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Wei Z, Zhang X, Chen Y, Liu H, Wang S, Zhang M, Ma H, Yu K, Wang L. A new strategy based on a cascade amplification strategy biosensor for on-site eDNA detection and outbreak warning of crown-of-thorns starfish. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 927:172258. [PMID: 38583618 DOI: 10.1016/j.scitotenv.2024.172258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Population outbreaks of the crown-of-thorns starfish (COTS) seriously threaten the sustainability of coral reef ecosystems. However, traditional ecological monitoring techniques cannot provide early warning before the outbreaks, thus preventing timely intervention. Therefore, there is an urgent need for a more accurate and faster technology to predict the outbreaks of COTS. In this work, we developed an electrochemical biosensor based on a programmed catalytic hairpin assembly (CHA) and hybridization chain reaction (HCR) cyclic amplification strategy for sensitive and selective detection of COTS environmental DNA (eDNA) in water bodies. This biosensor exhibited excellent electrochemical characteristics, including a low limit of detection (LOD = 18.4 fM), low limit of quantification (LOQ = 41.1 fM), and wide linear range (50 fM - 10 nM). The biosensing technology successfully allowed the detection of COTS eDNA in the aquarium environment, and the results also demonstrated a significant correlation between eDNA concentration and COTS number (r = 0.990; P < 0.001). The reliability and accuracy of the biosensor results have been further validated through comparison with digital droplet PCR (ddPCR). Moreover, the applicability and accuracy of the biosensor were reconfirmed in field tests at the COTS outbreak site in the South China Sea, which has shown potential application in dynamically monitoring the larvae before the COTS outbreak. Therefore, this efficient electrochemical biosensing technology offers a new solution for on-site monitoring and early warning of the COTS outbreak.
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Affiliation(s)
- Zongwu Wei
- School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Xuzhe Zhang
- School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Yingzhan Chen
- School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Hongjie Liu
- School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Shaopeng Wang
- School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Man Zhang
- Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning 530004, China
| | - Honglin Ma
- Sansha Track Ocean Coral Reef Conservation Research Institute Co. Ltd., Qionghai 571499, China
| | - Kefu Yu
- Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning 530004, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China.
| | - Liwei Wang
- Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Coral Reef Research Center of China, School of Marine Sciences, Guangxi University, Nanning 530004, China.
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Matthews SA, Williamson DH, Beeden R, Emslie MJ, Abom RTM, Beard D, Bonin M, Bray P, Campili AR, Ceccarelli DM, Fernandes L, Fletcher CS, Godoy D, Hemingson CR, Jonker MJ, Lang BJ, Morris S, Mosquera E, Phillips GL, Sinclair-Taylor TH, Taylor S, Tracey D, Wilmes JC, Quincey R. Protecting Great Barrier Reef resilience through effective management of crown-of-thorns starfish outbreaks. PLoS One 2024; 19:e0298073. [PMID: 38656948 PMCID: PMC11042723 DOI: 10.1371/journal.pone.0298073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 01/18/2024] [Indexed: 04/26/2024] Open
Abstract
Resilience-based management is essential to protect ecosystems in the Anthropocene. Unlike large-scale climate threats to Great Barrier Reef (GBR) corals, outbreaks of coral-eating crown-of-thorns starfish (COTS; Acanthaster cf. solaris) can be directly managed through targeted culling. Here, we evaluate the outcomes of a decade of strategic COTS management in suppressing outbreaks and protecting corals during the 4th COTS outbreak wave at reef and regional scales (sectors). We compare COTS density and coral cover dynamics during the 3rd and 4th outbreak waves. During the 4th outbreak wave, sectors that received limited to no culling had sustained COTS outbreaks causing significant coral losses. In contrast, in sectors that received timely and sufficient cull effort, coral cover increased substantially, and outbreaks were suppressed with COTS densities up to six-fold lower than in the 3rd outbreak wave. In the Townsville sector for example, despite exposure to comparable disturbance regimes during the 4th outbreak wave, effective outbreak suppression coincided with relative increases in sector-wide coral cover (44%), versus significant coral cover declines (37%) during the 3rd outbreak wave. Importantly, these estimated increases span entire sectors, not just reefs with active COTS control. Outbreaking reefs with higher levels of culling had net increases in coral cover, while the rate of coral loss was more than halved on reefs with lower levels of cull effort. Our results also indicate that outbreak wave progression to adjoining sectors has been delayed, probably via suppression of COTS larval supply. Our findings provide compelling evidence that proactive, targeted, and sustained COTS management can effectively suppress COTS outbreaks and deliver coral growth and recovery benefits at reef and sector-wide scales. The clear coral protection outcomes demonstrate the value of targeted manual culling as both a scalable intervention to mitigate COTS outbreaks, and a potent resilience-based management tool to "buy time" for coral reefs, protecting reef ecosystem functions and biodiversity as the climate changes.
