ALGAL FLORA IN THE HULA VALLEY—PAST AND PRESENT

1998 ◽  
Vol 46 (2) ◽  
pp. 155-168 ◽  
Author(s):  
Utsa Pollingher ◽  
Tamar Zohary ◽  
Tatiana Fishbein
Keyword(s):  
Algal Species ◽  
Algal Flora ◽  
Species List ◽  
The North ◽  
Hula Valley ◽  
Lake Agmon ◽  
Ca 50 ◽  
Shallow Water Body ◽  
Changes Over Time ◽  
Lake Hula

Lake Agmon, a small shallow water body (area 1.1 km2, mean depth <lm) was created in April 1994 as part of the Hula restoration project in the dried peat-soils of the Hula Valley. Until ca. 50 years ago, this area was covered with swamps, extending to the north of Lake Hula. We followed changes over time in the abundance and species composition of the algal populations in Lake Agmon over the initial 4 years that followed its creation, consolidated the existing information on the algal populations of the extinct Lake Hula, and compared the Lake Agmon algal populations with those reported from Lake Hula and with those present in Lake Rinneret. Altogether, 276 algal species were found in Lake Agmon, including 140 chlorophytes, 48 euglenophytes, 34 cyanophytes, 31 diatoms, 8 cryptophytes, 8 dinoflagellates, and 4 chrysophytes. A comprehensive species list for Lake Hula was also compiled, based on the limited published accounts. The similarities between the past and present algal communities in the Hula Valley were great: most diatom, dinoflagellate, chrysophyte, euglenophyte, and large chlorophyte and cyanophyte genera that are seen today in Lake Agmon were also reported from Lake Hula. However, the Hula list of genera was shorter than the Lake Agmon list in some particular categories. The lack of most of the nannoplanktonic Chlorococcales, and all cryptophytes and other small flagellates from the Hula list was attributed to different sampling and preservation methods in the early days; the absence of most filamentous cyanobacteria is considered a real difference, possibly resulting from the more eutrophic status of Lake Agmon. Notably, the dinoflagellate Peridinium gatunense, which blooms annually in Lake Kinneret downstream of the Hula Valley, was not recorded in Lake Hula and did not occur in Lake Agmon.

MARINE BENTHIC ALGAE FROM COMMANDER ISLANDS (REVISION 2020). I. CHLOROPHYTA AND OCHROPHYTA

2020 ◽  
pp. 82-107
Author(s):  
N.G. Klochkova ◽  
◽  
T.A. Klochkova ◽  
A.V. Klimova ◽  
◽  
...  
Keyword(s):  
Russian Far East ◽  
Scientific Information ◽  
Algal Species ◽  
Far East ◽  
Morphological Characteristics ◽  
Geographic Location ◽  
Algal Flora ◽  
Commander Islands ◽  
Scientific Publications ◽  
Species List

In Commander Islands, the peculiar geographic location, hydrology and geomorphology contributed to de-velopment of a very peculiar algal floristic complex. First scientific information on species composition in this region appeared in XIX century. In this revision, we analyzed scientific publications containing algal floristic information from this region and composed list of species recorded during 1889–2020. We provided information about 52 green and 55 brown algal species recorded from the Commander Islands. The infor-mation concerning representatives of Laminariales is discussed in details, as they form basis of the underwa-ter vegetation. Our species list includes citations of references containing records from the Commander Is-lands and brief description of their biological and morphological characteristics. As we noted, in Russian Far East, Commander Islands belong to one of the few regions with highly examined algal flora.

Biochemical study of attached macroalgae from the Madeira Archipelago and beach-cast macroalgae from the Canary Islands: multivariate analysis to determine bioresource potential

2020 ◽  
Vol 63 (3) ◽  
pp. 283-298
Author(s):  
Nuno Nunes ◽  
Sofia Valente ◽  
Sónia Ferraz ◽  
Maria Carmo Barreto ◽  
Miguel A.A. Pinheiro de Carvalho
Keyword(s):  
Biochemical Study ◽  
Algal Species ◽  
Biochemical Properties ◽  
Total Phenolic ◽  
Total Carotenoids ◽  
The North ◽  
Madeira Archipelago ◽  
Total Carbohydrates ◽  
Beach Cast

