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Articles de revues sur le sujet « Algal overgrowth »

Auteur : Grafiati

Publié le 9 mars 2023

Mis à jour le 31 juillet 2025

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1

Kim, Gwang Soo, Yeonghwa Gwon, Eun Ji Oh, Dongsu Kim, Jae Hyun Kwon, and Young Do Kim. "Classification Technique of Algae Using Hyperspectral Images of Algae Culture Media." Applied Sciences 13, no. 7 (2023): 4631. http://dx.doi.org/10.3390/app13074631.

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Increases in algal growth have been reported in rivers, reservoirs, and other water resources worldwide, including Korea. Algal overgrowth can result in algal bloom, which has several negative impacts, such as ecosystem degradation and economic losses. Mitigation measures employed in Korea include an algal warning system and survey-based water quality forecast systems. However, these methods are time-consuming and require sample collection from the site. On the other hand, remote sensing techniques that use chlorophyll a are unable to distinguish between different types of algal species. In th

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Claar, D. C., and M. Takabayashi. "The effects of growth anomaly on susceptibility of Montipora capitata to turf algal overgrowth." Marine and Freshwater Research 67, no. 5 (2016): 666. http://dx.doi.org/10.1071/mf14200.

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One of the most prominent coral diseases in Hawai‘i is growth anomaly (GA) of the skeleton. GA reduces key biological functions of Montipora capitata, but the effect of this disease on the ecological competitiveness of the coral has not been investigated. This study evaluated the effect of the GA on the susceptibility of an endemic Hawaiian coral M. capitata to algal overgrowth at Wai‘ōpae, Hawai‘i. Field surveys and photo analyses were conducted to collect epizootiological data. A relationship was found between GA severity and turf algal growth at the colony level; however, this relationship

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Eich, Andreas, Amanda K. Ford, Maggy M. Nugues, Ryan S. McAndrews, Christian Wild, and Sebastian C. A. Ferse. "Positive association between epiphytes and competitiveness of the brown algal genus Lobophora against corals." PeerJ 7 (February 8, 2019): e6380. http://dx.doi.org/10.7717/peerj.6380.

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Observations of coral–algal competition can provide valuable information about the state of coral reef ecosystems. Here, we report contact rates and apparent competition states for six shallow lagoonal reefs in Fiji. A total of 81.4% of examined coral perimeters were found to be in contact with algae, with turf algae (54.7%) and macroalgae of the genus Lobophora (16.8%) representing the most frequently observed contacts. Turf algae competitiveness was low, with 21.8% of coral–turf contacts being won by the algae (i.e. overgrowth or bleaching of coral tissue). In contrast, Lobophora competitive

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Coll, J. C., I. R. Price, G. M. K�nig, and B. F. Bowden. "Algal overgrowth of alcyonacean soft corals." Marine Biology 96, no. 1 (1987): 129–35. http://dx.doi.org/10.1007/bf00394846.

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Lu, Chunrong, Qi Zhang, Qinyu Huang, et al. "Significant Shifts in Microbial Communities Associated with Scleractinian Corals in Response to Algae Overgrowth." Microorganisms 10, no. 11 (2022): 2196. http://dx.doi.org/10.3390/microorganisms10112196.

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Microbes play a key role in reef dynamics, mediating the competition between scleractinian corals and benthic algae; however, major shifts in bacterial communities among coral species in response to increases in the abundance of algae are not well understood. We investigated the taxonomic composition of coral-associated microbial communities under algae-overgrowth conditions using 16S rRNA gene sequencing. The results showed that non-algal (i.e., healthy) tissue (HH) had lower bacterial abundance and diversity than tissue collected from the coral–algae interface boundary (HA) and areas of alga

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Jorissen, Hendrikje, Christina Skinner, Ronald Osinga, Dirk de Beer, and Maggy M. Nugues. "Evidence for water-mediated mechanisms in coral–algal interactions." Proceedings of the Royal Society B: Biological Sciences 283, no. 1836 (2016): 20161137. http://dx.doi.org/10.1098/rspb.2016.1137.

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Although many coral reefs have shifted from coral-to-algal dominance, the consequence of such a transition for coral–algal interactions and their underlying mechanisms remain poorly understood. At the microscale, it is unclear how diffusive boundary layers (DBLs) and surface oxygen concentrations at the coral–algal interface vary with algal competitors and competitiveness. Using field observations and microsensor measurements in a flow chamber, we show that coral (massive Porites ) interfaces with thick turf algae, macroalgae, and cyanobacteria, which are successful competitors against coral i

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Picken, Gordon B. "Moray Firth marine fouling communities." Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences 91 (1986): 213–20. http://dx.doi.org/10.1017/s0269727000009313.

