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Lee H, Depuydt S, Shin K, De Saeger J, Han T, Park J. Interactive Effects of Blue Light and Water Turbulence on the Growth of the Green Macroalga Ulva australis (Chlorophyta). Plants (Basel) 2024; 13:266. [PMID: 38256819 PMCID: PMC10820934 DOI: 10.3390/plants13020266] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/06/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024]
Abstract
Macroalgal growth and yield are key to sustainable aquaculture. Although light and water turbulence are two important factors that affect algal productivity, research on their interaction is limited. Therefore, in this study, we investigated the effects of different wavelengths of light and the presence or absence of water turbulence on the growth of the green macroalga Ulva australis. Water turbulence was found to enhance the growth of U. australis irrespective of photosynthetic performance, but only in blue light cultures. The quantum dose of blue light required to induce 50% growth promotion was 1.02 mol m-2, which is comparable to the reported values for cryptochrome-mediated effects in other macroalgae. The combined effect of blue light and water turbulence led to the accumulation of photosynthesis-related proteins that support plastid differentiation and facilitate efficient photosynthesis and growth. Our findings thus highlight the potential of harnessing blue light and water turbulence to maximise macroalgal cultivation for sustainable and profitable algal aquaculture.
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Affiliation(s)
- Hojun Lee
- Bio Environmental Science and Technology (BEST) Lab, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
| | - Stephen Depuydt
- Erasmus Brussels University of Applied Sciences and Arts, Nijverheidskaai 170, 1070 Brussels, Belgium
| | - Kisik Shin
- Water Environmental Engineering Research Division, National Institute of Environmental Research (NIER), 42, Hwangyeong-ro, Incheon 22689, Republic of Korea
| | - Jonas De Saeger
- Bio Environmental Science and Technology (BEST) Lab, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
| | - Taejun Han
- Bio Environmental Science and Technology (BEST) Lab, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
- Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653-Block F, B-9000 Gent, Belgium
| | - Jihae Park
- Bio Environmental Science and Technology (BEST) Lab, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
- Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653-Block F, B-9000 Gent, Belgium
- Center for Environmental and Energy Research, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
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Pineda-Alarcón L, Zuluaga M, RuÃz S, Mc Cann DF, Vélez F, Aguirre N, Puerta Y, Cañón J. Automated software for counting and measuring Hyalella genus using artificial intelligence. Environ Sci Pollut Res Int 2023; 30:123603-123615. [PMID: 37991613 PMCID: PMC10746779 DOI: 10.1007/s11356-023-30835-8] [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: 06/10/2023] [Accepted: 10/30/2023] [Indexed: 11/23/2023]
Abstract
Amphipods belonging to the Hyalella genus are macroinvertebrates that inhabit aquatic environments. They are of particular interest in areas such as limnology and ecotoxicology, where data on the number of Hyalella individuals and their allometric measurements are used to assess the environmental dynamics of aquatic ecosystems. In this study, we introduce HyACS, a software tool that uses a model developed with the YOLOv3's architecture to detect individuals, and digital image processing techniques to extract morphological metrics of the Hyalella genus. The software detects body metrics of length, arc length, maximum width, eccentricity, perimeter, and area of Hyalella individuals, using basic imaging capture equipment. The performance metrics indicate that the model developed can achieve high prediction levels, with an accuracy above 90% for the correct identification of individuals. It can perform up to four times faster than traditional visual counting methods and provide precise morphological measurements of Hyalella individuals, which may improve further studies of the species populations and enhance their use as bioindicators of water quality.
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Affiliation(s)
- Ludy Pineda-Alarcón
- Environmental Management and Modeling Group (GAIA), Environmental School, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia.
| | - Maycol Zuluaga
- Power Electronics, Automation, and Robotics Group (GEPAR), Engineer Electronic, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia
| | - Santiago RuÃz
- Power Electronics, Automation, and Robotics Group (GEPAR), Engineer Electronic, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia
| | - David Fernandez Mc Cann
- Power Electronics, Automation, and Robotics Group (GEPAR), Engineer Electronic, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia
| | - Fabio Vélez
- Limnology and Environmental Modeling Group (GEOLIMNA), Environmental School, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia
| | - Nestor Aguirre
- Limnology and Environmental Modeling Group (GEOLIMNA), Environmental School, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia
| | - Yarin Puerta
- Limnology and Environmental Modeling Group (GEOLIMNA), Environmental School, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia
| | - Julio Cañón
- Environmental Management and Modeling Group (GAIA), Environmental School, Engineer Faculty, Universidad de Antioquia, MedellÃn, Colombia
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Lee H, Kim G, Depuydt S, Shin K, Han T, Park J. Metal Toxicity across Different Thallus Sections of the Green Macroalga, Ulva australis. Toxics 2023; 11:548. [PMID: 37505514 PMCID: PMC10384764 DOI: 10.3390/toxics11070548] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/17/2023] [Accepted: 06/20/2023] [Indexed: 07/29/2023]
Abstract
We aimed to identify functional differences between different sections of the thallus of Ulva australis and develop tissue-endpoint combinations to assess the toxicity of six metals (i.e., Ag, As, Cd, Cr, Cu, and Ni). EC50 values for these metals in three sections of the thallus of Ulva were obtained for multiple endpoints: relative growth rate (RGR), chlorophyll a fluorescence, pigment contents, and the expression of the photosynthesis-related gene, rbcL. The responses of the endpoints varied across the respective thallus sections; overall, the most toxic metals were Ag and Cu. These endpoints were the best for evaluating metal toxicity: ETRmax of the middle thallus sections for Ag toxicity; RGR of the middle thallus section for As and Cd; ETRmax of the marginal thallus section for Cr; Chl b contents of the marginal thallus section for Cu; RGR of the basal thallus section for Ni. The EC50 values for the inhibition of ETRmax in middle (0.06 mg∙L-1) and Chl b in the marginal thallus sections (0.06 mg∙L-1) were all lower than those of the quality standard for wastewater discharge values of Ag and Cu in Republic of Korea and the US, pointing to the suitability of U. australis-based endpoints for risk assessment.
