocketbooks. Infection with a bucephalid trematode was recognized in 18/60 fatmuckets, while infection of the gonadal duct with an unidentified trematode species was identified in 4/60 fatmuckets and 18/59 plain pocketbooks. Additional changes associated with unidentified trematodes, bacteria, fungi or oomycetes, and ciliates were observed. Other miscellaneous changes included mineralization, neuronal lipofuscinosis, and gonadal atrophy/atresia. A range of histological changes were observed. These changes likely represented background lesions: incidental findings, spontaneous infectious or endosymbiotic conditions, or normal physiological changes that routinely occur in free-living wild populations. Awareness of baseline lesions should inform future diagnostic investigations of mussel mortality events.
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Affiliation(s)
| | - Brant Fisher
- Indiana Department of Natural Resources, Edinburgh, IN
| | - Nancy Boedeker
- Purdue University, West Lafayette, IN and Dubois, IN
- Indiana Department of Natural Resources, Indianapolis, IN
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4
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Richard JC, Blevins E, Dunn CD, Leis EM, Goldberg TL. Viruses of Freshwater Mussels during Mass Mortality Events in Oregon and Washington, USA. Viruses 2023; 15:1719. [PMID: 37632061 PMCID: PMC10458741 DOI: 10.3390/v15081719] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/04/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
Freshwater mussels (Unionida) are globally imperiled, in part due to largely unexplained mass mortality events (MMEs). While recent studies have begun to investigate the possibility that mussel MMEs in the Eastern USA may be caused by infectious diseases, mussels in the Western USA have received relatively little attention in this regard. We conducted a two-year epidemiologic investigation of the role of viruses in ongoing MMEs of the Western pearlshell (Margaritifera falcata) and the Western ridged mussel (Gonidea angulata) in the Chehalis River and Columbia River watersheds in the Western USA. We characterized viromes of mussel hemolymph from 5 locations in 2018 and 2020 using metagenomic methods and identified 557 viruses based on assembled contiguous sequences, most of which are novel. We also characterized the distribution and diversity of a previously identified mussel Gammarhabdovirus related to pathogenic finfish viruses. Overall, we found few consistent associations between viruses and mussel health status. Variation in mussel viromes was most strongly driven by location, with little influence from date, species, or health status, though these variables together only explained ~1/3 of variation in virome composition. Our results demonstrate that Western freshwater mussels host remarkably diverse viromes, but no single virus or combination of viruses appears to be associated with morbidity or mortality during MMEs. Our findings have implications for the conservation of imperiled freshwater mussels, including efforts to enhance natural populations through captive propagation.
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Affiliation(s)
- Jordan C. Richard
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53706, USA;
- Southwestern Virginia Field Office, U.S. Fish and Wildlife Service, Abingdon, VA 24210, USA
| | - Emilie Blevins
- Xerces Society for Invertebrate Conservation, Portland, OR 97232, USA;
| | - Christopher D. Dunn
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53706, USA;
| | - Eric M. Leis
- La Crosse Fish Health Center, Midwest Fisheries Center, U.S. Fish and Wildlife Service, Onalaska, WI 54650, USA;
| | - Tony L. Goldberg
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53706, USA;
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Chen ZG, Dai YT, Ouyang S, Huang XC, Wu XP. Unveiling the identity of Diaurora Cockerell, 1903 (Bivalvia, Unionidae): morphology, molecular phylogenetics, and the description of a new species. Zookeys 2023; 1173:131-144. [PMID: 37577154 PMCID: PMC10415898 DOI: 10.3897/zookeys.1173.106148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 07/12/2023] [Indexed: 08/15/2023] Open
Abstract
The monotypic freshwater mussel genus Diaurora Cockerell, 1903 has long been enigmatic due to its rarity and morphological confusion with Acuticosta. In this study, we comprehensively redescribed Diauroraaurorea (Heude, 1883) through a detailed analysis of shell morphology and molecular phylogenetics of recently collected specimens. Moreover, a new species, Diauroralaevesp. nov., was identified from the Fuyishui River, a tributary of the Zishui River in Shaoyang County, Shaoyang City, Hunan Province, China. Molecular phylogenetic analyses showed that D.aurorea and D.laevesp. nov. were reciprocally monophyletic and formed a clade as sister to Schistodesmus. Our study underscores the necessity of further exploring the diversity of freshwater mussels in understudied small tributaries throughout China.
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Affiliation(s)
- Zhong-Guang Chen
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
| | - Yu-Ting Dai
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
| | - Shan Ouyang
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
| | - Xiao-Chen Huang
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
| | - Xiao-Ping Wu
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
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6
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Wu R, Liu L, Zhang L, Jia J, Jin D, Wu X, Liu X. New species of the genus Pseudocuneopsis Huang, Dai, Chen & Wu, 2022 (Bivalvia, Unionidae) from Guangxi Province, China. Zookeys 2023; 1166:261-270. [PMID: 37346767 PMCID: PMC10280198 DOI: 10.3897/zookeys.1166.104150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 05/22/2023] [Indexed: 06/23/2023] Open
Abstract
A new species of freshwater mussel belonging to the genus Pseudocuneopsis, namely Pseudocuneopsisyangshuoensissp. nov., is diagnosed and described from Guangxi Province, China. This paper provides a detailed morphological description, photograph of the type specimen, and anatomical characteristics along with partial sequences of mitochondrial COI as DNA barcode data for this novel species. The new species can be distinguished from its congeners (Pseudocuneopsissichuanensis and Pseudocuneopsiscapitata) by shell shape, beak position and surface sculpture. The interspecies genetic distance based on the COI barcode between P.yangshuoensissp. nov. and P.sichuanensis is 8%, while it reaches 9% with P.capitata. Therefore, we provide robust morphological and molecular evidence to support the validity of this new species.
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Affiliation(s)
- Ruiwen Wu
- School of Life Science, Shanxi Normal University, Taiyuan 030031, ChinaShanxi Normal UniversityTaiyuanChina
| | - Lili Liu
- School of Life Science, Shanxi Normal University, Taiyuan 030031, ChinaShanxi Normal UniversityTaiyuanChina
| | - Liping Zhang
- School of Life Science, Shanxi Normal University, Taiyuan 030031, ChinaShanxi Normal UniversityTaiyuanChina
| | - Junli Jia
- School of Life Science, Shanxi Normal University, Taiyuan 030031, ChinaShanxi Normal UniversityTaiyuanChina
| | - Dandong Jin
- Datian High School, Linhai 317004, ChinaDatian High SchoolLinhaiChina
| | - Xiaoping Wu
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
| | - Xiongjun Liu
- School of Life Science, Jiaying University, Meizhou 514015, ChinaJiaying UniversityMeizhouChina
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Barber LB, Pickard HM, Alvarez DA, Becanova J, Keefe SH, LeBlanc DR, Lohmann R, Steevens JA, Vajda AM. Uptake of Per- and Polyfluoroalkyl Substances by Fish, Mussel, and Passive Samplers in Mobile-Laboratory Exposures Using Groundwater from a Contamination Plume at a Historical Fire Training Area, Cape Cod, Massachusetts. Environ Sci Technol 2023; 57:5544-5557. [PMID: 36972291 PMCID: PMC10116195 DOI: 10.1021/acs.est.2c06500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Aqueous film-forming foams historically were used during fire training activities on Joint Base Cape Cod, Massachusetts, and created an extensive per- and polyfluoroalkyl substances (PFAS) groundwater contamination plume. The potential for PFAS bioconcentration from exposure to the contaminated groundwater, which discharges to surface water bodies, was assessed with mobile-laboratory experiments using groundwater from the contamination plume and a nearby reference location. The on-site continuous-flow 21-day exposures used male and female fathead minnows, freshwater mussels, polar organic chemical integrative samplers (POCIS), and polyethylene tube samplers (PETS) to evaluate biotic and abiotic uptake. The composition of the PFAS-contaminated groundwater was complex and 9 PFAS were detected in the reference groundwater and 17 PFAS were detected in the contaminated groundwater. The summed PFAS concentrations ranged from 120 to 140 ng L-1 in reference groundwater and 6100 to 15,000 ng L-1 in contaminated groundwater. Biotic concentration factors (CFb) for individual PFAS were species, sex, source, and compound-specific and ranged from 2.9 to 1000 L kg-1 in whole-body male fish exposed to contaminated groundwater for 21 days. The fish and mussel CFb generally increased with increasing fluorocarbon chain length and were greater for sulfonates than for carboxylates. The exception was perfluorohexane sulfonate, which deviated from the linear trend and had a 10-fold difference in CFb between sites, possibly because of biotransformation of precursors such as perfluorohexane sulfonamide. Uptake for most PFAS in male fish was linear over time, whereas female fish had bilinear uptake indicated by an initial increase in tissue concentrations followed by a decrease. Uptake of PFAS was less for mussels (maximum CFb = 200) than for fish, and mussel uptake of most PFAS also was bilinear. Although abiotic concentration factors were greater than CFb, and values for POCIS were greater than for PETS, passive samplers were useful for assessing PFAS that potentially bioconcentrate in fish but are present at concentrations below method quantitation limits in water. Passive samplers also accumulate short-chain PFAS that are not bioconcentrated.