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SynopsisFouling communities typical of shallow water inshore sites were found at three locations in the Moray Firth. At each, an initial background cover of solitary tubeworms and barnacles was overgrown by secondary fouling organisms. On the piles of Nigg jetty, overgrowth consisted of mussels in the depth range 0–6 m and hydroids, sponges, soft corals and anemones from 6–26 m. Buoys in the approaches to Cromarty Firth were completely covered by a mixture of algae and mussels. Sunlit areas of the float cleaned annually bore a diverse algal cover, whereas uncleaned shaded areas and the freely

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Bahri, Syamsul, Pranu Arisanto, Suhardi Suhardi, and Wildan Herwindo. "Pengembangan Awal Alat Pemanen Alga Sistem Rotating Filtered-Drum Untuk Perbaikan Kualitas Air di Perairan Tergenang." Jurnal Inovasi Konstruksi 2, no. 2 (2023): 88–94. http://dx.doi.org/10.56911/jik.v2i2.76.

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The phenomenon of overgrowth of green algae and cyanobacteria indicates a serious aquatic environmental problem from eutrophication. In aquatic ecosystems, algae are an integral part of the ecological system. But when there is abundant algae growth in the waters it causes the phenomenon of harmful alga blooms. Algae that were previously invisible, due to clumping, this group becomes invisible to the eye. The follow-up impact of the algae blooms is fish death, due to lack of oxygen at night. Algal masses that are swept by the wind onto the shores of bays and reservoir shores cause buildup and d

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Buriyo1, Amelia S., Nyatwere D. Mganga, and Mary Melchiory. "The Effects of Algal Blooms on Oxygen Levels in Lakes Babati and Eyasi, Tanzania." Tanzania Journal of Science 50, no. 1 (2024): 36–47. http://dx.doi.org/10.4314/tjs.v50i1.3.

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Globally aquatic ecosystems are reportedly overwhelmed by algal blooms due to excessive deposition of nutrients which ultimately cause hypoxia, leading to massive fish death. This study aimed at assessing the relationship between algae contents and dissolved oxygen (DO) in Lake Babati which is threatened by anthropogenic activities, whereas Lake Eyasi was used as a control. Algae contents (chlorophyll a), DO and surface water temperature were measured using standard methods. Results revealed that the mean algae content was significantly higher (4.47±0.88 mg/L) in Lake Babati than in Lake Eyasi

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Zhao, Qianming, Ruitong Jiang, Yuxin Shi, Anglu Shen, Peimin He, and Liu Shao. "Allelopathic Inhibition and Mechanism of Quercetin on Microcystis aeruginosa." Plants 12, no. 9 (2023): 1808. http://dx.doi.org/10.3390/plants12091808.

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The utilization of allelochemicals to inhibit algal overgrowth is a promising approach for controlling harmful algal blooms (HABs). Quercetin has been found to have an allelopathic effect on algae. However, its responsive mechanism needs to be better understood. In the present study, the inhibitory effects of different quercetin concentrations on M. aeruginosa were evaluated, and the inhibition mechanisms were explored. The results demonstrated that quercetin significantly inhibited M. aeruginosa growth, and the inhibitory effect was concentration-dependent. The inhibition rate of 40 mg L−1 qu

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Jia, Yan, Zhiyu Xiao, Liwen Yang, et al. "Enhancing Algal Bloom Level Monitoring with CYGNSS and Sentinel-3 Data." Remote Sensing 16, no. 20 (2024): 3915. http://dx.doi.org/10.3390/rs16203915.

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Algal blooms, resulting from the overgrowth of algal plankton in water bodies, pose significant environmental problems and necessitate effective remote sensing methods for monitoring. In recent years, Global Navigation Satellite System–Reflectometry (GNSS-R) has rapidly advanced and made notable contributions to many surface observation fields, providing new means for identifying algal blooms. Additionally, meteorological parameters such as temperature and wind speed, key factors in the occurrence of algal blooms, can aid in their identification. This paper utilized Cyclone GNSS (CYGNSS) data,

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Sajid, Mohammad, Arvind Kumar Misra, and Ahmed S. Almohaimeed. "Modeling the role of fish population in mitigating algal bloom." Electronic Research Archive 32, no. 10 (2024): 5819–45. http://dx.doi.org/10.3934/era.2024269.

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<p>Algal blooms pose a significant threat to the ecological integrity and biodiversity in aquatic ecosystems. In lakes, enriched with nutrients, these blooms result in overgrowth of periphyton, leading to biological clogging, oxygen depletion, and ultimately a decline in ecosystem's health and water quality. In this article, we presented a mathematical model centered around the role of aquatic species (specifically fish population) to alleviate algal blooms. The model analysis revealed significant shifts in dynamics, shedding light on the effectiveness of fish-mediated sustainability str

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Wolf, Alexander T., and Maggy M. Nugues. "Synergistic effects of algal overgrowth and corallivory on Caribbean reef-building corals." Ecology 94, no. 8 (2013): 1667–74. http://dx.doi.org/10.1890/12-0680.1.

