DYNAMICS OF COENOPOPULATION STATUS OF <i>AHNFELTIA TOBUCHIENSIS </i>(AHNFELTIACEAE) IN THE IZMENA BAY OF KUNASHIR ISLAND (SOUTHERN KURILES ISLANDS)
The purpose of research was to develop a science-based recommendations for the rational use of resources of <i>Ahnfeltia tobuchiensis</i> in the Izmena Bay (Kunashir island) grounded on analysis of population dynamics. This work presents the results of own research carried out in 1989-2009 years. An unsustainable exploitation of coenopopulation resources in 1937-1994 led to reduction of all parameters. So, in 1993, the total biomass of <i>Ahnfeltia</i> was only 80 000 tons that is 51.6 % of stock in 1987. An average biomass decreased by 58 % and an average height of stratum decreased by 27 %. The recovery of <i>Ahnfeltia</i> field was observed in 1995-2009 in the absence of harvest. The total biomass increased to 175 thousand tons, the average specific biomass increased to 6 kg/m <sup>2</sup> and the average height of stratum was 17.1 cm. On the basis of modern studies of algae coenopopulation and harvest experience in the past years recommendations were provided for the rational use of resources <i>Ahnfeltia tobuchiensis</i> in the Izmena Bay in the case of harvest reactivation.