Daily availability of nutrients and metals in a eutrophic meso-tidal coastal lagoon (Óbidos lagoon, Portugal)

Patrícia Pereira; Hilda de Pablo; Susana Carvalho; Carlos Vale; Mário Pacheco

doi:10.1016/j.marpolbul.2010.07.021

Daily availability of nutrients and metals in a eutrophic meso-tidal coastal lagoon (Óbidos lagoon, Portugal)

Patrícia Pereira^*, Hilda de Pablo, Susana Carvalho, Carlos Vale, Mário Pacheco

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

This baseline reports daily variations of physico-chemical parameters, nutrients and metals in water of two sites [eutrophic conditions (BB) versus reference (LL)] in Óbidos coastal lagoon (Portugal). Dissolved oxygen in BB varied between 40% saturation levels (night) and 190% (daylight). NH4+, PO43- and ratios to Al of Mn, Fe and Pb in suspended particulate matter increased during the period of lower oxygenation, indicating exportation of nutrients and metals from the sediment to water at night. At LL, O₂ values oscillated always around 100%. PO43- and Mn/Al ratio at LL were always lower than at BB and no increases were found during the night. The input of PO43- and Mn provided from the sediment at BB during the night could surpass the contribution of freshwater discharges. PCA confirmed the separation of most samples from BB and LL. These results pointed to the importance of assessing chemical conditions over day-night cycles.

Original language	English (US)
Pages (from-to)	1868-1872
Number of pages	5
Journal	Marine pollution bulletin
Volume	60
Issue number	10
DOIs	https://doi.org/10.1016/j.marpolbul.2010.07.021
State	Published - Oct 2010
Externally published	Yes

Keywords

Day-night cycles
Environmental health assessment
Eutrophication
Metals
Nutrients
Óbidos lagoon

ASJC Scopus subject areas

Oceanography
Aquatic Science
Pollution

Access to Document

10.1016/j.marpolbul.2010.07.021

Cite this

@article{df4ad1ea11224c73870ea91b26bff207,

title = "Daily availability of nutrients and metals in a eutrophic meso-tidal coastal lagoon ({\'O}bidos lagoon, Portugal)",

abstract = "This baseline reports daily variations of physico-chemical parameters, nutrients and metals in water of two sites [eutrophic conditions (BB) versus reference (LL)] in {\'O}bidos coastal lagoon (Portugal). Dissolved oxygen in BB varied between 40% saturation levels (night) and 190% (daylight). NH4+, PO43- and ratios to Al of Mn, Fe and Pb in suspended particulate matter increased during the period of lower oxygenation, indicating exportation of nutrients and metals from the sediment to water at night. At LL, O2 values oscillated always around 100%. PO43- and Mn/Al ratio at LL were always lower than at BB and no increases were found during the night. The input of PO43- and Mn provided from the sediment at BB during the night could surpass the contribution of freshwater discharges. PCA confirmed the separation of most samples from BB and LL. These results pointed to the importance of assessing chemical conditions over day-night cycles.",

keywords = "Day-night cycles, Environmental health assessment, Eutrophication, Metals, Nutrients, {\'O}bidos lagoon",

author = "Patr{\'i}cia Pereira and {de Pablo}, Hilda and Susana Carvalho and Carlos Vale and M{\'a}rio Pacheco",

year = "2010",

month = oct,

doi = "10.1016/j.marpolbul.2010.07.021",

language = "English (US)",

volume = "60",

pages = "1868--1872",

journal = "Marine pollution bulletin",

issn = "0025-326X",

publisher = "Elsevier Ltd",

number = "10",

}

TY - JOUR

T1 - Daily availability of nutrients and metals in a eutrophic meso-tidal coastal lagoon (Óbidos lagoon, Portugal)

AU - Pereira, Patrícia

AU - de Pablo, Hilda

AU - Carvalho, Susana

AU - Vale, Carlos

AU - Pacheco, Mário

PY - 2010/10

Y1 - 2010/10

N2 - This baseline reports daily variations of physico-chemical parameters, nutrients and metals in water of two sites [eutrophic conditions (BB) versus reference (LL)] in Óbidos coastal lagoon (Portugal). Dissolved oxygen in BB varied between 40% saturation levels (night) and 190% (daylight). NH4+, PO43- and ratios to Al of Mn, Fe and Pb in suspended particulate matter increased during the period of lower oxygenation, indicating exportation of nutrients and metals from the sediment to water at night. At LL, O2 values oscillated always around 100%. PO43- and Mn/Al ratio at LL were always lower than at BB and no increases were found during the night. The input of PO43- and Mn provided from the sediment at BB during the night could surpass the contribution of freshwater discharges. PCA confirmed the separation of most samples from BB and LL. These results pointed to the importance of assessing chemical conditions over day-night cycles.

AB - This baseline reports daily variations of physico-chemical parameters, nutrients and metals in water of two sites [eutrophic conditions (BB) versus reference (LL)] in Óbidos coastal lagoon (Portugal). Dissolved oxygen in BB varied between 40% saturation levels (night) and 190% (daylight). NH4+, PO43- and ratios to Al of Mn, Fe and Pb in suspended particulate matter increased during the period of lower oxygenation, indicating exportation of nutrients and metals from the sediment to water at night. At LL, O2 values oscillated always around 100%. PO43- and Mn/Al ratio at LL were always lower than at BB and no increases were found during the night. The input of PO43- and Mn provided from the sediment at BB during the night could surpass the contribution of freshwater discharges. PCA confirmed the separation of most samples from BB and LL. These results pointed to the importance of assessing chemical conditions over day-night cycles.

KW - Day-night cycles

KW - Environmental health assessment

KW - Eutrophication

KW - Metals

KW - Nutrients

KW - Óbidos lagoon

UR - http://www.scopus.com/inward/record.url?scp=77957119627&partnerID=8YFLogxK

U2 - 10.1016/j.marpolbul.2010.07.021

DO - 10.1016/j.marpolbul.2010.07.021

M3 - Article

C2 - 20696439

AN - SCOPUS:77957119627

SN - 0025-326X

VL - 60

SP - 1868

EP - 1872

JO - Marine pollution bulletin

JF - Marine pollution bulletin

IS - 10

ER -

Daily availability of nutrients and metals in a eutrophic meso-tidal coastal lagoon (Óbidos lagoon, Portugal)

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this