The Effect of Environmental Factors on the Distribution Pattern of Mytilaster Lineatus(Gmelin,1789)Bivalves in the Rocky Shores of the Southern Caspian Sea Basin
Oneof the alien speciesinthe southern coast ofthe Caspian Sea which is growing in the recent decade is Mytilaster lineatus bivalve. The aim ofthisstudy was to determinethe number of the biomasses, cover percentage, and evaluating the environmental factors affecti ng the distribution of this bivalveindifferent regions of the rocky shores of southern Caspian Sea basin.10 stationson the natural and artificial rocky shores were selected (from Astara to Babolsar), and using a Quadrat15 × 15, the samplingwas implemented randomly with3replications, within a year, monthlyfrom March 2013 to February 2014. The average number ofpeoplein the quadrates was determined as 381.9, cover percentage 32.6, andbiomassperquadrat area unit 32 g.Averagewater temperature was measured as 16.48° C, salinity 9.87ppm, pH8.27, dissolved oxygen 9.89 mg/L , thewater-conductivity 16.52 m/s, chlorophyll a 5.7 ± 2.96, andalgalcover percentage 37.76 ± 17.232.The resultsshowed that the number of biomasses,and the cover percentage of bivalves in the stations3, 4and5 had a significant difference in comparison with the otherstations, moreover, the station4had achieved the highest annual crowd of bivalves with an average number of 1373.7, cover percentage of 90.00 %, and133grams ofbiomassper unit area. According to the PCAtest, the most important factors influencing thenumber,cover percentage and biomass of these spices were determined as salinity, water temperature, the amount of chlorophylla, and alga lover, respectively.
| Main Authors: | , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Persian |
| Published: |
2017
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| Subjects: | Invasive species, Environmental factors, Rockyshores, Mytilaster lineatus, Biomass, Distribution, |
| Online Access: | http://hdl.handle.net/1834/13470 |
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