TY - JOUR
T1 - Comparison of two sampling methods when studying periphyton colonization in Lam Tsuen River, Hong Kong, China
AU - Lei, Anping
AU - Lam, Kwan sing Paul
AU - Hu, Zhangli
N1 - Funding Information:
* Supported by the National Natural Science Foundation of China (Nos. 30770393; 30770340), the National Major Program of Science and Technology for Water Pollution Control and Restoration in China (Nos.2009ZX07423-003, 2009ZX07101-011), and the Natural Science Foundation of Guangdong Province, China (No. 06301361) ** Corresponding author: [email protected]
PY - 2011/1
Y1 - 2011/1
N2 - We used standard periphyton samplers to examine the colonization pattern of periphytic algae on artificial substrates (glass slides) in Lam Tsuen River, Hong Kong, in dry (winter) and wet (summer) seasons. In each season, six replicated slides were retrieved randomly and replaced by new slides at weekly intervals over a period of 6 weeks. We thus obtained two batches of slides, both with a series of different exposure times (1 to 6 weeks): one batch was set up at the same time (start of the sampling) and the other was harvested at the same time (end of the sampling). Changes in taxonomic composition, species diversity (Shannon-Wiener diversity index), standing crop (in terms of cell density and cell biovolume), and abundance of the abundant algal species were monitored and compared between the two batches of slides. The succession patterns of the periphytic algae were similar between the two batches in each season, while more remarkable differences were observed between the two seasons, suggesting that either batch would be suitable for a colonization study of periphytic algae. The cell density was dominated by diatoms in both seasons, while the cell biovolume was dominated by diatoms in winter and by green algae in summer. The cell density and biovolume attributed to blue green algae was relatively small. Most of the diatom species exhibited similar colonization patterns throughout the experiment, while green algae showed different succession patterns in different seasons or sampling methods, indicating that diatoms are better bio-indicators than green algae for a periphyton colonization study. In general, the diversity indices and the standing crops reached their maximums at around week 4, and they were higher in summer than in winter.
AB - We used standard periphyton samplers to examine the colonization pattern of periphytic algae on artificial substrates (glass slides) in Lam Tsuen River, Hong Kong, in dry (winter) and wet (summer) seasons. In each season, six replicated slides were retrieved randomly and replaced by new slides at weekly intervals over a period of 6 weeks. We thus obtained two batches of slides, both with a series of different exposure times (1 to 6 weeks): one batch was set up at the same time (start of the sampling) and the other was harvested at the same time (end of the sampling). Changes in taxonomic composition, species diversity (Shannon-Wiener diversity index), standing crop (in terms of cell density and cell biovolume), and abundance of the abundant algal species were monitored and compared between the two batches of slides. The succession patterns of the periphytic algae were similar between the two batches in each season, while more remarkable differences were observed between the two seasons, suggesting that either batch would be suitable for a colonization study of periphytic algae. The cell density was dominated by diatoms in both seasons, while the cell biovolume was dominated by diatoms in winter and by green algae in summer. The cell density and biovolume attributed to blue green algae was relatively small. Most of the diatom species exhibited similar colonization patterns throughout the experiment, while green algae showed different succession patterns in different seasons or sampling methods, indicating that diatoms are better bio-indicators than green algae for a periphyton colonization study. In general, the diversity indices and the standing crops reached their maximums at around week 4, and they were higher in summer than in winter.
KW - cell biovolume
KW - cell density
KW - colonization
KW - periphyton
KW - species diversity
UR - http://www.scopus.com/inward/record.url?scp=79955553230&partnerID=8YFLogxK
U2 - 10.1007/s00343-011-9961-5
DO - 10.1007/s00343-011-9961-5
M3 - Article
AN - SCOPUS:79955553230
SN - 0254-4059
VL - 29
SP - 141
EP - 149
JO - Chinese Journal of Oceanology and Limnology
JF - Chinese Journal of Oceanology and Limnology
IS - 1
ER -