Results 11 to 20 of about 114,626,885 (167)

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

Elevation shapes alpine snow algal blooms and their influence on albedo reduction. [PDF]

New Phytol
Graphical summary of elevational trends in Sanguina‐dominated snow algal blooms. Increasing elevation was associated with larger cells, lower Chla content per cell, higher astaxanthin ratios, lower snow water content, and reduced cell‐normalized albedo, whereas algal cell density showed no consistent elevational trend.
Almela P, Hotaling S, Giersch JJ, Klip HCL, Elser JJ, Hamilton TL.   +5 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

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

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 ...
Dalmo Lopes de Siqueira, Dalmo Lopes De Siqueira, Víctor Hugo V Alvarez   +2 more
exaly   +3 more sources

Efeitos da calagem, cobalto e molibdênio sobre a concentração de clorofila nas folhas de amendoim [PDF]

Revista Brasileira de Ciência do Solo, 1999
Para avaliar os efeitos da calagem e da aplicação de cobalto e molibdênio nas sementes sobre a concentração de clorofila em folhas de plantas de amendoim, foram instalados experimentos, no período "das águas", nos anos agrícolas 1990/91 e 1991/92, em ...
E. F. Caires, C. A. Rosolem
doaj   +2 more sources

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

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
core   +4 more sources