Rainfall and drainage basin shape strongly control temporal and spatial variation of dissolved organic matter in a tropical lake

Luciana Pena Mello Brandão; Peter Anton Staehr; Ludmila Silva Brighenti; Daniel Peifer; Francisco Antônio Rodrigues Barbosa; José Fernandes Bezerra-Neto

doi:10.1007/s10201-021-00684-w

Rainfall and drainage basin shape strongly control temporal and spatial variation of dissolved organic matter in a tropical lake

Luciana Pena Mello Brandão^*, Peter Anton Staehr, Ludmila Silva Brighenti, Daniel Peifer, Francisco Antônio Rodrigues Barbosa, José Fernandes Bezerra-Neto

^*Corresponding author for this work

Department of Ecoscience - Marine Diversity and Experimental Ecology

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1 Citation (Scopus)

Abstract

Dissolved organic matter (DOM) is a central driver of many processes in aquatic environments. Here, we address the issue of spatial and temporal variations in DOM quantity and quality in a deep tropical lake (Brazil). We measure DOC, Chl-a, suspended solids, nutrients and CDOM metrics in surface water samples taken from 21 sampling sites during six campaigns, and we quantify their links with water depth and rainfall estimates. Temporal effects explain between 74.5 and 94.5% of the variance in DOC, SUVA₂₅₄, a_CDOM440, and Chl-a, and all those parameters were influenced by rainfall. In contrast, spatial variations affect more S_275-295 and a_CDOM254. The contributing drainage area varies spatially in morphology and geometry, and each portion affects a specific part of the lake, resulting in a spatial variation in DOM quantity and quality. Our findings demonstrate the importance of the input of allochthonous DOM (which depends on seasonal rainfall and drainage area shape) to DOM dynamics in a tropical lake. The study area is receiving lower rates of precipitation in recent times, and our results suggest that this may alter the seasonal patterns of input of DOM and nutrients in the lake, with possible impacts on water quality, aquatic biota and ecosystem functioning.

Original language	English
Journal	Limnology
Volume	23
Issue	1
Pages (from-to)	207-217
Number of pages	11
ISSN	1439-8621
DOIs	https://doi.org/10.1007/s10201-021-00684-w
Publication status	Published - Jan 2022

Keywords

CDOM
DOC
DOM
Spectral slope
SUVA

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10.1007/s10201-021-00684-w

Cite this

@article{6496da5d85294e39a0b9382355d093ec,

title = "Rainfall and drainage basin shape strongly control temporal and spatial variation of dissolved organic matter in a tropical lake",

abstract = "Dissolved organic matter (DOM) is a central driver of many processes in aquatic environments. Here, we address the issue of spatial and temporal variations in DOM quantity and quality in a deep tropical lake (Brazil). We measure DOC, Chl-a, suspended solids, nutrients and CDOM metrics in surface water samples taken from 21 sampling sites during six campaigns, and we quantify their links with water depth and rainfall estimates. Temporal effects explain between 74.5 and 94.5% of the variance in DOC, SUVA254, aCDOM440, and Chl-a, and all those parameters were influenced by rainfall. In contrast, spatial variations affect more S275-295 and aCDOM254. The contributing drainage area varies spatially in morphology and geometry, and each portion affects a specific part of the lake, resulting in a spatial variation in DOM quantity and quality. Our findings demonstrate the importance of the input of allochthonous DOM (which depends on seasonal rainfall and drainage area shape) to DOM dynamics in a tropical lake. The study area is receiving lower rates of precipitation in recent times, and our results suggest that this may alter the seasonal patterns of input of DOM and nutrients in the lake, with possible impacts on water quality, aquatic biota and ecosystem functioning.",

keywords = "CDOM, DOC, DOM, Spectral slope, SUVA",

author = "Brand{\~a}o, {Luciana Pena Mello} and Staehr, {Peter Anton} and Brighenti, {Ludmila Silva} and Daniel Peifer and Barbosa, {Francisco Ant{\^o}nio Rodrigues} and Bezerra-Neto, {Jos{\'e} Fernandes}",

note = "Funding Information: We thank the Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico (CNPq), Coordena{\c c}{\~a}o de Aperfei{\c c}oamento de Pessoal de N{\'i}vel Superior (CAPES) and Funda{\c c}{\~a}o de Amparo {\`a} Pesquisa do Estado de Minas Gerais (FAPEMIG) for financial support. Part of the writing of this manuscript was performed in Aarhus University (Roskilde, Denmark), supported by the project Carbon Cycling in Lakes (COCLAKE.—CAPES Proc No. 88881.030499/2013-01). D.P. had support from CAPES under a CAPES-PrInt Postdoctoral fellowship (No 88887.367976/2019-00). We also thank the laboratories LIMNEA and LGAR (Federal University of Minas Gerais, Minas Gerais, Brazil) for their infrastructure and Nelson Mello, Marcelo Costa, and Patr{\'i}cia Ferreira for all the help in the field and laboratory. Publisher Copyright: {\textcopyright} 2021, The Author(s) under exclusive licence to The Japanese Society of Limnology.",