AbstractFifteen attached macroalgae from the Madeira Archipelago, comprising three green, three red and nine brown algal species, as well as two beach-cast macroalgal samples, collected along the north shore of Gran Canaria, were assessed for their biochemical properties. The analysis included the determination of total minerals, total carbohydrates, protein, lipids, chlorophyll a, total carotenoids, total phenolic content, fucoxanthin and phycobilins (allophycocyanin, phycocyanin and phycoerythrin). The results showed a high variability of biochemical composition, allowing for the targetting of specific bioresources for particular purposes, including functional foods. This work provides the foundation for a biorefinery strategy implementation plan, for which specific macroalgae may be targeted for valuable and beneficial compounds.

scholarly journals Diversity of Algae and Cyanobacteria and Bioindication Characteristics of the Alpine Lake Nesamovyte (Eastern Carpathians, Ukraine) from 100 Years Ago to the Present

Diversity ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 256
Author(s):  
Petro M. Tsarenko ◽  
Olena P. Bilous ◽  
Olha M. Kryvosheia-Zakharova ◽  
Halyna H. Lilitska ◽  
Sophia Barinova
Keyword(s):  
Species Composition ◽  
Structural Changes ◽  
Algal Species ◽  
Taxonomic Composition ◽  
Alpine Lake ◽  
Algal Flora ◽  
Ecological Analysis ◽  
Modern Species ◽  
Eastern Carpathians ◽  
Infraspecific Taxa

The species diversity and changes in the structural dynamics of the algal flora from the alpine lake Nesamovyte has been studied for 100 years. During the period of investigations, 234 species (245 infraspecific taxa) were revealed to cover more than 70% of the modern species composition of the studied lake. The modern biodiversity of algae is characterized by an increase in the number of widespread forms, a change from the baseline “montane” complex in comparison to the beginning of the 20th century. Nevertheless, the Nesamovyte Lake still has a unique algae composition that is typical for high-mountainous European lakes. The presence of a different complex of conventionally arctic species of algae, in particular, diatoms is discussed. Structural changes in the taxonomic composition of the algal flora of the lake as well as in the complex of the leading genera, species and their diversity are revealed. An ecological analysis of the algal species composition of the lake showed vulnerability and degradation to the ecosystem of the lake. On this basis, the issue regarding the question of protection and preservation of the algae significance and uniqueness of the flora of algae in the Nesamovyte Lake are discussed.

scholarly journals Assessment of diversity and physico-chemical parameters of cyanobacteria, diatoms and other algal species in the paddy fields of Belagavi district, Karnataka

2020 ◽  
Vol 7 (3) ◽  
pp. 378-382
Author(s):  
Santoshkumar Jayagoudar ◽  
Pradeep Bhat ◽  
Ankita Magdum ◽  
Duradundi Sakreppagol ◽  
Laxmi Murgod ◽  
...  
Keyword(s):  
Algal Species ◽  
Soil Samples ◽  
Chemical Parameters ◽  
Range Estimation ◽  
The North ◽  
Physico Chemical ◽  
Water And Soil Samples ◽  
Study Sites ◽  
Good Range

Algae are the diverse group of organisms in the soil and aquatic environment. The role of them in soil fertility enhancement has been extensively studied worldwide. Belagavi is a tropical agricultural belt in the North Karnataka region with highly fertile soil. Water and soil samples were collected randomly from the paddy field of 15–20 well-distributed spots in 4 selected locations viz Kusumali, Jamboti, Kinaye and Piranwadi. The identification revealed the presence of 94 species and 71 genera in the investigated sites. Among all, 62 species belonged to Bacillariophyceae, 14 species to Chlorophyceae, 10 species to Cyanophyceae, 3 to Xanthophyceae, followed by Trebouxiophyceae and Zygnematophyceae (2 species each) and one species of Ulvophyceae. The maximum number of 62 species was recorded from Kusamali, followed by 49 species in Kinaye, 44 in Jamboti and 35 in Piranwadi. The month of February had the highest number of species (61), decreased to 45 in March, 42 in April and 37 in May. Among the physicochemical parameters analysed for the soil samples, it was found that the pH of the soil is slightly acidic in all the study sites ranged between 5.03–5.85. Further, the electrical conductivity (EC) varied from 0.27–0.345 dS/m, found to be in a good range. Estimation of available micro and macronutrients of soil were measured, and it was found to be at low to moderate levels. The present study indicates the extensive distribution of different classes of algae in the rice fields of four study locations in Belagavi.

