Seasonal distribution of phytoplankton assemblages and nutrient-enriched bioassays as indicators of nutrient limitation of phytoplankton growth in Gwangyang Bay, Korea SCIE SCOPUS

Cited 26 time in WEB OF SCIENCE Cited 29 time in Scopus
Title
Seasonal distribution of phytoplankton assemblages and nutrient-enriched bioassays as indicators of nutrient limitation of phytoplankton growth in Gwangyang Bay, Korea
Author(s)
Baek, Seung Ho; Kim, Dongseon; Son, Moonho; Yun, Suk Min; Kim, Young Ok
KIOST Author(s)
Baek, Seung Ho(백승호)Kim, Dong Seon(김동선)Kim, Young Ok(김영옥)
Publication Year
2015-09-20
Abstract
To assess the effect of nutrient limitation on phytoplankton growth, and its influence on seasonal variation in phytoplanlcton community structure, we investigated abiotic and biotic factors in surface and bottom waters at 20 stations in inner and offshore areas of Gwangyang Bay, Korea. Algal bioassay experiments were also conducted using surface water, to assess the effects of nutrient addition on the phytoplankton assemblages. The fate of major nutrients in the bay was strongly dependent on the discharge of freshwater from the Seomjin River. River flow during the rainy season provides a high nitrogen (N) influx, pushing the system toward stoichiometric phosphorus (P) limitation. However, at some times during the rainy season there was insufficient N to maintain phytoplankton growth because it was rapidly consumed through nutrient uptake by phytoplankton under stratified environmental conditions. Diatoms made a relatively large contribution to total phytoplankton biomass. The dominant diatoms, particularly in winter and summer, were Skeletonema marinoi-dohmii complex and Skeletonema tropicum, respectively, while Eucampia zodiacus and the cryptophyte Cryptomonas spp. dominated in spring and autumn, respectively, comprising more than 75% of the community at most stations. In the bioassay experiments the phytoplankton biomass increased by 30-600% in the +N (added nitrogen) and +NP (added nitrogen and phosphorus) treatments relative to the control and the +P (added phosphorus) treatments, indicating that phytoplankton growth can respond rapidly to pulsed nitrate loading events. Based on the algal bioassay and the field survey, the abrupt input of high nutrient levels following rainfall stimulated the growth of diatom assemblages including the Skeletonema genus. Our results demonstrate that the growth of centric diatoms was enhanced by inputs of N and Si, and that the concentrations of these nutrients may be among the most important factors controlling phytoplankton growth in Gwangyang Bay. (c) 2015 Elsevier Ltd. All rights reserved.
ISSN
0272-7714
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2410
DOI
10.1016/j.ecss.2014.12.035
Bibliographic Citation
ESTUARINE COASTAL AND SHELF SCIENCE, v.163, pp.265 - 278, 2015
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Subject
GENUS SKELETONEMA BACILLARIOPHYCEAE; NEUSE RIVER ESTUARY; SETO INLAND SEA; SAGAMI BAY; EUCAMPIA-ZODIACUS; COASTAL WATERS; COMMUNITY STRUCTURE; NORTH-CAROLINA; ALGAL BLOOMS; HARIMA-NADA
Keywords
phytoplankton community; Gwangyang Bay; nutrient limitation; bioassay; Eucampia zodiacus; Skeletonema genus
Type
Article
Language
English
Document Type
Article
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Related Researcher
Research Interests

Marine ecology,Plankton,Protists,해양생태,부유생물,원생생물

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