Results 1 to 10 of about 47,156 (163)

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

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

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

Teor de nitrogênio, clorofila e relação clorofila-carotenoide em café arábica em solo submetido a diferentes corretivos de acidez

Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences, 2013
Resumen pt: Alguns residuos industriais possuem potencial de utilizacao para a correcao da acidez do solo, como a escoria e o oxido de magnesio; no entanto, os proce...
N.O. Nogueira, L.D. Martins, M.A. Tomaz, F.V. Andrade, R.R. Passos   +4 more
openaire   +1 more source

Revisión y optimización metodológica para extraer clorofila-a fitoplanctónica en ambientes acuáticos

Ecología Austral, 2022
La cuantificación de la concentración de clorofila-a fitoplanctónica (Chl-a) es una determinación de rutina en estudios limnológicos, ecológicos y ambientales. En este trabajo se realizó un relevamiento bibliográfico acerca de los métodos utilizados con mayor frecuencia en la actualidad para determinar Chl-a, con el objetivo de encontrar el método más ...
Bursztyn Fuentes, Amalia Lara, Granitto, María, Maluendez Testoni, Maria Constanza, Castro, María Victoria, Rodriguez, Patricia Laura   +4 more
openaire   +3 more sources

Metabolitos secundarios y clorofilas en cempasúchil en respuesta a estrés salino

Revista Mexicana de Ciencias Agrícolas, 2018
Factores de estrés bióticos y abióticos tienen inf luencia en la biosíntesis de metabolitos secundarios en algunas especies medicinales. En este sentido, se ha reportado que el estrés salino altera las propiedades bioquímicas de un gran número de cultivos.
Ma. Guadalupe Peralta-Sánchez, Libia Iris Trejo-Téllez, Fernando Carlos Gómez-Merino, Ma. de las Nieves Rodríguez-Mendoza, Miguel Ángel Serrato-Cruz, J. Cruz García-Albarado   +5 more
openaire   +2 more sources

Producción de pigmentos naturales (clorofila-a) en biorrefinerias agroindustriales

Ciencia y Tecnología, 2016
El objetivo del trabajo fue evaluar la producción de clorofila-a por Aphanothece microscópica Nägeli a partir de efluentes de procesamiento de productos lácteos dentro del ámbito de una biorrefinería. Los experimentos se realizaron en biorreactores mediante cultivo heterotrófico en condiciones de pH 7.60, temperatura de 20º C y aireación continua de 1 ...
María Queiroz, Luis Guillermo Ramírez Mérida, Leila Queiroz Zepka, Eduardo Jacob-Lopes, Nivia Streit   +4 more
openaire   +2 more sources

Atividade da redutase do nitrato e fluorescência da clorofila a em mamoeiro [PDF]

Revista Brasileira de Fruticultura, 2008
O objetivo do presente trabalho foi correlacionar a atividade da redutase do nitrato e a eficiência fotoquímica máxima do fotossistema II (FSII), expressa pela razão F V/F M (F V = fluorescência variável e F M = fluorescência máxima), em mamoeiro (Carica papaya L.) cv. Tainung 01 e Sunrise Solo 72/12 em condições de campo.
Fontes, Renata Venturim, Santos, Mirella Pupo, Falqueto, Antelmo Ralph, Silva, Diolina Moura   +3 more
openaire   +3 more sources