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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Autónoma de Baja California
2014
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| Online-Zugang: | https://www.redalyc.org/articulo.oa?id=48032071004 |
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Inhaltsangabe:
- Influence of environmental changes on picophytoplankton and bacteria in Daya Bay, South China Sea Mei-Lin Wu Yu-Tu Wang You-Shao Wang Fu-Lin Sun Ciencias de la Tierra bacteria Daya Bay fl ow cytometry picophytoplankton Environmental changes driven by intense human disturbance and natural pr ocesses govern the abu ndance and distribution characteristics of two picophytoplankton groups ( Synechococcus and picoeukaryotes). Picophytoplancton and high DNA (HDNA) and low DNA (LDNA) bacterial groups, identified by flow cytometry, were assessed during the au tumn monsoon transition period in Daya Ba y (South China Sea). The abundance of Synechococcus and picoeukaryotes ranged from 2.16 × 10 4 to 1.45 × 10 5 cell mL –1 and from 0.78 × 10 3 to 7.95 × 10 3 cell mL –1 , respectively. The abundance of HDNA bact eria in surface water (mean: 5.58 × 10 5 cell mL –1 ) was greater than in bottom water (mean: 3.74 × 10 5 cell mL –1 ), with significant difference ( n = 12, P = 0.05). The difference in LDNA abundances betwee n surface (mean: 7.06 × 10 5 cell mL –1 ) and bottom (mean: 4.83 × 10 5 cell mL –1 ) waters was insignificant ( n = 12, P > 0.05). The results of the principal component analysis showed that both picophytoplankton ( Synechococcus and picoeukaryotes) and ba cteria (HDNA and LDNA) were positively related to nutrients (NO 3 -N, NH 4 -N, and SiO 3 -Si). Three subsystems in the ba y were identified as follows: the west and east parts, the central and northwest parts, a nd the mouth and central part. 2014 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48032071004 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.3 Vol.40