Organic Carbon and Particle-Size Distribution in the Littoral Bottom Sediments of the Laspi Bay (the Black Sea)  id статьи: 697
Тип публикации
статья в журнале
Язык
En
Журнал
PHYSICAL OCEANOGRAPHY

ISSN:0928-5105
Год
2020
Выходные данные
том 27
выпуск 3
страницы 266-277
Абстракт
Purpose. The work is aimed at estimating the organic carbon abundance in the bottom sediments of the littoral zone in connection with the state of macrozoobenthos in the Sevastopol region coastal waters with different levels of the anthropogenic pressure (by the example of the Laspi Bay). Methods and Results. The samples were taken in the dynamically active coastal-shelf zone (up to the depths similar to 20 m) of the Laspi Bay in September, 2017. Two samples were taken during the 103rd cruise of R/V "Professor Vodyanitsky" (September, 2018). The geochemical composition of bottom sediments was investigated. The bottom sediments of natural humidity were analyzed in accordance with the requirements of the regulatory documents. In the sediments containing the aleurite fraction in the central part of the Laspi Bay (station 4), the organic carbon content (C-org) increased its natural course up to 0.46 %, but did not exceed its maximum values characteristic of the similar lithological sediments in the shallow-water part of the Crimea Southern Coast (1.14 %). In the deep part of the bay occupied with the aleurite-pelitic silt, the C-org content exceeded 2 %. Absence of the C-org accumulation within the depths under study is conditioned primarily by the grain-size composition of the bottom sediments, the hydrodynamic factor and the morphometric features of this coastal site. Presence of a small portion of the aleurite-pelitic fraction in the bottom sediments also does not promote the organic carbon accumulation. Thus, spatial distribution of the carbon organic and inorganic forms is conditioned by the features of the matters' lateral migration, which, in its turn, is governed by dependence of the bottom sediments' chemical and dispersion structure upon the environmental morphodynamic conditions. Conclusions. The littoral sediments were found to be characterized by a low organic content (C-org = = 0.16 %) not exceeding the geochemical background values of the surface bottom sediments in the Black Sea shelf zones. At present, the organic matter accumulation is determined by the features of the environmental morphodynamic conditions (transition of fine particles to the deep zones) and by the dispersed composition of the bottom sediments.
Ключевые слова
bottom sediment, organic carbon, zoobenthos, the Laspi Bay, the Black Sea
Дата занесения
2020-09-29 13:32:09
Scopus
Статус нет
Квартиль --
WoS
Статус есть
Квартиль Q4
РИНЦ
Статус есть
Импакт-фактор --
количество баллов за публикацию
4
количество баллов каждому автору
2
Финансирование:
0827-2019-0004
Комплексные междисциплинарные исследования океанологических процессов, определяющих функционирование и эволюцию экосистем прибрежных зон Черного и Азовского морей