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Affiliation(s)
| | | | - Roger Beeden
- Great Barrier Reef Marine Park Authority, Townsville, QLD, Australia
| | | | | | | | - Mary Bonin
- Great Barrier Reef Foundation, Brisbane City, QLD, Australia
| | - Peran Bray
- Australian Institute of Marine Science, Townsville, QLD, Australia
| | | | | | - Leanne Fernandes
- Great Barrier Reef Marine Park Authority, Townsville, QLD, Australia
| | | | - Dan Godoy
- Blue Planet Marine, Canberra, ACT, Australia
| | - Christopher R. Hemingson
- The University of Texas at Austin, Marine Science Institute, Port Aransas, Texas, United States of America
| | | | - Bethan J. Lang
- Great Barrier Reef Marine Park Authority, Townsville, QLD, Australia
- The University of New South Wales, Sydney, NSW, Australia
- ARC Centre of Excellence, James Cook University, Townsville, QLD, Australia
| | | | | | - Gareth L. Phillips
- Association of Marine Park Tourism Operators Ltd, Cairns, QLD, Australia
| | | | - Sascha Taylor
- Queensland Department of Environment and Science, Queensland Parks and Wildlife Service and Partnerships (Marine Parks), Brisbane, Queensland, Australia
| | - Dieter Tracey
- Great Barrier Reef Marine Park Authority, Townsville, QLD, Australia
| | | | - Richard Quincey
- Great Barrier Reef Marine Park Authority, Townsville, QLD, Australia
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3
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Yang C, Du Y, Zeng X, Ni G. Development and Testing of Species-Specific Primers for Detecting the Presence of the Northern Pacific Sea Star (Asterias amurensis) from Environmental DNA. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2024; 26:215-222. [PMID: 38341825 DOI: 10.1007/s10126-024-10292-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/25/2024] [Indexed: 02/13/2024]
Abstract
The starfish Asterias amurensis, a well-known predator of molluscan species in intertidal ecosystems, has caused substantial ecological and economic losses in North China such as offshore Qingdao. Effective monitoring and prevention measures are urged to minimize its negative impacts. Compared with traditional biomonitoring methods, environmental DNA technology has emerged as a powerful and cost-efficient tool for inferring species' presence and abundance. In this study, we developed a pair of species-specific primers (i.e., Ast-F and Ast-R) for the A. amurensis mitochondrial COI gene and tested its utility in amplifying and quantifying the DNA fragments from environmental samples under both laboratory and field conditions. The results of controlled water tank experiments demonstrated that the amount of eDNA released by A. amurensis was positively related to its biomass; after the removal of the starfish, the eDNA degraded significantly in 24 h and remained detectable for 8 days. The number of eDNA copies enriched tended to increase with smaller pore size of filter membrane and larger volume of filtered water. For field tests, we confirmed the validation of our approach in six locations in Qingdao by filtering 1000 ml water per sample with a 0.45-µm pore size filtration. All the amplification products generated a single and bright band via gel electrophoresis, and the quantitative PCR results unveiled significant differences in eDNA copies. This study provided an eDNA-based approach for investigating the distribution and biomass of A. amurensis, which may help to formulate early warning and management strategies in coastal Qingdao and other regions.
