U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject Chlorophyta Remove constraint Subject: Chlorophyta Subject Bacillariophyceae Remove constraint Subject: Bacillariophyceae
Start Over

Search

210  Search Results

« Previous | 1 - 20 of 210 |
Number of results to display per page

Search Results

1. Dominance of harmful algae, Microcystis spp. and Micrasterias hardyi, has negative consequences for bivalves in a freshwater lake

Author:
Megumu Fujibayashi; Seiko Furuta; Eiso Inoue; Satoshi Ichise; Naoko Takei
Source:
Harmful algae 2021 v.101 pp. 101967
ISSN:
1568-9883
Subject:
Bacillariophyceae; Chlorophyta; Corbicula; Micrasterias; Microcystis aeruginosa; carbon; condition factor; fatty acid composition; fatty acids; filtration; fisheries; food quality; freshwater; freshwater lakes; occupations; stomach
Abstract:
... The proliferation of cyanobacteria Microcystis spp. and the invading green alga Micrasterias hardyi in Lake Biwa has been increasing. However, the available knowledge on the dietary utilization of these cyanobacterial and algal species by bivalves, which are key species in lake ecosystems, is limited. In this study, we examined the dietary quality and utilization of these species by freshwater biv ...
DOI:
10.1016/j.hal.2020.101967

2. Phytoplankton Community Structure in Highly-Mineralized Small Gypsum Karst Lake (Russia)

Author:
Alexander Okhapkin; Ekaterina Sharagina; Pavel Kulizin; Natalja Startseva; Ekaterina Vodeneeva
Source:
Microorganisms 2022 v.10 no.2 pp. -
ISSN:
2076-2607
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; Cyclotella; Ochrophyta; Russia; aquifers; basins; biomass; brackish water; community structure; deciduous forests; dominant species; ecotones; gypsum; habitats; karsts; lakes; mineralization; phytoplankton; rare species
Abstract:
... Gypsum karst lakes are unique water ecosystems characterized by specific habitat conditions for living organisms, including phytoplankton species, as primary producers and mediating biogeochemical cycles in the water bodies. Studies of diversity and structure of phytoplankton communities can be used to identify the specific and typical lake features and plan basin-wide monitoring. The aim of this ...
DOI:
10.3390/microorganisms10020386

3. Biotope and biocenosis of cryoconite hole ecosystems on Ecology Glacier in the maritime Antarctic

Author:
Jakub Buda; Edyta Łokas; Mirosława Pietryka; Dorota Richter; Wojciech Magowski; Nataliia S. Iakovenko; Dorota L. Porazinska; Tomasz Budzik; Mariusz Grabiec; Jakub Grzesiak; Piotr Klimaszyk; Paweł Gaca; Krzysztof Zawierucha
Source:
Science of the total environment 2020 v.724 pp. 138112
ISSN:
0048-9697
Subject:
Acari; Bacillariophyceae; Chlorophyta; Pseudanabaena; Rotifera; algae; altitude; biodiversity; biomass; biotopes; cesium radioisotopes; community structure; dominant species; ecosystems; glaciers; invertebrates; lead; microbial communities; models; organic matter; plutonium; radioactivity; sediments; suspension feeding; Antarctic region
Abstract:
... Despite recent great interest in glacier ecosystems in the continental Antarctic, little is known about their maritime counterparts. Our study presents descriptive data on cryoconite sediments and cryoconite holes on Ecology Glacier (King George Island) to accomplish three main objectives: (a) to identify main eukaryotic (algae, invertebrates) and prokaryotic (cyanobacteria) components of microbia ...
DOI:
10.1016/j.scitotenv.2020.138112

4. Characteristics of spatial distribution for microbial ecology inside and outside source water reservoir

Author:
Jun Guo; Yuanyuan Zheng; Jinhao Teng; Xumin Wang; Jiaxiu Song
Source:
Journal of cleaner production 2021 v.311 pp. 127697
ISSN:
0959-6526
Subject:
Actinobacteria; Bacillariophyceae; Bacteroidia; Chlorophyta; Chytridiomycota; Cryptomonadaceae; Cyanobacteria; Sclerotiniaceae; Verrucomicrobia; denitrification; environmental impact; eutrophication; internal transcribed spacers; microbial communities; odors; oxidation; ribosomal RNA; risk; water flow; water reservoirs
Abstract:
... Although the steady-state transition caused by ecological changes is well known, the microorganisms involved are rarely understood. Gradual microbial community changes induced by the storage and operation of reservoirs were investigated in this study. Microbial 16S rRNA (16S ribosomal RNA) and ITS (Internal Transcribed Spacer) genes were analyzed by high-throughput sequencing to explore the microb ...
DOI:
10.1016/j.jclepro.2021.127697

