Results 11 to 20 of about 47,714 (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

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

Respostas de pupunheiras (Bactris gasipaes Kunth) jovens ao alagamento [PDF]

Pesquisa Agropecuária Brasileira, 2002
O objetivo deste trabalho foi estudar os efeitos do encharcamento do solo sobre a condutância estomática, o conteúdo relativo de água, o teor de clorofila e a concentração de N, P, K e de açúcares solúveis nos tecidos das folhas, bulbos e raízes de ...
Cláudio José Reis de Carvalho, Françoise Yoko Ishida   +1 more
doaj   +1 more source

Effects of sucrose and irradiance on germination and early gametophyte growth of the endangered tree fern Dicksonia sellowiana Hook (Dicksoniaceae) Efeito da sacarose e irradiância na germinação e crescimento inicial do gametófito da samambaia arbórea Dicksonia sellowiana Hook (Dicksoniaceae) em perigo de extinção

Acta Botânica Brasílica, 2004
It is an endangered tree fern that grows in mixed umbrophylus forests in the tropics. Sterilized spores were germinated at 25 ± 2ºC under a 16-hour photoperiod, in Dyer and MS medium supplemented with 0 to 5% sucrose.
Gladys Daniela Rogge Renner, Áurea Maria Randi   +1 more
doaj   +1 more source

VARIABILIDAD INTERANUAL DE CLOROFILA EN EL GOLFO DE CALIFORNIA

Ecología Aplicada, 2007
El Golfo de California es caracterizado como un mar semicerrado y una cuenca de evaporacion. Se ha divido en varias zonas fisicas y biogeograficas, caracteristicas dadas por la dinamica de cada zona. El objetivo de este trabajo fue el de conocer la variabilidad interanual de la clorofila de Septiembre de 1997 a Diciembre de 2002 bajo condiciones El ...
T. Leticia Espinosa-Carreón, J. Eduardo Valdez-Holguín   +1 more
openaire   +4 more sources

1997-98 El Niño effects on the pelagic ecosystem of the California current off Baja California, Mexico

Geofísica Internacional, 2003
Analizamos la respuesta del plancton a El Niño 1997-98 en la región sureña (26-32°N) de la Corriente de California, a partir de cuatro cruceros IMECOCAL. La clorofila a integrada en la vertical presentó un incremento moderado hacia el final del ENSO.
Bertha E. Lavaniegos, Gilberto Gaxiola-Castro, Luis C. Jiménez-Pérez, María R. González-Esparza, Timothy Baumgartner, Joaquín García-Cordova   +5 more
doaj   +1 more source

Espaçamento, densidade populacional e adubação nitrogenada na cultura do milho Row spacing, population density and nitrogen fertilization in maize

Revista Brasileira de Ciência do Solo, 2005
A distribuição espacial de plantas por área é um recurso para aumentar a produtividade. Para materiais de alta produtividade, são necessárias mais informações quanto à resposta à adubação nitrogenada. Assim, avaliou-se na cultura do milho a influência do
José Pedro Ribeiro do Amaral Filho, D. Fornasieri Filho, Rogerio Farinelli, José Carlos Barbosa   +3 more
doaj   +1 more source