Journal articles: 'Cladophora'

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Aziz, Abdul, Shahima Islam, and Abdullah Harun Chowdhury. "Marine algae of St. Martins Island, Bangladesh. IX. New records of green algae (Chlorophyceae)." Bangladesh Journal of Plant Taxonomy 17, no. 2 (December 21, 2010): 193–98. http://dx.doi.org/10.3329/bjpt.v17i2.6699.

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Cladophora crispula Vickers, Cladophora prolifera (Roth) Kütz. and Phyllodictyon anastomosans (Harv.) Kraft et Wynne are recorded and described for the first time from the St. Martin’s Island, Cox's Bazar, Bangladesh.Keywords: Cladophora crispula; Cladophora prolifera; Phyllodictyon anastomosans; St. Martin’s Island.DOI: 10.3329/bjpt.v17i2.6699Bangladesh J. Plant Taxon. 17(2): 193-198, 2010 (December)

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Ishii, Satoshi, Tao Yan, Dawn A. Shively, Muruleedhara N. Byappanahalli, Richard L. Whitman, and Michael J. Sadowsky. "Cladophora (Chlorophyta) spp. Harbor Human Bacterial Pathogens in Nearshore Water of Lake Michigan." Applied and Environmental Microbiology 72, no. 7 (July 2006): 4545–53. http://dx.doi.org/10.1128/aem.00131-06.

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ABSTRACT Cladophora glomerata, a macrophytic green alga, is commonly found in the Great Lakes, and significant accumulations occur along shorelines during the summer months. Recently, Cladophora has been shown to harbor high densities of the fecal indicator bacteria Escherichia coli and enterococci. Cladophora may also harbor human pathogens; however, until now, no studies to address this question have been performed. In the present study, we determined whether attached Cladophora, obtained from the Lake Michigan and Burns Ditch (Little Calumet River, Indiana) sides of a breakwater during the summers of 2004 and 2005, harbored the bacterial pathogens Shiga toxin-producing Escherichia coli (STEC), Salmonella, Shigella, and Campylobacter. The presence of potential pathogens and numbers of organisms were determined by using cultural methods and by using conventional PCR, most-probable-number PCR (MPN-PCR), and quantitative PCR (QPCR) performed with genus- and toxin-specific primers and probes. While Shigella and STEC were detected in 100% and 25%, respectively, of the algal samples obtained near Burns Ditch in 2004, the same pathogens were not detected in samples collected in 2005. MPN-PCR and QPCR allowed enumeration of Salmonella in 40 to 80% of the ditch- and lakeside samples, respectively, and the densities were up to 1.6 × 103 cells per g Cladophora. Similarly, these PCR methods allowed enumeration of up to 5.4 × 102 Campylobacter cells/g Cladophora in 60 to 100% of lake- and ditchside samples. The Campylobacter densities were significantly higher (P < 0.05) in the lakeside Cladophora samples than in the ditchside Cladophora samples. DNA fingerprint analyses indicated that genotypically identical Salmonella isolates were associated with geographically and temporally distinct Cladophora samples. However, Campylobacter isolates were genetically diverse. Since animal hosts are thought to be the primary habitat for Campylobacter and Salmonella species, our results suggest that Cladophora is a likely secondary habitat for pathogenic bacteria in Lake Michigan and that the association of these bacteria with Cladophora warrants additional studies to assess the potential health impact on beach users.

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Verhougstraete, M. P., M. N. Byappanahalli, J. B. Rose, and R. L. Whitman. "Cladophora in the Great Lakes: impacts on beach water quality and human health." Water Science and Technology 62, no. 1 (July 1, 2010): 68–76. http://dx.doi.org/10.2166/wst.2010.230.

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Cladophora in the Great Lakes grows rapidly during the warm summer months, detaches, and becomes free-floating mats as a result of environmental conditions, eventually becoming stranded on recreational beaches. Cladophora provides protection and nutrients, which allow enteric bacteria such as Escherichia coli, enterococci, Shigella, Campylobacter, and Salmonella to persist and potentially regrow in the presence of the algae. As a result of wind and wave action, these microorganisms can detach and be released to surrounding waters and can influence water quality. Enteric bacterial pathogens have been detected in Cladophora mats; E. coli and enterococci may populate to become part of the naturalized microbiota in Cladophora; the high densities of these bacteria may affect water quality, resulting in unnecessary beach closures. The continued use of traditional fecal indicators at beaches with Cladophora presence is inadequate at accurately predicting the presence of fecal contamination. This paper offers a substantial review of available literature to improve the knowledge of Cladophora impacts on water quality, recreational water monitoring, fecal indicator bacteria and microorganisms, and public health and policy.

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Holomuzki, Joseph R., Robert W. Pillsbury, and Sapna B. Khandwala. "Interplay between dispersal determinants of larval hydropsychid caddisflies." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 11 (November 1, 1999): 2041–50. http://dx.doi.org/10.1139/f99-141.

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We examined the interactive effects of predator (perlid stoneflies) presence, epilithic algal cover, and substrate size on drift and resettlement decisions by larval hydropsychid caddisflies in a series of experiments conducted in real and artificial streams. Predator effects on drift-entry depended on algal structural complexity. Stoneflies significantly increased hydropsychid drift from biofilm-covered rocks but not from rocks covered with a thick periphyton mat or with a macroalga (Cladophora glomerata, approx. 20% surface cover). When we manipulated degree of Cladophora cover, we found that Cladophora even in small amounts (4-13% cover) nullified stonefly effects on drift and that drift was inversely related to amount of Cladophora on rocks. However, Cladophora may only be important as a dispersal determinant until retreats (i.e., immovable cases) are constructed and vulnerability to predators decreases. Hydropsychid drift rates were positively related to gravel abundance, but Cladophora presence enhanced settlement rates on the substrate. Our study shows that multiple factors jointly influence dispersal patterns of hydropsychid larvae and that the relative strength of any one factor as a dispersal determinant varies depending on conditions of other determinants.

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Byappanahalli, Muruleedhara N., and Richard L. Whitman. "Clostridium botulinum type E occurs and grows in the alga Cladophora glomerata." Canadian Journal of Fisheries and Aquatic Sciences 66, no. 6 (June 2009): 879–82. http://dx.doi.org/10.1139/f09-052.