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Affiliation(s)
- Larry B Barber
- U.S. Geological Survey, 3215 Marine Street, Boulder, Colorado 80303, United States
| | - Heidi M Pickard
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States
| | - David A Alvarez
- U.S. Geological Survey, 4200 New Haven Road, Columbia, Missouri 65201, United States
| | - Jitka Becanova
- Graduate School of Oceanography, University of Rhode Island, Horn Building 118, 215 South Ferry Road, Narragansett, Rhode Island 02882, United States
| | - Steffanie H Keefe
- U.S. Geological Survey, 3215 Marine Street, Boulder, Colorado 80303, United States
| | - Denis R LeBlanc
- U.S. Geological Survey, 10 Bearfoot Road, Northborough, Massachusetts 01532, United States
| | - Rainer Lohmann
- Graduate School of Oceanography, University of Rhode Island, Horn Building 118, 215 South Ferry Road, Narragansett, Rhode Island 02882, United States
| | - Jeffery A Steevens
- U.S. Geological Survey, 4200 New Haven Road, Columbia, Missouri 65201, United States
| | - Alan M Vajda
- University of Colorado Denver, P.O. Box 173364, Denver, Colorado 80217, United States
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Abstract
Understanding how ecological communities are assembled remains a key goal of ecosystem ecology. Because communities are hierarchical, factors acting at multiple scales can contribute to patterns of community structure. Parasites provide a natural system to explore this idea, as they exist as discrete communities within host individuals, which are themselves part of a community and metacommunity. We aimed to understand the relative contribution of multi-scale drivers in parasite community assembly and assess how patterns at one level may mask those occurring at another. Specifically, we wanted to disentangle patterns caused by passive sampling from those determined by ecological drivers, and how these vary with scale. We applied a Markov Random Fields model and assessed measures of β-diversity and nestedness for 420 replicate parasite infracommunities (parasite assemblages in host individuals) across two freshwater mussel host species, three sites and two time periods, comparing our results to simulations from four different ecologically relevant null models. We showed that β-diversity between sites (explaining 25% of variation in parasite distribution) and host species (41%) is greater than expected, and β-diversity between individual hosts is smaller than expected, even after accounting for parasite prevalence and characteristics of host individuals. Furthermore, parasite communities were significantly less nested than expected once parasite prevalence and host characteristics were both accounted for, but more nested than expected otherwise, suggesting a degree of modularity at the within-host level that is masked if underlying host and parasite characteristics are not taken into account. The Markov Random Fields model provided evidence for possible competitive within-host parasite interactions, providing a mechanism for the observed infracommunity modularity. An integrative approach that examines factors at multiple scales is necessary to understand the composition of ecological communities. Furthermore, patterns at one level can alter the interpretation of ecologically important drivers at another if variation at higher scales is not accounted for.
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Affiliation(s)
- Joshua I Brian
- Aquatic Ecology Group, The David Attenborough Building, Department of Zoology, University of Cambridge, Cambridge, UK.,Department of Geography, Bush House NE, King's College London, London, UK
| | - David C Aldridge
- Aquatic Ecology Group, The David Attenborough Building, Department of Zoology, University of Cambridge, Cambridge, UK
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9
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Aldridge DC, Ollard IS, Bespalaya YV, Bolotov IN, Douda K, Geist J, Haag WR, Klunzinger MW, Lopes‐Lima M, Mlambo MC, Riccardi N, Sousa R, Strayer DL, Torres SH, Vaughn CC, Zając T, Zieritz A. Freshwater mussel conservation: A global horizon scan of emerging threats and opportunities. Glob Chang Biol 2023; 29:575-589. [PMID: 36444494 PMCID: PMC10100069 DOI: 10.1111/gcb.16510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 09/27/2022] [Accepted: 10/15/2022] [Indexed: 06/16/2023]
Abstract
We identified 14 emerging and poorly understood threats and opportunities for addressing the global conservation of freshwater mussels over the next decade. A panel of 17 researchers and stakeholders from six continents submitted a total of 56 topics that were ranked and prioritized using a consensus-building Delphi technique. Our 14 priority topics fell into five broad themes (autecology, population dynamics, global stressors, global diversity, and ecosystem services) and included understanding diets throughout mussel life history; identifying the drivers of population declines; defining metrics for quantifying mussel health; assessing the role of predators, parasites, and disease; informed guidance on the risks and opportunities for captive breeding and translocations; the loss of mussel-fish co-evolutionary relationships; assessing the effects of increasing surface water changes; understanding the effects of sand and aggregate mining; understanding the effects of drug pollution and other emerging contaminants such as nanomaterials; appreciating the threats and opportunities arising from river restoration; conserving understudied hotspots by building local capacity through the principles of decolonization; identifying appropriate taxonomic units for conservation; improved quantification of the ecosystem services provided by mussels; and understanding how many mussels are enough to provide these services. Solutions for addressing the topics ranged from ecological studies to technological advances and socio-political engagement. Prioritization of our topics can help to drive a proactive approach to the conservation of this declining group which provides a multitude of important ecosystem services.
