Results 11 to 20 of about 48,023 (185)

Amphibian loss alters periphyton structure and invertebrate growth in montane streams. [PDF]

J Anim Ecol, 2022
This paper demonstrates that amphibian loss increases periphyton biomass, causes shifts in algal assemblages and reduces invertebrate growth. It highlights the importance of protecting amphibians in order to maintain normal stream ecosystem functioning, especially in nonforested streams where periphyton in the main energy resource.
Alonso A, Monroy S, Bosch J, Pérez J, Boyero L.   +4 more
europepmc   +2 more sources

Prioritizing conservation in sub-Saharan African lakes based on freshwater biodiversity and algal bloom metrics. [PDF]

Conserv Biol, 2022
Abstract As agricultural land use and climate change continue to pose increasing threats to biodiversity in sub‐Saharan Africa, efforts are being made to identify areas where trade‐offs between future agricultural development and terrestrial biodiversity conservation are expected to be greatest. However, little research so far has focused on freshwater 
Danaher C, Newbold T, Cardille J, Chapman ASA.   +3 more
europepmc   +2 more sources

O papel da clorofila na alimentação humana: uma revisão [PDF]

BJPS: Brazilian Journal of Pharmaceutical Sciences, 2003
Os eventuais efeitos biologicos beneficos da clorofila, presente em alimentos, suscitam polemica e duvidas entre os consumidores. As informacoes divulgadas nos meios de comunicacao que atribuem a molecula da clorofila numerosos efeitos terapeuticos, quase miraculosos, se contrapoem a falta de aprovacao dessas atribuicoes pela comunidade cientifica ...
exaly   +4 more sources

Seasonal and intracanopy shifts in the fates of absorbed photons in central Amazonian forests: implications for leaf fluorescence and photosynthesis. [PDF]

New Phytol
Summary Recent studies have shown a linear relationship between solar‐induced Chl fluorescence (SIF) and gross primary productivity (GPP) at large scales. However, this relationship diverges at finer leaf scales, particularly in tropical forests with complex canopy structures.
Ziccardi LG, Kramer D, Gonçalves N, Nelson BW, Taylor T, Albert LP, Campos KS, Prohaska N, Restrepo-Coupe N, Saleska SR, Stark SC.   +10 more
europepmc   +2 more sources

Community-driven variations in snow algae color modulate snow albedo reduction. [PDF]

New Phytol
Summary Snow algae blooms visibly alter snow color and surface energy balance, yet the biological basis of this variability remains unclear. We investigated how pigment composition and community structure shape the optical properties of snow algae blooms of distinct colors – red, orange, and green – co‐occurring within the same snowfield in Glacier ...
Almela P, Elser JJ, Zmuda A, Niehaus T, Hamilton TL.   +4 more
europepmc   +2 more sources

Wound Healing and Anti-Inflammatory Effect in Animal Models of Calendula officinalis L. Growing in Brazil. [PDF]

Evid Based Complement Alternat Med, 2012
Calendula officinalis is an annual herb from Mediterranean origin which is popularly used in wound healing and as an anti‐inflammatory agent. In this study, the ethanolic extract, the dichloromethane, and hexanic fractions of the flowers from plants growing in Brazil were produced.
Parente LM, Lino Júnior Rde S, Tresvenzol LM, Vinaud MC, de Paula JR, Paulo NM.   +5 more
europepmc   +2 more sources

Environmental and human factors shape the trophic ecology of a widespread marine predator. [PDF]

J Anim Ecol
Our study reveals how environmental factors and fishing pressure influence swordfish diet, highlighting trophic shifts under future climate scenarios. We provide a novel framework to strengthen our ability to plan for and manage the redistribution of species under global change ensuring that the energetic needs of predators are met.
Fernández-Corredor E, Fuster-Alonso A, Ramírez F, Giménez J, García-Barcelona S, Macías D, Coll M, Navarro J.   +7 more
europepmc   +2 more sources

ÍNDICE SPAD COMO ESTIMATIVA INDIRETA DO CONTEÚDO DE CLOROFILA EM PLANTAS DE QUIABO

Revista de Agricultura Neotropical, 2022
A clorofila, molécula responsável pela atividade fotossintética das plantas, pode ser quantificada por métodos diretos e indiretos. O objetivo do estudo foi relacionar os resultados do conteúdo de clorofila obtidos por diferentes métodos de determinação
Vinicius Villa e Vila, Gustavo Soares Wenneck , Daniele de Souza Terassi, Roberto Rezende, Reni Saath   +4 more
doaj   +1 more source

Diagnóstico do estado nutricional de N em porta-enxertos de citros, utilizando-se de teores foliares de clorofila [PDF]

Revista Brasileira de Fruticultura, 2002
Objetivou-se, neste trabalho, avaliar os teores foliares de clorofila total (a+b) em porta-enxertos de citros cultivados em tubetes, como índices no diagnóstico do estado nutricional de N, de acordo com adição das doses de N (0; 400; 800; 1.600; 3.200 e ...
ANTÔNIO DECARLOS NETO, DALMO LOPES DE SIQUEIRA, PAULO ROBERTO GOMES PEREIRA, VICTOR HUGO ALVAREZ V.   +3 more
doaj   +1 more source

As clorofilas [PDF]

Ciência Rural, 2005
As clorofilas são pigmentos verdes, comuns em todas as células fotossintéticas. Por sua estrutura química ser instável, são facilmente degradadas, resultando em produtos de decomposição que modificam a percepção e qualidade dos alimentos. Esta revisão trata dos vários fatores que interferem na degradação das clorofilas, como a luz, radiação, calor ...
Streit, Nivia Maria, Canterle, Liana Pedrolo, Canto, Marta Weber do, Hecktheuer, Luísa Helena Hychecki   +3 more
openaire   +4 more sources