scholarly journals Seasonal variability of near-surface zooplankton community structure in the southern Gulf of Mexico

2020 ◽  
Vol 48 (4) ◽  
pp. 649-661
Author(s):  
Leonardo Cruz-Rosado ◽  
Wilfrido M. Contreras-Sánchez ◽  
Ulises Hernández-Vidal ◽  
Jaime Gómez-Gutiérrez ◽  
María de Jesús Contreras-García ◽  
...  
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Zooplankton Community ◽  
River System ◽  
Dry Season ◽  
Zooplankton Community Structure ◽  
Near Surface ◽  
Southern Gulf Of Mexico ◽  
Summer Storm ◽  
Taxonomic Groups

The zooplankton taxonomic group composition was analyzed in a known spawning area for snooks of the family Centropomidae during March 2011-February 2012 near the González River's mouth, a tributary of the Grijalva-Usumacinta River system, discharging into the southern Gulf of Mexico. Zooplankton was collected near the surface using three distinct zooplankton nets (20, 64, and 120 μm). Sixteen zooplankton taxonomic groups were collected between the three nets. Copepoda (76.9%), Trematoda (6.7%), Bivalvia (4.6%), and Chaetognatha (Sagittoidea 4.3%) numerically dominated zooplankton community structure. The 120 and 64 μm nets collected the highest diversity of zooplankton (15 taxa). Zooplankton was more abundant during June-October (summer storm season). They associated with lower salinities (due to the increase in the discharge volume of the Grijalva-Usumacinta River system) and higher regional primary productivity than observed during the rest of the year (March-May, dry season, and November-February, winter storm season). The highest peak of zooplankton abundance was found in November during the beginning of winter storms. Nine taxonomic groups were observed frequently and abundantly during the summer storm season, while only five taxonomic groups were abundant during the dry season.

scholarly journals Zooplankton community structure of Volzhsko-Kamsky National Nature Reserve

2016 ◽  
Vol 320 (3) ◽  
pp. 294-303
Author(s):  
O.Y. Derevenskaya ◽  
E.N. Unkovskaya
Keyword(s):  
Water Quality ◽  
Community Structure ◽  
Nature Reserve ◽  
Zooplankton Community ◽  
Water Quality Assessment ◽  
Taxonomic Composition ◽  
Eutrophic Lakes ◽  
Middle Volga Region ◽  
Zooplankton Community Structure ◽  
Taxonomic Groups

Long-term studies had been held on the lakes of the Volga-Kama State Natural Reserve (Russia). The aim of our research was to study the biodiversity of planktonic rotifers and crustaceans, zooplankton community structure characteristics and also water quality assessment with bioindication methods. 137 species of zooplankton were identified in our research. In all lakes rotifers were presented by highest number of species. The lowest number ofspecies was found for copepods. In general, the species composition of zooplankton is typical for eutrophic lakes of Middle Volga region. The species most commonly found in lakes are indicators of eutrophic waters. We also analyzed and compared the structure of zooplankton communities and taxonomic composition in different types of nature reserve lakes. It was shown that changing the relationship between taxonomic groups of zooplankton and increase of rotifers in the community is also a sign of eutrophication. According to the abundance rotifers dominated in most lakes. Drastic changes in quantitative indicators of zooplankton during the growing season, due to an increase in the abundance of one of the species were typical of eutrophic lakes of the reserve. Studies have shown that in meso-eutrophic and eutrophic lakes the indicators that reflect the structure of the zooplankton community are the most informative for the assessment of the water quality. Lakes Raifskoe and Ilinskoe were the least polluted, and characterized by the structure of communities of mesotrophic type. The rest of the lakes are more prone to eutrophication processes and community structure of zooplankton corresponds to eutrophic lakes type.

THE STUDY ON THE EFFECT OF ELODEA NUTTALLII TO ZOOPLANKTON COMMUNITY STRUCTURE

2009 ◽  
Vol 33 (3) ◽  
pp. 556-561
Author(s):  
Gui-Jun YANG ◽  
Bo-Qiang QIN ◽  
Guang GAO ◽  
Xiao-Dong WANG ◽  
Hong-Yan WANG
Keyword(s):  
Community Structure ◽  
Zooplankton Community ◽  
Elodea Nuttallii ◽  
Zooplankton Community Structure

Crustacean zooplankton community structure in temporary and permanent grassland ponds

Hydrobiologia ◽  
2009 ◽  
Vol 632 (1) ◽  
pp. 225-233 ◽  
Author(s):  
S. Matthew Drenner ◽  
Stanley I. Dodson ◽  
Ray W. Drenner ◽  
John E. Pinder III
Keyword(s):  
Community Structure ◽  
Zooplankton Community ◽  
Crustacean Zooplankton ◽  
Zooplankton Community Structure ◽  
Permanent Grassland

scholarly journals Studies on picophytoplankton in the southern Gulf of Mexico: recognition of picoprokaryotes and abundances of picophytoplankton during "dry season"

2013 ◽  
Vol 61 (4) ◽  
pp. 265-276 ◽  
Author(s):  
Aldo Aquino-Cruz ◽  
David Uriel Hernández-Becerril ◽  
Martha Signoret-Poillon ◽  
David Alberto Salas-de-León ◽  
María Adela Monreal-Gómez
Keyword(s):  
Gulf Of Mexico ◽  
Chlorophyll A ◽  
River Mouth ◽  
Dry Season ◽  
Shallow Waters ◽  
Southern Gulf Of Mexico ◽  
Lower Maximum ◽  
June July ◽  
Abundance And Distribution ◽  
Three Rivers

The abundance and distribution of total autotrophic picophytoplankton (PFP), temperature, salinity, PAR, and chlorophyll a were determined in two presumably contrasting environments: (1) two coastal areas (close to the mouths of three rivers), and (2) one oceanic area (Campeche Canyon), of the southern Gulf of Mexico, during the "dry season" (June-July, 2004). The picoprokaryotes Prochlorococcus and Synechococcus were identified by TEM, whereas Synechococcus and picoeukaryotes populations were also recognized by flow cytometry. The highest PFP abundance (1.67×105 cells ml-1) was found in shallow waters (~10 m depth) around the Grijalva-Usumacinta river mouth, followed by that found at a station close to the Coatzacoalcos River (1.19×105 cells ml-1); PFP abundances in the Campeche Canyon were usually lower (maximum 1.53×104 cells ml-1). Greater variability in PFP abundances was found in coastal stations than in oceanic waters, and weak relationships appeared between the patterns of chlorophyll a and PFP abundance. Peaks of PFP were detected in both coastal and more oceanic areas, but in the Campeche Canyon they were located deeper (60 m), relatively closer to the deep maximum of chlorophyll (located at about 75 m). Results suggest that PFP populations include a substantial photosynthetic component in both coastal and oceanic waters of the southern Gulf of Mexico.

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