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Affiliation(s)
- David C. Aldridge
- Aquatic Ecology Group, Department of ZoologyUniversity of CambridgeCambridgeUK
| | - Isobel S. Ollard
- Aquatic Ecology Group, Department of ZoologyUniversity of CambridgeCambridgeUK
| | - Yulia V. Bespalaya
- N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of SciencesArkhangelskRussia
| | - Ivan N. Bolotov
- N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Academy of SciencesArkhangelskRussia
- Northern Arctic Federal UniversityArkhangelskRussia
| | - Karel Douda
- Department of Zoology and FisheriesCzech University of Life Sciences PraguePragueCzech Republic
| | - Juergen Geist
- Aquatic Systems Biology UnitTechnical University of MunichFreisingGermany
| | - Wendell R. Haag
- Southern Research Station, Center for Bottomland Hardwoods ResearchU.S. Forest ServiceFrankfortKentuckyUSA
| | - Michael W. Klunzinger
- Australian Rivers InstituteGriffith UniversityNathanQueenslandAustralia
- Department of Aquatic ZoologyWestern Australian MuseumWelshpoolWestern AustralianAustralia
| | - Manuel Lopes‐Lima
- CIBIO/InBIO/BIOPOLIS—Research Center in Biodiversity and Genetic ResourcesUniversity of PortoVairãoPortugal
| | - Musa C. Mlambo
- Department of Freshwater InvertebratesAlbany MuseumMakhandaSouth Africa
- Department of Zoology and EntomologyRhodes UniversityMakhandaSouth Africa
| | | | - Ronaldo Sousa
- CBMA—Centre of Molecular and Environmental Biology, Department of BiologyUniversity of MinhoBragaPortugal
| | - David L. Strayer
- Cary Institute of Ecosystem StudiesMillbrookNew YorkUSA
- Graham Sustainability InstituteUniversity of MichiganAnn ArborMichiganUSA
| | - Santiago H. Torres
- Centro de Investigaciones y Transferencia Santa Cruz (CONICET, UNPA, UTN), Unidad Académica San JuliánUniversidad Nacional de la Patagonia AustralSanta CruzArgentina
| | - Caryn C. Vaughn
- Oklahoma Biological Survey and Department of BiologyUniversity of OklahomaNormanOklahomaUSA
| | - Tadeusz Zając
- Institute of Nature ConservationPolish Academy of SciencesKrakówPoland
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10
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Lombard NJ, Bokare M, Harrison R, Yonkos L, Pinkney A, Murali D, Ghosh U. Codeployment of Passive Samplers and Mussels Reveals Major Source of Ongoing PCB Inputs to the Anacostia River in Washington, DC. Environ Sci Technol 2023; 57:1320-1331. [PMID: 36622805 DOI: 10.1021/acs.est.2c06646] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Remedial investigations of sites contaminated with legacy pollutants like polychlorinated biphenyls (PCBs) have traditionally focused on mapping sediment contamination to develop a site conceptual model and select remedy options. Ignoring dissolved concentrations that drive transport and bioaccumulation often leads to an incomplete assessment of ongoing inputs to the water column and overestimation of potential effectiveness of sediment remediation. Here, we demonstrate the utility of codeployment of passive equilibrium samplers and freshwater mussels as dual lines of evidence to identify ongoing sources of PCBs from eight main tributaries of the Anacostia River in Washington, DC, that has been historically polluted from industrial and other human activities. The freely dissolved PCB concentrations measured using passive samplers tracked well with the accumulation in mussels and allowed predictions of biouptake within a factor of 2 for total PCBs and a factor of 4 for most congeners. One tributary was identified as the primary source of PCBs to the water column and became a focus of additional ongoing investigations. Codeployment of passive samplers and mussels provides strong lines of evidence to refine site conceptual models and identify ongoing sources critical to control to achieve river water quality standards and reduce bioaccumulation in the aquatic food web.
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Affiliation(s)
- Nathalie J Lombard
- Department of Chemical, Biochemical, and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, Maryland21250, United States
| | - Mandar Bokare
- Department of Chemical, Biochemical, and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, Maryland21250, United States
| | - Rachel Harrison
- Department of Environmental Science and Technology, University of Maryland, College Park, Maryland20740, United States
| | - Lance Yonkos
- Department of Environmental Science and Technology, University of Maryland, College Park, Maryland20740, United States
| | - Alfred Pinkney
- United States Fish and Wildlife Service, Chesapeake Bay Field Office, Annapolis, Maryland21401, United States
| | - Dev Murali
- District of Columbia Department of Energy and Environment, Washington, District of Columbia20002, United States
| | - Upal Ghosh
- Department of Chemical, Biochemical, and Environmental Engineering, University of Maryland, Baltimore County, Baltimore, Maryland21250, United States
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11
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Gill SP, Learman DR, Annis ML, Woolnough DA. Freshwater mussels and host fish gut microbe community composition shifts after agricultural contaminant exposure. J Appl Microbiol 2022; 133:3645-3658. [PMID: 36056619 PMCID: PMC9825887 DOI: 10.1111/jam.15801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 08/23/2022] [Accepted: 08/29/2022] [Indexed: 01/11/2023]
Abstract
AIMS We examined the effects of a mixture of contaminants found in agricultural watersheds on the gut microbiota and physiology of both the freshwater mussel Lampsilis cardium, and L. cardium host fish Micropterus salmoides. METHODS AND RESULTS Lampsilis cardium and M. salmoides were exposed to three concentrations of agricultural contaminants for 60 days (observing behaviour daily) before being sampled for gut microbiota analyses. DNA was extracted from the gut samples, amplified via PCR, and sequenced using the Illumina Mi-Seq platform. Only L. cardium guts had differing microbiota across treatments, with an increase in potentially pathogenic Aeromonas. We also provide novel evidence of a core microbiota within L. cardium and M. salmoides. In terms of physiology, female L. cardium exhibited a decrease in movement and marsupial gill display in contaminant exposures. CONCLUSIONS Exposure to contaminants from agricultural watersheds may affect population recruitment within freshwater mussel communities over time. Specifically, increased pathogenic micro-organisms and altered behaviour can reduce the likelihood of glochidia dispersal. SIGNIFICANCE AND IMPACT OF THE STUDY This study supports emerging research that contaminants found in agricultural watersheds may be a factor in freshwater mussel population declines. It also provides novel evidence that unionids have a core gut microbiota.
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Affiliation(s)
- Stephanie P. Gill
- Biology Department and Institute for Great Lakes ResearchCentral Michigan UniversityMount PleasantMichiganUSA
| | - Deric R. Learman
- Biology Department and Institute for Great Lakes ResearchCentral Michigan UniversityMount PleasantMichiganUSA
| | - Mandy L. Annis
- US Fish & Wildlife Service, Michigan Ecological Services Field OfficeEast LansingMichiganUSA
| | - Daelyn A. Woolnough
- Biology Department and Institute for Great Lakes ResearchCentral Michigan UniversityMount PleasantMichiganUSA
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12
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Abstract
Freshwater mussels in the order Unionida are highly adapted to parasitize fish for the primary purpose of dispersal. The parasitic larval stage affixes itself to the gills or fins of the host where it becomes encysted in the tissue, eventually excysting to develop into a free-living adult. Research on the parasitic interactions between unionids and their host fishes has garnered attention recently due to the increase in worldwide preservation efforts surrounding this highly endangered and ecologically significant order. With the exception of heavy infestation events, these mussels cause minor effects to their hosts, typically only observable effect in combination with other stressors. Moreover, the range of effect intensities on the host varies greatly with the species involved in the interaction, an effect that may arise from different evolutionary strategies between long- and short-infesting mussels; a distinction not typically made in conservation practices. Lower growth and reduced osmotic potential in infested hosts are commonly observed and correlated with infestation load. These effects are typically also associated with increases in metabolic rate and behaviour indicative of stress. Host fish seem to compensate for this through a combination of rapid wound healing in the parasitized areas and higher ventilation rates. The findings are heavily biased towards Margaritifera margaritifera, a unique mussel not well suited for cross-species generalizations. Furthermore, the small body of molecular and genetic studies should be expanded as many conclusions are drawn from studies on the ultimate effects of glochidiosis rather than proximate studies on the underlying mechanisms.
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13
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Richard JC, Leis EM, Dunn CD, Harris C, Agbalog RE, Campbell LJ, Knowles S, Waller DL, Putnam JG, Goldberg TL. Freshwater Mussels Show Elevated Viral Richness and Intensity during a Mortality Event. Viruses 2022; 14:v14122603. [PMID: 36560607 PMCID: PMC9785814 DOI: 10.3390/v14122603] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022] Open
Abstract
Freshwater mussels (Unionida) are among the world's most imperiled taxa, but the relationship between freshwater mussel mortality events and infectious disease is largely unstudied. We surveyed viromes of a widespread and abundant species (mucket, Actinonaias ligamentina; syn: Ortmanniana ligamentina) experiencing a mortality event of unknown etiology in the Huron River, Michigan, in 2019-2020 and compared them to viromes from mucket in a healthy population in the St. Croix River, Wisconsin and a population from the Clinch River, Virginia and Tennessee, where a mortality event was affecting the congeneric pheasantshell (Actinonaias pectorosa; syn: Ortmanniana pectorosa) population. We identified 38 viruses, most of which were associated with mussels collected during the Huron River mortality event. Viral richness and cumulative viral read depths were significantly higher in moribund mussels from the Huron River than in healthy controls from each of the three populations. Our results demonstrate significant increases in the number and intensity of viral infections for freshwater mussels experiencing mortality events, whereas individuals from healthy populations have a substantially reduced virome comprising a limited number of species at low viral read depths.