5. Feeding habits and trophic levels of cichlid species in tropical reservoir, Lake Nasser, Egypt

Author:
Kariman A. Sh. Shalloof; Alaa M. El-Far; Walid Aly
Source:
Egyptian Journal of Aquatic Research (Online) 2020 v.46 no.2 pp. 159-165
ISSN:
2090-3278
Subject:
Bacillariophyceae; Chlorophyta; Oreochromis niloticus; Sarotherodon; animal-based foods; animals; aquatic ecosystems; aquatic plants; autumn; digestive system; energy transfer; females; fish feeding; fisheries; lakes; males; plant tissues; sand; spring; trophic levels; Egypt
Abstract:
... Information on fish feeding habits and trophic levels shed light on trophic profiles and energy transfer within the aquatic ecosystem. In this study, tilapias (Oreochromis niloticus, Sarotherodon galilaeus, and Coptodon zillii) samples from commercial fisheries of Lake Nasser were collected during autumn 2015 and spring 2016, and gut contents were examined. Results showed that plant tissue was mor ...
DOI:
10.1016/j.ejar.2020.04.001

6. Global retrieval of phytoplankton functional types based on empirical orthogonal functions using CMEMS GlobColour merged products and further extension to OLCI data

Author:
Hongyan Xi; Svetlana N. Losa; Antoine Mangin; Mariana A. Soppa; Philippe Garnesson; Julien Demaria; Yangyang Liu; Odile Hembise Fanton d'Andon; Astrid Bracher
Source:
Remote sensing of environment 2020 v.240 pp. 111704
ISSN:
0034-4257
Subject:
Bacillariophyceae; Chlorophyta; Haptophyta; Miozoa; algorithms; chlorophyll; color; data collection; environmental monitoring; latitude; models; phytoplankton; pigments; prokaryotic cells; reflectance; remote sensing; satellites
Abstract:
... This study presents an algorithm for globally retrieving chlorophyll a (Chl-a) concentrations of phytoplankton functional types (PFTs) from multi-sensor merged ocean color (OC) products or Sentinel-3A (S3) Ocean and Land Color Instrument (OLCI) data from the GlobColour archive in the frame of the Copernicus Marine Environmental Monitoring Service (CMEMS). The retrieved PFTs include diatoms, haptop ...
DOI:
10.1016/j.rse.2020.111704

7. Ice Melting Can Change DMSP Production and Photosynthetic Activity of the Haptophyte Phaeocystis antarctica1

Author:
Sohiko Kameyama; Maki Otomaru; Andrew McMinn; Koji Suzuki
Source:
Journal of phycology 2020 v.56 no.3 pp. 761-774
ISSN:
0022-3646
Subject:
Bacillariophyceae; Chlorophyta; Phaeocystis; chlorophyll; dimethyl sulfide; dimethylsulfoniopropionate; fluorometry; hypersalinity; light intensity; melting; photochemistry; photosystem II; phytoplankton; sea ice; seawater; specific growth rate; sulfur
Abstract:
... Phaeocystis antarctica is an important primary producer in the Southern Ocean and plays roles in sulfur cycles through intracellular production of dimethylsulfoniopropionate (DMSP), a principal precursor of dimethyl sulfide (DMS). Haptophytes, including P. antarctica, are known to produce more DMSP than other phytoplankton groups such as diatoms and green algae, suggesting their important contribu ...
DOI:
10.1111/jpy.12985

8. In situ assessment of metal toxicity in riverine periphytic algae as a tool for biomonitoring of fluvial ecosystems

Author:
Lalit K. Pandey
Source:
Environmental technology & innovation 2020 v.18 pp. 100675
ISSN:
2352-1864
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; algae; cell walls; chlorophyll; copper; ecosystems; environmental monitoring; growth retardation; heavy metals; lead; lipid bodies; metal ions; periphyton; pollution; rivers; species richness; summer; toxicity; wet season; winter; zinc
Abstract:
... The combined effects of seasonality and in situ heavy metal (Cu, Zn, Pb) enrichment on periphyton in a large river was experimentally studied using metal-diffusing substrates Highest release rate and intracellular accumulation of metal ions (Cu, Zn and Pb) was examined in rainy and summer seasons, respectively. Release rate and intracellular accumulation showed the following order: Zn > Cu > Pb in ...
DOI:
10.1016/j.eti.2020.100675

