Algal species diversity and dominance along gradients of stress and disturbance in marine environments

Vegetatio ◽  
1989 ◽  
Vol 83 (1-2) ◽  
pp. 259-267 ◽  
Author(s):  
L. Kautsky ◽  
H. Kautsky
Keyword(s):  
Species Diversity ◽  
Algal Species ◽  
Marine Environments

Algal species diversity of arid region lakes in Kazakhstan and Israel

2009 ◽  
Vol 10 (1) ◽  
pp. 7-16 ◽  
Author(s):  
S. Barinova ◽  
T. Bragina ◽  
E. Nevo
Keyword(s):  
Species Diversity ◽  
Arid Region ◽  
Algal Species

The algal microflora of a string mire in relation to the chemical composition of water

1973 ◽  
Vol 51 (4) ◽  
pp. 743-749 ◽  
Author(s):  
T. Flensburg ◽  
J. H. Sparling
Keyword(s):  
Chemical Composition ◽  
Species Diversity ◽  
Water Flow ◽  
Algal Species ◽  
Chemical Composition Of Water ◽  
Bog Lakes ◽  
Flow Through

Twenty-one samples were examined for algal species diversity. Samples contained between one and 35 species with a mean of 10.6 species per sample. The greatest diversity of species occurred in samples collected from large flarks or bog lakes. Hummock communities, especially those with abundant Sphagnum rubellum contained fewest algae. All samples showed a predominance of Desmidiales.General ionic levels in the string mire were low; however, species of the genera Euastrum, Micrasterias, and Staurastrum occurred frequently in the sites richer in nutrients. More species were found in wetter than in drier sites.The presence of species characteristic of more base-rich conditions may be related to the rate of water flow through the mire.

Intertidal algal species diversity and the effect of pollution

1972 ◽  
Vol 23 (2) ◽  
pp. 73 ◽  
Author(s):  
MA Borowitzka
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
New South ◽  
New South Wales ◽  
Algal Species ◽  
Maximum Value ◽  
South Wales

The species diversity of the larger intertidal algae was determined at three sites along the coastline of Sydney, New South Wales. The changes in species diversity and species composition were correlated with height from mean of low water (MLW), distance from the edge of the rock platform at MLW, and distance from a sewer outfall (i.e. the degree of pollution). The total number of algal species was reduced in the vicinity of the outfall. This reduction was most evident in the Phaeophyceae and the Rhodophyceae. The maximum value of algal species diversity was also reduced at higher levels above MLW, away from the edge of the platform and near the outfalls.

scholarly journals Abundance and Composition of Epiphytic Bacterial and Archaeal Ammonia Oxidizers of Marine Red and Brown Macroalgae

2011 ◽  
Vol 78 (2) ◽  
pp. 318-325 ◽  
Author(s):  
Rosalia Trias ◽  
Arantzazu García-Lledó ◽  
Noemí Sánchez ◽  
José Luis López-Jurado ◽  
Sara Hallin ◽  
...  
Keyword(s):  
Ammonia Oxidation ◽  
Algal Species ◽  
Western Mediterranean ◽  
Marine Macroalgae ◽  
Ammonia Oxidizing Bacteria ◽  
Marine Environments ◽  
Brown Macroalgae ◽  
Content Type ◽  
Western Mediterranean Sea ◽  
Species Specific

ABSTRACTAmmonia-oxidizing bacteria (AOB) and archaea (AOA) are important for nitrogen cycling in marine ecosystems. Little is known about the diversity and abundance of these organisms on the surface of marine macroalgae, despite the algae's potential importance to create surfaces and local oxygen-rich environments supporting ammonia oxidation at depths with low dissolved oxygen levels. We determined the abundance and composition of the epiphytic bacterial and archaeal ammonia-oxidizing communities on three species of macroalgae,Osmundaria volubilis,Phyllophora crispa, andLaminaria rodriguezii, from the Balearic Islands (western Mediterranean Sea). Quantitative PCR of bacterial and archaeal 16S rRNA andamoAgenes was performed. In contrast to what has been shown for most other marine environments, the macroalgae's surfaces were dominated by bacterialamoAgenes rather than those from the archaeal counterpart. On the basis of the sequences retrieved from AOB and AOAamoAgene clone libraries from each algal species, the bacterial ammonia-oxidizing communities were related toNitrosospiraspp. and toNitrosomonas europaeaand only 6 out of 15 operational taxonomic units (OTUs) were specific for the host species. Conversely, the AOA diversity was higher (43 OTUs) and algal species specific, with 17 OTUs specific forL. rodriguezii, 3 forO. volubilis, and 9 forP. crispa. Altogether, the results suggest that marine macroalgae may exert an ecological niche for AOB in marine environments, potentially through specific microbe-host interactions.