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Affiliation(s)
- Jordan C. Richard
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53711, USA
- Southwestern Virginia Field Office, U.S. Fish and Wildlife Service, Abingdon, VA 24210, USA
- Correspondence: (J.C.R.); (T.L.G.)
| | - Eric M. Leis
- La Crosse Fish Health Center, Midwest Fisheries Center, U.S. Fish and Wildlife Service, Onalaska, WI 54650, USA
| | - Christopher D. Dunn
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53711, USA
| | - Cleyo Harris
- Michigan Department of Natural Resources, Waterford, MI 48327, USA
| | - Rose E. Agbalog
- Southwestern Virginia Field Office, U.S. Fish and Wildlife Service, Abingdon, VA 24210, USA
| | - Lewis J. Campbell
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53711, USA
| | - Susan Knowles
- U.S. Geological Survey, National Wildlife Health Center, Madison, WI 53711, USA
| | - Diane L. Waller
- U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, WI 54603, USA
| | - Joel G. Putnam
- U.S. Geological Survey, Upper Midwest Environmental Sciences Center, La Crosse, WI 54603, USA
| | - Tony L. Goldberg
- Department of Pathobiological Sciences and Freshwater & Marine Sciences Program, University of Wisconsin-Madison, Madison, WI 53711, USA
- Correspondence: (J.C.R.); (T.L.G.)
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14
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Lopez JW, Allen DC, Vaughn CC. White-tailed deer consumption of emergent macrophytes mediates aquatic-to-terrestrial nutrient flows. Ecol Evol 2022; 12:e9257. [PMID: 36110886 PMCID: PMC9465632 DOI: 10.1002/ece3.9257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 07/28/2022] [Accepted: 08/05/2022] [Indexed: 12/05/2022] Open
Abstract
Trophic interactions between mobile animals and their food sources often vector resource flows across ecosystem boundaries. However, the quality and quantity of such ecological subsidies may be altered by indirect interactions between seemingly unconnected taxa. We studied whether emergent macrophytes growing at the aquatic–terrestrial interface facilitate multi‐step aquatic‐to‐terrestrial resource flows between streams and terrestrial herbivores. We also explored whether aquatic animal aggregations indirectly promote such resource flows by creating biogeochemical hotspots of nutrient cycling and availability. We tested whether white‐tailed deer (Odocoileus virginianus) in eastern North America vector nutrient fluxes from streams to terrestrial ecosystems by consuming emergent macrophytes (Justicia americana) using isotope and nutrient analyses of fecal samples and motion‐sensing cameras. We also tested whether mussel‐generated biogeochemical hotspots might promote such fluxes by surveying the density and nutrient stoichiometry of J. americana beds growing in association with variable densities of freshwater mussels (Bivalvia: Unionoida). Fecal samples from riparian deer had 3% lower C:N and 20% lower C:P ratios than those in upland habitats. C and N isotopes suggested riparian deer ate both terrestrial and aquatic (J. americana) vegetation, whereas upland deer ate more terrestrial foods. Motion‐sensing cameras showed deer eating J. americana more than twice as frequently at mussel‐generated hotspots than non‐mussel sites. However, mussels were not associated with variation in J. americana growth or N and P content—although N isotopes in J. americana leaves did suggest assimilation of animal‐derived nutrients. Our findings suggest that white‐tailed deer may conduct significant transfers of aquatic‐derived nutrients into terrestrial habitats when they feed on macrophytes and defecate on land. Whether aquatic animal aggregations promote such resource flows by creating biogeochemical hotspots remains unresolved, but the nearly global distributions of the deer family (Cervidae) and of macrophytes suggest that cervid‐driven aquatic‐to‐terrestrial nutrient flows may be widespread and ecologically important.
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Affiliation(s)
- Jonathan W Lopez
- Department of Biology University of Oklahoma Norman Oklahoma USA.,Oklahoma Biological Survey University of Oklahoma Norman Oklahoma USA.,Present address: Department of Biological Sciences University of Alabama Tuscaloosa Alabama USA
| | - Daniel C Allen
- Department of Biology University of Oklahoma Norman Oklahoma USA.,Present address: Department of Ecosystem Science and Management Pennsylvania State University University Park Pennsylvania USA
| | - Caryn C Vaughn
- Department of Biology University of Oklahoma Norman Oklahoma USA.,Oklahoma Biological Survey University of Oklahoma Norman Oklahoma USA
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15
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Fujimoto Y, Chiba H, Shindo K, Kitazima J, Iwata M. Reproductive ecology and adaptive host choice correlated with body size in an autumn-spawning bitterling Acheilognathus typus. J Fish Biol 2022; 100:1195-1204. [PMID: 35194784 DOI: 10.1111/jfb.15017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 02/15/2022] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
The life history and reproductive ecology of an autumn-spawning bitterling Acheilognathus typus were studied under natural and experimental conditions. In the study pond, the embryos of A. typus emerged from mussels in May and grew rapidly until August, whereas overwintered age-1 fish grew slowly. Adult A. typus in the pond was smaller (32-47 mm in standard length) than they were in other habitats and mainly spawned in smaller mussels. The number of A. typus embryos in mussels was negatively correlated with the shell length of the mussel, and a lower number of embryos were observed in larger mussels (over 110 mm in shell length). In the mussel size-choice experiment conducted in an enclosure, smaller A. typus selected smaller mussels, and larger A. typus selected larger mussels for spawning. In some cases, smaller A. typus spawned in larger mussels and the number of spawned eggs ejected increased by over four times compared with other cases. These results of the enclosure experiment explained the lower number of embryos in larger mussels in the study pond. In addition, reproductive traits such as ovipositor length and the number of ovulated eggs of female A. typus, which are considered to contribute to their size-dependent host utilization, were positively correlated with their standard length. Because A. typus is geologically or seasonally isolated from other bitterling species, this size-dependent host utilization contributes to a reduction in intraspecies rather than interspecies competition.
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Affiliation(s)
- Yasufumi Fujimoto
- The Miyagi Prefectural Izunuma-Uchinuma Environmental Foundation, Kurihara, Japan
- Kitasato University School of Marine Biosciences, Sagamihara, Japan
| | - Hiroaki Chiba
- Kitasato University School of Marine Biosciences, Sagamihara, Japan
| | - Kentaro Shindo
- The Miyagi Prefectural Izunuma-Uchinuma Environmental Foundation, Kurihara, Japan
- Central Japan Bitterling Research Association, Komono-cho, Japan
| | - Junya Kitazima
- Central Japan Bitterling Research Association, Komono-cho, Japan
| | - Munehico Iwata
- Kitasato University School of Marine Biosciences, Sagamihara, Japan
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16
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Atici AA. The first evidence of microplastic uptake in natural freshwater mussel, Unio stevenianus from Karasu River, Turkey. Biomarkers 2021; 27:118-126. [PMID: 34918612 DOI: 10.1080/1354750x.2021.2020335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
PURPOSE Microplastic pollution is a major problem that threatens freshwater mussels as well as marine bivalves, since these filter-feeding organisms are directly exposed to microplastics in the water column. There is no study on the microplastic contamination of Unio stevenianus as a bioindicator organism. The aim of this study is to determine the microplastic contamination in U. stevenianus. MATERIALS AND METHODS In total, 32 U. stevenianus were obtained from three different sites from Karasu River, in October 2020. The soft tissue of each mussel was digested and filtered. The filters with microplastics were observed under a stereomicroscope. RESULTS A total of 1,253 microplastics, ranging from 0.81 to 6.69 items/gram (mean 2.85 ± 1.27 items/g) and 13.00 to 84.73 items/individual (mean 39.15 ± 16.95 items/individual), were extracted from soft tissues of mussel for all stations. The dominant of the detected microplastics consisted of fragment (48.8%) followed by fiber (47.5%) types, and ˂0.1 mm size (44.8%), irregular shape (48.7%) and black coloured (48.8%) items were the most uptaked microplastics. CONCLUSION This study indicated that U. stevenianus has a lot of pollution where there are a lot of microplastics in the river.
