@Article{AffonsoQueiNovo:2015:AbVaAm,
author = "Affonso, Adriana Gomes and Queiroz, Helder Lima de and Novo, Evlyn
M{\'a}rcia Le{\~a}o de Moraes",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {} and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Abiotic variability among different aquatic systems of the central
Amazon floodplain during drought and flood events",
journal = "Brazilian Journal of Biology",
year = "2015",
volume = "75",
note = "{Setores de Atividade: Pesquisa e desenvolvimento
cient{\'{\i}}fico.}",
keywords = "amazon floodplain, lakes, aquatic systems.",
abstract = "This paper examines water properties from lakes, (depression
lakes, sensu Junk et al., 2012), channels (scroll lakes with high
connectivity, sensu Junk et al., 2012) and paleo-channels (scroll
lakes with low connectivity-sensu Junk et al., 2012, locally
called ressacas) located in Mamirau{\'a} Sustainable Development
Reserve, in Central Amazon floodplain, Amazonas, Brazil. We
analysed surface temperature, conductivity, pH, dissolved oxygen,
turbidity, transparency, suspended inorganic and organic matter,
chlorophyll-a, pheophytin, total nitrogen, total phosphorus,
organic and inorganic carbon in 2009 high water phase, 2009 and
2010 low water phases. Multivariate statistical analyses of 24
aquatic systems (6 ressacas, 12 lakes and 6 channels, 142 samples)
were applied to the variables in order to: 1) quantify differences
among aquatic system types; 2) assess how those differences are
affected in the different phases of the hydrological year. First,
we analysed the entire set of variables to test for differences
among phases of the hydrological year and types of aquatic systems
using a PERMANOVA two-way crossed design. The results showed that
the all measured limnological variables are distinct regarding
both factors: types of aquatic systems and hydrological phases. In
general, the magnitude and amplitude of all variables were higher
in the low water phase than in the high water phase, except for
water transparency in all aquatic systems types. PERMANOVA showed
that the differences between aquatic systems types and
hydrological phases of all variables were highly significant for
both main factors (type and phase) and for the type x phase
interaction. Limnological patterns of Amazon floodplain aquatic
systems are highly dynamic, dependent on the surrounding
environment, flood pulse, main river input and system type. These
patterns show how undisturbed systems respond to natural
variability in such a diverse environment, and how distinct are
those aquatic systems, especially during the low water phase.
Aquatic systems in Mamirau{\'a} floodplain represent limnological
patterns of almost undisturbed areas and can be used as future
reference for comparison with disturbed areas, such as those of
the Lower Amazon, and as a baseline for studies on the effects of
anthropogenic influences and climate change and on Amazon aquatic
ecosystem.",
doi = "10.1590/1519-6984.04214",
url = "http://dx.doi.org/10.1590/1519-6984.04214",
issn = "1519-6984",
label = "lattes: 9857505876280820 3 AffonsoQueiNovo:2015:AbVaAm",
language = "en",
targetfile = "1_affonso.pdf",
urlaccessdate = "28 mar. 2024"
}