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Characteristics of algal succession Following Rock Scraping at Imwon Area in the East Coast of Korea

Journal of Ocean University of China 2016年第6期15卷 1087-1093页

作者： Young Dae Kim Jung Kwan Alan Myung Mo Nam Chu Lee Hyun Il Yoo Su Yeoung Yeon Young Hwan Kim Jang Kyun Kim Jae Suk Choi East Sea Fisheries Research Institute National Fisheries Research & Development Institute Gangneung 210-860Republic of Korea Korea National Park Service National Park Research Institute Yeosu 550-833 Republic of Korea Seaweed Research Center 1rational Fisheries Research & Development lnstituie Mokpo 530-831 Republic of Korea Department of Biology Chungbuk National University Chongju 361-763 Republic Of Korea Department of Marine Science School of Natural Sciences Incheon National University 22012 Yeonsu-gu Incheon Korea Department of Marine Sciences University of Connecticut 06901 Stamford Connecticut USA Division of Bioindustry Silla University Sasang-gu Busan 617-736 Republic of Korea

Abstract This study was conducted to clarify the characteristics high-pressure water sprayer in the period from June 2010 to April 2011 of algal succession following rock scraping using hoe or We divided the research area off the eastern coast of Korean near Imwon into 3 categories depending upon the severity of the barren ground, i.e., the urchin barren-affected, urchin bar- ren-ongoing and urchin barren-free areas. In April 2011, in the urchin barren-affected area with 25 seaweed species, the cover per- centage and importance value （IV） of erustose coralline algae were higher than those of other species. In the urchin barren-ongoing area with 33 seaweed species, crustose coralline algae （mean IV=62%） as well as Sargassum sp. （mean IV=28%）, and Gelidium amansii （mean IV= 19%） were observed following rock scraping. In the urchin barren-free area where seaweed communities were relatively abundant with 42 species, a variety of algal species including G. amansii （mean IV = 32%） underwent algal succession. Overall, it was observed that, as an aspect of algal succession, the weaker the barren ground severity was, the more frequent and di- verse the seaweeds were, and the more complex the succession pattern was in the study. As an aspect of recovering algal community, rock scraping using hoe was shown to be superior to the method using high-pressure water spraying. Therefore, we conclude that rock scraping using hoe is a very effective strategy for recovering the algal community in urchin barren-ongoing area.

关键词： algal succession sea-urchin barren ground rock scraping subtidal zone

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algal massive growth in relation to water quality and salinity at Damietta,north of Egypt

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Journal of Coastal Life Medicine 2015年第2期 113-121页

作者： Mohamed Ali Ibraheem Deyab Taha Mohamed El-Katony Botany Department Faculty of ScienceDamietta UniversityNew Damietta CityEgypt

Objective:To relate the proliferation and dominance of certain algal species at the Damietta and its relation to water ***:Water and algal biomass were bimonthly sampled from five selected sites at Damietta Province,Egypt during *** were identified and ***,algae and sediment were ***:The physicochemical properties of water showed limited seasonal but substantial local *** high levels of nitrogen and phosphorus and turbidity of water pointed to marked eutrophication,which could enhance massive algal *** temporal fluctuation in temperature,exposure to industrial and domestic sewage and salinity results in succession between blooming algal *** platensis and Chlorella vulgaris alternated in a moderately saline water and Oscillatoria agardhii and Mougeotia scalaris in a fresh water body during summer and winter ***,Microcystis aureginosa and Ulva lactuca alternated in a moderately saline site during autumn and summer *** albida dominated a fish pond of brackish water and Dunaliella salina dominated the most saline water over the whole period of ***:Growth of the predominant algal species is correlated to water *** species are of considerable nutritive value,with moderate contents of protein,carbohydrate,macronutrients and micronutrients,which evaluates them for usage as food(green and macroalgae),fodder or bio-fertilizer(cyanophytes).

关键词： algal growth Water quality Sediment North Damietta Egypt Waste water treatment algal succession

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