EFFECTS OF PERIODIC FLOODING ON THE WATER CHEMISTRY AND PRIMARY PRODUCTION OF THE MAPIRE SYSTEMS (VENEZUELA)

被引：21

作者：

VEGASVILARRUBIA, T ^{[1
]}

HERRERA, R ^{[1
]}

机构：

[1] INST VENEZOLANO INVEST CIENT,CTR ECOL & CIENCIAS AMBIENTALES,CARACAS 1020 A,VENEZUELA

来源：

HYDROBIOLOGIA | 1993年 / 262卷 / 01期

关键词：

ECOTONE; TROPICAL FLOODPLAIN LAKES; LENTIC LOTIC ALTERNATION; WATER CHEMISTRY; PRIMARY PRODUCTION; NUTRIENT PULSES;

D O I：

10.1007/BF00010987

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

The Mapire river mouth forms a complex floodplain system, where the river behaves as a river during the dry season, but changes to a transient lake which partially covers the inundation forest during the rainy season. Thus, we expected changes in water chemistry and a gradual increase of primary production during high waters. The system was sampled monthly for one year; two floodplain lakes were also studied for comparative purposes. Variations in the concentration of macro- and micronutrients occurred in a pulse-like manner and seemed to relate to mechanisms at work in the transient lake. Dissolved oxygen showed a stratification with low values at the bottom, but never reached anoxia. Net and gross primary production and respiration did not show any clear spatial pattern, reflecting a mosaic of different biochemical states within the transient lake. Heterotrophy tended to prevail in the transient lake, while autotrophy dominated floodplain lakes.

引用

页码：31 / 42

页数：12

共 49 条

[1]

BLANCO L, 1986, MEM SOC CIENC NAT 45, V125, P7

[2]

BLANCO LJ, 1984, MEM SOC CIENC NAT SA, V121, P35

[3]

CARBON MJ, 1991, GEMORFOLOGIA ESTRATI

[4]

CARPENTER JAMES H., 1965, LIMNOL OCEANOGR, V10, P135

[5] NEW MEASUREMENTS OF OXYGEN SOLUBILITY IN PURE AND NATURAL WATER [J].

CARPENTER, JH .

LIMNOLOGY AND OCEANOGRAPHY, 1966, 11 (02) :264-+

[6]

Franken M., 1979, TROPICAL ECOLOGY, V20, P211

[7]

FURCH K, 1988, VERH INT VER LIMNOL, V23, P642

[8]

Golterman HL, 1969, IBP HDB, V8

[9] CAUSES OF SEASONALITY IN THE CHEMISTRY OF A LAKE ON THE ORINOCO RIVER FLOODPLAIN, VENEZUELA [J].

HAMILTON, SK ;

LEWIS, WM .

LIMNOLOGY AND OCEANOGRAPHY, 1987, 32 (06) :1277-1290

[10]

Hasler A. D., 1975, COUPLING LAND WATER

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