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In recent years, massive avian die-offs from Clostridium botulinum type E infection have occurred in the Sleeping Bear Dunes National Lakeshore (SLBE) area of Lake Michigan. These outbreaks have been coincidental with massive blooms of the green algae Cladophora , mostly Cladophora glomerata . We tested the hypothesis that Clostridium botulinum type E can grow under suitable conditions in these algal mats. In a lab mesocosm study, Cladophora from four outbreak-impacted beaches from SLBE were compared with four unimpacted beaches in the Milwaukee–Racine area for bontE gene of Clostridium botulinum. Frequency of the bontE gene was higher after incubation (25 °C for up to 6 weeks) of Cladophora from impacted vs. the unimpacted area. Since no type E gene was detected initially in Cladophora from any of the eight locations, we infer that the increased occurrence of type E gene arose from spore germination or vegetative Clostridium growth within the existing algal mats of SLBE. Moreover, we found that the congener Clostridium perfringens readily grows in mesocosms containing Cladophora.

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Kuczynski, Anika, Martin T. Auer, Colin N. Brooks, and Amanda G. Grimm. "The Cladophora resurgence in Lake Ontario: characterization and implications for management." Canadian Journal of Fisheries and Aquatic Sciences 73, no. 6 (June 2016): 999–1013. http://dx.doi.org/10.1139/cjfas-2015-0460.

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Nuisance growth of the alga Cladophora, reported from Lake Ontario since the 1930s, abated in the decades following implementation of phosphorus control measures in the 1970s. Our examination of beach fouling records and historical observations of algal biomass has confirmed literature reports that a resurgence in nuisance growth of Cladophora has occurred since invasion of Great Lakes waters by dreissenids. Our findings indicate that the growth rate of Cladophora (specific rate of net photosynthesis) has decreased by 44% since 1972 in response to phosphorus controls. However, improved transparency, a response to mussel activity, has increased the maximum depth colonizable by Cladophora by a factor of 5 over that same interval. The net result is a sixfold increase in production potential since the late 1980s (the Post-P Management II Period) and a threefold increase since the 1970s (the Pre-P Management Period). Although the Cladophora resurgence has been driven by dreissenid modification of the light environment, phosphorus management remains the only alternative for reversing and ameliorating nuisance conditions. Elucidation of the nature of the Cladophora resurgence will aid decision-makers in maintaining a focus on phosphorus management as the appropriate means of remediating nuisance growth of the alga.

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Whitman, Richard L., Dawn A. Shively, Heather Pawlik, Meredith B. Nevers, and Muruleedhara N. Byappanahalli. "Occurrence of Escherichia coli and Enterococci in Cladophora (Chlorophyta) in Nearshore Water and Beach Sand of Lake Michigan." Applied and Environmental Microbiology 69, no. 8 (August 2003): 4714–19. http://dx.doi.org/10.1128/aem.69.8.4714-4719.2003.

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ABSTRACT Each summer, the nuisance green alga Cladophora (mostly Cladophora glomerata) amasses along Lake Michigan beaches, creating nearshore anoxia and unsightly, malodorous mats that can attract problem animals and detract from visitor enjoyment. Traditionally, elevated counts of Escherichia coli are presumed to indicate the presence of sewage, mostly derived from nearby point sources. The relationship between fecal indicator bacteria and Cladophora remains essentially unstudied. This investigation describes the local and regional density of Escherichia coli and enterococci in Cladophora mats along beaches in the four states (Wisconsin, Illinois, Indiana, and Michigan) bordering Lake Michigan. Samples of Cladophora strands collected from 10 beaches (n = 41) were assayed for concentrations of E. coli and enterococci during the summer of 2002. Both E. coli and enterococci were ubiquitous (up to 97% occurrence), with overall log mean densities (± standard errors) of 5.3 (± 4.8) and 4.8 (± 4.5) per g (dry weight). E. coli and enterococci were strongly correlated in southern Lake Michigan beaches (P < 0.001, R 2 = 0.73, n = 17) but not in northern beaches (P = 0.892, n = 16). Both E. coli and enterococci survived for over 6 months in sun-dried Cladophora mats stored at 4°C; the residual bacteria in the dried alga readily grew upon rehydration. These findings suggest that Cladophora amassing along the beaches of Lake Michigan may be an important environmental source of indicator bacteria and call into question the reliability of E. coli and enterococci as indicators of water quality for freshwater recreational beaches.

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Ibsen, Michael, Dinesh M. Fernando, Ayush Kumar, and Andrea E. Kirkwood. "Prevalence of antibiotic resistance genes in bacterial communities associated with Cladophora glomerata mats along the nearshore of Lake Ontario." Canadian Journal of Microbiology 63, no. 5 (May 2017): 439–49. http://dx.doi.org/10.1139/cjm-2016-0803.

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The alga Cladophora glomerata can erupt in nuisance blooms throughout the lower Great Lakes. Since bacterial abundance increases with the emergence and decay of Cladophora, we investigated the prevalence of antibiotic resistance (ABR) in Cladophora-associated bacterial communities up-gradient and down-gradient from a large sewage treatment plant (STP) on Lake Ontario. Although STPs are well-known sources of ABR, we also expected detectable ABR from up-gradient wetland communities, since they receive surface run-off from urban and agricultural sources. Statistically significant differences in aquatic bacterial abundance and ABR were found between down-gradient beach samples and up-gradient coastal wetland samples (ANOVA, Holm–Sidak test, p < 0.05). Decaying and free-floating Cladophora sampled near the STP had the highest bacterial densities overall, including on ampicillin- and vancomycin-treated plates. However, quantitative polymerase chain reaction analysis of the ABR genes ampC, tetA, tetB, and vanA from environmental communities showed a different pattern. Some of the highest ABR gene levels occurred at the 2 coastal wetland sites (vanA). Overall, bacterial ABR profiles from environmental samples were distinguishable between living and decaying Cladophora, inferring that Cladophora may control bacterial ABR depending on its life-cycle stage. Our results also show how spatially and temporally dynamic ABR is in nearshore aquatic bacteria, which warrants further research.

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Olapade, Ola A., Morgan M. Depas, Erika T. Jensen, and Sandra L. McLellan. "Microbial Communities and Fecal Indicator Bacteria Associated with Cladophora Mats on Beach Sites along Lake Michigan Shores." Applied and Environmental Microbiology 72, no. 3 (March 2006): 1932–38. http://dx.doi.org/10.1128/aem.72.3.1932-1938.2006.

