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Invasion potential of Kappaphycus alvarezii on corals at Kurusadai Island, Gulf of Mannar, India
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  • Invasion potential of Kappaphycus alvarezii on corals at Kurusadai Island, Gulf of Mannar, India
  • Invasion potential of Kappaphycus alvarezii on corals at Kurusadai Island, Gulf of Mannar, India
저자명
Mandal. Subir Kumar,Mantri. Vaibhav A.,Haldar. Soumya,Eswaran. Karuppanan,Ganesan. Meenakshisundaram
간행물명
Algae
권/호정보
2010년|25권 4호|pp.205-216 (12 pages)
발행정보
한국조류학회(藻類)
파일정보
정기간행물|ENG|
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The marine red alga Kappaphycus alvarezii is a major source of $kappa$-carrageenan. It has been introduced in 20 countries including India. Recently, several reports have expressed concerns about Kappaphycus invasion on Acropora corals at Kurusadai Island in the Gulf of Mannar, India, which is part of a marine bioreserve. To understand the extent of the Kappaphycus invasion, 27 randomly selected locations around Kurusadai Island and the mainland coast were surveyed during May-August 2008 and July 2009. Our rigorous sampling revealed that K. alvarezii was confined to two different patches of 105 m $ imes$ 55 m and 8 m $ imes$ 9 m located at the southeastern part of Kurusadai Island. The actual extent of the K. alvarezii canopy coverage was 76.7 $m^2$, accounting for less than 0.0035% of the total coral reef area. The daily growth rate of the K. alvarezii at Kurusadai was 0.7%. K. alvarezii was not observed in the coral reef area of the adjoining Pullivasal and Poomarichan Islands or the Palk Bay area cultivation sites. The lack of functional reproductive cycle, low spore viability, and the absence of microscopic phases in the life cycle of this alga coupled with the abundance presence of herbivores may restrict the further spread of this alga, so its invasive potential at Kurusadai Island is considered remote.