year = "2022",

month = jan,

doi = "10.1007/s10201-021-00684-w",

language = "English",

volume = "23",

pages = "207--217",

journal = "Limnology",

issn = "1439-8621",

publisher = "Springer",

number = "1",

}

Rainfall and drainage basin shape strongly control temporal and spatial variation of dissolved organic matter in a tropical lake. / Brandão, Luciana Pena Mello; Staehr, Peter Anton; Brighenti, Ludmila Silva et al.
In: Limnology, Vol. 23, No. 1, 01.2022, p. 207-217.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - Rainfall and drainage basin shape strongly control temporal and spatial variation of dissolved organic matter in a tropical lake

AU - Brandão, Luciana Pena Mello

AU - Staehr, Peter Anton

AU - Brighenti, Ludmila Silva

AU - Peifer, Daniel

AU - Barbosa, Francisco Antônio Rodrigues

AU - Bezerra-Neto, José Fernandes

N1 - Funding Information: We thank the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) for financial support. Part of the writing of this manuscript was performed in Aarhus University (Roskilde, Denmark), supported by the project Carbon Cycling in Lakes (COCLAKE.—CAPES Proc No. 88881.030499/2013-01). D.P. had support from CAPES under a CAPES-PrInt Postdoctoral fellowship (No 88887.367976/2019-00). We also thank the laboratories LIMNEA and LGAR (Federal University of Minas Gerais, Minas Gerais, Brazil) for their infrastructure and Nelson Mello, Marcelo Costa, and Patrícia Ferreira for all the help in the field and laboratory. Publisher Copyright: © 2021, The Author(s) under exclusive licence to The Japanese Society of Limnology.

PY - 2022/1

Y1 - 2022/1

N2 - Dissolved organic matter (DOM) is a central driver of many processes in aquatic environments. Here, we address the issue of spatial and temporal variations in DOM quantity and quality in a deep tropical lake (Brazil). We measure DOC, Chl-a, suspended solids, nutrients and CDOM metrics in surface water samples taken from 21 sampling sites during six campaigns, and we quantify their links with water depth and rainfall estimates. Temporal effects explain between 74.5 and 94.5% of the variance in DOC, SUVA254, aCDOM440, and Chl-a, and all those parameters were influenced by rainfall. In contrast, spatial variations affect more S275-295 and aCDOM254. The contributing drainage area varies spatially in morphology and geometry, and each portion affects a specific part of the lake, resulting in a spatial variation in DOM quantity and quality. Our findings demonstrate the importance of the input of allochthonous DOM (which depends on seasonal rainfall and drainage area shape) to DOM dynamics in a tropical lake. The study area is receiving lower rates of precipitation in recent times, and our results suggest that this may alter the seasonal patterns of input of DOM and nutrients in the lake, with possible impacts on water quality, aquatic biota and ecosystem functioning.

AB - Dissolved organic matter (DOM) is a central driver of many processes in aquatic environments. Here, we address the issue of spatial and temporal variations in DOM quantity and quality in a deep tropical lake (Brazil). We measure DOC, Chl-a, suspended solids, nutrients and CDOM metrics in surface water samples taken from 21 sampling sites during six campaigns, and we quantify their links with water depth and rainfall estimates. Temporal effects explain between 74.5 and 94.5% of the variance in DOC, SUVA254, aCDOM440, and Chl-a, and all those parameters were influenced by rainfall. In contrast, spatial variations affect more S275-295 and aCDOM254. The contributing drainage area varies spatially in morphology and geometry, and each portion affects a specific part of the lake, resulting in a spatial variation in DOM quantity and quality. Our findings demonstrate the importance of the input of allochthonous DOM (which depends on seasonal rainfall and drainage area shape) to DOM dynamics in a tropical lake. The study area is receiving lower rates of precipitation in recent times, and our results suggest that this may alter the seasonal patterns of input of DOM and nutrients in the lake, with possible impacts on water quality, aquatic biota and ecosystem functioning.

KW - CDOM

KW - DOC

KW - DOM

KW - Spectral slope

KW - SUVA

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U2 - 10.1007/s10201-021-00684-w

DO - 10.1007/s10201-021-00684-w

M3 - Journal article

AN - SCOPUS:85119674300

SN - 1439-8621

VL - 23

SP - 207

EP - 217

JO - Limnology

JF - Limnology

IS - 1

ER -

Rainfall and drainage basin shape strongly control temporal and spatial variation of dissolved organic matter in a tropical lake

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Keywords

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