9. In-situ responses of phytoplankton to graphene photocatalysis in the eutrophic lake Xingyun, southwestern China

Author:
Yun Zhang; Hucai Zhang; Fengqin Chang; Ping Xie; Qi Liu; Lizeng Duan; Han Wu; Xiaonan Zhang; Wei Peng; Fengwen Liu; Liang Xu
Source:
Chemosphere 2021 v.278 pp. 130489
ISSN:
0045-6535
Subject:
Anabaena; Aphanizomenon; Bacillariophyceae; Chlorophyta; Cryptista; Euglenozoa; Microcystis; community structure; dissolved oxygen; dissolved phosphorus; eutrophication; graphene; lakes; phosphorus; photocatalysis; phytoplankton; species richness; sustainable technology; total nitrogen; total phosphorus; China
Abstract:
... Graphene photocatalysis is receiving increased attention for its potential to be used as a novel green technology for mitigating harmful algae in highly eutrophic waters. However, graphene is seldom applied to in situ aquatic ecosystems for environmental applications. Here, the impacts of graphene photocatalysis on phytoplankton and environmental conditions were evaluated through an in situ macroc ...
DOI:
10.1016/j.chemosphere.2021.130489

10. Influence of Temperature and CO2 On Plasma‐membrane Permeability to CO2 and HCO3− in the Marine Haptophytes Emiliania huxleyi and Calcidiscus leptoporus (Prymnesiophyceae)

Author:
Sonia Blanco‐Ameijeiras; Heather M. Stoll; Hongrui Zhang; Brian M. Hopkinson
Source:
Journal of phycology 2020 v.56 no.5 pp. 1283-1294
ISSN:
0022-3646
Subject:
Bacillariophyceae; Calcidiscus; Chlorophyta; Emiliania huxleyi; algae; bicarbonates; calcium carbonate; carbon dioxide; carbonate dehydratase; catalytic activity; inorganic carbon; lipid composition; models; permeability; photosynthesis; plasma membrane; proteins; temperature
Abstract:
... Membrane permeabilities to CO₂ and HCO₃⁻ constrain the function of CO₂ concentrating mechanisms that algae use to supply inorganic carbon for photosynthesis. In diatoms and green algae, plasma membranes are moderately to highly permeable to CO₂ but effectively impermeable to HCO₃⁻. Here, CO₂ and HCO₃⁻ membrane permeabilities were measured using an ¹⁸O‐exchange technique on two species of haptophyt ...
DOI:
10.1111/jpy.13017

11. Metabarcoding analysis of harmful algal species in Jiaozhou Bay

Author:
Shuya Liu; Kate Gibson; Zongmei Cui; Yang Chen; Xiaoxia Sun; Nansheng Chen
Source:
Harmful algae 2020 v.92 pp. 101772
ISSN:
1568-9883
Subject:
Bacillariophyceae; Cercozoa; Chlorophyta; Ciliophora; Cryptista; DNA barcoding; Haptophyta; Heterocapsa; Ochrophyta; Skeletonema marinoi; algal blooms; coastal ecosystems; cryptic species; environmental factors; phytoplankton; poisonous algae; predation; prediction; species identification; temperature; China
Abstract:
... Accurate detection of the composition and dynamics of harmful algal bloom (HAB) species is critical for studying the mechanisms of HAB formation and for developing means for predicting the occurrences of HABs. Jiaozhou Bay is an epitome of China’s coastal ecosystem and an ideal site for HAB research with the accumulation of decades of historical investigation records. Nevertheless, most of these e ...
DOI:
10.1016/j.hal.2020.101772

12. Nutrient attenuation in a shallow, gravel-bed river. I. In-situ chamber experiments

Author:
John M. Quinn; J. Christopher Rutherford; Sherry J. Schiff
Source:
New Zealand journal of marine and freshwater research 2020 v.54 no.3 pp. 393-409
ISSN:
1175-8805
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; carbon dioxide fixation; chlorophyll; computer simulation; dissolved inorganic nitrogen; diurnal variation; nutrient uptake; nutrients; oxygen; pH; periphyton; photosynthesis; reactive phosphorus; recycling; rivers; stoichiometry
Abstract:
... Dissolved nutrient uptake and metabolism by periphyton in a central North Island gravel-bed river were investigated using recirculating in-situ chambers. Dissolved inorganic nitrogen (DIN) uptake was correlated with photosynthesis and chlorophyll but N uptake and carbon fixation were partly de-coupled indicating storage. Dissolved reactive phosphorus (DRP) uptake was only weakly correlated with ph ...
DOI:
10.1080/00288330.2020.1740284

