Climate-induced changes in the dissolved organic carbon budgets of boreal lakes

被引：251

作者：

Schindler, DW ^{[1
]}

Curtis, PJ ^{[1
]}

Bayley, SE ^{[1
]}

Parker, BR ^{[1
]}

Beaty, KG ^{[1
]}

Stainton, MP ^{[1
]}

机构：

[1] FISHERIES & OCEANS CANADA,INST FRESHWATER,WINNIPEG,MB R3T 2N6,CANADA

来源：

BIOGEOCHEMISTRY | 1997年 / 36卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

dissolved organic carbon; climatic change; mass balance budgets; lake acidification;

D O I：

10.1023/A:1005792014547

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

During 20 years of climatic warming, drought and increased forest fires between 1970 and 1990, DOC concentrations declined by 15-25% in lakes of the Experimental Lakes Area, northwestern Ontario, allowing increased penetration of both UV and photosynthetically-active radiation (PAR), and causing deeper euphotic zones and thermoclines. Decreased input to the lakes of DOC from terrestrial catchments and upstream lakes was the primary reason for the decline, although in-lake removal also increased slightly. Decreased streamflow caused by drought was more important than forest fires in affecting DOC exports from catchments. Experimental acidification of lakes caused even greater losses in DOG, by enhancing rates of in-lake removal. DOC in Lake 302S, acidified to pH 4.5 during the 1980's, declined to less than 10% of preacidification values.

引用

页码：9 / 28

页数：20

共 33 条

[1] EFFECTS OF MULTIPLE FIRES ON NUTRIENT YIELDS FROM STREAMS DRAINING BOREAL FOREST AND FEN WATERSHEDS - NITROGEN AND PHOSPHORUS [J].

BAYLEY, SE ;

SCHINDLER, DW ;

BEATY, KG ;

PARKER, BR ;

STAINTON, MP .

CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1992, 49 (03) :584-596

[2] EFFECTS OF FOREST-FIRE AND DROUGHT ON ACIDITY OF A BASE-POOR BOREAL FOREST STREAM - SIMILARITIES BETWEEN CLIMATIC WARMING AND ACIDIC PRECIPITATION [J].

BAYLEY, SE ;

SCHINDLER, DW ;

PARKER, BR ;

STAINTON, MP ;

BEATY, KG .

BIOGEOCHEMISTRY, 1992, 17 (03) :191-204

[3]

BEATY KG, 1989, CAN DATA REP FISH AQ, V159

[4] GEOGRAPHY AND BATHYMETRY OF SELECTED LAKE BASINS, EXPERIMENTAL LAKES AREA, NORTHWESTERN ONTARIO [J].

BRUNSKILL, GJ ;

SCHINDLER, DW .

JOURNAL OF THE FISHERIES RESEARCH BOARD OF CANADA, 1971, 28 (02) :139-+

[5] Hydrologic control of dissolved organic matter in low-order Precambrian Shield Lakes [J].

Curtis, PJ ;

Schindler, DW .

BIOGEOCHEMISTRY, 1997, 36 (01) :125-138

[6] Dissolved organic and inorganic carbon mass balances in central Ontario lakes [J].

Dillon, PJ ;

Molot, LA .

BIOGEOCHEMISTRY, 1997, 36 (01) :29-42

[7] PARTITIONING LIGHT ATTENUATION IN AN ACIDIC LAKE [J].

EFFLER, SW ;

SCHAFRAN, GC ;

DRISCOLL, CT .

CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1985, 42 (11) :1707-1711

[8] INFLUENCE OF VEGETATION AND HYDROLOGY ON THE HUMUS BUDGETS OF LABRADOR LAKES [J].

ENGSTROM, DR .

CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1987, 44 (07) :1306-1314

[9]

FEE EJ, 1996, IN PRESS LIMNOL OCEA, V41

[10]

HENGEVELD H, 1991, 912 SOE ENV CAN ATM

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