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Wu, Liming, Huijun Wu, Lina Chen, et al. "Bacilysin from Bacillus amyloliquefaciens FZB42 Has Specific Bactericidal Activity against Harmful Algal Bloom Species." Applied and Environmental Microbiology 80, no. 24 (2014): 7512–20. http://dx.doi.org/10.1128/aem.02605-14.

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ABSTRACTHarmful algal blooms, caused by massive and exceptional overgrowth of microalgae and cyanobacteria, are a serious environmental problem worldwide.In the present study, we looked forBacillusstrains with sufficiently strong anticyanobacterial activity to be used as biocontrol agents. Among 24 strains,Bacillus amyloliquefaciensFZB42 showed the strongest bactericidal activity againstMicrocystis aeruginosa, with a kill rate of 98.78%. The synthesis of the anticyanobacterial substance did not depend on Sfp, an enzyme that catalyzes a necessary processing step in the nonribosomal synthesis of

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Zhen, Yinqing, and Qingyun Yan. "Improving Spaceborne GNSS-R Algal Bloom Detection with Meteorological Data." Remote Sensing 15, no. 12 (2023): 3122. http://dx.doi.org/10.3390/rs15123122.

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Algal bloom has become a serious environmental problem caused by the overgrowth of plankton in many waterbodies, and effective remote sensing methods for monitoring it are urgently needed. Global navigation satellite system-reflectometry (GNSS-R) has been developed rapidly in recent years, which offers a new perspective on algal bloom detection. When algal bloom emerges, the water surface will turn smoother, which can be detected by GNSS-R. In addition, meteorological parameters, such as temperature, wind speed and solar radiation, are generally regarded as the key factors in the formation of

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Williams, Claire, Debbie-Ann Gordon-Smith, and Pearl Bergan. "Community Abundance and Environmental Monitoring to Support Coral Reef Management in East Portland Special Fishery Conservation Area, Jamaica." Bulletin of the Florida Museum of Natural History 60, no. 2 (2023): 127. http://dx.doi.org/10.58782/flmnh.iitn6005.

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Global warming and human impacts continue to be devastating for coral reef systems. Jamaican reefs have been adversely affected by a variety of threats including hurricanes, coral bleaching, disease, and algal overgrowth, the impact of which has been exacerbated by global climate change, overfishing, and urchin disease. Despite the dire situation, with proper protection, algal coral phase shifts can be reversed. One area that is being protected is the East Portland Special Fishery Conservation Area (EPSFCA). The EPSFCA is monitored by the Alligator Head Foundation (AHF), which houses a coral n

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Chemello, Silvia, Isabel Sousa Pinto, and Tania R. Pereira. "Optimising Kelp Cultivation to Scale up Habitat Restoration Efforts: Effect of Light Intensity on “Green Gravel” Production." Hydrobiology 2, no. 2 (2023): 347–53. http://dx.doi.org/10.3390/hydrobiology2020022.

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Kelp forests are disappearing worldwide due to climate change and human stressors, highlighting the need for active interventions. A new restoration approach, “green gravel”, has been shown to be a potentially effective tool to restore endangered kelp forests. However, green gravel is still a novel technique that needs better experimentation and optimisation at all process stages. Contamination by other algal species is one of the critical factors in early-stage green gravel production because their overgrowth can lead to the loss of the seeded material. In this study, we assessed the effect o

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Diaz-Pulido, Guillermo, Laurence J. McCook, Sophie Dove, et al. "Doom and Boom on a Resilient Reef: Climate Change, Algal Overgrowth and Coral Recovery." PLoS ONE 4, no. 4 (2009): e5239. http://dx.doi.org/10.1371/journal.pone.0005239.

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Airoldi, Laura. "EFFECTS OF DISTURBANCE, LIFE HISTORIES, AND OVERGROWTH ON COEXISTENCE OF ALGAL CRUSTS AND TURFS." Ecology 81, no. 3 (2000): 798–814. http://dx.doi.org/10.1890/0012-9658(2000)081[0798:eodlha]2.0.co;2.

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Das, Rocktim Ramen, Chemmencheri Ramakrishnan Sreeraj, Gopi Mohan, et al. "Evidence of Coral Diseases, Phase Shift, and Stressors in the Atolls of Lakshadweep Islands, Arabian Sea—With Geographical Notes on Their Occurrence within the Indian EEZ and Contiguous International Waters." Diversity 15, no. 3 (2023): 382. http://dx.doi.org/10.3390/d15030382.