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ABSTRACT A high biomasses of Cladophora, a filamentous green alga, is found mainly during the summer along the shores of Lake Michigan. In this study, the abundance and persistence of the fecal indicator bacterium Escherichia coli and sulfate-reducing bacteria (SRB) on Cladophora mats collected at Lake Michigan beaches were evaluated using both culture-based and molecular analyses. Additionally, 16S rRNA gene cloning and sequencing were used to examine the bacterial community composition. Overall, E. coli was detected in all 63 samples obtained from 11 sites, and the average levels at most beaches ranged from 2,700 CFU/100 g (wet weight) of Cladophora to 7,500 CFU/100 g of Cladophora. However, three beaches were found to have site average E. coli densities of 12,800, 21,130, and 27,950 CFU/100 g of Cladophora. The E. coli levels in the lake water collected at the same time from these three sites were less than the recommended U.S. Environmental Protection Agency limit, 235 CFU/100 ml. E. coli also persisted on Cladophora mats in microcosms at room temperature for more than 7 days, and in some experiments it persisted for as long as 28 days. The SRB densities on Cladophora mats were relatively high, ranging from 4.4 × 106 cells/g (6.64 log CFU/g) to 5.73 × 106 cells/g (6.76 log CFU/g) and accounting for between 20% and 27% of the total bacterial counts. Partial sequences of the 16S rRNA gene clones revealed a phylogenetically diverse community, in which the Cytophaga-Flavobacterium-Bacteroides cluster and the low-G+C-content gram-positive bacteria were the dominant organisms, accounting for 40% and 12.8%, respectively, of the total clone library. These results further reveal the potential public health and ecological significance of Cladophora mats that are commonly found along the shoreline of Lake Michigan, especially with regard to the potential to harbor microorganisms associated with fecal pollution and odor-causing bacteria.

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Journal, Baghdad Science. "Anti –phytopathogenic Activities of Cladophora glomerata extract against plant fungi." Baghdad Science Journal 11, no. 2 (June 1, 2014): 883–87. http://dx.doi.org/10.21123/bsj.11.2.883-887.

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The antiphytopathogenic effects of the crude methanol extract of Cladophora glomerata (Lin.) Kützing (Cladophoraceae) which isolated from Al Rashidiya region at north of Baghdad was investigated against two type of plant fungi (Pythium altimum and Rhizoctonia solani) which causes damping off disease where isolated from covered cucumber field in Al-Alyosifia region. Hot methanol extract showed antifungal activity against the two species of fungi in different concentrations(10,25,50 mg/ml) of extract to Cladophora glomerata as percentage inhibition (51.63 ,72.8 ,83.71) and (56.18 ,77.41 ,100)comparing with Pythium altimum and Rhizoctonia solani respectively .primary detection of active compounds showed that macroalgae (Cladophora glomerata) containing flavonoids,alkaloids, phenols and tannins. Our findings suggest the possibility of using the Cladophora glomerata as a novel source of natural antimicrobial agents for pharmaceutical industries.

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Sobhan, Rumman, and Steven P. K. Sternberg. "Cadmium removal using cladophora." Journal of Environmental Science and Health, Part A 34, no. 1 (January 1999): 53–72. http://dx.doi.org/10.1080/10934529909376823.

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12

Dodds, Walter K., and Dolly A. Gudder. "THE ECOLOGY OF CLADOPHORA." Journal of Phycology 28, no. 4 (August 1992): 415–27. http://dx.doi.org/10.1111/j.0022-3646.1992.00415.x.

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WIK-SJÖSTEDT, AGNETA. "Cytogenetic investigations in Cladophora." Hereditas 66, no. 2 (September 2, 2009): 233–61. http://dx.doi.org/10.1111/j.1601-5223.1970.tb02348.x.

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Abd, I. N., and M. J. Mohammed-Ridha. "TETRACYCLINE ANTIBIOTIC REMOVAL FROM AQUEOUS SOLUTION USING CLADOPHORA AND SPIRULINA ALGAE BIOMASS." IRAQI JOURNAL OF AGRICULTURAL SCIENCES 52, no. 2 (April 19, 2021): 336–47. http://dx.doi.org/10.36103/ijas.v52i2.1295.

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Cladophora and Spirulina algae biomass have been used for the removal of Tetracycline (TC) antibiotic from aqueous solution. Different operation conditions were varied in batch process, such as initial antibiotic concentration, different biomass dosage and type, contact time, agitation speed, and initial pH. The result showed that the maximum removal efficiencies by using 1.25 g/100 ml Cladophora and 0.5 g/100 ml Spirulina algae biomass were 95% and 94% respectively. At the optimum experimental condition of temperature 25°C, initial TC concentration 50 mg/l, contact time 2.5hr, agitation speed 200 rpm and pH 6.5. The characterization of Cladophora and Spirulina biomass by Fourier transform infrared (FTIR) indicates that the presence of functional groups of different components such as the Hydroxyl group (-OH), amides(N-H stretch) were responsible of surface adsorption processes. The isothermal study has been applied using Freundlich, Temkin, and Langmuir models. The data best fitted with the Langmuir model. Finally, The pseudo-second-order kinetic model was best fitted the kinetic data with a high coefficient of determination (R2< 0.97 and 0.99) when used Cladophora and Spirulina algae biomass, respectively. The study showed that both Cladophora and Spirulina algae were promising and economical biomass that could be used for a large scale bioreactor.

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Howell, E. "Influences on Water Quality and Abundance of Cladophora, a Shore-Fouling Green Algae, over Urban Shoreline in Lake Ontario." Water 10, no. 11 (November 2, 2018): 1569. http://dx.doi.org/10.3390/w10111569.

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Urban centers border western Lake Ontario, the terminus of the Laurentian Great Lakes, impacting water quality on the shores of this oligotrophic lake. The green algae Cladophora proliferates on the shallow lakebed and fouls the shoreline, presenting an eutrophication concern. The conditions over a typical urbanized shoreline were studied to assess linkages between Cladophora and area nutrient sources. The most pervasive of the mixing areas of varying extent identified using field sensor measurements was associated with the discharge of treated sewage from a Water Pollution Control Plant (WPCP). Phosphorus and nitrogen were enriched at times near the WPCP diffuser and also in shallow water along the shoreline. Dissolved nutrients were also measured directly above the lakebed in close proximity to Cladophora. Dissolved phosphorus and inorganic nitrogen were higher in proximity to the WPCP diffuser at times, however, spatial patterns were not as clearly aligned with external inputs as the patterns of enrichment in the water column. Biomass distribution of Cladophora was unrelated to nutrient levels in the water column or at the lakebed. Yet, concentrations of phosphorus in Cladophora, an indicator of nutrient sufficiency, were higher near the WPCP diffuser. This disparity, while possibly an artifact of variable loss rates of biomass among locations, may in part stem from variable water clarity among areas. Abundant dreissenid mussels also potentially obscure the effects of nutrient loading on algal biomass if the sequestering of phosphorus from offshore plankton, suggested by periods of onshore circulation, approaches the extent of external loading. Further study of phosphorus flux at the lakebed is required to establish clear linkages between external nutrient loading and algal growth in order to manage the proliferation of Cladophora over urban coastline.

