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2018 Vol.23, Issue 4 Preview Page

Article

Growth Dynamics of the Surfgrass, Phyllospadix iwatensis on the Eastern Coast of Korea

한반도 동해 연안에 자생하는 말잘피, 새우말의 생장 특성

JONG-HYEOB KIM1
,
JAE HOON KIM1
,
GU YEON KIM2
,
JUNG-IM PARK1*
김 종협1
,
김 재훈1
,
김 구연2
,
박 정임1*
1Marine-Eco Technology Institute
2Dept. of Science Education, Kyungnam University
1해양생태기술연구소
2경남대학교 사범대학 과학교육과
* Corresponding Author
30 November 2018. pp. 192-203
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Abstract

말잘피 새우말은 북태평양에 위치한 북동아시아 연안의 암반에 자생한다. 우리나라에서 새우말은 주로 동해 중부해역의 암반조하대에 나타나며, 본 조사에서는 이 곳에 서식하는 새우말의 생태적 특성을 알아보기 위해, 2017년 8월부터 2018년 7월까지 새우말 군락지의 수중광량, 수온의 변화와 함께 매월 새우말의 형태적 특성, 밀도, 생체량과 잎 생산성의 변화를 조사하였다. 수중광량과 수온은 봄과 여름에 증가하고 가을과 겨울에 감소하는 뚜렷한 계절 경향을 보였다. 새우말의 형태, 밀도, 생체량과 잎 생산성은 겨울과 봄에 증가하고, 여름과 가을에 감소하였다. 새우말의 개체당 잎 생산성과 단위면적당 잎 생산성은 수중광량과 유의한 양의 상관관계를 보였다. 새우말의 연간 평균 단위면적당 잎 생산량은 6.3±1.3 g m-2 d-1로, 2018년 5월 최대값(16.4±4.4 g m-2 d-1)과 2월에 최소값(2.4±0.3 g m-2 d-1)을 나타내었다. 새우말 생장의 최적 수온은 12-13℃로 조사되었다.

The surfgrass Phyllospadix iwatensis is native in the exposed rocky shores of the Northwestern Pacific Ocean. In Korea, P. iwatensis is mainly found on the rocky subtidal zone in the central eastern coast. In this study, to examine the ecological characteristics of P. iwatensis, we investigated changes in morphological characteristics, density, biomass, and leaf productivity as well as changes in the underwater irradiance and water temperature of its habitat monthly from August 2017 to July 2018. Underwater irradiance and water temperature showed clear seasonal changes; increases in spring and summer and decreases in fall and winter. Morphological characteristics, shoot density, biomass, and leaf productivities of P. iwatensis exhibited significant seasonal variations, increasing in winter and spring and decreasing in summer and fall months. P. iwatensis leaf productivities both per shoot and per unit area showed significant positive correlations with underwater irradiance. The average leaf productivity of P. iwatensis per area was 6.3±1.3 g m-2 d-1, while minimum and maximum values were 2.4±0.3 g m-2 d-1 in February 2018 and 16.4±4.4 g m-2 d-1in May 2018, respectively. The optimum water temperature for the growth of P. iwatensis in this study was between 12-13℃.

Keywords
Surfgrass
Phyllospadix iwatensis
Growth dynamics
Underwater irradiance
Water temperature

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Information
  • Publisher :The Korean Society of Oceanography
  • Publisher(Ko) :한국해양학회
  • Journal Title :The Sea Journal of the Korean Society of Oceanography
  • Journal Title(Ko) :한국해양학회지 바다
  • Volume : 23
  • No :4
  • Pages :192-203
  • Received Date : 2018-08-14
  • Revised Date : 2018-09-28
  • Accepted Date : 2018-10-05
  • DOI :https://doi.org/10.7850/jkso.2018.23.4.192
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