13. Response of benthic algae to environmental conditions in an urban lake recovered from eutrophication, China

Author:
Tao Wang; Qing Wang; Shuang Xia; Chunlan Yan; Guofeng Pei
Source:
Journal of oceanology and limnology 2020 v.38 no.1 pp. 93-101
ISSN:
2096-5508
Subject:
Bacillariophyceae; Chlorophyta; algae; benthic organisms; biomass; environmental factors; epiphytes; eutrophication; habitats; lakes; littoral zone; long term effects; macrophytes; nutrient content; physicochemical properties; primary productivity; species richness; China
Abstract:
... Benthic algae communities dominate the primary production in littoral zone of shallow lake. To understand the long-term effect of alteration in the composition of benthic algae community assemblage in such as a lake in China, we analyzed the benthic algae developments and indicators in the Donghu Lake in Wuhan, central China in 2004 and 2014. We compared the benthic algae biomass, compositions, an ...
DOI:
10.1007/s00343-019-8362-z

14. Temperature mainly determines the temporal succession of the photosynthetic picoeukaryote community in Lake Chaohu, a highly eutrophic shallow lake

Author:
Xiaoli Shi; Shengnan Li; Min Zhang; Changqing Liu; Qinglong Wu
Source:
Science of the total environment 2020 v.702 pp. 134803
ISSN:
0048-9697
Subject:
Bacillariophyceae; Chlorophyta; Chytridiomycota; Cryptista; community structure; eutrophication; flow cytometry; fungi; high-throughput nucleotide sequencing; lakes; niches; photosynthesis; ribosomal DNA; temperature
Abstract:
... Photosynthetic picoeukaryotes (PPEs) are key players in aquatic systems, while their diversity and community composition dynamics remain poorly understood. The monthly composition of PPEs in Lake Chaohu was investigated using a combination of flow cytometry sorting and high throughput sequencing. Results indicated that temperature is the most important factor shaping PPEs community structure. The ...
DOI:
10.1016/j.scitotenv.2019.134803

15. What Triggers the Annual Cycle of Cyanobacterium Oscillatoria sp. in an Extreme Environmental Sulfide-Rich Spa?

Author:
Andreas Reul; Elena Martín-Clemente; Ignacio J. Melero-Jiménez; Elena Bañares-España; Antonio Flores-Moya; María J. García-Sánchez
Source:
Water 2020 v.12 no.3 pp. -
ISSN:
2073-4441
Subject:
Bacillariophyceae; Chlorophyta; Cryptophyceae; Miozoa; Oscillatoria; air temperature; ammonium; chlorophyll; databases; diameter; exhibitions; fluorometry; models; nitrates; nutrients; phosphates; phytoplankton; population; seasonal variation; sulfides; summer; water; winter; Spain
Abstract:
... A seasonal cycle of sulfide, nitrate, phosphate, ammonium, chlorophyll a (Chl a) and Oscillatoria sp. abundance (<100 μm), as well as the relative contribution of taxonomic phytoplanktonic groups (cyanobacteria, green algae, cryptomonads, diatoms and dinoflagellates) to total Chl a were measured by fluorometric measurements at La Hedionda sulfide-rich spa (southern Spain). Fluorometry determined t ...
DOI:
10.3390/w12030883

16. Approach deliberation for source identification of sedimentary organic matters via comparing freshwater lakes with multi-ecotypes

Author:
Xiaoguang Xu; Wei Li; Hui Deng; Megumu Fujibayashi; Munehiro Nomura; Osamu Nishimura; Guoxiang Wang
Source:
Science of the total environment 2019 v.649 pp. 327-334
ISSN:
0048-9697
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; Miozoa; Nelumbo; Nymphoides; Phragmites; Trapa; bacteria; biomarkers; ecotypes; eutrophication; fatty acid composition; fatty acids; freshwater ecosystems; freshwater lakes; microalgae; organic matter; plants (botany); sediments; stable isotopes; statistical models; China; Japan
Abstract:
... Despite of the importance of understanding the sediment quality for lacustrine management, the source evaluation of sedimentary organic matter (SOM) in freshwater lakes is still insufficient. In this study, two shallow eutrophic lakes of Lake Taihu, China and Lake Izunuma, Japan were systematically investigated. Results of fatty acid profiles demonstrated that a wide range of organic matters, vary ...
DOI:
10.1016/j.scitotenv.2018.08.236

