Leila Danshvar; Nasrin Sakhaei; Babak Doustshenas; Ahmad Savari; Amir Ashtari
Abstract
The aim of this study was to determine the abundance of biofouling communities and compare their growth in different panels of concrete, PVC and iron in the port of Kushkonar (N W Parsian Gulf).A total of 162 panels were placed in Kushkonar port. The panels were placed by the diving team in 3 stations ...
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The aim of this study was to determine the abundance of biofouling communities and compare their growth in different panels of concrete, PVC and iron in the port of Kushkonar (N W Parsian Gulf).A total of 162 panels were placed in Kushkonar port. The panels were placed by the diving team in 3 stations in March 2016. The first harvest of the panels was done after 6 months in the summer and second harvest was done in winter 2016. A total of 162 panels were placed in Kushkonar port. Different panels (with 3 repetitions) at a depth of 5-7 meters were placed horizontally by the diving team in 3 stations in March 2016. The first harvest of the panels was done after 6 months in the summer and second harvest was done in winter 2016. Overall24 species have settled, Crustaceans (6), Gastropoda (5), Bivalvia (4), Polychaeta (10), Polyplacophora (2), Bryozoan (1) and Macroalgae( 4).The abundance of biofouling communities in the second harvest was much higher than the first harvest. In the second harvest, the highest density of biomass was related to PVC multilayer panels with 10696.67±447.75/m-2,There were also no specimens of Polyplacophora, Polychaeta and Bryozoa in the iron panels. Also, another factor in increasing the frequency of biofouling communities on PVC multilayer panel and concrete panel, was the presence of many pores in these panels, which created a shelter for larvae to settle and thus increase their adult abundance.
Samarghand Gafari; Seyed Mohammad Bagher Nabavi; Babak Doustshenas; Nasrin Sakhaei; Sharif Ranjbar
Abstract
The present study was carried out to investigate the diversity and distribution of the Polychaeta species in the Qeshm Island and the effect of desalination plants on their communities. The desalination plants provide a large portion of Qeshm Island drinking water. So, their waste waters could effect ...
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The present study was carried out to investigate the diversity and distribution of the Polychaeta species in the Qeshm Island and the effect of desalination plants on their communities. The desalination plants provide a large portion of Qeshm Island drinking water. So, their waste waters could effect on environment especially benthic animals near the coastline. Substrate sampling was carried out in summer and winter 2014 from 9 stations. Station 1 was situated near (desalination site) with the highest temperature and salinity in both summer and winter season, which shows the effects of drainage waste water on environment condition. The substrates of the most stations were silt-clay. At the stations 4 and 5, which sediments included more silt and clay, organic matters were higher than other stations. In this study 49 genera and species were identified. There was a significant negative correlation between the polychaetes abundances and sediment content of silt and clay observed. The higher abundances of polychaetes were found in the stations with lower content of organic matters and greater grain size sediments. The genera Cossura sp. and Scoloplos simplex which related to Cossuridae and Orbiniidae families respectively were dominant specimens. The lowest level of diversity was estimated in station 1. Diversity and dominance indices at stations near the wastewater outlet showed significant differ in both seasons (P<0.05). Finally, it seems that desalination plant may affects adversely on species diversity by increasing of temperature and salinity in short distances.
