Terrestrial organic matter input suppresses biomass production in lake ecosystems

• Terrestrial ecosystems export large amounts of organic carbon (t-OC) but the net effect of this OC on the productivity of recipient aquatic ecosystems is largely unknown. In this study of boreal lakes, we show that the relative contribution of t-OC to individual top consumer (fish) biomass production, and to most of their potential prey organisms, increased with the concentration of dissolved organic carbon (DOC; dominated by t-OC sources) in water. However, the biomass and production of top consumers decreased with increasing concentration of DOC, despite their substantial use (up to 60%) of t-OC. Thus, the results suggest that although t-OC supports individual consumer growth in lakes to a large extent, t-OC input suppresses rather than subsidizes population biomass production.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)

NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

Nyckelord

allochthonous organic matter

boreal lakes

lake ecosystem

productivity

subsidy

terrestrial organic rbon

t-OC

Umea

Sweden

LGIORGIO PA

1994

LIMNOLOGY AND OCEANOGRAPHY

V39

P772 nentzap Andrew J.

2014

NATURE COMMUNICATIONS

V5

rphy J

1962

Anal Chim Acta

V27

P31 lis GA

1997

ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS

V28

P289 rlsson Jan

2012

LIMNOLOGY AND OCEANOGRAPHY

V57

P1042 dasz Cristian

2012

LIMNOLOGY AND OCEANOGRAPHY

V57

P163 pelberg M

1995

WATER AIR AND SOIL POLLUTION5th International Conference on Acidic Deposition - ience and Policy: Acid Reign 95

JUN 26-30

1995

GOTHENBURG

SWEDEN

V85

P401 ehl S

2005

ECOLOGY

V86

P2931 nes Stuart E.

2012

Freshwater Reviews

V5

P37 gesten G

2004

GLOBAL CHANGE BIOLOGY

V10

P141 rsson L.

1988

P203 rsson L

1996

ECOLOGY

V77

P900 rane Jan-Erik

2014

ECOSYSTEMS

V17

P1040 rlsson J

2004

FRESHWATER BIOLOGY

V49

P526 rlsson J

2005

LIMNOLOGY AND OCEANOGRAPHY

V50

P538 rlsson Jan

2007

OIKOS

V116

P1691 asko Ashley D.

2012

ENVIRONMENTAL REVIEWS

V20

P173 nstad Anders G.

2014

ECOLOGY LETTERS

V17

P36 rpenter SR

1998

LIMNOLOGY AND OCEANOGRAPHY

V43

P73 helker J.

2012

Journal of Geophysical Research (Biogeosciences)

V117

P1011 lomon Christopher T.

2011

ECOLOGY

V92

P1115 rggren Martin

2014

ECOLOGY

V95

P1947

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)