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Satjarak, Anchittha, Jittra Piapukiew, Wikrom Chanthapatchot, Karnjana Ruen-Pham, and Alisa S. Vangnai. "Hercide Atrazine Alters the Microbiota of the Filametous Green Alga Cladophora sp. Cultured from Thailand." Sains Malaysiana 50, no. 5 (May 31, 2021): 1255–65. http://dx.doi.org/10.17576/jsm-2021-5005-06.

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The attached green alga Cladophora known to harbor microbiota that play important roles in ecosystem, is one of the most common freshwater filamentous green algae in rivers globally, including those in the northern part of Thailand. These rivers mostly run through agricultural regions where herbicides are heavily used to improve crop quality and quantity. The extensively-used herbicide atrazine persists in soil sediments through transport by surface runoff to rivers. The effect of such herbicide contamination on Cladophora microbiota in Thailand have not been investigated. To acquire this information, 16S rDNA amplicons were used to compare microbiota of Cladophora sp. cultures treated with a spectrum of atrazine concentrations. The results showed that the Cladophora microbiome included at least 106 possible Operational taxonomic units (OTUs) representing twelve bacterial phyla which are Acidobacteria, Actinobacteria, Armatimonadetes, Chloroflexi, Cyanobacteria, Deinococcus-Thermus, Epsilonbacteraeota, Nitrospirae, Patescibacteria, Planctomycetes, Proteobacteria, and WPS-2, representing both core and local algal bacteria. The presence of atrazine was also correlated with changes in richness of bacterial taxa suggesting that these algal epibiotic bacteria were differently affected by atrazine treatments.

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Lee, Yi Chao, Shui Ping Chang, Chih Sheng Lee, and Nien Hsin Kao. "Influence of Pigment Extraction on Pb(II) Biosorption of Cladophora and Spirogyra Algae Powder." Advanced Materials Research 610-613 (December 2012): 3591–98. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.3591.

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The Cladophora and Spirogyra genera are classified within the green algae division. Species belonging to these genera comprise large filamentous algae, possess significant biomass, and are found in freshwater around the world. These characteristics give Cladophora and Spirogyra high potential to be developed as biological materials. For this study, we harvested fresh Cladophora and Spirogyra and produced algae powder using two of conventional procedures: with pigment extraction and without pigment extraction. The resulting algae powders were subjected to Pb(II) biosorption, and the differences in biosorption rates were subsequently analyzed. Our study found the following: (i) significant differences in cell structure, cell wall thickness, the type and content of cell composition, and the quantity of epiphytes between Cladophora and Spirogyra. This variation influenced the functional groups within the resulting algae powders and their binding sites, which further led to different levels of Pb(II) adsorption. (ii) Glacial acetic acid, a compound commonly employed in pigment extraction procedures, affected the functional groups and the binding sites of the resulting algae powders. For Cladophora algae powder, Pb(II) biosorption was reduced by 16.6 %; whereas for Spirogyra algae powder, Pb(II) biosorption was reduced by 19.8 %. (iii) The pigment extraction procedure exerted the most significant influence on the carbonyl groups and hydroxyl groups in algae powder. (iv) The pigment extraction procedure is not suitable for the preparation of algae powders which will be used for metal ion biosorption.

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Painter, D. Scott, and Michael B. Jackson. "Cladophora Internal Phosphorus Modeling: Verification." Journal of Great Lakes Research 15, no. 4 (January 1989): 700–708. http://dx.doi.org/10.1016/s0380-1330(89)71522-7.

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Vymazal, Jan. "Zn uptake by Cladophora glomerata." Hydrobiologia 148, no. 2 (May 1987): 97–101. http://dx.doi.org/10.1007/bf00008394.

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Blunden, Gerald, David J. Rogers, Beverley E. Smith, Christopher H. Turner, Alfredo Carabot C., M. Antonio Morales, and P. Carmelo Rosquete. "α-Alaninebetaine from Cladophora species." Phytochemistry 27, no. 1 (1988): 277. http://dx.doi.org/10.1016/0031-9422(88)80631-9.

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Lee, Yi Chao, Shui Ping Chang, Chih Sheng Lee, and Nien Hsin Kao. "Influence of Substrate Type on the Attachment of Cladophora glomerata (L.) Kütz." Advanced Materials Research 664 (February 2013): 259–64. http://dx.doi.org/10.4028/www.scientific.net/amr.664.259.

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The Cladophora genus comprises macro benthic green algae, widely distributed in estuaries, rivers, and lakes around the world. It is often a dominant species and influences environmental and ecological systems. Cladophora is a biological material with great development potential due mainly to its significant biomass and the ease with which it can be harvested. Furthermore, because it can live on various carriers or vectors, the growth conditions of Cladophora can affect the group to which it belongs. To investigate the growth of the Cladophora group in the natural environment, this study endeavored to (1) observe the biomass accumulation of Cladophora glomerata on varying substrates, (2) determine whether substrate roughness has an impact on the attachment of C. glomerata, and (3) identify the relationship between the attachment of pioneer diatoms and C. glomerata. Five types of substrate were selected (glass slide, glazed tile, marble, unglazed tile, and wood) and placed in the natural habitat of C. glomerata, a sub-tropical river. After thirty days, unglazed tile produced the largest biomass of 2332.2 dry weight mg/m2, followed by wood (1744.3 dry weight mg/m2), marble (158.1dry weight mg/m2), glass slide (90.7dry weight mg/m2), and glazed tile(36.3 dry weight mg/m2). The results of this study indicate that the type and roughness of the substrate both influence the attachment of C. glomerata and the subsequent development of its population. The existence of biofilm formed by pioneer diatoms on the substrate is also beneficial to the epiphytic growth of C. glomerata. Moreover, the development of pioneer diatoms is associated with the type of substrate and its silicon content.

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S., Usha N., Sabari Anand J. V., and Mangaiyarkarasi . "Preliminary phytochemical screening and GC-MS analysis of Cladophora glomerata: green marine algae." International Journal of Basic & Clinical Pharmacology 8, no. 4 (March 23, 2019): 732. http://dx.doi.org/10.18203/2319-2003.ijbcp20191108.