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Photographic evidence of some important coral diseases (black band disease, black disease/Terpios hoshinota, white syndrome, pink line syndrome, pink spots, invertebrate galls, skeletal growth anomalies, tissue loss), coral competing sponges, and coral–algal phase shifts (competitive overgrowth of the seaweed Caulerpa spp. over corals and competitive scleractinian interactions such as with Halimeda spp.) have been collected during field observations in a few atolls within the Lakshadweep archipelago, Arabian Sea. Further, earlier reports of similar diseases and other stressors within the India

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Wakwella, Ama, Peter J. Mumby, and George Roff. "Sedimentation and overfishing drive changes in early succession and coral recruitment." Proceedings of the Royal Society B: Biological Sciences 287, no. 1941 (2020): 20202575. http://dx.doi.org/10.1098/rspb.2020.2575.

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Sedimentation and overfishing are important local stressors on coral reefs that can independently result in declines in coral recruitment and shifts to algal-dominated states. However, the role of herbivory in driving recovery across environmental gradients is often unclear. Here we investigate early successional benthic communities and coral recruitment across a sediment gradient in Palau, Micronesia over a 12-month period. Total sedimentation rates measured by ‘TurfPods’ varied from 0.03 ± 0.1 SE mg cm −2 d −1 at offshore sites to 1.32 ± 0.2 mg cm −2 d −1 at inshore sites. To assess benthic

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Kim, Y., D. R. Lee, and D. Giokas. "Agricultural reuse of the secondary effluent polished by an algal pond system coupled with constructed wetland." Water Science and Technology 50, no. 6 (2004): 79–86. http://dx.doi.org/10.2166/wst.2004.0362.

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In this paper, reuse potentials of the secondary effluents as irrigation water was evaluated through field sampling trips. Water quality parameters significantly deviating from its guidelines were Total coliform bacteria and organic matter. Even though nutrients are not regulated in Korea, their removal would be required because they have been a barrier for secondary effluent irrigation through governmental intervention. The results of treatment study with aquatic ponds show that in spite of its poor biodegradability, organic matter in soluble form was reduced by 20% during 10 days of HRT. On

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Ho, Long T., Duy T. Pham, Wout Van Echelpoel, et al. "Exploring the influence of meteorological conditions on the performance of a waste stabilization pond at high altitude with structural equation modeling." Water Science and Technology 78, no. 1 (2018): 37–48. http://dx.doi.org/10.2166/wst.2018.254.

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Abstract Algal photosynthesis plays a key role in the removal mechanisms of waste stabilization ponds (WSPs), which is indicated in the variations of three parameters, dissolved oxygen, pH, and chlorophyll a. These variations can be considerably affected by extreme climatic conditions at high altitude. To investigate these effects, three sampling campaigns were conducted in a high-altitude WSP in Cuenca (Ecuador). From the collected data, the first application of structure equation modeling (SEM) on a pond system was fitted to analyze the influence of high-altitude characteristics on pond perf

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Tang, Yongtao, Chen Wang, Hanjun Jiang, et al. "Grazing Effects of Xenocypris davidi Bleeker (Cyprinidae, Cypriniformes) on Filamentous Algae and the Consequent Effects on Intestinal Microbiota." Aquaculture Research 2023 (May 27, 2023): 1–14. http://dx.doi.org/10.1155/2023/1985865.

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Filamentous algae are present in seawater and freshwater ecosystems worldwide. Their growth poses a serious threat to water environments and fishery production, especially Chinese mitten crab and red swamp crayfish culturing. To explore safe and ecological treatment methods, we comparatively studied the grazing effects of Xenocypris davidi Bleeker on Cladophora (one species) and Spirogyra (two species) in indoor glass tanks and examined the intestinal microbiota related to digestion and absorption. The results showed that the fish was more receptive to Spirogyra than to Cladophora, and the int

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Nezbrytska, Inna, Oleg Usenko, Igor Konovets, et al. "Potential Use of Aquatic Vascular Plants to Control Cyanobacterial Blooms: A Review." Water 14, no. 11 (2022): 1727. http://dx.doi.org/10.3390/w14111727.

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Intense “blooming” of cyanobacteria (blue-green algae) caused by eutrophication and climate change poses a serious threat to freshwater ecosystems and drinking water safety. Preventing the proliferation of cyanobacteria and reducing water nutrient load is a priority for the restoration of eutrophic water bodies. Aquatic plants play an important role in the function and structure of aquatic ecosystems, affecting the physiochemistry of the water and bottom sediments, primary production, and biotic interactions that support a balanced ecosystem. This review examines the inhibitory effect of aquat

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Olena, Bilous, Nezbrytska Inna, Zhezherya Vladyslav, et al. "Interactions between Aquatic Plants and Cyanobacterial Blooms in Freshwater Reservoir Ecosystems." Water 15, no. 4 (2023): 672. http://dx.doi.org/10.3390/w15040672.