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Affiliation(s)
- Chenhu Yang
- Ministry of Education Key Laboratory of Mariculture, Ocean University of China, Qingdao, 266003, China
| | - Yanzhen Du
- Ministry of Education Key Laboratory of Mariculture, Ocean University of China, Qingdao, 266003, China
| | - Xiaoqi Zeng
- Ministry of Education Key Laboratory of Mariculture, Ocean University of China, Qingdao, 266003, China
- Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, 266003, China
| | - Gang Ni
- Ministry of Education Key Laboratory of Mariculture, Ocean University of China, Qingdao, 266003, China.
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Popovic I, Bergeron LA, Bozec YM, Waldvogel AM, Howitt SM, Damjanovic K, Patel F, Cabrera MG, Wörheide G, Uthicke S, Riginos C. High germline mutation rates, but not extreme population outbreaks, influence genetic diversity in a keystone coral predator. PLoS Genet 2024; 20:e1011129. [PMID: 38346089 PMCID: PMC10861045 DOI: 10.1371/journal.pgen.1011129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 01/08/2024] [Indexed: 02/15/2024] Open
Abstract
Lewontin's paradox, the observation that levels of genetic diversity (π) do not scale linearly with census population size (Nc) variation, is an evolutionary conundrum. The most extreme mismatches between π and Nc are found for highly abundant marine invertebrates. Yet, the influences of new mutations on π relative to extrinsic processes such as Nc fluctuations are unknown. Here, we provide the first germline mutation rate (μ) estimate for a marine invertebrate in corallivorous crown-of-thorns sea stars (Acanthaster cf. solaris). We use high-coverage whole-genome sequencing of 14 parent-offspring trios alongside empirical estimates of Nc in Australia's Great Barrier Reef to jointly examine the determinants of π in populations undergoing extreme Nc fluctuations. The A. cf. solaris mean μ was 9.13 x 10-09 mutations per-site per-generation (95% CI: 6.51 x 10-09 to 1.18 x 10-08), exceeding estimates for other invertebrates and showing greater concordance with vertebrate mutation rates. Lower-than-expected Ne (~70,000-180,000) and low Ne/Nc values (0.0047-0.048) indicated weak influences of population outbreaks on long-term π. Our findings are consistent with elevated μ evolving in response to reduced Ne and generation time length, with important implications for explaining high mutational loads and the determinants of genetic diversity in marine invertebrate taxa.
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Affiliation(s)
- Iva Popovic
- School of the Environment, The University of Queensland, St Lucia, Queensland, Australia
| | - Lucie A. Bergeron
- Villum Centre for Biodiversity Genomics, Section for Ecology and Evolution, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Yves-Marie Bozec
- School of the Environment, The University of Queensland, St Lucia, Queensland, Australia
| | | | - Samantha M. Howitt
- School of the Environment, The University of Queensland, St Lucia, Queensland, Australia
| | | | - Frances Patel
- Australian Institute of Marine Science, Townsville, Australia
| | | | - Gert Wörheide
- Department of Earth and Environmental Sciences, Paleontology and Geobiology, Ludwig-Maximilians-Universität München, Munich, Germany
- GeoBio-Center, Ludwig-Maximilians-Universität München, Munich, Germany
- Staatliche Naturwissenschaftliche Sammlungen Bayerns (SNSB)–Bayerische Staatssammlung für Paläontologie und Geologie, Munich, Germany
| | - Sven Uthicke
- Australian Institute of Marine Science, Townsville, Australia
| | - Cynthia Riginos
- School of the Environment, The University of Queensland, St Lucia, Queensland, Australia
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Porco D, Purnomo CA, Glesener L, Proess R, Lippert S, Jans K, Colling G, Schneider S, Stassen R, Frantz AC. eDNA-based monitoring of Batrachochytrium dendrobatidis and Batrachochytrium salamandrivorans with ddPCR in Luxembourg ponds: taking signals below the Limit of Detection (LOD) into account. BMC Ecol Evol 2024; 24:4. [PMID: 38178008 PMCID: PMC10768104 DOI: 10.1186/s12862-023-02189-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 12/09/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND Batrachochytrium dendrobatidis (Bd) and Batrachochytrium salamandrivorans (Bsal) are two pathogenic fungi that are a significant threat to amphibian communities worldwide. European populations are strongly impacted and the monitoring of the presence and spread of these pathogens is crucial for efficient