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Affiliation(s)
- Ataman Altug Atici
- Department of Fisheries Basic Sciences, Faculty of Fisheries, Van Yuzuncu Yil University, Van, Turkey
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17
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Richard JC, Campbell LJ, Leis EM, Agbalog RE, Dunn CD, Waller DL, Knowles S, Putnam JG, Goldberg TL. Mussel Mass Mortality and the Microbiome: Evidence for Shifts in the Bacterial Microbiome of a Declining Freshwater Bivalve. Microorganisms 2021; 9:1976. [PMID: 34576872 DOI: 10.3390/microorganisms9091976] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/09/2021] [Accepted: 09/14/2021] [Indexed: 01/04/2023] Open
Abstract
Freshwater mussels (Unionida) are suffering mass mortality events worldwide, but the causes remain enigmatic. Here, we describe an analysis of bacterial loads, community structure, and inferred metabolic pathways in the hemolymph of pheasantshells (Actinonaias pectorosa) from the Clinch River, USA, during a multi-year mass mortality event. Bacterial loads were approximately 2 logs higher in moribund mussels (cases) than in apparently healthy mussels (controls). Bacterial communities also differed between cases and controls, with fewer sequence variants (SVs) and higher relative abundances of the proteobacteria Yokenella regensburgei and Aeromonas salmonicida in cases than in controls. Inferred bacterial metabolic pathways demonstrated a predominance of degradation, utilization, and assimilation pathways in cases and a predominance of biosynthesis pathways in controls. Only two SVs correlated with Clinch densovirus 1, a virus previously shown to be strongly associated with mortality in this system: Deinococcota and Actinobacteriota, which were associated with densovirus-positive and densovirus-negative mussels, respectively. Overall, our results suggest that bacterial invasion and shifts in the bacterial microbiome during unionid mass mortality events may result from primary insults such as viral infection or environmental stressors. If so, bacterial communities in mussel hemolymph may be sensitive, if generalized, indicators of declining mussel health.
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18
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Wu R, Liu X, Kondo T, Ouyang S, Wu X. New species of the genus Inversidens Haas, 1911 (Unionoida, Unionidae, Gonideinae) from Jiangxi Province, China. Zookeys 2021; 1054:85-93. [PMID: 34393564 PMCID: PMC8354993 DOI: 10.3897/zookeys.1054.69075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Accepted: 07/09/2021] [Indexed: 11/12/2022] Open
Abstract
We diagnose and describe a new freshwater mussel species of the genus Inversidens, I.rentianensis sp. nov. from Jiangxi Province, China based on morphological characters and molecular data. This paper includes a morphological description and photograph of the holotype, and partial sequences of mitochondrial COI as DNA barcode data.
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Affiliation(s)
- Ruiwen Wu
- School of Life Science, Shanxi Normal University, Linfen 041000, ChinaShanxi Normal UniversityLinfenChina
| | - Xiongjun Liu
- School of Life Science, Jiaying University, Meizhou 514015, ChinaJiaying UniversityMeizhouChina
| | - Takaki Kondo
- Division of Natural Science, Osaka Kyoiku University, Osaka 582-8582, JapanOsaka Kyoiku UniversityOsakaJapan
| | - Shan Ouyang
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
| | - Xiaoping Wu
- School of Life Sciences, Nanchang University, Nanchang 330031, ChinaNanchang UniversityNanchangChina
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19
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Gomes-Dos-Santos A, Lopes-Lima M, Machado AM, Marcos Ramos A, Usié A, Bolotov IN, Vikhrev IV, Breton S, Castro LFC, da Fonseca RR, Geist J, Österling ME, Prié V, Teixeira A, Gan HM, Simakov O, Froufe E. The Crown Pearl: a draft genome assembly of the European freshwater pearl mussel Margaritifera margaritifera (Linnaeus, 1758). DNA Res 2021; 28:6182681. [PMID: 33755103 PMCID: PMC8088596 DOI: 10.1093/dnares/dsab002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 03/22/2021] [Indexed: 11/17/2022] Open
Abstract
Since historical times, the inherent human fascination with pearls turned the freshwater pearl mussel Margaritifera margaritifera (Linnaeus, 1758) into a highly valuable cultural and economic resource. Although pearl harvesting in M. margaritifera is nowadays residual, other human threats have aggravated the species conservation status, especially in Europe. This mussel presents a myriad of rare biological features, e.g. high longevity coupled with low senescence and Doubly Uniparental Inheritance of mitochondrial DNA, for which the underlying molecular mechanisms are poorly known. Here, the first draft genome assembly of M. margaritifera was produced using a combination of Illumina Paired-end and Mate-pair approaches. The genome assembly was 2.4 Gb long, possessing 105,185 scaffolds and a scaffold N50 length of 288,726 bp. The ab initio gene prediction allowed the identification of 35,119 protein-coding genes. This genome represents an essential resource for studying this species’ unique biological and evolutionary features and ultimately will help to develop new tools to promote its conservation.
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Affiliation(s)
- André Gomes-Dos-Santos
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, P 4450-208 Matosinhos, Portugal.,Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Manuel Lopes-Lima
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, P 4450-208 Matosinhos, Portugal.,CIBIO/InBIO-Research Center in Biodiversity and Genetic Resources, Universidade do Porto, Campus Agrário de Vairão, Rua Padre Armando Quintas, 4485-661 Vairão, Portugal.,IUCN SSC Mollusc Specialist Group, c/o IUCN, Cambridge, England
| | - André M Machado
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, P 4450-208 Matosinhos, Portugal
| | - António Marcos Ramos
- Centro de Biotecnologia Agrícola e Agro-alimentar do Alentejo (CEBAL), Instituto Politécnico de Beja (IPBeja), 7801-908 Beja, Portugal.,MED-Mediterranean Institute for Agriculture, Environment and Development, CEBAL-Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo, 7801-908 Beja, Portugal
| | - Ana Usié
- Centro de Biotecnologia Agrícola e Agro-alimentar do Alentejo (CEBAL), Instituto Politécnico de Beja (IPBeja), 7801-908 Beja, Portugal.,MED-Mediterranean Institute for Agriculture, Environment and Development, CEBAL-Centro de Biotecnologia Agrícola e Agro-Alimentar do Alentejo, 7801-908 Beja, Portugal
| | - Ivan N Bolotov
- Federal Center for Integrated Arctic Research, Russian Academy of Sciences, Arkhangelsk 163000, Russia
| | - Ilya V Vikhrev
- Federal Center for Integrated Arctic Research, Russian Academy of Sciences, Arkhangelsk 163000, Russia
| | - Sophie Breton
- Department of Biological Sciences, University of Montreal, Montreal, Canada
| | - L Filipe C Castro
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, P 4450-208 Matosinhos, Portugal.,Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal
| | - Rute R da Fonseca
- Center for Macroecology, Evolution and Climate, GLOBE Institute, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Juergen Geist
- Aquatic Systems Biology Unit, Technical University of Munich, TUM School of Life Sciences, D-85354 Freising, Germany
| | - Martin E Österling
- Department of Environmental and Life Sciences-Biology, Karlstad University, 651 88 Karlstad, Sweden
| | - Vincent Prié
- Research Associate, Institute of Systematics, Evolution, Biodiversity (ISYEB), National Museum of Natural History (MNHN), CNRS, SU, EPHE, 75005 Paris, France
| | - Amílcar Teixeira
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Bragança, Portugal
| | - Han Ming Gan
- GeneSEQ Sdn Bhd, Bandar Bukit Beruntung, Rawang 48300, Selangor, Malaysia
| | - Oleg Simakov
- Department of Neurosciences and Developmental Biology, University of Vienna, 1010 Vienna, Austria
| | - Elsa Froufe
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, S/N, P 4450-208 Matosinhos, Portugal
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20
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Abstract
From a genomics perspective, bivalves (Mollusca: Bivalvia) have been poorly explored with the exception for those of high economic value. The bivalve order Unionida, or freshwater mussels, has been of interest in recent genomic studies due to their unique mitochondrial biology and peculiar life cycle. However, genomic studies have been hindered by the lack of a high-quality reference genome. Here, I present a genome assembly of Potamilus streckersoni using Pacific Bioscience single-molecule real-time long reads and 10X Genomics-linked read sequencing. Further, I use RNA sequencing from multiple tissue types and life stages to annotate the reference genome. The final assembly was far superior to any previously published freshwater mussel genome and was represented by 2,368 scaffolds (2,472 contigs) and 1,776,755,624 bp, with a scaffold N50 of 2,051,244 bp. A high proportion of the assembly was comprised of repetitive elements (51.03%), aligning with genomic characteristics of other bivalves. The functional annotation returned 52,407 gene models (41,065 protein, 11,342 tRNAs), which was concordant with the estimated number of genes in other freshwater mussel species. This genetic resource, along with future studies developing high-quality genome assemblies and annotations, will be integral toward unraveling the genomic bases of ecologically and evolutionarily important traits in this hyper-diverse group.
