Reserves of macrophytes as an indicator of the state of underwater landscapes (the Black Sea)
Abstract
The criteria for the assessment of the stability of underwater landscapes (bottom natural complexes, BNC) are proposed (using the scorecard approach) on the basis of the analysis of spatial distribution of phytomass reserves of macrophytobentos and principal Black Sea macrophyte species in the coastal zone of Crimea. The suggested criteria were tested for the Laspi Bay, where there is a series of long-term (1983– 2016) observations of bottom vegetation changes with regard to the bottom landscape structure. The phytomass reserves of macrophytes and their dominant species (Cystoseira spp., Phyllophora crispa, Zostera spp.) for the upper and lower boundaries of the contours of various bottom natural complexes were estimated. An abrasion upper shoreface slope built of psephitic (rudaceous) sediments with dominance of Cystoseira species is the most stable BNC in the water area of the bay with the smallest recorded changes of integrated assessment. A gently sloping accumulation plain built of psammitic deposits with broken shell inclusions and dominant Phyllophora crispa and а gently sloping accumulation plain formed by silty–psammitic (arenaceous) sediments with dominant common eelgrass (Zostera marina) were more prone to transformation (minimum integrated assessments), which reflects in the change of the depth of their distribution, degradation of plant component and sharp reduction of the contribution of speciiesedifiers.
Keywords
Supporting agencies: The research was carried out under the state scientific task of the A.O. Kovalevsky Institute of Marine Biological Research of RAS (IMBR) (№ АААА-А18-118021350003-6). Sampling and primary processing of macrophytobenthos in 2016 was carried out as part of the state task from Kovalevskii Institute for Marine Biological Research, project № 1001-2014-0014, in which, in addition to the authors, the employees of the phytoresource laboratory took part
About the Authors
Т. V. Pankeeva
A.O. Kovalevsky Institute of Marine Biological Research of the RAS;
MSU Branch in Sevastopol
Russian Federation
Russian Federation
Scientific Researcher, PhD. in Geography,A.O. Kovalevsky Institute of Marine Biological Research of the RAS, Department of Biotechnologies and Phyto Resources; MSU Branch in Sevastopol
Sevastopol
N. V. Mironova
A.O. Kovalevsky Institute of Marine Biological Research of the RAS
Russian Federation
Russian Federation
Senior Scientific Researcher, PhD. in Biology
Department of Biotechnologies and Phyto Resources
SevastopolReferences
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Review
For citations:
Pankeeva Т.V., Mironova N.V. Reserves of macrophytes as an indicator of the state of underwater landscapes (the Black Sea). Lomonosov Geography Journal. 2019;(6):102-112. (In Russ.)
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