decision-making in conservation management. RESULTS Here we proposed an environmental DNA (eDNA) monitoring of these two pathogenic agents through droplet digital PCR (ddPCR) based on water samples from 24 ponds in Luxembourg. In addition, amphibians were swabbed in eight of the targeted ponds in order to compare the two approaches at site-level detection. This study allowed the development of a new method taking below-Limit of Detection (LOD) results into account thanks to the statistical comparison of the frequencies of false positives in no template controls (NTC) and below-LOD results in technical replicates. In the eDNA-based approach, the use of this method led to an increase in Bd and Bsal detection of 28 and 50% respectively. In swabbing, this resulted in 8% more positive results for Bd. In some samples, the use of technical replicates allowed to recover above-LOD signals and increase Bd detection by 35 and 33% respectively for eDNA and swabbing, and Bsal detection by 25% for eDNA. CONCLUSIONS These results confirmed the usefulness of technical replicates to overcome high levels of stochasticity in very low concentration samples even for a highly sensitive technique such as ddPCR. In addition, it showed that below-LOD signals could be consistently recovered and the corresponding amplification events assigned either to positive or negative detection via the method developed here. This methodology might be particularly worth pursuing in pathogenic agents' detection as false negatives could have important adverse consequences. In total, 15 ponds were found positive for Bd and four for Bsal. This study reports the first record of Bsal in Luxembourg.
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Affiliation(s)
- David Porco
- Musée national d'histoire naturelle du Luxembourg, 25, rue Münster, Luxembourg, L-2160, Luxembourg.
- Fondation Faune Flore, 24, rue Münster, Luxembourg, L-2160, Luxembourg.
| | - Chanistya Ayu Purnomo
- Musée national d'histoire naturelle du Luxembourg, 25, rue Münster, Luxembourg, L-2160, Luxembourg
| | - Liza Glesener
- Naturschutzsyndikat SICONA, 12, rue de Capellen, L-8393 Olm, Luxembourg, Luxembourg
| | - Roland Proess
- Umweltplanungsbüro Ecotop, 45, Schlassuecht, L-7435 Hollenfels, Luxembourg, Luxembourg
| | - Stéphanie Lippert
- Musée national d'histoire naturelle du Luxembourg, 25, rue Münster, Luxembourg, L-2160, Luxembourg
| | - Kevin Jans
- Natur&ëmwelt Fondation Hëllef fir d'Natur, 5, Route de Luxembourg, L-1899, Kockelscheuer, Luxembourg
| | - Guy Colling
- Musée national d'histoire naturelle du Luxembourg, 25, rue Münster, Luxembourg, L-2160, Luxembourg
- Fondation Faune Flore, 24, rue Münster, Luxembourg, L-2160, Luxembourg
| | - Simone Schneider
- Musée national d'histoire naturelle du Luxembourg, 25, rue Münster, Luxembourg, L-2160, Luxembourg
- Naturschutzsyndikat SICONA, 12, rue de Capellen, L-8393 Olm, Luxembourg, Luxembourg
| | - Raf Stassen
- Biota.lu, 9a, Rue Principale, L-6990, Hostert, Luxembourg
| | - Alain C Frantz
- Musée national d'histoire naturelle du Luxembourg, 25, rue Münster, Luxembourg, L-2160, Luxembourg
- Fondation Faune Flore, 24, rue Münster, Luxembourg, L-2160, Luxembourg
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6
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Wang L, Bin Q, Liu H, Zhang Y, Wang S, Luo S, Chen Z, Zhang M, Yu K. New insights into the on-site monitoring of probiotics eDNA using biosensing technology for heat-stress relieving in coral reefs. Biosens Bioelectron 2024; 243:115790. [PMID: 37906999 DOI: 10.1016/j.bios.2023.115790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 10/24/2023] [Indexed: 11/02/2023]
Abstract
Coral probiotics can improve the tolerance of corals to heat stress, thus mitigating the process of coral thermal bleaching. Sensitive and specific detection of coral probiotics at low abundances is highly desirable but remains challenging, especially for rapid and on-site detection of coral probiotics. Since the electrochemical biosensor has been recently used in the field of environmental DNA (eDNA) detection, herein, an efficient electrochemical biosensor was developed based on CoS2/CoSe2-NC HNCs electrode material with a specific DNA probe for the C. marina detection. After optimization, the lower limit of detection (LOD) values of such biosensors for the target DNA and genomic DNA were 1.58 fM and 6.5 pM, respectively. On this basis, a portable device was constructed for the practical detection of C. marina eDNA, and its reliability and accuracy were verified by comparison with the ddPCR method (P > 0.05). For each analysis, the average cost was only ∼ $1.08 and could be completed within 100 min with reliable sensitivity and specificity. Overall, the biosensor could reflect the protective effect of probiotics on coral heat stress, and the proposed technique will put new insights into the rapid and on-site detection of coral probiotics to assist corals against global warming.