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Climate change and nutrient pollution are echoed by worldwide increasing trends in the frequency, duration, and toxicity of cyanobacterial (blue-green algal) blooms. Therefore, searching for the best options to mitigate blooms is relevant and timely. Aquatic vascular plants offer a promising solution through biological control. In this study, we use reservoirs regularly affected by intensive blooms (the Kyiv and Kaniv Reservoirs of the Dnipro River, Ukraine) to investigate whether macrophytes may inhibit or reduce the massive development of cyanobacteria. Special attention was paid to plants w

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Pacheco, Diana, Glacio Souza Araújo, João Cotas, Rui Gaspar, João M. Neto, and Leonel Pereira. "Invasive Seaweeds in the Iberian Peninsula: A Contribution for Food Supply." Marine Drugs 18, no. 11 (2020): 560. http://dx.doi.org/10.3390/md18110560.

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The introduction of exotic organisms in marine ecosystems can lead to economic and ecological losses. Globally, seaweeds represent a significant part of these non-indigenous species (NIS), with 407 introduced algal species. Furthermore, the presence of NIS seaweeds has been reported as a major concern worldwide since the patterns of their potential invasion mechanisms and vectors are not yet fully understood. Currently, in the Iberian Peninsula, around 50 NIS seaweeds have been recorded. Some of these are also considered invasive due to their overgrowth characteristic and competition with othe

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Barrows, Andrew R., Joshua R. Hancock, David L. Cohen, et al. "Enhancing survivorship and growth of juvenile Montipora capitata using the Hawaiian collector urchin Tripneustes gratilla." PeerJ 11 (September 27, 2023): e16113. http://dx.doi.org/10.7717/peerj.16113.

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The biodiversity of coral reef habitats is rapidly declining due to the effects of anthropogenic climate change, prompting the use of active restoration as a mitigation strategy. Sexual propagation can maintain or enhance genetic diversity in restoration of these ecosystems, but these approaches suffer from a range of inefficiencies in rearing and husbandry. Algal overgrowth of juveniles is a major bottleneck in the production of sexually propagated corals that may be alleviated by co-culture with herbivores. We reared juvenile Montipora capitata alongside juvenile native Hawaiian collector ur

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Kang, Donhyug, Byoung Kweon Kim, Seung Won Jung, et al. "Development and Application of an Integrated System for the Detection and Prediction of Harmful Algal Blooms in Korea." Journal of Marine Science and Engineering 11, no. 12 (2023): 2207. http://dx.doi.org/10.3390/jmse11122207.

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Harmful algal blooms (HABs) are types of phytoplankton overgrowth that adversely affect marine ecosystems and aquaculture resources. One such HAB species, Cochlodinium polykrikoides, occurs irregularly and causes significant damage to the aquaculture industry along the coastal regions of Korea. In this study, we developed and implemented an integrated system to detect and predict HAB occurrences in real time. This system comprises four main components: (1) a real-time detection system utilizing acoustic sensing, ocean weather, water temperature, salinity, and chlorophyll, satellite images, gen

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Zhang, Shanshan, Xiaoqi He, Lei Cao, Yigang Tong, Baohua Zhao, and Wenlin An. "A Novel Wide-Range Freshwater Cyanophage MinS1 Infecting the Harmful Cyanobacterium Microcystis aeruginosa." Viruses 14, no. 2 (2022): 433. http://dx.doi.org/10.3390/v14020433.

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Microcystis aeruginosa, as one of the major players in algal bloom, produces microcystins, which are strongly hepatotoxic, endangering human health and damaging the ecological environment. Biological control of the overgrowth of Microcystis with cyanophage has been proposed to be a promising solution for algal bloom. In this study, a novel strain of Microcystis cyanophage, MinS1, was isolated. MinS1 contains an icosahedral head approximately 54 nm in diameter and a 260 nm-long non-contractile tail. The phage genome consists of a linear, double-stranded 49,966 bp DNA molecule, which shares very

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Montano, Simone, Simone Fattorini, Valeriano Parravicini, et al. "Corals hosting symbiotic hydrozoans are less susceptible to predation and disease." Proceedings of the Royal Society B: Biological Sciences 284, no. 1869 (2017): 20172405. http://dx.doi.org/10.1098/rspb.2017.2405.

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In spite of growing evidence that climate change may dramatically affect networks of interacting species, whether—and to what extent—ecological interactions can mediate species' responses to disturbances is an open question. Here we show how a largely overseen association such as that between hydrozoans and scleractinian corals could be possibly associated with a reduction in coral susceptibility to ever-increasing predator and disease outbreaks. We examined 2455 scleractinian colonies (from both Maldivian and the Saudi Arabian coral reefs) searching for non-random patterns in the occurrence o

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Sordo, Laura, and Paulo Lana. "Temporal variations of Halodule wrightii meadows and associated fauna near their southern distribution limit in the southwestern Atlantic." Botanica Marina 63, no. 3 (2020): 215–28. http://dx.doi.org/10.1515/bot-2018-0106.

