Environmental factors affecting chlorophyll-a concentration in tropical floodplain lakes, Central Brazil

Chlorophyll-a (Chl-a) has been widely used in the assessment and monitoring of aquatic environments. Local and regional factors can influence Chl-a concentrations; moreover, the connection between terrestrial and aquatic ecosystems is a major paradigm within aquatic ecology. Here, we investigate the...

Full description

Saved in:
Bibliographic Details
Published in:Environmental monitoring and assessment 2016-11, Vol.188 (11), p.611-611
Main Authors: de Oliveira Marcionilio, Suzana Maria Loures, Machado, Karine Borges, Carneiro, Fernanda Melo, Ferreira, Manuel Eduardo, Carvalho, Priscilla, Vieira, Ludgero Cardoso Galli, de Moraes Huszar, Vera Lúcia, Nabout, João Carlos
Format: Article
Language:English
Subjects:
Brazil
Chlorophyll - analysis
Environmental Monitoring
Lakes - chemistry
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Chlorophyll-a (Chl-a) has been widely used in the assessment and monitoring of aquatic environments. Local and regional factors can influence Chl-a concentrations; moreover, the connection between terrestrial and aquatic ecosystems is a major paradigm within aquatic ecology. Here, we investigate the spatial distribution of Chl-a concentrations in a tropical savannah floodplain in Central Brazil using a broad spatial data set (a 900-km north-south transect; 30 lakes). We determine the relative importance of local environmental variables (limnological and morphometric) and regional (land use) and spatial distances (spatial eigenvector) on Chl-a concentrations using partial linear regression. We evaluate the direct and indirect effects of local and regional variables on Chl-a with a path analysis. Our results indicate spatially autocorrelated patterns wherein lakes in closer proximity showed more similar levels of Chl-a than more distant lakes. Local environmental factors explained most variance in Chl-a (R  = 0.28; P = 0.02); more specifically, both lake area and total nitrogen significantly (P 
ISSN:1573-2959