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Affiliation(s)
- Liwei Wang
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China; Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning, 530004, China; Guangxi, Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Nanning, 530004, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China
| | - Qi Bin
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Hongjie Liu
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Yibo Zhang
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Shaopeng Wang
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Songlin Luo
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China
| | - Zhenghua Chen
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China; Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning, 530004, China
| | - Man Zhang
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China; Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning, 530004, China.
| | - Kefu Yu
- School of Marine Sciences, School of Resources, Environment and Materials, School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China; Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning, 530004, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, China.
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E Z, Luo P, Ren C, Cheng C, Pan W, Jiang X, Jiang F, Ma B, Yu S, Zhang X, Chen T, Hu C. Applications of Environmental DNA (eDNA) in Monitoring the Endangered Status and Evaluating the Stock Enhancement Effect of Tropical Sea Cucumber Holothuria Scabra. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2023; 25:778-789. [PMID: 37658250 DOI: 10.1007/s10126-023-10239-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/01/2023] [Indexed: 09/03/2023]
Abstract
The tropical sea cucumber Holothuria scabra is naturally found in the Indo-West Pacific. However, due to their commercial value, natural H. scabra populations have declined significantly in recent years, resulting in its status as an endangered species. Surveys of H. scabra resource pose a challenge due to its specific characteristics, such as sand-burrowing behavior. To overcome this problem, our study established a convenient and feasible method for assessing H. scabra resources using environmental DNA (eDNA) monitoring technology. First, H. scabra-specific TaqMan primers and probe were designed based on its cox1 gene, followed by the development of an eDNA monitoring method for H. scabra in two separate sea areas (Xuwen and Daya Bay). The method was subsequently employed to investigate the distribution of H. scabra and assess the effects of aquaculture stock enhancement through juvenile releasing in the Weizhou Island sea area. The H. scabra eDNA monitoring approach was found to be more appropriate and credible than traditional methods, and a positive impact of stocking on H. scabra populations was observed. In summary, this is the first report to quantify eDNA concentration in a Holothuroidea species, and it provides a convenient and accurate method for surveying H. scabra resources. This study introduces novel concepts for eDNA-based detection of endangered marine benthic animals and monitoring their population distribution and abundance.
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Affiliation(s)
- Zixuan E
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Peng Luo
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, People's Republic of China
| | - Chunhua Ren
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, People's Republic of China
| | - Chuhang Cheng
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Wenjie Pan
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Xiao Jiang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, People's Republic of China
| | - Fajun Jiang
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China
| | - Bo Ma
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Suzhong Yu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Xin Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, People's Republic of China
| | - Ting Chen
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China.