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Background: Seaweeds since ages are excellent source of biologically active ingredients. Several Asian countries have a strong tradition of using various seaweeds in herbal medicines preparations. These plants contain various phytochemical constituents having biological activities. Seaweeds are the source of phytochemicals namely agar-agar, carrageenan and algin, which are extensively used in various industries such as food, confectionary, textiles, pharmaceuticals, dairy and paper industries mostly as gelling, stabilizing and thickening agents. They are also used for human consumption, animal feed and as manure in several countries. Several Asian countries are using various seaweeds in traditional medicines.Methods: In the present study, the shade dried and methanolic extract of Cladophora glomerata, a marine green algae was subjected to preliminary phytochemical and gas chromatography-mass spectrometry analysis(GC-MS) to identify the various bioactive components.Results: The methanolic extract of Cladophora glomerata revealed the presence of alkaloids, glycosides, flavonoids, saponins, diterpenes and carbohydrates. The GC-MS analysis of the methanolic extract of Cladophora glomerata showed the presence of 42 different compounds. The major compounds were dibutyl phthalate (27.07%), hexadecanoic acid, methyl ester (9.58%), 1,2-benzene-di-carboxylic acid (8.11%), octatriacontyl trifluoroacetate (6.81%), cholesterol (6.66%).Conclusions: Thus, in the present study of Cladophora glomerata, phytochemical and GC-MS analysis provides an important novel information to support further ongoing studies to evaluate structure of bioactive compound and its pharmacological activities.

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Entwisle, TJ. "Phenology of the Cladophora-Stigeoclonium community in Two Urban Creeks of Melbourne." Marine and Freshwater Research 40, no. 5 (1989): 471. http://dx.doi.org/10.1071/mf9890471.

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Cladophora glomerata and Stigeoclonium tenue dominate lowland urban creeks in the Yarra River basin of south-central Victoria. In Darebin and Merri Creeks, Cladophora produces extensive mats in summer and autumn, and is mostly replaced by Stigeoclonium in winter and spring. Although Stigeoclonium can grow all year round, it only outcompetes Cladophora in winter and spring, when air temperatures range between a maximum of < 15� C and a nightly minimum of < 10� C (water temperature < 15� C, usually about 10� C). The seasonal composition and abundance of these macroalgae depend on temperature and on the severity of, and time since, the last floods, and the effect that these factors have on interspecific competition. Features of the microhabitat (e.g. photon irradiance, substratum stability and composition, and mean flow rates) determine the range of these variations. The biomass of both macroalgae fluctuates widely; this is due mainly to floods, which can remove almost the entire standing crop. In off-seasons, both species are maintained by small resilient plants or protected populations (in culture, plants remain viable after up to 6 months in complete darkness). Filaments of Cladophora readily produce zoospores and new vegetative growth following dormancy. The prostrate thallus of Stigeoclonium initiates new erect filaments before zoospores are produced. An understanding of the large local and seasonal variations in macroalgal biomass is essential for biological monitoring programmes.

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Ivanova, Veselina, Mona Stancheva, and Albena Merdzhanova. "Fatty acids composition of macroalgae from Bulgarian Black Sea coast." Analele Universitatii "Ovidius" Constanta - Seria Chimie 23, no. 1 (June 1, 2012): 35–40. http://dx.doi.org/10.2478/v10310-012-0005-6.

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Abstract Lipids and fatty acids (FA) composition of three Black Sea macroalgae Cladophora vagabunda,Ceramium rubrum and Cystoseira barbata were studied. Fatty acids composition was analyzed by GC/MS. Total lipids content varied widely among the species and ranged between 0.66 and 0.98 g per 100 g fresh weight. Generally, saturated fatty acids were major components (62-71%), with 16:0 as the most abundant saturate (41- 57%). Total polyunsaturated FAs and monounsaturated FAs ranged from 28% to 38%. The green alga Cladophora vagabunda showed higher C18 PUFAs contents than did C20 PUFAs while for red alga Ceramiumrubrum the trend was opposite. Cystoseira barbata belonging to the group of brown algae showed similar amounts of C18 and C20 PUFAs contents. Cladophora vagabunda was rich in linoleic acid and Ceramiumrubrum in arachidonic acid (AA) while Cystoseira barbata was rich in both linoleic acid and eicosopentaenoic acid. All of the studied species had a nutritionally beneficial n6/n3 ratio (1.24-2.84:1).

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Roger, Vuong, Chanzy Henri, and Sugiyama Junji. "The cellulose system of cladophora densa." Biology of the Cell 75, no. 3 (January 1992): 264. http://dx.doi.org/10.1016/0248-4900(92)90174-y.

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Elenkov, Ivaylo, Tamara Georgieva, Petia Hadjieva, Stefka Dimitrova-Konaklieva, and Simeon Popov. "Terpenoids and sterols in Cladophora vagabunda." Phytochemistry 38, no. 2 (January 1995): 457–59. http://dx.doi.org/10.1016/0031-9422(94)00704-w.

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Ingólfsson, A., and S. J. Hawkins. "Slow recovery from disturbance: a 20 year study of Ascophyllum canopy clearances." Journal of the Marine Biological Association of the United Kingdom 88, no. 4 (June 25, 2008): 689–91. http://dx.doi.org/10.1017/s0025315408001161.

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We describe an experiment where Ascophyllym nodosum was removed from two 1 x 1 m plots in south-western Iceland in August 1985. The plots were studied regularly until 2005. Recovery of the Ascophyllum canopy took 7–8 years. The understorey algae in one of the plots consisted mostly of extensive growth of Cladophora rupestris, which died within a year of Ascophyllum clearance. No Cladophora had reappeared by 2005, although it was healthy and abundant in control plots throughout the study period. Thus even after 20 years the community had not recovered from disturbance.

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Higgins, Scott N., Robert E. Hecky, and Stephanie J. Guildford. "Environmental Controls of Cladophora Growth Dynamics in Eastern Lake Erie: Application of the Cladophora Growth Model (CGM)." Journal of Great Lakes Research 32, no. 3 (September 2006): 629–44. http://dx.doi.org/10.3394/0380-1330(2006)32[629:ecocgd]2.0.co;2.

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Pikosz, Marta, Joanna Czerwik-Marcinkowska, and Beata Messyasz. "The effect of Cladophora glomerata exudates on the amino acid composition of Cladophora fracta and Rhizoclonium sp." Open Chemistry 17, no. 1 (April 24, 2019): 313–24. http://dx.doi.org/10.1515/chem-2019-0032.

