SPRING DYNAMICS OF THE PHYTOPLANKTON COMMUNITY OF AN OLIGO-TROPHIC RESERVOIR IN THE SOUTHERN SUBTROPICS OF CHINA

doi:10.17521/cjpe.2007.0036

Abstract

Abstract:

Aims The objective of this paper was to describe the phytoplankton community and dynamics of Meixi Reservoir, a small oligotrophic reservoir in the southern subtopics of China.

Methods Hydrological parameters, nutrition and phytoplankton were investigated at the center of the reservoir every two weeks in spring from January to June 2005. Nutrient concentrations were measured by BG3838-2002. Phytoplankton were identified, counted and measured with microscopes, and their biomass was calculated based on cell morphometrics.

Important findings The phytoplankton community was characterized by low species number, biomass and dominance by two dinoflagellate species, Ceratium hirundinella and Peridinium sp. In total, 42 taxa were identified from 24 samples. The community was distinctively different between early spring (January to March) and late spring (April to June). Only about 12 species were observed in each sampling in the early spring, but 21 species in the late spring. The total abundance of phytoplankton ranged from 31 to 273 cells·ml^-1, and the total biomass of phytoplankton ranged from 0.176 to 2.024 mg·L^-1. The average biomass of phytoplankton was higher in late spring than in early spring. Dinoflagellates had an advantage in competition with other species and were able to move vertically to get nutrients from near the bottom of the reservoir. In late spring,phytoplankton abundance and biomass increased significantly with water temperature, but decreased with rainfall, apparently as water transparence declined due to disturbance from precipitation. Therefore, water temperature was the main factor restricting the phytoplankton community, but was disturbed by rainfall. This study provided base data for phytoplankton communities in oligotrophic water bodies and was helpful to understand possible changes with cultural eutrophication.

Key words: phytoplankton, dynamics, spring, reservoir

LI Qiu-Hua, HU Ren, HAN Bo-Ping. SPRING DYNAMICS OF THE PHYTOPLANKTON COMMUNITY OF AN OLIGO-TROPHIC RESERVOIR IN THE SOUTHERN SUBTROPICS OF CHINA[J]. Chin J Plant Ecol, 2007, 31(2): 313-319.

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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2007.0036

https://www.plant-ecology.com/EN/Y2007/V31/I2/313

Figures/Tables 7

References 22

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	1~3月 January to March	4~6月 April to June	1~6月 January to June
NO₂-N (mg·L^-1)	0.003	0.001	0.002
NO₃-N (mg·L^-1)	0.291	0.261	0.280
NH₄-N (mg·L^-1)	0.026	0.026	0.026
TN (mg·L^-1)	0.610	0.520	0.564
PO₄-P (mg·L^-1)	0.004	0.007	0.006
TP(mg·L^-1)	0.020	0.019	0.020

	1~3月 January to March	4~6月 April to June	1~6月 January to June
NO₂-N (mg·L^-1)	0.003	0.001	0.002
NO₃-N (mg·L^-1)	0.291	0.261	0.280
NH₄-N (mg·L^-1)	0.026	0.026	0.026
TN (mg·L^-1)	0.610	0.520	0.564
PO₄-P (mg·L^-1)	0.004	0.007	0.006
TP(mg·L^-1)	0.020	0.019	0.020