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Affiliation(s)
- Chase H Smith
- Department of Integrative Biology, University of Texas, Austin, Texas, USA
- Biology Department, Baylor University, Waco, Texas, USA
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21
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Brian JI, Aldridge DC. Abundance data applied to a novel model invertebrate host shed new light on parasite community assembly in nature. J Anim Ecol 2021; 90:1096-1108. [PMID: 33522596 DOI: 10.1111/1365-2656.13436] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 01/08/2021] [Indexed: 11/29/2022]
Abstract
Understanding how environmental drivers influence the assembly of parasite communities, in addition to how parasites may interact at an infracommunity level, are fundamental requirements for the study of parasite ecology. Knowledge of how parasite communities are assembled will help to predict the risk of parasitism for hosts, and model how parasite communities may change under variable conditions. However, studies frequently rely on presence-absence data and examine multiple host species or sites, metrics which may be too coarse to characterise nuanced within-host patterns. We utilised a novel host system, the freshwater mussel Anodonta anatina, to investigate the drivers of community structure and explore parasite interactions. In addition, we aimed to highlight consistencies and inconsistencies between PA and abundance data. Our analysis incorporated 14 parasite taxa and 720 replicate infracommunities. Using Redundancy Analysis, a joint species distribution model and a Markov random field approach, we modelled the impact of both host-level and environment-level characteristics on parasite structure, as well as parasite-parasite correlations after accounting for all other factors. This approach was repeated for both the presence and abundance of all parasites. We demonstrated that the regional species pool, individual host characteristics (mussel length and gravidity) and predicted parasite-parasite interactions are all important but to varying degrees across parasite species, suggesting that applying generalities to parasite community construction is too simplistic. Furthermore, we showed that PA data fail to capture important density-dependent effects of parasite load for parasites with high abundance, and in general performs poorly for high-intensity parasites. Host and parasite traits, as well as broader environmental factors, all contribute to parasite community structure, emphasising that an integrated approach is required to study community assembly. However, care must be taken with the data used to infer patterns, as presence-absence data may lead to incorrect ecological inference.
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Affiliation(s)
- Joshua I Brian
- Aquatic Ecology Group, The David Attenborough Building, Department of Zoology, University of Cambridge, Cambridge, UK
| | - David C Aldridge
- Aquatic Ecology Group, The David Attenborough Building, Department of Zoology, University of Cambridge, Cambridge, UK
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22
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Atkinson CL, van Ee BC, Pfeiffer JM. Evolutionary history drives aspects of stoichiometric niche variation and functional effects within a guild. Ecology 2020; 101:e03100. [PMID: 32443181 DOI: 10.1002/ecy.3100] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Revised: 03/27/2020] [Accepted: 04/15/2020] [Indexed: 12/19/2022]
Abstract
Functional traits are characteristics of an organism that represents how it interacts with its environment and can influence the structure and function of ecosystems. Ecological stoichiometry provides a framework to understand ecosystem structure and function by modeling the coupled flow of elements (e.g. carbon [C], nitrogen [N], phosphorus [P]) between consumers and their environment. Animals tend to be homeostatic in their nutrient requirements and preferentially sequester the element in shortest supply relative to demand, and release relatively more of the element in excess. Tissue stoichiometry is an important functional trait that allows for predictions among the elemental composition of animals, their diet, and their waste products, with important effects on the cycling and availability of nutrients in ecosystems. Here, we examined the tissue stoichiometric niches (C:N:P) and nutrient recycling stoichiometries (N:P) of several filter-feeding freshwater mussels in the subfamily Ambleminae. Despite occupying the same functional-feeding group and being restricted to a single subfamily-level radiation, we found that species occupied distinct stoichiometric niches and that these niches varied, in part, as a function of their evolutionary history. The relationship between phylogenetic divergence and functional divergence suggests that evolutionary processes may be shaping niche complementarity and resource partitioning. Tissue and excretion stoichiometry were negatively correlated as predicted by stoichiometric theory. When scaled to the community, higher species richness and phylogenetic diversity resulted in greater functional evenness and reduced functional dispersion. Filter-feeding bivalves are an ecologically important guild in freshwater ecosystems globally, and our study provides a more nuanced view of the stoichiometric niches and ecological functions performed by this phylogenetically and ecologically diverse assemblage.
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Affiliation(s)
- Carla L Atkinson
- Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama, 35487, USA
| | - Brian C van Ee
- Department of Biological Sciences, University of Alabama, Tuscaloosa, Alabama, 35487, USA
| | - John M Pfeiffer
- National Museum of Natural History, Smithsonian Institution, Washington, D.C., 20560, USA
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23
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Kim HS. Minute tubercles in bitterling larvae: Developmental dynamic structures to prevent premature ejection by host mussels. Ecol Evol 2020; 10:5840-5851. [PMID: 32607194 PMCID: PMC7319156 DOI: 10.1002/ece3.6321] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 11/12/2022] Open
Abstract
Bitterlings are small freshwater fish that use long ovipositors to lay eggs in host mussels, and they have morphological adaptations to increase larval survival. The most well-known adaptation is the minute tubercles on the skin surface of larvae; they are developed in early-stage larvae with weak swimming ability and disappear in free-swimming larvae before they leave the host mussel.In the present study, I comprehensively analyzed the developmental stages of Rhodeus pseudosericeus larvae, their morphological and physiological characteristics, their migration inside mussels, and the development of minute tubercle in order to elucidate the morphological function of the minute tubercles. These tubercles began to develop 1 day after hatching (formation stage), grew for 2-5 days (growth stage), reached the peak height after 6-7 days (peak stage), abruptly reduced in height after 8-10 days (abrupt reduction stage), and gradually reduced in height (reduction stage) until completely disappearing 27 days after hatching (disappearance stage).The larvae remained in the mussels' interlamellar space of the gill demibranchs until 10 days after hatching and began to migrate to the suprabranchial cavity 11 days after hatching. At this time, the larvae had a heart rate and the caudal fin began to develop. At 24 days after hatching, the minute tubercles had almost disappeared, and some individuals were observed swimming out of the mussels.The results presented herein elucidate that the minute tubercles are the developmental dynamic structures that the bitterling larvae have morphologically adapted to prevent premature ejection from the mussel.
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Affiliation(s)
- Hyeong Su Kim
- Inland Aquaculture ResearchNational Institute of Fisheries ScienceChangwonRepublic of Korea
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Fukata Y, Iigo M. The complete mitochondrial genome of freshwater mussel Pronodularia japanensis (Gonideinae, Unionidae, Unionida) from Tochigi Prefecture, Japan, and its phylogenetic analysis. Mitochondrial DNA B Resour 2020; 5:1215-1217. [PMID: 33366917 PMCID: PMC7510832 DOI: 10.1080/23802359.2020.1730726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 02/11/2020] [Indexed: 11/16/2022]
Abstract
We have sequenced the female-type (F-type) complete mitochondrial genome of Pronodularia japanensis (Gonideinae, Unionidae, Unionida, Bivalvia) from Tochigi Prefecture, Japan. The complete F-type mitochondrial genome (16,803 bp; LC505454) contains 13 protein-coding genes, 2 rRNA genes, and 22 tRNA genes. Molecular phylogenetic analyses using complete F-type mitochondrial genomes of 56 Unionida species revealed the phylogenetic position of P. japanensis in Unionidae. This study should be basic data to investigate the genetic diversity in this species.
