Soils in seasonally flooded forests as methane sources: A case study of West Siberian South taiga

ABSTRACTThis contribution presents descriptions of 14 fossil woods from the Piedra Chamana Fossil Forest in Peru, an assemblage of fossil woods and leaves dated at 39 Ma (late Middle Eocene). It is part two of the descriptions of the non-monocot angiosperm fossils from the site (see Woodcock et al. 2017). The woods are assigned to the subfamilies Bombacoideae, Bombacoideae/Malvoideae, Byttneroideae, Grewioideae, and Sterculioideae of Malvaceae and the families Melastomataceae, Muntingiaceae, Rubiaceae, Rutaceae, and Sapindaceae. Malvalean taxa make up around one-third of the wood types. Many of the woods are identifiable to modern-day genera or groups, including genera with species counted among the hyperdominant trees of the New World forests. Represented vegetation types include mixed freshwater swamp with Avicennia, seasonally flooded forest, and lowland tropical forest with a dry aspect. The assemblage shows floristic similarities to extant South American lowland tropical forest, particularly the seasonally flooded forests growing along white water rivers (várzea); however, the dry forest association has a less clear analog in the present-day tropics.

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What is the avifauna of Amazonian white-sand vegetation?

Bird Conservation International ◽

10.1017/s0959270915000052 ◽

2015 ◽

Vol 26 (2) ◽

pp. 192-204 ◽

Cited By ~ 18

Author(s):

SÉRGIO HENRIQUE BORGES ◽

CINTIA CORNELIUS ◽

CAMILA RIBAS ◽

RICARDO ALMEIDA ◽

EDSON GUILHERME ◽

...

Keyword(s):

Environmental History ◽

Indicator Species ◽

Amazon Basin ◽

Vegetation Type ◽

Bird Species ◽

White Sand ◽

Flooded Forests ◽

Areas Of Endemism ◽

History Of ◽

Seasonally Flooded

SummaryWhite-sand vegetation (WSV) is a rare vegetation type in the Amazon basin that grows in nutrient impoverished sandy soils that occur as patches of variable size. Associated with this vegetation is bird assemblage that has not yet been fully characterized. Based on published species inventories and our own field data we compile a checklist of bird species recorded in WSV. In addition, we compared the avifauna of WSV with that found in savanna patches, another type of Amazonian open vegetation. WSV hosted a distinctive avifauna including endemic and threatened species. The number of bird species was lower in WSV compared to nearby terra firme forests, seasonally flooded forests and Amazonian savannas. Despite its low diversity, the avifauna of WSV has a distinctive species composition and makes a significant contribution to Amazonian beta diversity. At least 35 bird species can be considered as indicator species for this environment. Previously identified areas of endemism within the Amazon basin house at least one WSV indicator bird including cases of congeneric species with allopatric distributions. Seven of the WSV indicator species (20% of this avifauna) are in an IUCN threatened category, with one species Polioptila clementsi considered Critically Endangered. Their isolated distribution, small area occupied, and fragility to human-driven disturbances makes WSV one of the most threatened vegetation types in the Amazon basin. The study of WSV avifauna contributes to a better understanding of mechanisms that generate and maintain species diversity as well as of the environmental history of the most biologically diverse biome of the planet.

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Leaf-litter decomposition across three flooding regimes in a seasonally flooded Amazonian watershed

Journal of Tropical Ecology ◽

10.1017/s0266467410000635 ◽

2011 ◽

Vol 27 (2) ◽

pp. 205-210 ◽

Cited By ~ 17

Author(s):

Krista A. Capps ◽

Manuel A. S. Graça ◽

Andrea C. Encalada ◽

Alexander S. Flecker

Keyword(s):

Leaf Litter ◽

Litter Decomposition ◽

Amazon Basin ◽

Nutrient Dynamics ◽

Leaf Litter Decomposition ◽

Transition Zones ◽

Flooded Forests ◽

Terrestrial Habitats ◽

Seasonally Flooded ◽

Energy Pathways

Decomposition of leaf litter is an important process that releases energy and nutrients in both terrestrial and aquatic environments (Moore et al. 2004, Wallace et al. 1997); therefore, the physical, chemical and biological processes controlling leaf-litter decomposition rates can affect nutrient cycling and productivity in these systems (Cross et al. 2007, Wood et al. 2009). Several studies have shown that leaf decomposition is faster in aquatic than in terrestrial habitats due to relatively constant temperatures, continuous leaching and the physical breakdown of leaves by flowing water (Hutchens & Wallace 2002, Langhans & Tockner 2006, Langhans et al. 2008). Yet, comparatively few studies have examined these relationships in tropical systems with flooded forests. Flooding is a predominant feature of the upper Amazon Basin, but its occurrence and magnitude is complex and not strictly seasonal (Junk et al. 1989). To identify the dominant energy pathways and understand the nutrient dynamics of upper Amazon rain forests, it is imperative to investigate organic matter processing in the aquatic/terrestrial transition zones of these ecosystems.

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Geographic range extension of Elachistocleis corumbaensis Piva, Caramaschi & Albuquerque, 2017 (Anura, Microhylidae) with new records in ecotonal zones in the state of Mato Grosso, Brazil

Check List ◽

10.15560/15.1.17 ◽

2019 ◽

Vol 15 (1) ◽

pp. 17-20

Author(s):

Vancleber Divino Silva-Alves ◽

Rosana dos Santos D'Avila ◽

Thatiane Martins da Costa ◽

Ana Paula Dalbem Barbosa ◽

Bruno Ramos Brum ◽

...