物种 Taxon	a	b	c	d	e	f	g	h	i	j	k	l
绿藻门Chlorophyta
双对栅藻Scenedesmus bijugatus			+				+
单角盘星藻Pediastrum simplex	+						+	+	+
单角盘星藻具孔变种Pediastrum simplex var. duodenarium		+						+
凹顶鼓藻Euastrum spp.		+		+			+
钝角角星鼓藻Staurastrum retusum		+		+					+		+	+
厚变浮游角星鼓藻Staurastrum natator				+			+					+
微小四角藻Tetra?dron minimum	+		+	+		+	+
小球藻Chlorella vulgaris	+	+	+		+	+	+		+	+	+	+
韦斯藻Westella botryoides	+					+	+				+	+
蹄形藻Kirchneriella lunaris	+		++									+
水绵Spirogyra sp.		+
布朗葡萄藻Botryococcus braunii	+	+	+	+			+		+	+	+	+
二角盘星藻Pediastrum duplex				+				+
微芒藻Micractinium pusillum						+		+
放射多芒藻Golenkinia radiata						+	+
二形栅藻Scenedesmus dimorphus							+		+		+
空星藻Coelastrum spaericum							+		+		+
长绿梭藻Chlorogonium elongatum									+	+	+	+
异刺四星藻Tetrastrum heterocanthum										+
顶接鼓藻Spondylosium moniliforme												+
月芽藻Selenastrum bibraianum												+
硅藻门Bacillariophyta
梅尼小环藻Cyclotella meneghiniana	+	+	+	+	+	+	+	+	+	+	+	+
肘状针杆藻Synedra ulna	+	+	+	+	+	+	+	+	+	+	+	+
曲壳藻Achnanthes sp.	+	+	+	+	+			+	+	+	+	+
颗粒直链藻Melosira granulata		+	+			+	+	+
异极藻Gamphonema sp.						+
舟形藻Navicula spp.			+	+		+	+	+	+	+	+	+
羽纹藻Pinnularia spp.								+	+	+
桥弯藻Cymbella laevis								+
窗格平板藻Tabellaria fenestriata								+	+	+	+	+
模糊直链藻Melosira ambigua									+
根管藻Rhizosolenia sp.									+	+	+	+
甲藻门Pyrrophyta
飞燕角甲藻Ceratium hirundinella	+++	+++	+++	+++	+++	+++	+++	+++	+++	+++	+++	+++
多甲藻Peridinium sp.	++	+	+	++	+++	+++	+++	+++	+++	+++	+++	+++
金藻Chrysophyta
分歧锥囊藻Dinobryon divergens	+	++	+			+	+	+	+	+	+	+
具尾鱼鳞藻Mallomonas caudata	+	+	+	+	+	+			+			+
裸藻门Euglenophyta
棘刺囊裸藻Trachelomonas hispida	+	+	+	+	+	+	+	+	+	+	+	+
隐藻门Cryptophyta
隐藻Crytomonas sp.						+	+	+
蓝藻门Cyanophyta
具缘微囊藻Microcystis marginata							+	+
小形色球藻Chroococcus minutus							+	+		+		+
假鱼腥藻Pseudanabaena sp.								+	+	+	+	+
拟拄孢藻Cylindrospermopsis sp.								+	+	+

物种 Taxon	a	b	c	d	e	f	g	h	i	j	k	l
绿藻门Chlorophyta
双对栅藻Scenedesmus bijugatus			+				+
单角盘星藻Pediastrum simplex	+						+	+	+
单角盘星藻具孔变种Pediastrum simplex var. duodenarium		+						+
凹顶鼓藻Euastrum spp.		+		+			+
钝角角星鼓藻Staurastrum retusum		+		+					+		+	+
厚变浮游角星鼓藻Staurastrum natator				+			+					+
微小四角藻Tetra?dron minimum	+		+	+		+	+
小球藻Chlorella vulgaris	+	+	+		+	+	+		+	+	+	+
韦斯藻Westella botryoides	+					+	+				+	+
蹄形藻Kirchneriella lunaris	+		++									+
水绵Spirogyra sp.		+
布朗葡萄藻Botryococcus braunii	+	+	+	+			+		+	+	+	+
二角盘星藻Pediastrum duplex				+				+
微芒藻Micractinium pusillum						+		+
放射多芒藻Golenkinia radiata						+	+
二形栅藻Scenedesmus dimorphus							+		+		+
空星藻Coelastrum spaericum							+		+		+
长绿梭藻Chlorogonium elongatum									+	+	+	+
异刺四星藻Tetrastrum heterocanthum										+
顶接鼓藻Spondylosium moniliforme												+
月芽藻Selenastrum bibraianum												+
硅藻门Bacillariophyta
梅尼小环藻Cyclotella meneghiniana	+	+	+	+	+	+	+	+	+	+	+	+
肘状针杆藻Synedra ulna	+	+	+	+	+	+	+	+	+	+	+	+
曲壳藻Achnanthes sp.	+	+	+	+	+			+	+	+	+	+
颗粒直链藻Melosira granulata		+	+			+	+	+
异极藻Gamphonema sp.						+
舟形藻Navicula spp.			+	+		+	+	+	+	+	+	+
羽纹藻Pinnularia spp.								+	+	+
桥弯藻Cymbella laevis								+
窗格平板藻Tabellaria fenestriata								+	+	+	+	+
模糊直链藻Melosira ambigua									+
根管藻Rhizosolenia sp.									+	+	+	+
甲藻门Pyrrophyta
飞燕角甲藻Ceratium hirundinella	+++	+++	+++	+++	+++	+++	+++	+++	+++	+++	+++	+++
多甲藻Peridinium sp.	++	+	+	++	+++	+++	+++	+++	+++	+++	+++	+++
金藻Chrysophyta
分歧锥囊藻Dinobryon divergens	+	++	+			+	+	+	+	+	+	+
具尾鱼鳞藻Mallomonas caudata	+	+	+	+	+	+			+			+
裸藻门Euglenophyta
棘刺囊裸藻Trachelomonas hispida	+	+	+	+	+	+	+	+	+	+	+	+
隐藻门Cryptophyta
隐藻Crytomonas sp.						+	+	+
蓝藻门Cyanophyta
具缘微囊藻Microcystis marginata							+	+
小形色球藻Chroococcus minutus							+	+		+		+
假鱼腥藻Pseudanabaena sp.								+	+	+	+	+
拟拄孢藻Cylindrospermopsis sp.								+	+	+