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Affiliation(s)
- Hojun Lee
- Bio Environmental Science and Technology (BEST) Lab, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
| | - Geonhee Kim
- Department of Marine Science, Incheon National University, 119, Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea
| | - Stephen Depuydt
- Erasmus Brussels University of Applied Sciences and Arts, Nijverheidskaai 170, 1070 Brussels, Belgium
| | - Kisik Shin
- Water Environmental Engineering Research Division, National Institute of Environmental Research (NIER), 42, Hwangyeong-ro, Incheon 22689, Republic of Korea
| | - Taejun Han
- Bio Environmental Science and Technology (BEST) Lab, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
- Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653-Block F, B-9000 Gent, Belgium
| | - Jihae Park
- Department of Animal Sciences and Aquatic Ecology, Ghent University, Coupure Links 653-Block F, B-9000 Gent, Belgium
- Centre for Environmental and Energy Research, Ghent University Global Campus, 119-5, Songdomunhwa-ro, Incheon 21985, Republic of Korea
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Lee H, Depuydt S, Choi S, Han T, Park J. Rapid toxicity assessment of six antifouling booster biocides using a microplate-based chlorophyll fluorescence in Undaria pinnatifida gametophytes. Ecotoxicology 2020; 29:559-570. [PMID: 32333251 DOI: 10.1007/s10646-020-02207-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
Biocides of antifouling agents can cause problems in marine ecosystems by damaging to non-target algal species. Aquatic bioassays are important means of assessing the quality of water containing mixtures of contaminants and of providing a safety standard for water management in an ecological context. In this study, a rapid, sensitive and inexpensive test method was developed using free-living male and female gametophytes of the brown macroalga Undaria pinnatifida. A conventional fluorometer was employed to evaluate the acute (48 h) toxic effects of six antifouling biocides: 4,5-Dichloro-2-octyl-isothiazolone (DCOIT), diuron, irgarol, medetomidine, tolylfluanid, zinc pyrithione (ZnPT). The decreasing toxicity in male and female gametophytes as estimated by EC50 (effective concentration at which 50% inhibition occurs) values was: diuron (0.037 and 0.128 mg l-1, respectively) > irgarol (0.096 and 0.172 mg l-1, respectively) > tolylfluanid (0.238 and 1.028 mg l-1, respectively) > DCOIT (1.015 and 0.890 mg l-1, respectively) > medetomidine (12.032 and 12.763 mg l-1, respectively). For ZnPT, 50% fluorescence inhibition of U. pinnatifida gametophytes occurred at concentrations above 0.4 mg l-1. The Undaria method is rapid, simple, practical, and cost-effective for the detection of photosynthesis-inhibiting biocides, thus making a useful tool for testing the toxicity of antifouling agents in marine environments.
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Affiliation(s)
- Hojun Lee
- Department of Marine Science, Incheon National University, 119, Academy-ro, Yeonsu-gu, Incheon, 22012, Republic of Korea
- Ghent University Global Campus, 119-5, Songdomunhwa-ro, Yeonsu-gu, Incheon, 21985, Republic of Korea
| | - Stephen Depuydt
- Ghent University Global Campus, 119-5, Songdomunhwa-ro, Yeonsu-gu, Incheon, 21985, Republic of Korea
| | - Soyeon Choi
- Department of Marine Science, Incheon National University, 119, Academy-ro, Yeonsu-gu, Incheon, 22012, Republic of Korea
| | - Taejun Han
- Department of Marine Science, Incheon National University, 119, Academy-ro, Yeonsu-gu, Incheon, 22012, Republic of Korea
- Ghent University Global Campus, 119-5, Songdomunhwa-ro, Yeonsu-gu, Incheon, 21985, Republic of Korea
| | - Jihae Park
- Ghent University Global Campus, 119-5, Songdomunhwa-ro, Yeonsu-gu, Incheon, 21985, Republic of Korea.
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