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AbstractHalodule wrightii meadows in Southern Brazil have been regressing in an unsheltered area of the subtropical Paranaguá Bay, near their southern limit in the SW Atlantic, since 2006. To identify early indicators of regression events, we assessed variations in plant and macrobenthic structure in two local meadows under unsheltered and protected conditions. Differences between sites increased after an epiphytic overgrowth of the alga Hincksia mitchelliae at the unsheltered site. Seagrass growth was suppressed and the numbers of burrowing and opportunistic benthic species increased with the

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Mazur, Robert, Mateusz Jakubiak, and Luís Santos. "Environmental Factors Affecting the Efficiency of Water Reservoir Restoration Using Microbiological Biotechnology." Sustainability 16, no. 1 (2023): 266. http://dx.doi.org/10.3390/su16010266.

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Aquatic ecosystems are often subject to degradation due to various environmental stressors. The accumulation of an organic sediment layer causes shallowing, algal blooms, and hypertrophy in water reservoirs. The processes of overgrowth and shallowing lead to a reduction in the ecosystem services provided by the reservoir as well as potentially causing the disappearance of the water body. To address these challenges and restore the ecological balance of water reservoirs, effective and sustainable revitalisation methods are essential. In recent years, biotechnological approaches, particularly ut

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Cho, Yong-Chul, Ho-Yeong Kang, Ju-Yeon Son, Taegu Kang, and Jong-Kwon Im. "The Spatiotemporal Eutrophication Status and Trends in the Paldang Reservoir, Republic of Korea." Sustainability 16, no. 1 (2023): 373. http://dx.doi.org/10.3390/su16010373.

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The Paldang Reservoir (PDR), the largest artificial lake in the Republic of Korea, has recently experienced increased chemical oxygen demand (COD), eutrophication, and algal blooms due to climate change. This study aimed to analyze the hydrological characteristics and water quality of the PDR and assess its spatial and seasonal eutrophication status changes using the Korean-type trophic quality index (TSIKO) and the seasonal Mann–Kendall Test (SMK). The PDR’s water was graded “good” in terms of biochemical oxygen demand (BOD) and “fair” for COD, total phosphorous (TP), and chlorophyll-a (Chl-a

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Hsieh, Hao-Yu, Ping-Wei Liou, Shaobo Yang, et al. "Behaviors of AlGaN Strain Relaxation on a GaN Porous Structure Studied with d-Spacing Crystal Lattice Analysis." Nanomaterials 13, no. 10 (2023): 1617. http://dx.doi.org/10.3390/nano13101617.

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The high porosity of a GaN porous structure (PS) makes it mechanically semi-flexible and can shield against the stress from the thick growth template on an overgrown layer to control the lattice structure or composition within the overgrown layer. To understand this stress shield effect, we investigated the lattice constant variations among different growth layers in various samples of overgrown Al0.3Ga0.7N on GaN templates under different strain-relaxation conditions based on d-spacing crystal lattice analysis. The fabrication of a strain-damping PS in a GaN template shields against the stres

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Seveso, Davide, Simone Montano, Giovanni Strona, Ivan Orlandi, Marina Vai, and Paolo Galli. "Up-regulation of Hsp60 in response to skeleton eroding band disease but not by algal overgrowth in the scleractinian coral Acropora muricata." Marine Environmental Research 78 (July 2012): 34–39. http://dx.doi.org/10.1016/j.marenvres.2012.03.008.

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Olinger, LK, A. Chaves-Fonnegra, IC Enochs, and ME Brandt. "Three competitors in three dimensions: photogrammetry reveals rapid overgrowth of coral during multispecies competition with sponges and algae." Marine Ecology Progress Series 657 (January 7, 2021): 109–21. http://dx.doi.org/10.3354/meps13579.

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Competition for limited space is an important driver of benthic community structure on coral reefs. Studies of coral-algae and coral-sponge interactions often show competitive dominance of algae and sponges over corals, but little is known about the outcomes when these groups compete in a multispecies context. Multispecies competition is increasingly common on Caribbean coral reefs as environmental degradation drives loss of reef-building corals and proliferation of alternative organisms such as algae and sponges. New methods are needed to understand multispecies competition, whose outcomes ca

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Patel, Ruchit, Aline de Oliveira, Robert Newby, and Tinchun Chu. "Flow Cytometric Analysis of Freshwater Cyanobacteria: A Case Study." Water 11, no. 7 (2019): 1422. http://dx.doi.org/10.3390/w11071422.

