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The impact of yellow shore crabs,Hemigrapsus oregonensis, on Early Benthic Phase dungeness crabs,Cancer magister, in intertidal oyster shell mitigation habitat

Phytoplankton community composition and size distribution in the Langat River estuary, Malaysia

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Estuaries : Volume 27, Issue 3, June 2004

Estuaries : Volume 27, Issue 2, April 2004

Estuaries : Volume 27, Issue 1, February 2004

Estuaries : Volume 26

Estuaries : Volume 25

Estuaries : Volume 24

Estuaries : Volume 23

Estuaries : Volume 22

Estuaries : Volume 21

Estuaries : Volume 20

Phytoplankton community composition and size distribution in the Langat River estuary, Malaysia

Content Provider	Springer Nature Link
Author	Lassen, Majbritt Fischer Bramm, Mette Elisabeth Richardson, Katherine Yusoff, Fatimah Shariff, Muhamed
Copyright Year	2004
Abstract	Phytoplankton patchiness, as expressed by community composition and size distribution, during the rainy season in the Langat River estuary (Malaysia) is described. Four sites in the estuary were sampled on two different occasions. The sampling area covered a stretch of the river from upstream to downstream of aquaculture activities (shrimp farms). Water samples from a shrimp farm outlet were also analyzed for nutrient and phytoplankton content. Differences in community structure between stations were found by means of multivariate procedures. Genera composition and total biomass were related to environmental factors, revealing salinity, light, and nutrients as important explaining factors. Elevated phytoplankton biomass and total phosphorus concentration, as well as lower inorganic nitrogen: phosphorus ratios, were found downstream of the shrimp farming activities. The size distribution spectrum of the phytoplankton population downstream of the shrimp farms was significantly different from that at the other stations but not different than that found in the sampled effluent from the shrimp farms, where phytoplankton biomass was also high. Twenty-two of the 24 recorded genera from the shrimp farm outlet were also found downstream of the farming activities. A number of different environmental factors potentially alter conditions for phytoplankton in the lower reaches of the estuary as compared to the upper regions. A cause and effect relationship explaining the differences noted between the upper and lower reaches of the estuary cannot be established. This study suggests that nutrient enrichment from the shrimp farming activities is of a magnitude that may contribute to the phytoplankton community changes observed in the lower reaches of the estuary.
Starting Page	716
Ending Page	727
Page Count	12
File Format	PDF
ISSN	01608347
Journal	Estuaries
Volume Number	27
Issue Number	4
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-01-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Environment Ecology Geosciences Freshwater & Marine Ecology Environmental Management Nature Conservation
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Aquatic Science Environmental Science

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