Ecosystem metabolism in a temporary Mediterranean marsh (Donana National Park, SW Spain)

O. Geertz-Hansen; C. Montes; C.M. Duarte; Kaj Sand Jensen; N. Marba; P. Grillas

doi:10.5194/bg-8-963-2011

Ecosystem metabolism in a temporary Mediterranean marsh (Donana National Park, SW Spain)

O. Geertz-Hansen, C. Montes, C.M. Duarte, Kaj Sand Jensen, N. Marba, P. Grillas

Freshwater Biology

14 Citationer (Scopus)

458 Downloads (Pure)

Abstract

metabolic balance of the open waters supporting submerged macrophytes of the Donana marsh (SW Spain) was investigated in spring, when community production is highest. The marsh community (benthic + pelagic) was net autotrophic with net community production rates averaging 0.61 g C m(-2) d(-1), and gross production rates exceeding community respiration rates by, on average, 43%. Net community production increased greatly with increasing irradiance, with the threshold irradiance for communities to become net autotrophic ranging from 42 to 255 mu E m(-2) s(-1), with net heterotrophic at lower irradiance. Examination of the contributions of the benthic and the pelagic compartments showed the pelagic compartment to be strongly heterotrophic (average P/R ratio = 0.27), indicating that the metabolism of the pelagic compartment is highly subsidised by excess organic carbon produced in the strongly autotrophic benthic compartment (average P/R = 1.58)

Originalsprog	Engelsk
Tidsskrift	Biogeosciences
Vol/bind	8
Udgave nummer	4
Sider (fra-til)	963-971
Antal sider	9
ISSN	1726-4170
DOI	https://doi.org/10.5194/bg-8-963-2011
Status	Udgivet - 2011

Emneord

AQUATIC ECOSYSTEMS
SALT-MARSH
MACROPHYTES
GROWTH
PHYTOPLANKTON
PRODUCTIVITY
ESTUARY
CARBON

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10.5194/bg-8-963-2011

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Citationsformater

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title = "Ecosystem metabolism in a temporary Mediterranean marsh (Donana National Park, SW Spain)",

abstract = "The metabolic balance of the open waters supporting submerged macrophytes of the Do{\~n}ana marsh (SW Spain) was investigated in spring, when community production is highest. The marsh community (benthic + pelagic) was net autotrophic with net community production rates averaging 0.61 g C m -2 d-1, and gross production rates exceeding community respiration rates by, on average, 43%. Net community production increased greatly with increasing irradiance, with the threshold irradiance for communities to become net autotrophic ranging from 42 to 255 μE m -2 s-1, with net heterotrophic at lower irradiance. Examination of the contributions of the benthic and the pelagic compartments showed the pelagic compartment to be strongly heterotrophic (average P/R ratio Combining double low line 0.27), indicating that the metabolism of the pelagic compartment is highly subsidised by excess organic carbon produced in the strongly autotrophic benthic compartment (average P/R Combining double low line 1.58).",

keywords = "AQUATIC ECOSYSTEMS, SALT-MARSH, MACROPHYTES, GROWTH, PHYTOPLANKTON, PRODUCTIVITY, ESTUARY, CARBON",

author = "O. Geertz-Hansen and C. Montes and C.M. Duarte and Jensen, {Kaj Sand} and N. Marba and P. Grillas",

year = "2011",

doi = "10.5194/bg-8-963-2011",

language = "English",

volume = "8",

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journal = "Biogeosciences",

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TY - JOUR

T1 - Ecosystem metabolism in a temporary Mediterranean marsh (Donana National Park, SW Spain)

AU - Geertz-Hansen, O.

AU - Montes, C.

AU - Duarte, C.M.

AU - Jensen, Kaj Sand

AU - Marba, N.

AU - Grillas, P.

PY - 2011

Y1 - 2011

N2 - The metabolic balance of the open waters supporting submerged macrophytes of the Doñana marsh (SW Spain) was investigated in spring, when community production is highest. The marsh community (benthic + pelagic) was net autotrophic with net community production rates averaging 0.61 g C m -2 d-1, and gross production rates exceeding community respiration rates by, on average, 43%. Net community production increased greatly with increasing irradiance, with the threshold irradiance for communities to become net autotrophic ranging from 42 to 255 μE m -2 s-1, with net heterotrophic at lower irradiance. Examination of the contributions of the benthic and the pelagic compartments showed the pelagic compartment to be strongly heterotrophic (average P/R ratio Combining double low line 0.27), indicating that the metabolism of the pelagic compartment is highly subsidised by excess organic carbon produced in the strongly autotrophic benthic compartment (average P/R Combining double low line 1.58).

AB - The metabolic balance of the open waters supporting submerged macrophytes of the Doñana marsh (SW Spain) was investigated in spring, when community production is highest. The marsh community (benthic + pelagic) was net autotrophic with net community production rates averaging 0.61 g C m -2 d-1, and gross production rates exceeding community respiration rates by, on average, 43%. Net community production increased greatly with increasing irradiance, with the threshold irradiance for communities to become net autotrophic ranging from 42 to 255 μE m -2 s-1, with net heterotrophic at lower irradiance. Examination of the contributions of the benthic and the pelagic compartments showed the pelagic compartment to be strongly heterotrophic (average P/R ratio Combining double low line 0.27), indicating that the metabolism of the pelagic compartment is highly subsidised by excess organic carbon produced in the strongly autotrophic benthic compartment (average P/R Combining double low line 1.58).

KW - AQUATIC ECOSYSTEMS

KW - SALT-MARSH

KW - MACROPHYTES

KW - GROWTH

KW - PHYTOPLANKTON

KW - PRODUCTIVITY

KW - ESTUARY

KW - CARBON

U2 - 10.5194/bg-8-963-2011

DO - 10.5194/bg-8-963-2011

M3 - Journal article

SN - 1726-4170

VL - 8

SP - 963

EP - 971

JO - Biogeosciences

JF - Biogeosciences

IS - 4

ER -

Ecosystem metabolism in a temporary Mediterranean marsh (Donana National Park, SW Spain)

Abstract

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