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AbstractFilamentous green algae (FGA) frequently forms dense mats which can be either mono- or polyspecies. While various defense mechanisms of competition in algae are known, little is known about the interactions between different species of FGA. An experiment in controlled laboratory conditions was conducted to gather data on the changes in amino acids (AA) concentrations in FGA species in the presence of exudates from different other species. The aim of the present study was to identify the AA whose concentrations showed significant changes and to assess if the changes could be adaptation to stress conditions. The major constituents of the AA pool in Cladophora glomerata, C. fracta and Rhizoclonium sp. were Glutamic acid (Glu), Aspartic acid (Asp) and Leucine (Leu). In response to chemical stress, that is the increasing presence of exudates, a significant increase in the concentrations Proline (Pro) and Tryptophan (Trp) was noted. The increase in Proline levels was observed in C. fracta and Rhizoclonium in response to chemical stress induced by C. glomerata exudates. As the concentration of exudates increased in the medium, there was a progressive shift in the pattern of AA group in FGA.

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Fauza, Anna Niska, Mardiyati Mardiyati Mardiyati, and Steven Steven. "PEMBUATAN DAN KARAKTERISASI SEPARATOR BATERAI BERBAHAN SELULOSA ALGA CLADOPHORA." Jurnal Teknologi Bahan dan Barang Teknik 9, no. 2 (December 31, 2019): 69. http://dx.doi.org/10.37209/jtbbt.v9i2.135.

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Membran separator merupakan salah satu komponen penting yang berfungsi sebagai pemisah antara dua elektroda untuk transfer ion didalam elektrolit, serta memastikan keselamatan dan performa kapasitansi pada baterai. Pengembangan material separator baterai yang ramah lingkungan saat ini banyak dilakukan dengan tujuan untuk mencari material alternatif selain poliolefin. Salah satu material yang cukup menjanjikan adalah selulosa. Selulosa memiliki sifat wettability yang baik, biaya pemrosesan yang rendah, sifat mekanik yang baik dan merupakan material yang dapat diperbaharui. Pada penelitian ini dilakukan pembuatan separator baterai dari bahan selulosa yang diekstrak dari alga Cladophora. Selulosa diperoleh melalui tiga perlakuan yaitu alkalisasi dengan menggunakan NaOH 17,5%, perlakuan asam dengan menggunakan H2SO4 1M dan bleaching dengan menggunakan H2O2 5%. Membran separator dibuat dengan menggunakan metode solution casting dengan konsentrasi selulosa sebesar 0,011; 0,008; 0,006; 0,004 dan 0,003 gr/cm2. Pengukuran porositas dan stabilitas termal dilakukan dengan menggunakan scannning electron microscopy (SEM) dan thermogravimetric analysis (TGA). Pengujian stabilitas kimia dan sudut kontak dilakukan untuk menentukan ketahanan kimia membran separator terhadap elektrolit dan sifat wettability. Dari penelitian ini dapat disimpulkan bahwa selulosa yang diekstrak dari alga Cladophora memiliki potensi yang besar untuk dimanfaatkan sebagai bahan baku pembuatan membran separator baterai.Kata Kunci: alga, Cladophora, membran separator, porositas, selulosa.

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LEVKOV, Z., and S. KRSTIC. "Use of algae for monitoring of heavy metals in the River Vardar, Macedonia." Mediterranean Marine Science 3, no. 1 (June 1, 2002): 99. http://dx.doi.org/10.12681/mms.262.

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Aiming to resolve some of the problems regarding monitoring of heavy metals in rivers using Cladophora glomerata and epilithic algal communities, a year’s survey of Co, Cd, Cu, Fe, Mn, Pb and Zn has been conducted on the river Vardar, FY Republic of Macedonia. Obtained results and statistical analysis clearly point out the well documented possibility of using epilithon (basically diatom communities) as a monitoring tool, since correlation patterns for epilithon are either better or the same as those for Cladophora, while at the same time epilithon is much more reliable for monitoring, especially in cases when no other plant material can be obtained.

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Rocha, Igor, Jonas Lindh, Jaan Hong, Maria Strømme, Albert Mihranyan, and Natalia Ferraz. "Blood Compatibility of Sulfonated Cladophora Nanocellulose Beads." Molecules 23, no. 3 (March 7, 2018): 601. http://dx.doi.org/10.3390/molecules23030601.

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Munir, Mubashrah, Rahmatullah Qureshi, Muhammadi Bibi, and Arshad Mahmood Khan. "Pharmaceutical aptitude of Cladophora: A comprehensive review." Algal Research 39 (May 2019): 101476. http://dx.doi.org/10.1016/j.algal.2019.101476.

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Gao, Wenhua, Kefu Chen, Jinsong Zeng, Jun Xu, and Bin Wang. "Thermal pyrolysis characteristics of macroalgae Cladophora glomerata." Bioresource Technology 243 (November 2017): 212–17. http://dx.doi.org/10.1016/j.biortech.2017.06.041.

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ZHAO, ZHI-JUAN, HUAN ZHU, ZHENG-YU HU, and GUO-XIANG LIU. "Occurrence of true branches in Rhizoclonium (Cladophorales, Ulvophyceae) and the reinstatement of Rhizoclonium pachydermum Kjellman." Phytotaxa 166, no. 4 (April 30, 2014): 273. http://dx.doi.org/10.11646/phytotaxa.166.4.3.

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The phylogenetic position of the freshwater green alga Rhizoclonium pachydermum (Ulvophyceae: Cladophorales) was investigated using nuclear 18S rRNA gene and internal transcribed spacer 2 (ITS2) sequences. This alga has been referred to as Cladophora pachyderma. Based on its morphology, it was formerly classified in the section Affines in the genus Cladophora. However, this classification was not supported by the current phylogenetic analyses, where Rhizoclonium pachydermum formed a well-supported clade with other Rhizoclonium species. We consider that Rhizoclonium possesses real branches and the most important criteria that characterize the genus are: long unbranched filaments only with rhizoid branches, or only branched at the basal region of the thallus; and cylindrical cells with few or limited numbers of nuclei.

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Auer, Martin, Cory McDonald, Anika Kuczynski, Chenfu Huang, and Pengfei Xue. "Management of the Phosphorus–Cladophora Dynamic at a Site on Lake Ontario Using a Multi-Module Bioavailable P Model." Water 13, no. 3 (January 31, 2021): 375. http://dx.doi.org/10.3390/w13030375.