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Affiliation(s)
- Yohei Fukata
- Department of Applied Biological Chemistry, School of Agriculture, Utsunomiya University, Tochigi, Japan.,Department of Applied Life Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Masayuki Iigo
- Department of Applied Biological Chemistry, School of Agriculture, Utsunomiya University, Tochigi, Japan.,Department of Applied Life Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Center for Bioscience Research and Education, Utsunomiya University, Tochigi, Japan.,Center for Optical Research and Education, Utsunomiya University, Tochigi, Japan.,Center for Weed and Wildlife Management, Utsunomiya University, Tochigi, Japan
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25
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Fukata Y, Iigo M. The complete mitochondrial genome of freshwater mussel Nodularia douglasiae (Unionidae) from Lake Kasumigaura, Japan, and its phylogenetic analysis. Mitochondrial DNA B Resour 2019; 4:3488-3489. [PMID: 33366052 PMCID: PMC7707249 DOI: 10.1080/23802359.2019.1674738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
We have sequenced the female type (F-type) mitochondrial genome of Nodularia douglasiae (Unioninae, Unionidae, Unionida, Bivalvia) from Lake Kasumigaura, Japan, and inferred the Unioninae phylogeny using complete mitochondrial genome sequences. The complete F-type mitochondrial genome (15,779 bp; LC496352) contains 13 protein-coding genes, 2 rRNA genes, and 22 tRNA genes. Molecular phylogenetic analyses using complete F-type mitochondrial genomes from 15 Unioninae species including N. douglasiae from China and Korea were performed. This study should be basic data to investigate the genetic diversity of freshwater mussel N. douglasiae.
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Affiliation(s)
- Yohei Fukata
- Department of Applied Biological Chemistry, School of Agriculture, Utsunomiya University, Tochigi, Japan.,Department of Biotechnology, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Masayuki Iigo
- Department of Applied Biological Chemistry, School of Agriculture, Utsunomiya University, Tochigi, Japan.,Department of Biotechnology, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Tokyo, Japan.,Center for Bioscience Research and Education, Utsunomiya University, Tochigi, Japan.,Center for Optical Research and Education, Utsunomiya University, Tochigi, Japan.,Center for Weed and Wildlife Management, Utsunomiya University, Tochigi, Japan
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26
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Terui A, Ooue K, Urabe H, Nakamura F. Parasite infection induces size-dependent host dispersal: consequences for parasite persistence. Proc Biol Sci 2017; 284:rspb.2017.1491. [PMID: 29093220 DOI: 10.1098/rspb.2017.1491] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 10/02/2017] [Indexed: 11/12/2022] Open
Abstract
Host dispersal is now recognized as a key predictor of the landscape-level persistence and expansion of parasites. However, current theories treat post-infection dispersal propensities as a fixed trait, and the plastic nature of host's responses to parasite infection has long been underappreciated. Here, we present a mark-recapture experiment in a single host-parasite system (larval parasites of the freshwater mussel Margaritifera laevis and its salmonid fish host Oncorhynchus masou masou) and provide, to our knowledge, the first empirical evidence that parasite infection induces size-dependent host dispersal in the field. In response to parasite infection, large fish become more dispersive, whereas small fish tend to stay at the home patch. The observed plasticity in dispersal is interpretable from the viewpoint of host fitness: expected benefits (release from further infection) may exceed dispersal-associated costs for individuals with high dispersal ability (i.e. large fish) but are marginal for individuals with limited dispersal ability (i.e. small fish). Indeed, our growth analysis revealed that only small fish hosts incurred dispersal costs (reduced growth). Strikingly, our simulation study revealed that this plastic dispersal response of infected hosts substantially enhanced parasite persistence and occupancy in a spatially structured system. These results suggest that dispersal plasticity in host species is critical for understanding how parasites emerge, spatially spread, and persist in nature. Our findings provide a novel starting point for building a reliable, predictive model for parasite/disease management.
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Affiliation(s)
- Akira Terui
- Department of Ecology, Evolution, and Behavior, University of Minnesota, 1479 Gortner Avenue, St Paul, MN 55108, USA .,Department of Forest Science, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo 060-8589, Japan
| | - Keita Ooue
- Department of Forest Science, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo 060-8589, Japan
| | - Hirokazu Urabe
- Salmon and Freshwater Fisheries Research Institute, Hokkaido Research Organization, 3-373 Kitakashiwagi, Eniwa 061-1433, Japan
| | - Futoshi Nakamura
- Department of Forest Science, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo 060-8589, Japan
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Nishio M, Kawamoto T, Kawakami R, Edo K, Yamazaki Y. Life history and reproductive ecology of the endangered Itasenpara bitterling Acheilognathus longipinnis (Cyprinidae) in the Himi region, central Japan. J Fish Biol 2015; 87:616-633. [PMID: 26255608 DOI: 10.1111/jfb.12739] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 06/08/2015] [Indexed: 06/04/2023]
Abstract
The life history, reproductive ecology and habitat utilization of the Itasenpara (deepbody) bitterling Acheilognathus longipinnis were investigated in a lowland segment of the Moo River in Toyama Prefecture, central Honshu, Japan. Analysis of 1285 individuals revealed that the study population comprised a single size class, an age at maturation of 3 months and a life span of 1 year. On the basis of the growth pattern, the life cycle was divided into two stages: the juvenile stage, characterized by rapid growth, and the adult stage at which growth ceased. Spawning by A. longipinnis was recorded between early September and late October. Female A. longipinnis in the 0+ year age class began to mature when they reached a standard length (LS ) of 56·4 mm. Mature females had a large clutch size (maximum 273 eggs) and deposited highly adhesive and relatively large eggs (2·55 mm(3) ; major axis, 3·12 mm; minor axis, 1·22 mm) via a short ovipositor (mean length, 21·5 mm) into freshwater mussels. The embryos remained in the gill cavities of the freshwater mussels (used as a spawning substratum) and emerged as juveniles (LS , 9 mm). Habitat utilization during spawning was analysed using a generalized linear model. The best-fit model showed that three environmental factors (freshwater mussel availability, water depth and vegetation cover) were important variables for habitat utilization by A. longipinnis. Shallow areas (water depth, 250-330 mm) created for rice paddy management and areas with an abundance of cover were particularly effective for predator avoidance. These results suggest that maintenance of water level fluctuations corresponding with rice cultivation and the abundance of vegetation on the river bank (particularly avoidance of concrete revetments) is essential for conservation of this species under current practices for rice cultivation in Japan.
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Affiliation(s)
- M Nishio
- Board of Education in Himi City, Himi, Toyama 935-8686, Japan
- Graduate School of Science and Engineering for Research, University of Toyama, Toyama 930-8555, Japan
| | - T Kawamoto
- Fishery Research Laboratory, Kyushu University, 4-46-24 Tsuyazaki, Fukutsu, Fukuoka 811-3304, Japan
| | - R Kawakami
- Board of Education in Himi City, Himi, Toyama 935-8686, Japan
| | - K Edo
- Agency for Cultural Affairs, Chiyoda Ward, Tokyo 100-8959, Japan
| | - Y Yamazaki
- Graduate School of Science and Engineering for Research, University of Toyama, Toyama 930-8555, Japan
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28
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Terui A, Miyazaki Y, Yoshioka A, Matsuzaki SIS. A cryptic Allee effect: spatial contexts mask an existing fitness-density relationship. R Soc Open Sci 2015; 2:150034. [PMID: 26543582 PMCID: PMC4632546 DOI: 10.1098/rsos.150034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 05/07/2015] [Indexed: 06/05/2023]
Abstract
Current theories predict that Allee effects should be widespread in nature, but there is little consistency in empirical findings. We hypothesized that this gap can arise from ignoring spatial contexts (i.e. spatial scale and heterogeneity) that potentially mask an existing fitness-density relationship: a 'cryptic' Allee effect. To test this hypothesis, we analysed how spatial contexts interacted with conspecific density to influence the fertilization rate of the freshwater mussel Margaritifera laevis. This sessile organism has a simple fertilization process whereby females filter sperm from the water column; this system enabled us to readily assess the interaction between conspecific density and spatial heterogeneity (e.g. flow conditions) at multiple spatial levels. Our findings were twofold. First, positive density-dependence in fertilization was undetectable at a population scale (approx. less than 50.5 m(2)), probably reflecting the exponential decay of sperm density with distance from the sperm source. Second, the Allee effect was confirmed at a local level (0.25 m(2)), but only when certain flow conditions were met (slow current velocity and shallow water depth). These results suggest that spatial contexts can mask existing Allee effects.
