Effect of seasonal succession of algal communities on fouling of MF membrane

The composition and structure of epipelic and planktonic algal communities in Shelter Valley Creek, Ontario, was studied for 1 year. The overall assemblage consisted of 388 taxa of which 321 were Bacillariophyceae. On the sediments, seasonal succession and community structure was, with some exceptions, typical of a hard-water stream in the northern temperate zone. Taxa that occurred frequently throughout the year were Achnanthes minutissima Kütz., Cocconeis placentula var. euglypta (Ehr.) Cl., Gomphonema olivaceum var. balticum Cl., and Navicula tripunctata (O. F. Müller) Bory. The planktonic community was, for the most part, derived from the benthos. Herbivorous grazing by larval sea lamprey, Petromyzon marinus (Pisces: Cyclostomata) did not noticeably affect algal numbers in either the plankton or sediments.Sixty-six taxa are reported as new occurrences in southern Ontario.

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STRUKTUR KOMUNITAS MAKRO ALGA DI PESISIR PULAU KECAMATAN BULANG

SIMBIOSA ◽

10.33373/sim-bio.v3i2.282 ◽

2014 ◽

Vol 3 (2) ◽

Author(s):

Notowinarto Notowinarto ◽

Ramses Ramses ◽

Mulhairi Mulhairi

Keyword(s):

Community Structure ◽

Diversity Index ◽

Algal Species ◽

Algal Communities ◽

Marine Life ◽

Ph Values ◽

Abundance Patterns ◽

Coastal Marine ◽

Temperature Parameter ◽

Important Value Index

Bulang districts Batam Islands of Riau province (Riau Islands), its consists of many islands with as well as having the potential diversity of coastal marine life in particular kinds of macro algae or seaweed. Conducted research aimed to determine the structure of macro- algal communities in the intertidal zone islands. The results of the identification of algal species found 16 species are: the Order of Chlorophyceae as 6 spesies; Order Phaeophyceae as 2 spesies; and Order Rhodophyceae as 8 spesies. The community structure at the five stations showed the highest values were found in the island of dominance Cicir (D ' = 0.79) , uniformity index values on Tengah Island (E ' = 0.99) , while the island Balak had the highest diversity index (H ' = 0.88) , with the abundance patterns of population structure on the island is pretty good Central . Results of correlation analysis of regression between IVI types of algae with the conditions of environmental quality suggests that there is a significance (Fhit ˃ F table and the value of r = > 90 %) between IVI algae Halimeda sp and Cryptarachne polyglandulosa at each station with a temperature parameter surface (⁰C) , depth temperature (⁰C) and pH values. Keywords : Algae, Community Structure, Important Value Index.

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Formation of the Structure of Algal Communities of the Desna River

Hydrobiological Journal ◽

10.1615/hydrobj.v37.i1.20 ◽

2001 ◽

Vol 37 (1) ◽

pp. 11

Author(s):

T. N. Sereda

Keyword(s):

Algal Communities

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Assessment of the Reactions of Algal Communities to Influence of Climatic Factors in the North-Western Black Sea Ecosystem

International Journal on Algae ◽

10.1615/interjalgae.v20.i2.20 ◽

2018 ◽

Vol 20 (2) ◽

pp. 121-134 ◽

Cited By ~ 1

Author(s):

G. G. Minicheva ◽

V. N. Bolshakov ◽

E. S. Kalashnik ◽

A. B. Zotov ◽

A. V. Marinets

Keyword(s):

Black Sea ◽

Climatic Factors ◽

Algal Communities ◽

The North ◽

North Western

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Composition, biomass, and photosynthetic activity of the benthic algal communities in a littoral zone of Lake Baikal in summer

Limnology ◽

10.1007/s102010200021 ◽

2002 ◽

Vol 3 (3) ◽

pp. 175-180 ◽

Cited By ~ 4

Author(s):

K. Nozaki ◽

H. Morino ◽

H. Munehara ◽

V. G. Sideleva ◽

K. Nakai ◽

...

