Phytomass and photosynthetically active radiation distribution in the Zostera noltii Hornemann canopy in shallow water (the Black Sea)

2019 ◽  
Author(s):  
Alexandr V. Prazukin ◽  
Alexandr A. Latushkin ◽  
Yury K. Firsov ◽  
Anna A. Chepyzhenko
Keyword(s):  
Shallow Water ◽  
Black Sea ◽  
Photosynthetically Active Radiation ◽  
The Black Sea ◽  
Zostera Noltii ◽  
Active Radiation ◽  
Radiation Distribution

Temperature stratification and photosynthetically active radiation distribution in the Zostera noltii Hornemann canopy under shallow water conditions at different solar elevation angles (the Black sea)

2020 ◽  
pp. 160-178
Author(s):  
Александр Васильевич Празукин ◽  
Юрий Константинович Фирсов ◽  
Александр Александрович Латушкин ◽  
Анна Алексеевна Чепыженко
Keyword(s):  
Black Sea ◽  
Photosynthetically Active Radiation ◽  
Light Availability ◽  
Temperature Stratification ◽  
The Black Sea ◽  
Shallow Waters ◽  
Zostera Noltii ◽  
Active Radiation ◽  
Solar Elevation ◽  
Radiation Distribution

Морские травы экологически важны, но чрезвычайно уязвимы перед антропогенными изменениями в прибрежных зонах, которые влияют на доступность света в этих экосистемах. При разной высоте Солнца над горизонтом в зондирующем режиме проводилось одновременное измерение значений температуры воды и интенсивности фотосинтетически активной радиации (IPAR) по профилю полога Zostera noltii Hornemann (высота полога 32 см.) в мелководной части Казачьей бухты (г. Севастополь, Черное море, 44°57′26″ с.ш., 33°40′33″ в.д.). Для полога Z. noltii характерен одномодальный тип вертикального распределения биомассы с максимумом (65,7 г (сухой массы) / м2) в его нижней части. Рассматривается изменение температурной стратификации и распределения IPAR по профилю растительного полога Z. noltii в течение светового дня. Seagrass is environmentally significant but extremely vulnerable in coastal areas to anthropogenic changes, which affect light availability. Simultaneous measurements of water temperature and photosynthetically active radiation (PAR) intensity in the sounding mode were taken at different solar elevation angles for the Zostera noltii Hornemann canopy (canopy height 32 cm) in shallow waters of the Cossack Bay (Sevastopol, the Black Sea, 44°57′26″ с.ш., 33°40′33″ в.д.). Z. noltii canopy is characterized by a unimodal type of biomass vertical distribution with its maximum (65,7 g (dry matter)/m2) in the lower part. Temperature stratification and IPAR distribution changes within the Z. noltii vegetation canopy profile during daylight hours are considered.

Taxonomic contribution to the genus Sphaerosyllis (Annelida: Syllidae: Exogoninae) in the Black Sea

Zootaxa ◽  
2017 ◽  
Vol 4329 (3) ◽  
pp. 281
Author(s):  
VICTOR SURUGIU ◽  
GUILLERMO SAN MARTÍN
Keyword(s):  
New Species ◽  
Shallow Water ◽  
Black Sea ◽  
New Record ◽  
The Black Sea ◽  
Fibrillar Material ◽  
Unknown Species ◽  
Black Sea Coast ◽  
Sea Coast

During a study of fauna associated with a shallow-water Zostera (Zosterella) noltei bed from the southern part of the Romanian Black Sea coast, among the identified material collected in 2015, a syllid polychaete belonging to the subfamily Exogoninae, Sphaerosyllis taylori Perkins, 1981, represents a new record for the Black Sea. Re-examination of available specimens previously identified as Sphaerosyllis bulbosa Southern, 1914 revealed that they belong to an unknown species, described herein as Sphaerosyllis pontica sp. nov. The new species is characterized by the median antenna inserted more posteriorly than the lateral antennae, dorsal cirri with bulbous bases and very short tips, shorter than the parapodial lobes, dorsal cirri absent on chaetiger 2, parapodial glands with fibrillar material from chaetiger 4 onwards, compound chaetae with short blades and smooth shafts, anterior parapodia with two aciculae each, one straight and one with bent tip. Descriptions of both species are provided together with a key to all Sphaerosyllis species known from the Black Sea.  

Some Observations on the Biology and the Ecology of a Venus Striatula Population in the Bay of Douarnenez, Brittany

1985 ◽  
Vol 65 (4) ◽  
pp. 889-900 ◽  
Author(s):  
J. Guillou ◽  
P. G. Sauriau
Keyword(s):  
Shallow Water ◽  
Black Sea ◽  
Environmental Conditions ◽  
Ecological Factors ◽  
Fine Sand ◽  
The Black Sea ◽  
High Exposure ◽  
Lofoten Islands ◽  
Muddy Sediments ◽  
Latitudinal Range

INTRODUCTIONVenus striatula (da Costa) (= Venus gallina L.) occurs in high densities in shallow water on a bottom of clean fine sand in the Bay of Douarnenez. The environmental conditions are characterized by an obvious sediment instability due to a high exposure to westerly swells (Guillou & Le Moal, 1978). This species is preferentially distributed in the fine sands (Petersen, 1913; Thorson, 1957), but is relatively tolerant towards certain ecological factors and so is sometimes found in very muddy sediments. It also shows an extended latitudinal range, since it is recorded from the Lofoten Islands to the Canaries, in the Mediterranean and the Black Sea (Tebble, 1966).

scholarly journals First survey of shallow-water Amphipoda along the Georgian Black Sea coast reveals new faunistic records and the unexpected Atlantic invader Melita nitida

2020 ◽  
Author(s):  
DENIS COPILAȘ-CIOCIANU ◽  
GAVRIL MARIUS BERCHI ◽  
LEVAN MUMLADZE
Keyword(s):  
Shallow Water ◽  
New Taxa ◽  
Black Sea ◽  
First Record ◽  
The Other ◽  
The Black Sea ◽  
Number Of Species ◽  
Black Sea Coast ◽  
Cryptic Invasions ◽  
Sea Coast

We present findings from the first survey of shallow-water amphipods conducted along the Black Sea coast in Georgia. Eight species from five families have been identified, all but one being new for the Georgian fauna. Although most are usual inhabitants of the Black and Mediterranean seas, we report the first record of the invader Melita nitida in this region. This North American species was previously known in Europe only from the Atlantic and Baltic coasts. Its finding in the Black Sea implies either jump dispersal, or a more widespread, but cryptic distribution. Given that the total number of species reported in Georgia is lower than in the other countries neighbouring the Black Sea, we anticipate the discovery of new taxa in future surveys. Our study highlights the importance of faunistic exploration in previously overlooked regions for detecting potentially cryptic invasions and corroborating biogeographical patterns.

scholarly journals Operational numerical wind-wave model for the Black Sea

2000 ◽  
Vol 1 (1) ◽  
pp. 65
Author(s):  
A. KORTCHEVA ◽  
G. KORTCHEV ◽  
J. M. LEFEVRE
Keyword(s):  
Shallow Water ◽  
Real Time ◽  
Wave Height ◽  
Black Sea ◽  
Water Wave ◽  
Wind Wave ◽  
Wave Model ◽  
The Black Sea ◽  
Sea State ◽  
Height Data

In this paper the discrete spectral shallow water wave model named VAGBUHL1 is presented. This model is used for real-time Black Sea state forecasting. The model was verified against satellite ERS-2 altimeter wave height data.

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