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, 511458, People's Republic of China.
| | - Chaoqun Hu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, People's Republic of China.
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Beibu Gulf Marine Research Center, Guangxi Academy of Sciences, Nanning, 530007, People's Republic of China.
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8
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Wang L, Xu J, Liu H, Wang S, Ou W, Zhang M, Wei F, Luo S, Chen B, Zhang S, Yu K. Ultrasensitive and on-site eDNA detection for the monitoring of crown-of-thorns starfish densities at the pre-outbreak stage using an electrochemical biosensor. Biosens Bioelectron 2023; 230:115265. [PMID: 36996547 DOI: 10.1016/j.bios.2023.115265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/02/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023]
Abstract
The coral reef crisis has significantly intensified over the last decades, mainly due to severe outbreaks of crown-of-thorns starfish (COTS). Current ecological monitoring has failed to detect COTS densities at the pre-outbreak stage, thus preventing early intervention. In this work, we developed an effective electrochemical biosensor modified by a MoO2/C nanomaterial, as well as a specific DNA probe that could detect trace COTS environmental DNA (eDNA) at a lower detection limit (LOD = 0.147 ng/μL) with excellent specificity. The reliability and accuracy of the biosensor were validated against the standard methods by an ultramicro spectrophotometer and droplet digital PCR (p > 0.05). The biosensor was then utilized for the on-site analysis of seawater samples from SYM-LD and SY sites in the South China Sea. For the SYM-LD site suffering an outbreak, the COTS eDNA concentrations were 0.33 ng/μL (1 m, depth) and 0.26 ng/μL (10 m, depth), respectively. According to the ecological survey, the COTS density was 500 ind/hm2 at the SYM-LD site, verifying the accuracy of our measurements. At the SY site, COTS eDNA was also detected at 0.19 ng/μL, but COTS was not found by the traditional survey. Hence, larvae were possibly present in this region. Therefore, this electrochemical biosensor could be used to monitor COTS populations at the pre-outbreak stages, and potentially serve as a revolutionary early warning method. We will continue to improve this method for picomolar or even femtomolar detection of COTS eDNA.
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Affiliation(s)
- Liwei Wang
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China; School of Resources, Environment and Materials, Guangxi, Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Nanning, 530003, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519080, China
| | - Jiarong Xu
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China; School of Resources, Environment and Materials, Guangxi, Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Nanning, 530003, China
| | - Hongjie Liu
- School of Resources, Environment and Materials, Guangxi, Key Laboratory of Processing for Non-ferrous Metallic and Featured Materials, Nanning, 530003, China; School of Chemistry and Chemical Engineering, Guangxi University, Nanning, 530004, China; College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Shaopeng Wang
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China
| | - Wenchao Ou
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China
| | - Man Zhang
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China
| | - Fen Wei
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China
| | - Songlin Luo
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China
| | - Biao Chen
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China
| | - Shaolong Zhang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Kefu Yu
- School of Marine Sciences, Coral Reef Research Center of China, Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Guangxi University, Nanning, 530004, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, 519080, China.