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Eutrophication is a process that occurs due to the excessive accumulation of nutrients, primarily nitrogen and phosphorus, from natural and anthropogenic sources. This phenomenon causes cyanobacterial overgrowth, which over time leads to cyanobacterial harmful algal blooms (CHABs) that affect public drinking water sources and water sites with recreational usage. The rapid detection of bloom-forming cyanobacteria in freshwater bodies is critical in order to implement prevention strategies. Cyanobacteria contain phycobiliproteins such as phycoerythrin and allophycocyanin as part of the phycobili

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avi, Pall, and Sushma Kumari. "Eutrophication: Understanding and Mitigating Eutrophication in Pond Water." International Journal of Current Microbiology and Applied Sciences 13, no. 11 (2024): 21–25. https://doi.org/10.20546/ijcmas.2024.1311.003.

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Eutrophication, the excessive enrichment of water bodies with nutrients, is a pervasive environmental issue with far-reaching ecological, economic, and social consequences. Eutrophication, often termed as the 'silent menace' of aquatic ecosystems, is a process with profound environmental implications. It occurs when excessive nutrients, typically nitrogen and phosphorus, accumulate in water bodies, stimulating the overgrowth of algae and aquatic plants. As these organisms flourish, they deplete oxygen levels in the water, leading to detrimental consequences for aquatic life. This phenomenon, t

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Work, TM, E. Millard, DB Mariani, et al. "Cytology reveals diverse cell morphotypes and cellin-cell interactions in normal collector sea urchins Tripneustes gratilla." Diseases of Aquatic Organisms 142 (November 19, 2020): 63–73. http://dx.doi.org/10.3354/dao03533.

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Echinoderms such as sea urchins are important in marine ecosystems, particularly as grazers, and unhealthy sea urchins can have important ecological implications. For instance, unexplained mortalities of Diadema antillarum in the Caribbean were followed by algal overgrowth and subsequent collapse of coral reef ecosystems. Unfortunately, few tools exist to evaluate echinoderm health, making management of mortalities or other health issues problematic. Hematology is often used to assess health in many animal groups, including invertebrates, but is seldom applied to echinoderms. We used a standar

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Khosrovyan, Alla, Rima Avalyan, Anahit Atoyants, et al. "Tradescantia-Based Test Systems Can Be Used for the Evaluation of the Toxic Potential of Harmful Algal Blooms." Water 15, no. 13 (2023): 2500. http://dx.doi.org/10.3390/w15132500.

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Harmful algal blooms (HABs) are overgrowths of toxic strains of algae (diatoms, green) and cyanobacteria (blue-green algae). While occurring naturally, human-induced environmental changes have resulted in more frequent occurrences of such blooms worldwide. Meantime, the ecotoxicological risk of HABs is rarely evaluated by means of standard test methods. For the first time, the genotoxic potential of the HAB event 2020 was assessed using two different Tradescantia-based test systems (Trad-SHM and Trad-MN, 24-h exposure). An integrated analysis of biological (algal abundance) and ecotoxicologica

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Fernández, Joaquín Alejandro Hernández, and Jose Alfonso Prieto Palomo. "Synthesis and Characterization of MAPTAC-Modified Cationic Corn Starch: An Integrated DFT-Based Experimental and Theoretical Approach for Wastewater Treatment Applications." Journal of Composites Science 9, no. 5 (2025): 240. https://doi.org/10.3390/jcs9050240.

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Phosphorus contamination in water bodies is a major contributor to eutrophication, leading to algal overgrowth, oxygen depletion, and ecological imbalance. Conventional treatment methods, including chemical precipitation and synthetic adsorbents, are often limited by high operational costs, low biodegradability, and secondary pollutant generation. In this study, a cationic starch was synthesized through free radical graft polymerization of 3-methacrylamoylaminopropyl trimethyl ammonium chloride (MAPTAC) onto corn starch. The modified polymer exhibited a high degree of substitution (DS = 1.24),

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Nakamura, Shuji. "InGaN/GaN/AlGaN-based laser diodes grown on epitaxially laterally overgrown GaN." Journal of Materials Research 14, no. 7 (1999): 2716–31. http://dx.doi.org/10.1557/jmr.1999.0365.

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Epitaxially laterally overgrown GaN on sapphire was used to reduce the number of threading dislocations originating from the interface of the GaN epilayer with the sapphire substrate. The GaN layer above the SiO2 mask area surrounding the window and corresponding to the lateral overgrowth was nearly free of threading dislocations. A high density of threading dislocations was observed in the vicinity of GaN grown in the window regions. InGaN multiquantum well-structure laser diodes (LDs) grown on pure GaN substrates, which were fabricated by removing the sapphire substrate, were demonstrated. T

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Setiabudi, Gede Iwan, Dietriech G. Bengen, Ocky Karna Radjasa, and Hefni Effendi. "Preliminary study of algasidal activities of the episymbiont bacterial consortium from Enhalus acoroides." Advances in Tropical Biodiversity and Environmental Sciences 2, no. 2 (2018): 21. http://dx.doi.org/10.24843/atbes.2018.v02.i02.p02.