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The filamentous green alga Cladophora grows to nuisance proportions in Lake Ontario. Stimulated by high phosphorus concentrations, nuisance growth results in the degradation of beaches and clogging of industrial water intakes with attendant loss of beneficial uses. We develop a multi-module bioavailable phosphorus model to examine the efficacy of phosphorus management strategies in mitigating nuisance algal growth. The model platform includes modules simulating hydrodynamics (FVCOM), phosphorus-phytoplankton dynamics (GEM) and Cladophora growth (GLCMv3). The model is applied along a 25 km stretch of the Lake Ontario nearshore, extending east from Toronto, ON and receiving effluent from three wastewater treatment plants. Simulation results identify the Duffin Creek wastewater treatment plant effluent as a driving force for nuisance conditions of Cladophora growth, as reflected in effluent bioavailable phosphorus concentrations and the dimensions of the plant’s phosphorus footprint. Simulation results demonstrate that phosphorus removal by chemically enhanced secondary treatment is insufficient to provide relief from nuisance conditions. Tertiary treatment (chemically enhanced secondary treatment with ballasted flocculation) is shown to eliminate phosphorus-saturated conditions associated with the Duffin Creek wastewater treatment plant effluent, providing local relief from nuisance conditions. Management guidance presented here has wider application at sites along the highly urbanized Canadian nearshore of Lake Ontario.

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Ross, Michael E., Katharine Davis, Rory McColl, Michele S. Stanley, John G. Day, and Andrea J. C. Semião. "Nitrogen uptake by the macro-algae Cladophora coelothrix and Cladophora parriaudii: Influence on growth, nitrogen preference and biochemical composition." Algal Research 30 (March 2018): 1–10. http://dx.doi.org/10.1016/j.algal.2017.12.005.

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Muñoz A., Ramón, Selma Santome, and Jorge León Q. "Actividad antibacteriana de extractos hexánico y etanólico de macroalgas marinas de la Bahía de Ancón, Lima – Perú." Revista de Investigaciones Veterinarias del Perú 31, no. 2 (June 20, 2020): e17829. http://dx.doi.org/10.15381/rivep.v31i2.17829.

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En el presente trabajo se evaluaron las actividades antimicrobianas de extractos etanólicos y hexánicos de nueve especies de macroalgas marinas recolectadas en la zona intermareal de la playa San Francisco, Ancón, de Lima, Perú. La evaluación se realizó in vitro frente a un panel de bacterias estándar Gram positivas (Staphylococcus aureus ATCC 6538, Bacillus subtilis ATCC 6633 y Enterococcus faecalis ATCC 51922) y Gram negativas (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 9027 y Salmonella Typhimurium ATCC 14028). Los extractos etanólicos fueron de mayor rendimiento (67%) en comparación a los hexánicos (33%), en especial frente a los Gram positivos, siendo el extracto obtenido de Ulva enteromorpha var. intestinalis y U. nematoidea los más activos frente a S. aureus ATCC 6538 (74.1 y 78.2 % de inhibición, respectivamente). Los extractos etanólicos de Cladophora sp y U. nematoidea frente a B. subtilis ATCC 6633 presentaron inhibiciones entre moderada y baja (52.5 y 33%, respectivamente). Los extractos etanólicos de U. enteromorpha y Cladophora sp frente a S. Typhimurium presentaron solo 40% de inhibición. El extracto etanólico de Cladophora sp fue el único que presentó actividad antimicrobiana frente a las cinco cepas bacterianas y fue elegida para determinar la Concentración Mínima Inhibitoria (CMI), que resultó en 12.5 y 25 mg/ml frente a B. subtilis ATCC 6633 y S. aureus ATCC 6538, respectivamente. Se concluye que, la mayoría de las macroalgas estudiadas contienen compuestos inhibitorios, cuyos extractos etanólico y hexánico son capaces de inhibir el crecimiento de bacterias patógenas.

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Bintari, Yoni Rina, and Rio Risandiansyah. "In Silico Study to Assess Antibacterial Activity from Cladophora Sp. on Peptide Deformylase: Molecular Docking Approach." Borneo Journal of Pharmacy 2, no. 1 (May 4, 2019): 20–23. http://dx.doi.org/10.33084/bjop.v2i1.717.

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Increasing antibiotic-resistant pathogenic bacteria is a severe problem in the world. Therefore, there is a need to identify new drugs from natural products and also new drug targets. Cladophora sp. is a marine organism which is known to have bioactive compounds and a potential antibacterial. On the other hand, Peptide Deformylase (PDf) may prove to be a novel drug target since it is crucial for native peptide functioning in most pathogenic bacteria. This study screens for PDf inhibition activity of compounds from Cladophora sp. using molecular docking approach and screening the binding affinity of bioactive compounds against the peptide receptor PDf using Pyrex Autodock Vina software. Docking results were stored and visualized using Biovia Discovery Studio and PyMOL ligand. Ligands were obtained from previous literature in PubChem, and receptor peptide PDf from pathogenic bacteria: Pseudomonas aeruginosa (PDB ID:1N5N), Escherichia coli (PDB ID:1BSK), Enterococcus faecium (PDB ID:3G6N) and Staphylococcus aureus (PDB ID:1LQW), was obtained from the peptide data bank. The results of this screening show with ligand the highest binding affinity against PDf of P. aeruginosa, E. coli, E. faecium, and S. aureus is stearic acid (-5.9 kcal/mol), eicosapentaenoic acid (-6.6 kcal/mol), stearic acid (-5.8 kcal/mol), and stearic acid (-6.2 kcal/mol) respectively. The binding of natural compounds from Cladophora sp. with PDf models may provide a new drug with a different drug target for antibacterial potential.

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Chang, Shui Ping, Yi Chao Lee, Chih Sheng Lee, and Nien Hsin Kao. "Using Gin Adsorption Model for Assessing the Influence of Algal Powder Bleach Process in Cu(II) Adsorption." Applied Mechanics and Materials 295-298 (February 2013): 123–28. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.123.

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The Cladophora and Spirogyra algae examined in this study belong to the Chlorophyta division. Macro filamentous algae, which are widespread in fresh water worldwide, have high potential to be developed as biological materials because of their large biomass and availability. In this study, we collected fresh algae from where they grew and produced bleached and unbleached algae powder using to adsorb Cu(II) ion solution. After the biosorption process, we noted the following four significant findings: (i) The functional groups and binding sites in the produced algae powder were affected, causing variations in the amount of copper adsorbed. The variations resulted from differences in the cell structure, the cell wall thickness of Cladophora and Spirogyra algae, cell composition, and the types and amount of epiphytic algae. (ii) Common bleaching procedures using glacial acetic acid influenced the binding sites of the functional groups and the biomass of the produced powder. Because of the bleaching, the amount of copper adsorbed by the Cladophora powder declined by 14.2%, and by 15.7% for Spirogyra powder. (iii) The carbonyl and hydroxyl groups of unbleached powder were the main elements affected during the bleaching procedures. Examining whether the biosorption experiment results fit Gin’s biosorption model, we found that the biosorption amount and equilibrium reaction of the two bleached algae powders were inferior to that of the unbleached algae powders. (iv) The bleaching procedure using glacial acetic acid was not suitable for producing algae powder to use as an adsorbent for metal ions.