Keyword(s):

Lake Baikal ◽

Littoral Zone ◽

Photosynthetic Activity ◽

Algal Communities

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Seasonal Succession of Bacterial Communities in Three Eutrophic Freshwater Lakes

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18136950 ◽

2021 ◽

Vol 18 (13) ◽

pp. 6950

Author(s):

Bin Ji ◽

Cheng Liu ◽

Jiechao Liang ◽

Jian Wang

Keyword(s):

Water Quality ◽

Surface Water ◽

Water Temperature ◽

Bacterial Communities ◽

Seasonal Succession ◽

Lake Eutrophication ◽

Urban Lake ◽

Freshwater Lakes ◽

Functional Prediction ◽

Bacterial Indicator

Urban freshwater lakes play an indispensable role in maintaining the urban environment and are suffering great threats of eutrophication. Until now, little has been known about the seasonal bacterial communities of the surface water of adjacent freshwater urban lakes. This study reported the bacterial communities of three adjacent freshwater lakes (i.e., Tangxun Lake, Yezhi Lake and Nan Lake) during the alternation of seasons. Nan Lake had the best water quality among the three lakes as reflected by the bacterial eutrophic index (BEI), bacterial indicator (Luteolibacter) and functional prediction analysis. It was found that Alphaproteobacteria had the lowest abundance in summer and the highest abundance in winter. Bacteroidetes had the lowest abundance in winter, while Planctomycetes had the highest abundance in summer. N/P ratio appeared to have some relationships with eutrophication. Tangxun Lake and Nan Lake with higher average N/P ratios (e.g., N/P = 20) tended to have a higher BEI in summer at a water temperature of 27 °C, while Yezhi Lake with a relatively lower average N/P ratio (e.g., N/P = 14) tended to have a higher BEI in spring and autumn at a water temperature of 9–20 °C. BEI and water temperature were identified as the key parameters in determining the bacterial communities of lake water. Phosphorus seemed to have slightly more impact on the bacterial communities than nitrogen. It is expected that this study will help to gain more knowledge on urban lake eutrophication.

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Water quality drives the regional patterns of an algal metacommunity in interconnected lakes

Scientific Reports ◽

10.1038/s41598-021-93178-9 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Min Sung Kim ◽

Seok Hyun Ahn ◽

In Jae Jeong ◽

Tae Kwon Lee

Keyword(s):

Water Quality ◽

Community Assembly ◽

River Flow ◽

Geographical Area ◽

Oxygen Demand ◽

Algal Community ◽

Regional Patterns ◽

Algal Communities ◽

Species Sorting ◽

Metacommunity Structure

AbstractThe metacommunity approach provides insights into how the biological communities are assembled along the environmental variations. The current study presents the importance of water quality on the metacommunity structure of algal communities in six river-connected lakes using long-term (8 years) monitoring datasets. Elements of metacommunity structure were analyzed to evaluate whether water quality structured the metacommunity across biogeographic regions in the riverine ecosystem. The algal community in all lakes was found to exhibit Clementsian or quasi-Clementsian structure properties such as significant turnover, grouped and species sorting indicating that the communities responded to the environmental gradient. Reciprocal averaging clearly classified the lakes into three clusters according to the geographical region in river flow (upstream, midstream, and downstream). The dispersal patterns of algal genera, including Aulacoseira, Cyclotella, Stephanodiscus, and Chlamydomonas across the regions also supported the spatial-based classification results. Although conductivity, chemical oxygen demand, and biological oxygen demand were found to be important variables (loading > |0.5|) of the entire algal community assembly, water temperature was a critical factor in water quality associated with community assembly in each geographical area. These results support the notion that the structure of algal communities is strongly associated with water quality, but the relative importance of variables in structuring algal communities differed by geological regions.

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