Subtidal Marine Algal Community and Endangered Species in Dokdo and Ulleungdo, Two Oceanic Islands in the East Sea of Ko
- PDF / 3,909,626 Bytes
- 11 Pages / 595 x 842 pts (A4) Page_size
- 23 Downloads / 177 Views
Available online at http://link.springer.com
Article pISSN 1738-5261 eISSN 2005-7172
Subtidal Marine Algal Community and Endangered Species in Dokdo and Ulleungdo, Two Oceanic Islands in the East Sea of Korea Seung Wook Jung1, Yoon Sik Oh2, Hyun Soo Rho3, and Chang Geun Choi1* 1
Department of Ecological Engineering, College of Environmental and Marine Technology, Pukyong National University, Busan 48513, Korea 2 Division of Life Science, Gyeongsang National University, Jinju 52828, Korea 3 East Sea Environment Research Center, East Sea Research Institute, Korea Institute of Ocean Science & Technology, Uljin 36315, Korea Received 18 June 2020; Revised 22 July 2020; Accepted 13 August 2020 © KSO, KIOST and Springer 2020
Abstract - Dokdo and Ulleungdo islands harbor diverse marine algae and are therefore uniquely well-suited for research on marine algae distribution and ecological changes. However, these two islands are largely inaccessible and thus their associated marine ecosystems are much less studied than other regions. Therefore, our study sought to examine the species composition and biomass of subtidal marine algae at 11 locations in both islands in the spring of 2014. A total of 164 species comprising 20 green, 48 brown, and 96 red algae, were identified, and these were classified into three phyl a, 50 families, and 100 genera. Cluster analysis and non-metric multidimensional scaling plots revealed that all surveyed sites except the Landing place and Hokdomgul (Dokdo) were similar in species composition. Community indices were measured based on the biomass of the collected species. The abundance index ranged from 10.57 to 23.19, and the evenness index ranged between 0.21 and 0.48. The diversity index was high (4.70) in Neunggeol, Ulleungdo, and low (3.69) in Hokdomgul, Dokdo. The present study provides baseline data for the conservation of subtidal communities and endangered species, as well as for future monitoring of changes in subtidal vegetation in response to global warming. Keywords − conservation, Dokdo, ecosystem, global warming, marine algae, Ulleungdo
1. Introduction In Korea, the average temperature has risen by 1.5°C from 1904 (when meteorological observations began) to 2000, which exceeds the global warming trend. If greenhouse gases continue to be released at the current rates, Korea’s temperature *Corresponding author. E-mail: [email protected]
will rise by 3.2°C from the present in the second half of the 21st century, thereby acquiring a subtropical climate (Tangley 1988; Kim et al. 2012; MOE 2013). Dokdo is a volcanic island that formed 2,000 m above the seafloor (Sohn and Park 1994), and is located more than 200 km east of Korea (Fig. 1). The island is influenced by the warm Tsushima Currents, the North Korean Cold Current, and the Liman Current (Park et al. 2002; Choi et al. 2009). Dokdo is a bedrock-formed island located in the open sea, where large brown algae such as Ecklonia bicyclis and E. cava are predominant (Kang et al. 2001). First studied by Kang and Park (1969), marine alga
Data Loading...
