scholarly journals Shell-zone of a Brackish Water Lake, Mokoto-numa in Hokkaido

1940 ◽  
Vol 9 (4) ◽  
pp. 185-193
Author(s):  
Éizo ASAHINA
Keyword(s):  
Brackish Water ◽  
Water Lake ◽  
Brackish Water Lake

A Holocene dinocyst record of a two-step transformation of the Neoeuxinian brackish water lake into the Black Sea

2009 ◽  
Vol 197 (1-2) ◽  
pp. 72-86 ◽  
Author(s):  
Fabienne Marret ◽  
Peta Mudie ◽  
Ali Aksu ◽  
Richard N. Hiscott
Keyword(s):  
Black Sea ◽  
Brackish Water ◽  
The Black Sea ◽  
Water Lake ◽  
Brackish Water Lake

Ctenophora sinensis: a new diatom species (Bacillariophyta) from China with comments on its structure, nomenclature and relationships

Phytotaxa ◽  
2020 ◽  
Vol 460 (2) ◽  
pp. 115-128
Author(s):  
BING LIU ◽  
DAVID M. WILLIAMS ◽  
ZHU-XIANG LIU ◽  
JIN-HUA CHEN
Keyword(s):  
Brackish Water ◽  
Central Area ◽  
Diatom Species ◽  
Lake Qinghai ◽  
Vegetative Cells ◽  
Qinghai Province ◽  
Water Lake ◽  
Brackish Water Lake

Lake Qinghai is an ancient brackish water lake in the Qinghai province of China. A number of endemic diatom species have already been discovered and described from the lake. This study describes another new endemic diatom species: Ctenophora sinensis sp. nov. Ctenophora sinensis has the following features: (1) frustule and valve are lanceolate; (2) the central area is slightly buttressed internally; (3) its areolae have both outside sieve-like closing plates and inside hymenate occlusions; (4) an apical hyaline field exists near each rimoportula; (5) a pseudoseptum is always presents at each pole; and (6) the cingulum has a 4:2 configuration of girdle bands in normal vegetative cells. Some remarks are provided on the nomenclature of Ctenophora and a few comments on the relationships of the genus.

Geochemistry of surface sediments of a tropical brackish water lake in South Asia

2016 ◽  
Vol 75 (3) ◽  
Author(s):  
Nirmala K ◽  
R. Ramesh ◽  
N. K. Ambujam ◽  
K. Arumugam ◽  
S. Srinivasalu
Keyword(s):  
South Asia ◽  
Brackish Water ◽  
Surface Sediments ◽  
Water Lake ◽  
Brackish Water Lake

Observations with a different approach to morphological colour variation in an isopod population (Crustacea: Isopoda)

Biologia ◽  
2009 ◽  
Vol 64 (1) ◽  
Author(s):  
Belgin Camur-Elipek
Keyword(s):  
Surface Area ◽  
Brackish Water ◽  
Similarity Index ◽  
Bottom Surface ◽  
Colour Variation ◽  
Idotea Baltica ◽  
Water Lake ◽  
Colour Morphs ◽  
First Time ◽  
Brackish Water Lake

AbstractMorphological colour variation in Idotea baltica basteri Audouin, 1827 (Isopoda: Crustacea) is reported for the first time on populations from a brackish water lake (Kucukcekmece Lagoon) in Turkey. According to pigmentation characteristics, the isopods were described and sorted to ten different colour morphs which are named as maculata, maculata-lineata, uniformis, uniformis-lineata, immaculatum, immaculatum-lineata, nigrum, nigrum-lineata, albafusca, and albafusca-fasciatum. The similarity of the morphs was compared by defining digit codes to some of the visual pigmentation characteristics and calculating the Bray-Curtis similarity index of the colour morphs. The albafusca and albafusca-fasciatum forms were found to be the most similar to each other (similarity 96%), whereas immaculatum forms were considered the most different from maculata-lineata (similarity 50%). The morphs named maculata and maculata-lineata, having the highest abundance with 70%, belong to the most successful forms which may achieve crypsis by background matching in their living habitat in Kucukcekmece Lagoon which has sandy and rocky bottom surface area.

scholarly journals Insight into temporal–spatial variations of DOM fractions and tracing potential factors in a brackish-water lake using second derivative synchronous fluorescence spectroscopy and canonical correlation analysis

2021 ◽  
Vol 33 (1) ◽  
Author(s):  
Kuotian Lu ◽  
Weining Xu ◽  
Huibin Yu ◽  
Hongjie Gao ◽  
Xiaobo Gao ◽  
...  
Keyword(s):  
Fluorescence Spectroscopy ◽  
Brackish Water ◽  
Canonical Correlation ◽  
Synchronous Fluorescence ◽  
Second Derivative ◽  
Synchronous Fluorescence Spectroscopy ◽  
Water Lake ◽  
Potential Factors ◽  
Brackish Water Lake ◽  
Insight Into

Abstract Background Insight into temporal–spatial variations of dissolved organic matter (DOM) fractions were undertaken to trace potential factors toward a further understanding aquatic environment in Lake Shahu, a brackish-water lake in northwest China, using synchronous fluorescence spectroscopy (SFS) combined with principal component analysis (PCA), second derivative and canonical correlation analysis (CCA). Result Five fluorescence peaks were extracted from SFS by PCA, including tyrosine-like fluorescence (TYLF), tryptophan-like fluorescence (TRLF), microbial humic-like fluorescence (MHLF), fulvic-like fluorescence (FLF), and humic-like fluorescence (HLF), whose relative contents were obtained by second derivative synchronous fluorescence spectroscopy. The increasing order of total fluorescence components contents was July (11,789.38 ± 12,752.61) < April (12,667.58 ± 15,246.91) < November (19,748.87 ± 17,192.13), which was attributed to tremendous enhancement in TYLF content from April (1615.56 ± 258.56) to November (5631.96 ± 634.82). The PLF (the sum of TYLF and TRLF) dominated the fluorescence components, whose proportion was 40.55, 37.09, or 46.91% in April, July, or November. DOM fractions in November were distinguished from April and July, which could be attributed to that water of the Yellow River was continuously loaded into the lake as water replenishment from April to September. From the replenishment period to non-replenishment, the contents of the five components gradually changed from low in the middle and high around the lake to high throughout entire lake. Based on the CCA results, the potential factors included TYLF, TRLF, MHLF, SD, and BOD5 in April, which were relative to organic matter pollution. The potential factors contained TYLF, TRLF, FLF, Chl-a, TP, CODCr, and DO in July, indicating the enrichment of TP lead algae and plants growth. The potential factors in November consisted of TYLF, TRLF, CODCr, SD, TN, and FLF, representing residue of the algae and plants have been deeply degraded. Conclusion The replenishment of water led to enrichment of TP, resulting in growth of algae and plants, and was the key factor of water quality fluctuations. This work provided a workflow from perspective of DOM to reveal causes of water quality fluctuations in a brackish-water lake and may be applied to other types of waterbodies.

Sign in / Sign up

Export Citation Format

Share Document