17. Assessing aquatic ecosystem health through the analysis of plankton biodiversity

Author:
N. F. Shao; S. T. Yang; Y. Sun; Y. Gai; C. S. Zhao; F. Wang; X. Yin; B. Dong
Source:
Marine & freshwater research 2019 v.70 no.5 pp. 647-655
ISSN:
1323-1650
Subject:
Bacillariophyceae; Chlorophyta; Cladocera; Cyanobacteria; Protozoa; Rotifera; anthropogenic activities; autumn; biodiversity; cities; developing countries; ecological restoration; environmental health; food webs; freshwater; freshwater ecosystems; health effects assessments; health status; models; monitoring; phytoplankton; rivers; spring; summer; zooplankton; China
Abstract:
... Healthy plankton communities are the foundation of many freshwater food webs. Their biodiversity is often used to directly reflect the health of the rivers. Globally, river ecosystem restoration is a critical issue and many freshwater ecosystems, especially in cities, are degraded because of intensive human activities. This is true for Jinan, China’s first pilot city for the Water Ecological Civil ...
DOI:
10.1071/MF18342

18. Combined effects of elevated carbon dioxide and temperature on phytoplankton-zooplankton link: A multi-influence of climate change on freshwater planktonic communities

Author:
Wei Li; Xiaoguang Xu; Jingmei Yao; Nobuyuki Tanaka; Osamu Nishimura; Hua Ma
Source:
Science of the total environment 2019 v.658 pp. 1175-1185
ISSN:
0048-9697
Subject:
Bacillariophyceae; Chlorophyta; Cyanobacteria; Daphnia magna; algae; algae culture; biomass; carbon; carbon dioxide; carbon dioxide enrichment; climate change; fatty acid composition; freshwater; freshwater ecosystems; phosphorus; phytoplankton; polyunsaturated fatty acids; temperature; zooplankton
Abstract:
... It is essential to understand the combined effects of elevated CO₂ and temperature on phytoplankton-zooplankton link when attempting to predict climate change responses of freshwater ecosystems. Phytoplankton species differ in stoichiometric and fatty acids composition, and this may result in phytoplankton-mediated effect on zooplankton at elevated CO₂ and temperature. Beyond the isolated analysis ...
DOI:
10.1016/j.scitotenv.2018.12.180

19. Comparison of fluorometric and microscopical quantification of phytoplankton in a drinking water reservoir by a one-season monitoring program

Author:
A. Hartmann; H. Horn; I. Röske; K. Röske
Source:
Aquatic sciences 2019 v.81 no.1 pp. 19
ISSN:
1015-1621
Subject:
Bacillariophyceae; Chlorophyta; Cryptista; Microcystis; aquatic ecosystems; chlorophyll; drinking water; fluorescence; fluorometry; labor; microscopy; monitoring; phytoplankton; species diversity; surveys; water reservoirs
Abstract:
... Phytoplankton are key components in aquatic ecosystems and therefore an important target of monitoring analyses. Microscopical counting, although providing most detailed results, is time and labor intensive and requires highly skilled analysts. In situ spectral fluorescence measurements provide a much faster analysis with a higher spatiotemporal resolution. A one-season survey of phytoplankton ass ...
DOI:
10.1007/s00027-018-0608-x

20. Diatom genes originating from red and green algae: Implications for the secondary endosymbiosis models

Author:
A.A. Morozov; Yuri P. Galachyants
Source:
Marine genomics 2019 v.45 pp. 72-78
ISSN:
1874-7787
Subject:
Bacillariophyceae; Chlorophyta; algae; ancestry; data collection; endosymbionts; genes; models; photosynthesis; proteome; symbiosis
Abstract:
... Previous phylogenomic analyses of diatoms have discovered some plastid-targeted genes apparently coming from green algae. Number of these genes varied from less than a half of EGT-compatible genes to an overwhelming majority, and their presence was treated as an evidence of cryptic green plastid. We have performed such an analysis with a novel weighted approach on an extended dataset of diatom gen ...
DOI:
10.1016/j.margen.2019.02.003