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Seagrass symbiotic bacteria have various functions, one of which is as algaside. There are 2 types of symbionts namely endosymbiont and episymbiont. This study aims to test the initial activity of algaside episymbiont Enhalus acoroides on diatome and dinoflagellate group plankton. The method used for testing is Mixed Algal-bacterial cultures. On media that has been overgrown with algae will be inoculated with episymbiont bacterial consortium E. acoroides. The results of the bacterial consortium research have not shown significant algaside activity. But, on Nitschia sp. showed significant algas

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Lazarev, S., M. Barchuk, S. Bauer, et al. "Study of threading dislocation density reduction in AlGaN epilayers by Monte Carlo simulation of high-resolution reciprocal-space maps of a two-layer system." Journal of Applied Crystallography 46, no. 1 (2012): 120–27. http://dx.doi.org/10.1107/s0021889812043051.

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High-resolution X-ray diffraction in coplanar and noncoplanar geometries has been used to investigate the influence of an SiNxnano-mask in the reduction of the threading dislocation (TD) density of high-quality AlGaN epitaxial layers grown on sapphire substrates. Our developed model, based on a Monte Carlo method, was applied to the simulation of the reciprocal-space maps of a two-layer system. Good agreement was found between the simulation and the experimental data, leading to an accurate determination of the dislocation densities as a function of the overgrowth layer thickness. The efficien

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Martín-Closas, Carles. "Epiphytic Overgrowth of Charophyte Thalli by Stromatolite-like Structures and Fungi in the Lower Cretaceous of the Iberian Ranges (Spain)." Australian Journal of Botany 47, no. 3 (1999): 305. http://dx.doi.org/10.1071/bt97098.

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The Lower Cretaceous (113 million years old) lacustrine deposits of Las Hoyas(Iberian Ranges, Cuenca, Spain) yield an epiphytic assemblage formed by thecharophyte species Clavatoraxis diaz-romeraliiMartín-Closas & Diéguez overgrown by a muddy, laminatedstromatolite-like structure. Fossil charophyte thalli coated with biogeniclaminations were previously unknown from the fossil record. Within thisstromatolite-like structure, filaments are found which correspond to thalli ofanother charophyte, Palaeonitella vermicularisMartín-Closas & Diéguez, and to septate hyphae of fungi(Ascomycetes).

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Lapointe, B. E., B. J. Bedford, M. M. Littler, and D. S. Littler. "Shifts in coral overgrowth by sponges and algae." Coral Reefs 26, no. 3 (2007): 515. http://dx.doi.org/10.1007/s00338-007-0242-x.

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Mienasova, A. Sh. "MOST ANCIENT PODOLIA’S ALGAE AS TRIGGER FOR THE FORMATION OF PHOSPHORITES." Мінеральні ресурси України, no. 1 (April 25, 2019): 21–25. http://dx.doi.org/10.31996/mru.2019.1.21-25.

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The phosphorites are rather widely represented in platform carbonate and quartz-glauconite litho-tectonic complexes. They are also present in Kalyus Beds of Nagoryany Formation in Podolian Middle Dnister area.These beds are folded by homogeneous, dark-grey to black, thin-bedded mudstones. Characteristic feature of the beds is the occurrence of phosphorite concretions of different sizes. Dispersed phosphate mineralization (4–30 %) is also present in mudstones. Kalyus Beds have two levels enriched by remains of Vendotaenian algae. Lower level is located in the bottom surface and upper level is l

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Bulleri, F. "Duration of overgrowth affects survival of encrusting coralline algae." Marine Ecology Progress Series 321 (September 8, 2006): 79–85. http://dx.doi.org/10.3354/meps321079.

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Rovellini, Alberto, Matthew R. Dunn, Elizabeth A. Fulton, et al. "Interannual variability and decadal stability of benthic organisms on an Indonesian coral reef." Journal of the Marine Biological Association of the United Kingdom 101, no. 2 (2021): 221–31. http://dx.doi.org/10.1017/s0025315421000291.

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AbstractThe availability of colonizable substrate is an important driver of the temporal dynamics of sessile invertebrates on coral reefs. Increased dominance of algae and, in some cases, sponges has been documented on many coral reefs around the world, but how these organisms benefit from non-colonized substrate on the reef is unclear. In this study, we described the temporal dynamics of benthic organisms on an Indonesian coral reef across two time periods between 2006 and 2017 (2006–2008 and 2014–2017), and investigated the effects of colonizable substrate on benthic cover of coral reef orga

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