scholarly journals SPREADING OF BRINE DISCHARGED INTO THE PUCK BAY (SOUTH BALTIC SEA): THEORETICAL STUDY VERSUS FIELD OBSERVATIONS

2012 ◽  
Vol 1 (33) ◽  
pp. 20
Author(s):  
Malgorzata Robakiewicz
Keyword(s):  
Baltic Sea ◽  
Natura 2000 ◽  
Regional Administration ◽  
The North ◽  
North Eastern ◽  
Shallow Water Body ◽  
Wind Driven Currents ◽  
Oil Company ◽  
North Eastern Part ◽  
Puck Bay

Increasing demands for gas storage capacity encouraged Polish Gas and Oil Company (PGNiG) to make use of salt deposits located in the north-eastern part of Poland, in the area bordering on the Gulf of Gdańsk (South Baltic Sea), and create underground gas stores. A complex of 10 chambers (250x106 m3) was designed to be built at a depth of 800-1600 m. The construction site is located about 4 km away from the sea coast. The drilling of boreholes and diluting of salt rock was proposed as a method of creating the chambers. Owing to ecological reasons, maximum discharge of brine is limited to 300 m3/h with the max. saturation of 250 kg/m3. The Puck Bay is a shallow water body with wind-driven currents and negligible tides. The main difficulty of the investment lay in the effective spreading of brine in the Puck Bay in accordance with all requirements that apply to regions protected by NATURA 2000. The most important restriction was the permitted excess salinity, defined as 0.5 PSU over the natural salinity in the Puck Bay. The location of brine discharge, number and diameters of nozzles, as well as consequences of brine discharge on the Puck Bay water, had been analyzed before the permission to install the system of diffusers was granted by the regional administration. The installation consists of a system of 16 heads spaced every 45 m, each of them equipped with 3 nozzles of 8 mm diameter.

The Hula project: N and P dynamics in Lake Agmon and pollutants removal from the Kinneret inputs

2000 ◽  
Vol 42 (1-2) ◽  
pp. 117-122 ◽  
Author(s):  
M. Gophen
Keyword(s):  
Potential Effect ◽  
Lake Kinneret ◽  
Nutrient Loads ◽  
Land Owners ◽  
Hula Valley ◽  
Lake Agmon ◽  
Nutrient Influx ◽  
Agricultural Use ◽  
Reclamation Project ◽  
Pollutants Removal

During the 1950s the natural Lake Hula and swamps were dried and more than 65×106 m2 of wetland area with a unique natural composition of fauna and flora was turned over to agricultural use. Forty five years later 5.5×106 m2 of this area went through processes causing soil deterioration and a reclamation project was proposed for these soils. The proposal was implemented aimed at ensuring income resource to the land owners and to remove pollutants from the Lake Kinneret inputs. It was found that the newly created (1994) Lake Agmon is acting as a nitrogen sink and the phosphorus is recycled by submerged macrophytes. Long term records of nutrient influx from the catchment (with Hula Valley being major contributor) into Lake Kinneret indicates a decline of organic nitrogen and an increase of SRP. The potential effect of nutrient loads reduction by the Hula Project is presented.

Diversity, relative abundance, new locality records, and updated fish fauna of the Ross Sea region

2013 ◽  
Vol 25 (5) ◽  
pp. 619-636 ◽  
Author(s):  
Stuart M. Hanchet ◽  
Andrew L. Stewart ◽  
Peter J. McMillan ◽  
Malcolm R. Clark ◽  
Richard L. O'Driscoll ◽  
...  
Keyword(s):  
Ross Sea ◽  
Fish Fauna ◽  
Demersal Fish ◽  
Fish Distribution ◽  
Distribution Data ◽  
Mesopelagic Fish ◽  
Species List ◽  
The North ◽  
Evenness Indices ◽  
Total Species

AbstractTwo surveys were carried out in the Ross Sea region during February and March 2004 and 2008 from the New Zealand RVTangaroa. Fishes were sampled on the continental shelf and slope of the Ross Sea, and on adjacent seamounts to the north, mainly using a large demersal fish trawl and a large mesopelagic fish trawl. Parts of the shelf and slope were stratified by depth and at least three random demersal trawls were completed in each stratum, enabling biomass estimates of demersal fish to be calculated. Fish distribution data from these two surveys were supplemented by collections made by observers from the toothfish fishery. A diverse collection of over 2500 fish specimens was obtained from the two surveys representing 110 species in 21 families. When combined with previous documented material this gave a total species list of 175, of which 135 were from the Ross Sea shelf and slope (to the 2000 m isobath). Demersal species-richness, diversity and evenness indices all decreased going from the shelf to the slope and the seamounts. In contrast, indices for pelagic species were similar for the slope and seamounts/abyss but were much lower for the shelf.

