EFFECT OF COROPHIUM VOLUTATOR ON THE ABUNDANCE OF BENTHIC DIATOMS, BACTERIA AND SEDIMENT STABILITY IN 2 ESTUARIES IN SOUTHEASTERN ENGLAND
EFFECT OF COROPHIUM VOLUTATOR ON THE ABUNDANCE OF BENTHIC DIATOMS, BACTERIA AND SEDIMENT STABILITY IN 2 ESTUARIES IN SOUTHEASTERN ENGLAND
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DOI：
10.3354/meps114109
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发表时间：
1994-11-01
影响因子：
2.5
通讯作者：
HUGHES, RG
中科院分区：
文献类型：
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作者：
GERDOL, V;HUGHES, RG
在现场实验中，在英格兰东南部克劳奇河和黑水河的潮间带泥滩地区，通过喷洒杀虫剂减少了Corophium volutator （Pallas）的丰度。在这些喷洒区域，细菌和硅藻的密度显著增加，叶绿素a的浓度也显著增加。这些变化归因于C. volutator的放牧压力降低，C. volutator是一种消耗硅藻和细菌的沉积物食用者。喷施区沉积物抗剪强度增加，可能有两个原因：一是微生物群分泌的粘多糖量增加，二是沉积物含水量降低。因此，C. volutator的活动可能会加剧英格兰东南部河口普遍存在的侵蚀。
In in situ experiments the abundance of Corophium volutator (Pallas) in areas of intertidal mudflats of the Rivers Crouch and Blackwater, southeastern England, was reduced by spraying with an insecticide. In these sprayed areas the densities of bacteria and diatoms increased significantly, as did the concentrations of chlorophyll a. These changes were attributed to the reduction in the grazing pressure by C. volutator, which is a deposit feeder that consumes diatoms and bacteria. The shear strength of the sediment in the sprayed areas increased, probably for 2 reasons: firstly because of increased amounts of mucopolysaccharide secreted by the microflora, and secondly because of the decreased water content of the sediment. The activities of C. volutator may, therefore, exacerbate the erosion that is prevalent in estuaries in southeastern England.