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9
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Rogers AD, Appeltans W, Assis J, Ballance LT, Cury P, Duarte C, Favoretto F, Hynes LA, Kumagai JA, Lovelock CE, Miloslavich P, Niamir A, Obura D, O'Leary BC, Ramirez-Llodra E, Reygondeau G, Roberts C, Sadovy Y, Steeds O, Sutton T, Tittensor DP, Velarde E, Woodall L, Aburto-Oropeza O. Discovering marine biodiversity in the 21st century. ADVANCES IN MARINE BIOLOGY 2022; 93:23-115. [PMID: 36435592 DOI: 10.1016/bs.amb.2022.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
We review the current knowledge of the biodiversity of the ocean as well as the levels of decline and threat for species and habitats. The lack of understanding of the distribution of life in the ocean is identified as a significant barrier to restoring its biodiversity and health. We explore why the science of taxonomy has failed to deliver knowledge of what species are present in the ocean, how they are distributed and how they are responding to global and regional to local anthropogenic pressures. This failure prevents nations from meeting their international commitments to conserve marine biodiversity with the results that investment in taxonomy has declined in many countries. We explore a range of new technologies and approaches for discovery of marine species and their detection and monitoring. These include: imaging methods, molecular approaches, active and passive acoustics, the use of interconnected databases and citizen science. Whilst no one method is suitable for discovering or detecting all groups of organisms many are complementary and have been combined to give a more complete picture of biodiversity in marine ecosystems. We conclude that integrated approaches represent the best way forwards for accelerating species discovery, description and biodiversity assessment. Examples of integrated taxonomic approaches are identified from terrestrial ecosystems. Such integrated taxonomic approaches require the adoption of cybertaxonomy approaches and will be boosted by new autonomous sampling platforms and development of machine-speed exchange of digital information between databases.
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Affiliation(s)
- Alex D Rogers
- REV Ocean, Lysaker, Norway; Nekton Foundation, Begbroke Science Park, Oxford, United Kingdom.
| | - Ward Appeltans
- Intergovernmental Oceanographic Commission of UNESCO, Oostende, Belgium
| | - Jorge Assis
- Centre of Marine Sciences, University of Algarve, Faro, Portugal
| | - Lisa T Ballance
- Marine Mammal Institute, Oregon State University, Newport, OR, United States
| | | | - Carlos Duarte
- King Abdullah University of Science and Technology (KAUST), Red Sea Research Center (RSRC) and Computational Bioscience Research Center (CBRC), Thuwal, Kingdom of Saudi Arabia
| | - Fabio Favoretto
- Autonomous University of Baja California Sur, La Paz, Baja California Sur, Mexico
| | - Lisa A Hynes
- Nekton Foundation, Begbroke Science Park, Oxford, United Kingdom
| | - Joy A Kumagai
- Senckenberg Biodiversity and Climate Research Institute, Frankfurt am Main, Germany
| | - Catherine E Lovelock
- School of Biological Sciences, The University of Queensland, St Lucia, QLD, Australia
| | - Patricia Miloslavich
- Scientific Committee on Oceanic Research (SCOR), College of Earth, Ocean and Environment, University of Delaware, Newark, DE, United States; Departamento de Estudios Ambientales, Universidad Simón Bolívar, Venezuela & Scientific Committee for Oceanic Research (SCOR), Newark, DE, United States
| | - Aidin Niamir
- Senckenberg Biodiversity and Climate Research Institute, Frankfurt am Main, Germany
| | | | - Bethan C O'Leary
- Centre for Ecology & Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, United Kingdom; Department of Environment and Geography, University of York, York, United Kingdom
| | - Eva Ramirez-Llodra
- REV Ocean, Lysaker, Norway; Nekton Foundation, Begbroke Science Park, Oxford, United Kingdom
| | - Gabriel Reygondeau
- Yale Center for Biodiversity Movement and Global Change, Yale University, New Haven, CT, United States; Nippon Foundation-Nereus Program, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, BC, Canada
| | - Callum Roberts
- Centre for Ecology & Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, United Kingdom
| | - Yvonne Sadovy
- School of Biological Sciences, Swire Institute of Marine Science, The University of Hong Kong, Hong Kong
| | - Oliver Steeds
- Nekton Foundation, Begbroke Science Park, Oxford, United Kingdom
| | - Tracey Sutton
- Nova Southeastern University, Halmos College of Natural Sciences and Oceanography, Dania Beach, FL, United States
| | | | - Enriqueta Velarde
- Instituto de Ciencias Marinas y Pesquerías, Universidad Veracruzana, Veracruz, Mexico
| | - Lucy Woodall
- Nekton Foundation, Begbroke Science Park, Oxford, United Kingdom; Department of Zoology, University of Oxford, Oxford, United Kingdom
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