Biogeochemical processes and the diversity of Nhecolandia lakes, Brazil

被引:17
|
作者
Almeida, Teodoro I. R. [1 ]
Calijuri, Maria do Carmo [2 ]
Falco, Patricia B. [2 ]
Casali, Simone P. [2 ]
Kupriyanova, Elena [3 ]
Paranhos Filho, Antonio C. [4 ]
Sigolo, Joel B. [1 ]
Bertolo, Reginaldo A. [1 ]
机构
[1] Univ Sao Paulo, Inst Geociencias, BR-05508080 Sao Paulo, Brazil
[2] Univ Sao Paulo, Escola Engn Sao Carlos, BR-13566590 Sao Carlos, SP, Brazil
[3] Russian Acad Sci, Inst Plant Physiol, Moscow 127276, Russia
[4] Univ Fed Mato Grosso do Sul, Ctr Ciencias Exatas & Tecnol, BR-79000060 Campo Grande, MS, Brazil
来源
ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS | 2011年 / 83卷 / 02期
基金
巴西圣保罗研究基金会;
关键词
Pantanal; alkaline lakes; saline lakes; cyanobacteria; alkalinization processes; PANTANAL WETLAND; ALKALINE; SALINE; PHYTOPLANKTON; WATER;
D O I
10.1590/S0001-37652011000200004
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The Pantanal of Nhecolandia, the world's largest and most diversified field of tropical lakes, comprises approximately 10,000 lakes, which cover an area of 24,000 km(2) and vary greatly in salinity, pH, alkalinity, colour, physiography and biological activity. The hyposaline lakes have variable pHs, low alkalinity, macrophytes and low phytoplankton densities. The saline lakes have pHs above 9 or 10, high alkalinity, a high density of phytoplankton and sand beaches. The cause of the diversity of these lakes has been an open question, which we have addressed in our research. Here we propose a hybrid process, both geochemical and biological, as the main cause, including (1) a climate with an important water deficit and poverty in Ca2+ in both superficial and phreatic waters; and (2) an elevation of pH during cyanobacteria blooms. These two aspects destabilise the general tendency of Earth's surface waters towards a neutral pH. This imbalance results in an increase in the pH and dissolution of previously precipitated amorphous silica and quartzose sand. During extreme droughts, amorphous silica precipitates in the inter-granular spaces of the lake bottom sediment, increasing the isolation of the lake from the phreatic level. This paper discusses this biogeochemical problem in the light of physicochemical, chemical, altimetric and phytoplankton data.
引用
收藏
页码:391 / 407
页数:17
相关论文
共 50 条
  • [41] How Ground Penetrating Radar helps to understand the Nhecolandia lakes landscape in the Brazilian Pantanal wetland
    Taioli, Fabio
    Martinho dos Santos, Mauricio Guerreiro
    Assine, Mario Luis
    Mendes, Deborah
    BRAZILIAN JOURNAL OF GEOLOGY, 2021, 51 (02)
  • [42] Composition and diversity of phytophilous cladocerans of oxbow lakes of Southwest Amazonian, Acre state, Brazil
    Cabral, Guilherme Sampaio
    da Silva, Ronaldo Souza
    Goncalves Araujo, Ronnilda Maria
    Ghidini, Andre Ricardo
    BIOTA NEOTROPICA, 2021, 21 (02):
  • [43] Microbialites and microbial communities: Biological diversity, biogeochemical functioning, diagenetic processes, tracers of environmental changes
    Camoin, GF
    Gautret, P
    SEDIMENTARY GEOLOGY, 2006, 185 (3-4) : 127 - 130
  • [44] Biogeochemical processes in the Chukchi Sea
    A. Yu. Lein
    A. S. Savvichev
    I. I. Rusanov
    G. A. Pavlova
    N. A. Belyaev
    K. Craine
    N. V. Pimenov
    M. V. Ivanov
    Lithology and Mineral Resources, 2007, 42 : 221 - 239
  • [45] Biogeochemical processes in the Chukchi Sea
    Lein, A. Yu.
    Savvichev, A. S.
    Rusanov, I. I.
    Pavlova, G. A.
    Belyaev, N. A.
    Craine, K.
    Pimenov, N. V.
    Ivanov, M. V.
    LITHOLOGY AND MINERAL RESOURCES, 2007, 42 (03) : 221 - 239
  • [46] Plankton diversity and dynamics in the upper surface of the Indian sector of the Southern Ocean ecosystem and biogeochemical processes
    Sreerag, A.
    Mishra, Rajani Kanta
    Naik, Ravidas K.
    Venkataramana, V.
    Soares, Melena A.
    Mahale, Resha
    Anilkumar, N.
    Gauns, Mangesh
    REGIONAL STUDIES IN MARINE SCIENCE, 2023, 65
  • [47] Carbohydrates as indicators of biogeochemical processes
    E. V. Lazareva
    E. A. Romankevich
    Oceanology, 2012, 52 : 335 - 344
  • [48] Carbohydrates as indicators of biogeochemical processes
    Lazareva, E. V.
    Romankevich, E. A.
    OCEANOLOGY, 2012, 52 (03) : 335 - 344
  • [49] ARBUSCULAR MYCORRHIZAL FUNGI IN VEGETATION TYPES IN THE PANTANAL OF NHECOLANDIA, MATO GROSSO DO SUL, BRAZIL
    Oliveira Gomide, Plinio Henrique
    Naves Silva, Marx Leandro
    Fonseca Sousa Soares, Claudio Roberto
    Cardoso, Evaldo Luis
    de Carvalho, Fernanda
    Leal, Patricia Lopes
    Marques, Rodrigo Magalhaes
    Stuermer, Sidney Luiz
    REVISTA BRASILEIRA DE CIENCIA DO SOLO, 2014, 38 (04): : 1114 - 1127
  • [50] BIOGEOCHEMICAL STUDY OF ORGANIC-SUBSTANCES IN ANTARCTIC LAKES
    MATSUMOTO, GI
    HYDROBIOLOGIA, 1989, 172 : 265 - 289