Effect of habitat type on algal species diversity and distribution at high altitudes

2020 ◽  
Author(s):  
Nurhayat Dalkıran ◽  
Okan Külköylüoğlu ◽  
Şükran Dere ◽  
Didem Karacaoğlu ◽  
Enis Akay ◽  
...  
Keyword(s):  
Species Diversity ◽  
Algal Species ◽  
Habitat Type ◽  
High Altitudes

Checklist of the marine flora of Nha Trang Bay (Vietnam, South China Sea) and decadal changes in the species diversity composition between 1953 and 2010

2015 ◽  
Vol 58 (5) ◽  
Author(s):  
Eduard A. Titlyanov ◽  
Tamara V. Titlyanova ◽  
Oksana S. Belous
Keyword(s):  
Species Diversity ◽  
Algal Species ◽  
Floristic Composition ◽  
Polluted Water ◽  
Number Of Species ◽  
Green Algal ◽  
Inorganic Substances ◽  
Nha Trang Bay ◽  
History Of ◽  
Green Algal Species

AbstractThe first complete checklist of the intertidal and subtidal marine algae (Rhodophyta, Chlorophyta and Ochrophyta) of Nha Trang Bay (Vietnam) is presented. A brief history of the species records in the bay between 1953 and 2010 is documented. A total of 481 macroalgal taxa and their forms have been found, including 275 red (57%), 121 green (25%) and 85 brown (18%) algal taxa. The data, analyzed in terms of time period, revealed shifts in the number of species in most of the taxonomic families. However, the most interesting differences between the time periods occurred in the overall algal species diversity and in the floristic ratios (red: brown: green algae). The collections sampled in 1953–1968 and those in 1982–1987 did not change significantly in either species diversity or floristic composition, but a comparison of the collections from 1953 to 1987 and from 2002 to 2010 revealed substantial differences. In 2002–2010, the absolute and relative numbers of green algal species increased while those of red and brown algal species decreased. Our background data indicate that this change is likely due to increasing seawater pollution caused by dissolved organic and inorganic substances. The increase in the number of green algal species is due primarily to the greater number of species in the Caulerpaceae, Ulvaceae and Cladophoraceae, all families that thrive in polluted water.

Algal-induced dislodgement as a cause of bivalve mortality on some Scottish beaches

1988 ◽  
Vol 68 (2) ◽  
pp. 219-233 ◽  
Author(s):  
A. D. Ansell ◽  
L. Robb ◽  
H. T. Powell
Keyword(s):  
Species Diversity ◽  
Dominant Species ◽  
Sandy Beach ◽  
East Coast ◽  
Algal Species ◽  
Older Individuals ◽  
Attached Algae ◽  
Large Numbers ◽  
Outer Hebrides ◽  
Three Stages

During July 1984, large numbers of the sandy beach bivalve Donax vittatus (da Costa) were found either stranded in the intertidal, or washing to and fro in the surf on beaches at Dornoch, on the east coast of Scotland. The affected bivalves all carried large growths of several species of algae. The normal burrowing and recovery responses of the bivalves were unable to overcome the increased drag resulting from these epizoic algal colonies so that wave action caused dislodgement from the sand and eventually, stranding and death from dehydration. The resulting mortality affected mainly older individuals in the population; younger individuals had very small or no attached algae and were not dislodged.The algal growths were complex and showed three stages in their development: primary settlements formed generally short tufts or mats attached to the posterior tip of die shell; secondary ‘dominant’ species were also attached to die shell but formed larger growths; tertiary species were attached as epiphytes to the primary and secondary growths. At least eight species of algae were involved. Juvenile mussels (Mytilus edulis L.) were also present in many cases attached to the weed, adding further to die drag.During 1985, at Dornoch, secondary and tertiary algal species developed progressively from overwintering primary settlements, but the size of die algal colonies which developed was generally smaller dian in 1984 and diere was apparently little dislodgement and mortality.Donax vittatus populations on other beaches in die Moray Firdi, and on most other Scottish beaches examined, had fewer individuals with attached algae, and diose affected carried only relatively small colonies which did not prevent normal burrowing. Complex algal colonies, showing even greater species diversity than those of Dornoch were, however, found on D. vittatus on beaches in South Harris, Outer Hebrides, during September 1984.

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