Here we use a top-down and bottom-up approach in landscape ecology to analyze the active microbes processing methane fluxes (FCH4) in seasonally flooded-forest (FOR) andtraditional farming systems (TFS) in Amazonian floodplains flooded with black, white, and clear water. Our results revealed higher CH4 emissions from water-atmosphere interface in clear water floodplain, followed by black and white water floodplain, respectively. Active methanogenic and methanotrophic taxa were ubiquitous at 0-15 and 15-30 cm soil layer in FOR and TFS, with differences among the water types with respect to the richness, evenness and diversity of the methanogenic communities. These ecological results were not generalizable regarding to FOR and TFS sites, soil layers, and non-flooded and flooded periods. Despite the predominant oxidation of CH4 in the non-flooded period, higher richness and diversity of methanotrophs were revealed for FOR and TFS in the flooded period. In turn, the structure of the methanogenic and methanotrophic communities and their variation were influenced mainly by soil physicochemical factors, water type, soil depth and the presence of nitrifiers, as Nitrososphaera and Nitrospira. Our study reveals a signature across methanotrophic communities in soils from Amazon floodplain with different water types, with a putative disproportionate role of NC10 phylum in CH4 mitigation in natural and agricultural Amazonian floodplains. These findings open the possibilities to explore the role of NC10 phylum in the carbon cycling in Amazon.

Motivation: Leaf traits represent an important component of plant functional strategies, and those related to carbon fixation and nutrient acquisition form the leaf economics spectrum. However, observations of functional leaf traits are underrepresented in tropical regions in comparison with those in temperate areas. Brazil, a country with continental scale and vast biodiversity is a timely example, where many biomes are impacted by human activities and climate change. However, leaf traits relevant to understand vegetation responses to these impacts remain poorly quantified for many species found in the country. We compiled an extensive data set of four functional leaf traits for native woody species occurring in the Brazilian territory. In addition to trait observations, sampling dates and geo-references were compiled and climatic parameters and soil properties of each sampling site were extracted from several databases. Main types of variables contained:The LT-Brazil data set contains 3,479, 1,216, 775 and 775 clean observations of leaf mass per area, leaf nitrogen (N) concentration per unit mass, leaf phosphorus (P) concentration per unit mass, and leaf N : P ratio, respectively, from native woody species, encompassing information of biome, vegetation, taxonomic data, geographical coordinates, climatic parameters, as well as soil properties. Spatial location and grain: We compiled trait observations from 223 sites under native vegetation distributed in all main biomes (i.e., Amazônia, Caatinga, Cerrado, Mata Atlântica, Pampa and Pantanal) across the Brazilian territory. Time period and grain: The data represent information published and/or sampled during the last 25 years.| 2137 MARIANO et Al.

RESUMO:O uso de jogos lúdicos no processo de ensino-aprendizagem nas aulas de química é uma maneira encontrada pelos professores para que o ensino de torne didático no cotidiano dos alunos. Assim, este artigo tem uma breve discussão sobre qual o conceito de jogos lúdi-cos, e de que maneira esses jogos podem influenciar no cotidiano da aprendizagem do ensino de Química, feita através de um questionário estruturado, apresentado e respondido por alunos do 9° ano do Colégio São Paulo, localizado no município de Belém, Estado do Pará. Como metodologia foi usada questionário estruturado de caráter objetivo para melhor compreensão da visão dos alunos quanto as práticas de jogos como modelo de ensino de química. Conclui-se que a utilização de jogos didáticos é um instrumento de ensino que facilita a aprendizagem por despertar o interesse do educando e motivá-lo a aprender de forma mais prazerosa. Os resultados obtidos sugerem que os jogos educacionais atuam como ferramentas eficientes nos processos de ensino e aprendizagem da Química. Palavras-chave: Alunos, Ensino fundamental, Didática. Use of playful games in the teaching-learning process in Chemistry classes ABSTRACT:The use of playful games in the process of teaching learning in chemistry classes is a way found by teachers so that teaching becomes pedagogical in the daily life of students. Thus, this article has a brief discussion about the concept of playful games, and how these games can influence the daily learning of teaching chemistry, made through a structured questionnaire, presented and answered by students of the 9° year of the college São Paulo, situated in Belém, State of Pará. As a methodology was used a structured questionnaire of objective character to better understands the students' vision regarding the practice of games as a model of teaching of chemistry. It is concluded that the use of teaching games is a teaching tool that facilitates learning by arousing the student's interest and motivating him to learn in more pleasurable way. The results obtaines suggest that educational games act as efficient tools in the teaching and learning process of chemistry.

Motivation SIA‐BRA is a data set that compiles stable carbon (C) and nitrogen (N) isotope ratios of terrestrial and aquatic animals sampled in Brazilian biomes and coastal marine areas. Stable isotope ratios are helpful in animal ecology for several reasons; for instance, they can be used to investigate trophic niches, energy sources (diet tracing) and to track migration patterns. The Neotropics are considered one of the most undersampled regions of the world. Given that Brazil is a continental country where most of the dietary ecology of animal species is under‐assessed, we believe that the SIA‐BRA can provide important complementary information to address this gap in the literature. Additionally, the SIA‐BRA data set allows future investigations to address many questions concerning diet tracing, habitat use, food webs, foraging ecology, physiological aspects and effects of phylogeny on dietary ecology. Main type of variable investigated Carbon and nitrogen stable isotope ratios for terrestrial and aquatic animals. Spatial location and grain The SIA‐BRA included animal tissues sampled in 964 sites in the main Brazilian biomes and coastal marine areas. Time period The data represent information published and/or sampled from 1984 to 2021. Major taxa studied and measurement level The SIA‐BRA contains isotopic data of c. 21,804 non‐captive wildlife specimens, excluding livestock production or laboratory experiments. They were 13,881 vertebrates and 7,923 invertebrates. They were divided into the following habitats: terrestrial (30% of the total), freshwater (27%), oceanic (40%) and estuarine (4%). There were 11 phyla, with a clear dominance of Chordata (64%) and Arthropoda (29%), 36 classes, 154 orders, 473 families, 894 genera and 1,157 species. Software format Data are supplied as a comma‐delimited text file (.csv).

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