scholarly journals Algae Diversity and Ecology during a Summer Assessment of Water Quality in the Abraham Lincoln Birthplace National Historical Park, USA

Diversity ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 206 ◽  
Author(s):  
Sophia Barinova ◽  
Thomas Smith
Keyword(s):  
Water Quality ◽  
Algal Species ◽  
Benthic Algae ◽  
Water Quality Assessment ◽  
Abraham Lincoln ◽  
Algal Flora ◽  
Diatom Algae ◽  
Class 1 ◽  
Red Algal ◽  
The Usa

There were 88 species of algae and cyanobacteria observed from seven sites in the Abraham Lincoln Birthplace National Historical Park (Hodgenville, Kentucky, USA). This was the first algal investigation study in the park. There were 21 samples collected, during the summer, on 16 July 2008. Algal flora, dominated by diatoms was represented by 54 species identified (61.4% of the total), 20 species of cyanobacteria, 11 green and two charophyte algal species, and one red algal species (22.7%, 12.5%, 2.2%, and 1.1%, respectively). Benthic diatoms dominated the aquatic system with 14 species of Navicula and 12 species of Nitzschia identified, which was 15.7% and 13.5% of the total, respectively. Species tended to be site specific and 78.6% of the species were only found in two or less sites. The bioindicator methods for water quality assessment were based on species autoecology. This method was used for the first time in the USA during this study. This demonstrated that benthic and planktonic-benthic algae preferred temperate temperatures, middle-oxygenated mesotrophic waters, low-to-middle enriched by chlorides. The waters were well oxygenated, sometimes saturated by sulfides, low-alkaline, low-to-middle organic enriched, and of class 1–3 water quality with high self-purification capacity. This is very important for habitat protection and cannot be easily accomplished strictly through chemical analysis. The diversity of diatom algae not only plays a major role in the formation of algal communities and their uniqueness, but diatom algae can be a good indicator of environmental assessments and change.

A submerged late-Quaternary deposit at Roddans Port on the north-east coast of Ireland

1965 ◽  
Vol 249 (758) ◽  
pp. 221-255 ◽  
Keyword(s):  
Local Development ◽  
Late Quaternary ◽  
Algal Species ◽  
Late Glacial ◽  
Red Clay ◽  
Quaternary Deposit ◽  
Radiocarbon Dates ◽  
North East ◽  
The North ◽  
Pollen Analyses

Recent coastal erosion has cut into the filling of a former inter-drumlin lake and exposed an excellent sequence of Late-glacial deposits. These have been investigated by pollen analyses, identification of seeds, Mollusca, ostracods, and Algae; by stratigraphic studies and by radiocarbon dating. The coincidence of all this evidence strongly confirms that the greater part of the depositional sequence embraces the north-west European Late-glacial stages of the Older and Younger Dryas or Salix herbacea clays, with the intervening milder Allerod oscillation. This sequence is overlain by a small thickness of Post-glacial peat. The Late- and Post-glacial filling is shown to be sandwiched between deposits laid down during two phases of marine submergence; the earlier transgression is represented by a red marine clay which had a widespread occurrence on the Co. Down coast, and the later transgression is represented by the local development of the Postglacial raised beach. The pollen analyses from the close sampling of the organic Allerød phase muds have yielded unusually detailed data on vegetational conditions in the Late-glacial period. The radiocarbon dates, while fully confirming the age attribution, have not enough precision to give a close measure of the duration of the Allerød phase. The pollen evidence on vegetation and climate is augmented and clarified by identifications of seeds, shells, ostracods and Algae. The ostracods confirm the marine character of the early red clay, and freshwater shells were found in the overlying Allerød mud. The algal species from the Late-glacial layers have been compared with recent algal floras from Ireland, and with those found in Late- and Inter-glacial sediments elsewhere. The most notable feature is the prominence of species representative of a base-rich habitat.

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