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Publication year : 0
Thematic : Marine Protected Areas
Language : English
Note
The composition of summer phytoplankton
communities in two highly eutrophic areas of
Lake Taihu, a large, shallow water body in China
(area 2,338 km2; mean depth 2.0 m), was studied in
relation to selected environmental variables. Both
areas have multiple uses, including drinking water
supply, fisheries, and recreation. The first area,
Meiliang Bay, is much closer to central lake and
subjected to wind-driven sediment resuspension,
while the second, at Wuli Lake, is less affected by
wave action but is considered more nutrient-rich due
to its proximity to human inhabitation. By comparing
two lake areas, we attempt to advance the understanding
and management of different regions of
shallow lakes, mainly differing in resuspension levels
and eutrophication levels. A comparison of these two
lake areas indicated a higher standing crop of
phytoplankton in Wuli Lake than in Meiliang Bay.
Canonic Correspondence Analysis indicated that
nutrient status and sediment resuspension were the
principal factors influencing phytoplankton composition
in both areas. The dominant algal group in
Meiliang Bay comprised immobile R-type strategists
(Reynolds in Growth and reproductive strategies of
freshwater phytoplankton, 1988), including filamentous
diatoms and green algae (Aulacoseira granulate
and Planctonema lauterbornii), and recruitmentbeneficial
RS-type strategists, mainly the colonial
cyanobacteria (Microcystis spp.). The community of
Wuli Lake was dominated by S-strategists, principally
motile flagellates (Cryptomonas spp.) and Cstrategists
including small nonmotile centric diatoms
and chlorococcal green algae.
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Keywords : Hydrosomys chrysogaster
Encoded by : Pauline Carmel Joy Eje
