EUTROPHIC WATERS OF SOUTHWESTERN AUSTRALIA

被引：38

作者：

MCCOMB, AJ

DAVIS, JA

机构：

[1] School of Biological and Environmental Sciences, Murdoch University, Murdoch, 6150, Western Australia

来源：

FERTILIZER RESEARCH | 1993年 / 36卷 / 02期

关键词：

EUTROPHICATION; PHOSPHORUS; ALGAE; CYANOBACTERIA; SEAGRASSES; PLANKTON; BENTHIC FAUNA;

D O I：

10.1007/BF00747580

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Water bodies in coastal areas of southwestern Australia are predisposed to eutrophication. The sandy soils of the catchments retain nutrients poorly, streamflow is highly seasonal, most freshwater wetlands are small and shallow, and the estuaries are poorly flushed. Nearshore waters lack the conventional upwelling of other coastal regions in these latitudes. Consequences include increased macroalgal growth and phytoplankton blooms, especially of cyanobacteria, and loss of seagrasses. Changes to fish and invertebrate populations result both from increased algal production and low oxygen concentrations. Algal toxins and outbreaks of botulism have caused waterbird casualties. Phosphorus is especially important in controlling plant biomass in freshwater wetlands and estuaries, and N in some wetlands and coastal embayments. In the examples reviewed here nutrients are derived mainly from fertilizer applications in catchments and rural industries, and from sewage and individual discharges to coastal waters.

引用

页码：105 / 114

页数：10

共 51 条

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