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Demal, L., and M. Fortin. "Shading with Bank Side Trees to Control Cladophora." Canadian Water Resources Journal 12, no. 4 (January 1987): 43–51. http://dx.doi.org/10.4296/cwrj1204043.

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Mantai, Kenneth E. "Energy Relations in Cladophora Glomerata from Lake Erie." Journal of Great Lakes Research 13, no. 3 (January 1987): 279–84. http://dx.doi.org/10.1016/s0380-1330(87)71651-7.

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Pan, Ruijun, Ocean Cheung, Zhaohui Wang, Petter Tammela, Jinxing Huo, Jonas Lindh, Kristina Edström, Maria Strømme, and Leif Nyholm. "Mesoporous Cladophora cellulose separators for lithium-ion batteries." Journal of Power Sources 321 (July 2016): 185–92. http://dx.doi.org/10.1016/j.jpowsour.2016.04.115.

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Furey, Paula C., Rex L. Lowe, Mary E. Power, and Alexis M. Campbell-Craven. "Midges, Cladophora, and epiphytes: shifting interactions through succession." Freshwater Science 31, no. 1 (March 2012): 93–107. http://dx.doi.org/10.1899/11-021.1.

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Higgins, Scott N., Christopher M. Pennuto, E. Todd Howell, Theodore W. Lewis, and Joseph C. Makarewicz. "Urban influences on Cladophora blooms in Lake Ontario." Journal of Great Lakes Research 38 (January 2012): 116–23. http://dx.doi.org/10.1016/j.jglr.2011.11.017.

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Dayton, Aaron I., Martin T. Auer, and Joseph F. Atkinson. "Cladophora, mass transport, and the nearshore phosphorus shunt." Journal of Great Lakes Research 40, no. 3 (September 2014): 790–99. http://dx.doi.org/10.1016/j.jglr.2014.05.010.

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Verma, B. N. "Karyomorphological studies on three species of Cladophora kuetz." CYTOLOGIA 50, no. 1 (1985): 25–30. http://dx.doi.org/10.1508/cytologia.50.25.

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Panayotova, Veselina, Mona Stancheva, and Diana Dobreva. "Alpha-tocopherol and ergocalciferol contents of some macroalgae from Bulgarian Black Sea coast." Analele Universitatii "Ovidius" Constanta - Seria Chimie 24, no. 1 (June 1, 2013): 13–16. http://dx.doi.org/10.2478/auoc-2013-0002.

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AbstractThe aim of the present study was to determine and compare _-tocopherol and ergocalciferol content in four macroalgae from Bulgarian Black sea coast. Ulva rigida, Cladophora vagabunda, Cystoseira barbata and Cystoseira crinita were used for evaluation of corresponding fat soluble vitamins content. The sample preparation procedure includes alkaline saponification, followed by liquid-liquid extraction. Ergocalciferol (vitamin D2) and α-tocopherol (vitamin E) were analyzed simultaneously using HPLC/UV/FL system (Thermo Scientific Spectra SYSTEM) equipped with RP analytical column. The mobile phase was composed of 97:3 = MeOH:H2O. Ergocalciferol was monitored by UV detection at λmax = 265nm, while α-tocopherol was detected by fluorescence at λex=288nm and λem=332nm. Alpha-tocopherol content in algal tissues ranged from 1.68±0.38mg/100g d.w. in Cladophora vagabunda to 29.13±1.08mg/100g d.w. in Cystoseira barbata. Ergocalciferol was detected only in Ulva rigida samples.

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Biris Dorhoi, Elena Suzana, Maria Tofana, Simona Maria Chis, Carmen Elena Lupu, and Ticuta Negreanu Pirjol. "Wastewater Treatment Using Marine Algae Biomass as Pollutants Removal." Revista de Chimie 69, no. 5 (June 15, 2018): 1089–98. http://dx.doi.org/10.37358/rc.18.5.6267.

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The valorification of the marine biomass is an important resource for many industries like pharmaceutical, supplying raw material for the extraction of bioactive substances (vitamins, sterols and collagen), cosmetics, biofertilizers and wastewater treatment. In the last years a special attention has been given to the use of macroalgae. The aim of this study was to emphasize the capacity of two representative green algae species frequent presents on the Romanian shore, Ulva lactuca (L.) and Cladophora vagabunda (L.) Hoek, to remove two usual detergents from wastewater. The green algae washed, dried at room temperature, macerated to powder were introduced into different filter paper for comparison, then immersed in waste water treated with different concentrations of detergents. Tap water was used for the experiment. The results show that Ulva lactuca (L.) species is suitable than Cladophora vagabunda (L.) Hoek species, for wastewater treatment.

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Loureiro, Rafael R., and Renata P. Reis. "Efeito do gradiente de salinidade na taxa fotossintética de Polysiphonia subtilissima, Cladophora vagabunda e Ulva flexuosa subsp. flexuosa na Lagoa Rodrigo de Freitas, Rio de Janeiro, Brasil." Rodriguésia 59, no. 2 (April 2008): 291–96. http://dx.doi.org/10.1590/2175-7860200859202.

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RESUMO Este estudo tem o intuito de testar o desempenho fotossintético das espécies de algas bentônicas mais representativas da Lagoa Rodrigo de Freitas (Polysiphonia subtilissima, Cladophora vagabunda e Ulva flexuosa subsp. flexuosa) em diferentes salinidades, a fim de verificar seus limites de tolerância. Cada amostra foi incubada nas salinidades 10, 15 e 25. Para cada salinidade foram realizadas quatro repetições (luz e escuro). Amostras de 10 mg foram utilizadas para cada espécie, durante aproximadamente 30 minutos de incubação, sob irradiância de 500 ± 5 mmol.m-2·s-1. Polysiphonia subtilissima e Cladophora vagabunda tiveram maior produção fotossintética na salinidade de 15 (P < 0,05). Ulva flexuosa subsp. flexuosa não apresentou diferença em sua taxa fotossintética nas três salinidades (P = 0,09). Os resultados obtidos sugerem que alterações futuras na salinidade da lagoa poderão causar modificações na dinâmica das populações das algas locais.

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Journal articles on the topic 'Cladophora'

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