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Affiliation(s)
- Akira Terui
- Department of Forest Science, Graduate School of Agriculture, Hokkaido University, Kita 9, Nishi 9, Kita-ku, Sapporo 060-8589, Japan
| | - Yusuke Miyazaki
- Kanagawa Prefectural Museum of Natural History, 499 Iryuda, Odawara, Kanagawa 250-0031, Japan
| | - Akira Yoshioka
- National Institute for Environmental Studies, Tsukuba-shi, Ibaraki 305-8506, Japan
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29
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Vaughn CC, Atkinson CL, Julian JP. Drought-induced changes in flow regimes lead to long-term losses in mussel-provided ecosystem services. Ecol Evol 2015; 5:1291-305. [PMID: 25859334 PMCID: PMC4377272 DOI: 10.1002/ece3.1442] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 01/29/2015] [Accepted: 01/31/2015] [Indexed: 11/11/2022] Open
Abstract
Extreme hydro-meteorological events such as droughts are becoming more frequent, intense, and persistent. This is particularly true in the south central USA, where rapidly growing urban areas are running out of water and human-engineered water storage and management are leading to broad-scale changes in flow regimes. The Kiamichi River in southeastern Oklahoma, USA, has high fish and freshwater mussel biodiversity. However, water from this rural river is desired by multiple urban areas and other entities. Freshwater mussels are large, long-lived filter feeders that provide important ecosystem services. We ask how observed changes in mussel biomass and community composition resulting from drought-induced changes in flow regimes might lead to changes in river ecosystem services. We sampled mussel communities in this river over a 20-year period that included two severe droughts. We then used laboratory-derived physiological rates and river-wide estimates of species-specific mussel biomass to estimate three aggregate ecosystem services provided by mussels over this time period: biofiltration, nutrient recycling (nitrogen and phosphorus), and nutrient storage (nitrogen, phosphorus, and carbon). Mussel populations declined over 60%, and declines were directly linked to drought-induced changes in flow regimes. All ecosystem services declined over time and mirrored biomass losses. Mussel declines were exacerbated by human water management, which has increased the magnitude and frequency of hydrologic drought in downstream reaches of the river. Freshwater mussels are globally imperiled and declining around the world. Summed across multiple streams and rivers, mussel losses similar to those we document here could have considerable consequences for downstream water quality although lost biofiltration and nutrient retention. While we cannot control the frequency and severity of climatological droughts, water releases from reservoirs could be used to augment stream flows and prevent compounded anthropogenic stressors.
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Affiliation(s)
- Caryn C Vaughn
- Oklahoma Biological Survey, Department of Biology, and Ecology and Evolutionary Biology Graduate Program, University of Oklahoma Norman, Oklahoma
| | - Carla L Atkinson
- Oklahoma Biological Survey, Department of Biology, and Ecology and Evolutionary Biology Graduate Program, University of Oklahoma Norman, Oklahoma ; Department of Biological Sciences, University of Alabama Tuscaloosa, Alabama
| | - Jason P Julian
- Department of Geography, Texas State University San Marcos, Texas
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Song XL, Ouyang S, Zhou CH, Wu XP. Complete maternal mitochondrial genome of freshwater mussel Anodonta lucida (Bivalvia: Unionidae: Anodontinae). Mitochondrial DNA A DNA Mapp Seq Anal 2014; 27:549-50. [PMID: 24708121 DOI: 10.3109/19401736.2014.905852] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The taxonomy of genus Anodonta is rather ambiguous, as it has great variation on the shell shape. Anodonta lucida is an endemic species of freshwater mussel in China, characterized by shining epidermis. The complete maternal mitochondrial genome of freshwater mussel A. lucida was first determined (GenBank accession no. KF667529). The genome is 16,285 bp long with an AT content of 64.02%. All the 37 typical animal mitochondrial genes are found, including 13 protein-coding genes, 22 tRNA genes, and 2 rRNA genes. The genome also contains 24 unassigned regions, ranking from 1 to 830 bp in length, the largest of which is the putative control region (CR). The base composition of the genome is A (36.32%), G (13.01%), T (27.70%) and C (22.98%). Gene order is identical to other species of Unionidae except Gonideinae.
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Affiliation(s)
- Xue-Lin Song
- a Center for Watershed Ecology, Institute of Life Science, Nanchang University , Nanchang , People's Republic of China , and.,b School of Life Sciences and Food Engineering, Nanchang University , Nanchang , People's Republic of China
| | - Shan Ouyang
- b School of Life Sciences and Food Engineering, Nanchang University , Nanchang , People's Republic of China
| | - Chun-Hua Zhou
- a Center for Watershed Ecology, Institute of Life Science, Nanchang University , Nanchang , People's Republic of China , and.,b School of Life Sciences and Food Engineering, Nanchang University , Nanchang , People's Republic of China
| | - Xiao-Ping Wu
- a Center for Watershed Ecology, Institute of Life Science, Nanchang University , Nanchang , People's Republic of China , and.,b School of Life Sciences and Food Engineering, Nanchang University , Nanchang , People's Republic of China
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31
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Allen DC, Galbraith HS, Vaughn CC, Spooner DE. A tale of two rivers: implications of water management practices for mussel biodiversity outcomes during droughts. Ambio 2013; 42:881-891. [PMID: 23828311 PMCID: PMC3790130 DOI: 10.1007/s13280-013-0420-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 05/01/2013] [Accepted: 06/11/2013] [Indexed: 06/02/2023]
Abstract
Droughts often pose situations where stream water levels are lowest while human demand for water is highest. Here we present results of an observational study documenting changes in freshwater mussel communities in two southern US rivers during a multi-year drought. During a 13-year period water releases into the Kiamichi River from an impoundment were halted during droughts, while minimum releases from an impoundment were maintained in the Little River. The Kiamichi observed nearly twice as many low-flow events known to cause mussel mortality than the Little, and regression tree analyses suggest that this difference was influenced by reduced releases. During this period mussel communities in the Kiamichi declined in species richness and abundance, changes that were not observed in the Little. These results suggest that reduced releases during droughts likely led to mussel declines in one river, while maintaining reservoir releases may have sustained mussel populations in another.
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Affiliation(s)
- Daniel C. Allen
- />Oklahoma Biological Survey and Department of Biology, University of Oklahoma, Norman, OK 73019 USA
- />School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI 48109 USA
| | - Heather S. Galbraith
- />Oklahoma Biological Survey and Department of Biology, University of Oklahoma, Norman, OK 73019 USA
- />United States Geological Survey, Northern Appalachian Research Laboratory, Leetown Science Center, 176 Straight Run Road, Wellsboro, PA 16901 USA
| | - Caryn C. Vaughn
- />Oklahoma Biological Survey and Department of Biology, University of Oklahoma, Norman, OK 73019 USA
| | - Daniel E. Spooner
- />Oklahoma Biological Survey and Department of Biology, University of Oklahoma, Norman, OK 73019 USA
- />United States Geological Survey, Northern Appalachian Research Laboratory, Leetown Science Center, 176 Straight Run Road, Wellsboro, PA 16901 USA
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