Keyword(s):

Protected Area ◽

New Records ◽

Geographic Range ◽

The State ◽

Riparian Forests ◽

Mato Grosso ◽

Paraguay River ◽

Flooded Forests ◽

Seasonally Flooded ◽

Brazilian Pantanal

Elachistocleis corumbaensis was documented in 2017 in the central region of the Brazilian Pantanal and no other record of the species has since been reported. In this study, we report on the extension of the geographic range of E. corumbaensis based on 4 new records found in the riparian forests of the Paraguay River, in the state of Mato Grosso. Of these, 1 specimen was collected in a protected area in the Pantanal. We also report on the presence of this species in the ecotones between the Pantanal, Cerrado, and Amazonia, which suggests that E. corumbaensis is associated with seasonally flooded forests but more widely distributed in western Brazil than previously reported.

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Genetic Variability, Divergence and Speciation in Trees of Periodically Flooded Forests of the Amazon: A Case Study of Himatanthus sucuuba (Spruce) Woodson

Ecological Studies - Amazonian Floodplain Forests ◽

10.1007/978-90-481-8725-6_15 ◽

2010 ◽

pp. 301-312 ◽

Cited By ~ 3

Author(s):

Cristiane S. Ferreira ◽

Antonio V. O. Figueira ◽

Rogério Gribel ◽

Florian Wittmann ◽

Maria T. F. Piedade

Keyword(s):

Genetic Variability ◽

Flooded Forests

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Serrapilheira e Efluxo de Co2 do Solo em Floresta Sazonalmente Alagável no Pantanal Brasileiro

Ensaios e Ciência C Biológicas Agrárias e da Saúde ◽

10.17921/1415-6938.2017v21n3p178-182 ◽

2018 ◽

Vol 21 (3) ◽

pp. 178

Author(s):

Ludymilla Barbosa da Silva ◽

Jonathan Willian Zangeski Novais ◽

Luciana Sanches ◽

Nadja Gomes Machado ◽

Aryadne Marcia Aquino ◽

...

Keyword(s):

Soil Moisture ◽

Litter Production ◽

Co2 Efflux ◽

Soil Co2 ◽

Mato Grosso ◽

Flooded Forests ◽

The World ◽

Vochysia Divergens ◽

Seasonally Flooded ◽

Determining Factor

Áreas naturais alagadas estão entre os ecossistemas com alta produtividade e são amplamente distribuídas no mundo. O Pantanal se constitui uma das maiores planícies inundáveis contínuas do mundo e cerca de 30% da sua área compreende florestas sazonalmente inundáveis. Nesse sentido, o presente trabalho visa contribuir para a compreensão de processos pouco estudados nas florestas inundáveis como a serrapilheira, e efluxo de CO2 no solo, ambos influenciados pelas cheias pantaneiras. Tendo em vista a importância desses ecossistemas florestais, o objetivo geral deste trabalho foi analisar a dinâmica de serrapilheira e efluxo de CO2 em uma floresta sazonalmente inundável no Pantanal Mato- Grossense. Foram monitorados 55 pontos em 5 transectos para medições de efluxo de CO2, IAF e umidade do solo, além de 20 coletores de 1m2 para coletas de serrapilheira. A média de produção mensal de serrapilheira foi de 1005 g m-2 para litterpool e 213 g m-2 para a litterfall. A média anual do efluxo foi de 1,11 g CO2 m-2 h-1, ocorrendo em setembro o menor valor, mês mais seco, 0,691 g CO2 m-2 h-1. Houve sazonalidade característica para todas as variáveis analisadas, sendo a diminuição da umidade do solo fator determinante para a produção de serrapilheira e inibição do efluxo de CO2 do solo.Palavras-chaves: Litterpool. Litterfall. Dióxido de Carbono. Respiração do Solo. Vochysia Divergens Phol.AbstractFlooded natural areas are among the ecosystems with high ecological productivity and are widely distributed in the world. Pantanal is one of the largest continuous floodplains in the world and about 30% of its area comprises seasonally flooded forests. In this sense, the present work aims to contribute to the understanding of processes that are not studied in the floodplain forests, such as litter, and CO2 efflux in the soil, both influenced by the floods pulse. Considering the importance of these forest ecosystems, the general objective of this work was to analyze the litter dynamics and CO2 efflux in a seasonally flooded forest in Mato Grosso Pantanal. Fifty-five points were monitored in 5 transects for measurements of CO2 efflux, LAI and soil moisture, and 20 collectors of 1m2 for litter collection. The average monthly litter yield was 1005 g m-2 for litterpool and 213 g m-2 for litterfall. The annual average of the efflux was 1.11 g CO2 m-2 h-1, occurring in September the lowest value, the driest month, 0.691 g CO2 m-2 h-1. There was a characteristic seasonality for all analyzed variables, being the decrease of the soil moisture determining factor for litter production and inhibition of soil CO2 efflux.Keywords: Litterpool. Litterfall. Carbon Dioxide. Soil Respiration. Vochysia Divergens Phol.

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