Stable Isotopes Of C And N
Mostrando 1-12 de 43 artigos, teses e dissertações.
-
1. SOIL CHEMICAL CHANGES AND RESEMBLANCES IN A CHRONOSEQUENCE RAINFOREST-SUGARCANE-PASTURELAND IN THE ATLANTIC FOREST BIOME
ABSTRACT This study evaluated soil chemical and isotopic changes in soils of a chronosequence rainforest-sugarcane-pasture in the Atlantic Forest biome, Brazil. Soil samples were collected (0-20 cm) in areas of native Brazilian Atlantic rainforest, sugarcane plantation and pastures of Brachiaria decumbens. The soil analyses performed were: pH (water 1:2.5),
CERNE. Publicado em: 2020-12
-
2. Impactos da mudança de vegetação local no aporte de matéria orgânica para um estuário tropical preservado (Estuário do Rio Itapicuru – BA)
Estuaries are major areas of organic matter (OM) deposition, playing an important role in the global carbon cycle. The Itapicuru's river estuary (IRE) is in the North Coast of Bahia (Brazil), in na Environmental Protected Area. Although it presents preserved conditions, some environmental changes caused by human activities can be observed. This study evaluat
Quím. Nova. Publicado em: 15/08/2019
-
3. Trophic ecology of citrus pests based on stable isotope analysis
ABSTRACT: Macrodactylus pumilio Burm. (Coleoptera: Scarabeidae) and Naupactus cervinus (Boh.) (Coleoptera: Curculionidae) are considered primary pests in citrus crops in Brazil, causing damage to plants and decreasing productivity. However, few studies investigate the ecology of these insects. In this context, the use of stable isotopes analysis (SIA) emerge
Sci. agric. (Piracicaba, Braz.). Publicado em: 2018-12
-
4. The trophic niche of Mesoclemmys vanderhaegei (Testudines: Chelidae): evidence from stable isotopes
ABSTRACT Ecological niche is the multidimensional space comprising the resources used by an organism. Intraspecific variation in resource exploitation is common in reptile populations to maximize coexistence of individuals. The use of stable isotope analysis is an effective tool when there are variations in resource exploitation, since it can provide quantit
Zoologia (Curitiba). Publicado em: 23/10/2017
-
5. Histosols in an Upper Montane Environment in the Itatiaia Plateau
ABSTRACT: Highland environments favor accumulation and preservation of soil organic matter (SOM) due to low temperatures, leading to the formation of Histosols. The Itatiaia National Park (INP), Rio de Janeiro, Brazil, offers conditions for preservation of SOM deposited over time, which has led to the formation of these soils. The objective of this study was
Rev. Bras. Ciênc. Solo. Publicado em: 15/12/2016
-
6. Isotopic variation among Amazonian floodplain woody plants and implications for food-web research
Isotopic variation within food sources adds uncertainty to models intended to reconstruct trophic pathways. Understanding this variation is pivotal for planning sampling protocols for food-web research. This study investigates natural variation in C and N stable isotopes among plant species in two western Amazon flooded forests with contrasting watershed bio
Biota Neotrop.. Publicado em: 14/06/2016
-
7. Use of carbon and nitrogen stable isotopes to study the feeding ecology of small coastal cetacean populations in southern Brazil
Amostras de tecido de indivíduos pertencentes às populações de Sotalia guianensis (boto-cinza) e Pontoporia blainvillei (toninha) que vivem no estuário da Baía da Babitonga (26° 28′ S/48° 50′ W) e de uma segunda população de P. blainvillei da área costeira (26° 38′ S/48° 41′ W) foram coletadas entre os anos 2000 e 2006 para determinar as
Biota Neotrop.. Publicado em: 2013-12
-
8. Traceability of animal meals in Japanese quail eggs using the technique of 13C e 15N* stable isotopes
The objective of this study was to trace the inclusion of bovine meat and bone meal (BMBM) in the diet of Japanese quails by analyzing eggs and egg fractions (yolk and albumen) by the technique of carbon-13 (13C) and nitrogen-15 (15N) stable isotopes. In the trial, 120 Japanese quails were distributed in six treatments with four replicates of five birds each
Rev. Bras. Cienc. Avic.. Publicado em: 2013-03
-
9. Mercury and stable isotopes (δ15N and δ13C) as tracers during the ontogeny of Trichiurus lepturus
Este estudo utilizou a concentração de mercúrio total (THg) e a assinatura isotópica (δ15N e δ13C) para avaliar a posição trófica e a área de alimentação de Trichiurus lepturus durante sua ontogenia no norte do Rio de Janeiro, sudeste do Brasil. A posição trófica de T. lepturus foi bem detectada pelo THg e δ15N com os espécimes sub-adultos p
Neotrop. ichthyol.. Publicado em: 2013-03
-
10. Performance and isotopic composition of 13C and 15N in muscle tissue of Nile tilapia (Oreochromis niloticus) fed with different protein / Desempenho produtivo e composição isotópica de 13C e 15N no tecido muscular de tilápia do Nilo (Oreochromis niloticus) alimentada com diferentes fontes protéicas
Alternative sources of food have been studied in substitution for fishmeal in aquaculture, and it may result in a difference in incorporation of carbon and nitrogen, depending on the nutritional value and availability of the source. Two experiments were designed to quantify the participation of different protein sources in the muscle tissue in juvenile and p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/06/2012
-
11. Adaptation of the C4 grass Panicum maximum to defoliation is related to plasticity of N uptake, mobilisation and allocation patterns
Dry mass production and persistence of Panicum maximum pastures depends on nitrogen supply. Defoliation influences N uptake and allocation patterns yet its effects on plasticity of N dynamics in P. maximum have not been investigated. Stable isotopes of N (15N) were used in order to test the hypothesis that defoliation in terms of proportion of the leaf area
Sci. agric. (Piracicaba, Braz.). Publicado em: 2012-10
-
12. Fontes de carbono e nitrogênio para consumidores aquáticos nas microbacias da Mata Atlântica utilizando-se isótopos estáveis / Carbon and nitrogen sources to aquatic consumers in watersheds of the Atlantic forest using stable isotopes.
Isótopos estáveis de 13C e 15N de fontes basais e consumidores foram utilizados para descrever e quantificar as fontes de matéria orgânica que sustentam as teias alimentares em riachos da Floresta Atlântica em um gradiente altitudinal (Floresta Montana, Submontana e Terras Baixas) e em riachos com diferentes usos do solo floresta, cultivo de eucalipto e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011