Results 91 to 100 of about 69,295 (229)

Canalized to heat, plastic to cold: adaptive coordination of leaf and seed strategies in populations spanning an elevational gradient

New Phytologist, EarlyView.
Summary In tropical mountains, surviving temperature extremes demands finely tuned strategies. We investigated how populations of the bromeliad Pitcairnia flammea across a 2200 m elevational gradient balance genetic canalization and plasticity, and whether thermal strategies are coordinated between seeds and leaves.
Cleber J. N. Chaves, Danilo U. Tavares, Isabella V. Lemos‐Silva, João P. S. P. Bento, Henrique Vilela‐Bianchini, Paulo Aecyo, Tami C. Cacossi, Marília M. Tavares, Gabriel P. Sabino, Vitor de A. Kamimura, Wagner L. dos Santos, Lucas N. Gonçalves, Karina T. Silva, Juliana L. S. Mayer, Rafael V. Ribeiro, Diego Escobar‐Escobar, Kenneth J. Feeley, Clarisse Palma‐Silva   +17 more
wiley   +1 more source

Why do models overestimate surface ozone in the Southeast United States [PDF]

, 2016
Ozone pollution in the Southeast US involves complex chemistry driven by emissions of anthropogenic nitrogen oxide radicals (NOx  ≡  NO + NO2) and biogenic isoprene. Model estimates of surface ozone concentrations tend to be biased high in the region and
Cohen, Ronald C., Crounse, John D., Dibb, Jack E., Fisher, Jenny A., Hall, Samuel R., Jacob, Daniel J., Kim, Patrick S., Laughner, Joshua L., Marais, Eloise A., Miller, Christopher C., St. Clair, Jason M., Sulprizio, Melissa P., Thompson, Anne M., Travis, Katherine R., Ullmann, Kirk, Wennberg, Paul O., Wolfe, Glenn M., Yantosca, Robert M., Yu, Karen, Zhu, Lei   +19 more
core   +1 more source

Growth and reworking of freshwater microbially‐mediated carbonates in wind‐stressed lake margins (Lago Sarmiento, Southern Patagonia)

Sedimentology, EarlyView.
ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada, Mauricio Calderón, Anelize Bahniuk, Carolina Henríquez, Tatiana Stepanenko, José Pérez‐Donoso, Nicolás Bruna, Larissa Santos, Guilherme Fedalto, Luis Mancini, Leonardo Fadel Cury   +10 more
wiley   +1 more source

The Feasibility of Counting Songbirds Using Unmanned Aerial Vehicles

, 2017
Obtaining unbiased survey data for vocal bird species is inherently challenging due to observer biases, habitat coverage biases, and logistical constraints.
Barr, Janine M., Wilson, Andrew M., Zagorski, Megan E.   +2 more
core   +1 more source

First record of dot-winged crake, Porzana spiloptera, durnford, 1877 (Rallidae) for the central Andes in Argentina [PDF]

, 2017
Porzana spiloptera, the Dot-wing Crake, has a patchy distribution in southern South America and has previously been considered as inhabiting exclusively lowland wetlands.
Cuervo Bustamante, Pablo Fernando, Llambías, Paulo E., Zarco, Agustín   +2 more
core   +1 more source

Padrões fitogeográficos em Bromeliaceae dos campos de altitude da floresta pluvial tropical costeira do Brasil, no Estado do Rio de Janeiro

Rodriguésia
Resumo Este trabalho relaciona as espécies e variedades de Bromeliaceae ocorrentes nos campos de altitude do Estado do Rio de Janeiro, Brasil. Foram encontrados quatro padrões básicos de distribuição geográfica: 1. Ampla distribuição. 2.
Gustavo Martinelli, Angela Maria Studart da Fonseca Vaz   +1 more
doaj   +1 more source

Questioning Ethnic Fragmentation's Exogeneity - Drivers of Changing Ethnic Boundaries [PDF]

Ethnic fragmentation is a variable increasingly used in the economic literature to explain differences in economic development level, growth or the incidence of conflicts.
Philipp Kolo
core  

Validation of aerial photogrammetry methods to measure body size, condition and mass in small cetaceans

The Journal of Physiology, EarlyView.
Abstract figure legend Unoccupied aerial vehicle (UAV)‐based photogrammetry provides measurements equivalent to traditional hand measurements in bottlenose dolphins. Mass estimates derived from UAV measurements closely match the true body mass of live individuals.
Riccardo Cicciarella, Erik P. Willems, Benjamin Markham, Manuela R. Bizzozzero, Wayne Phillips, Simon J. Allen, Michael Krützen, Fredrik Christiansen   +7 more
wiley   +1 more source

Verbenaceae no Parque Estadual da Serra do Papagaio, Minas Gerais, Brasil

Rodriguésia
Resumo O Parque Estadual da Serra do Papagaio está localizado no sul de Minas Gerais, e faz parte do Complexo da Serra da Mantiqueira, com vegetação representada por campos de altitude, floresta ombrófila densa e floresta ombrófila mista.
Pedro Henrique Cardoso, Andressa Cabral, Fernanda Santos-Silva, Fátima Regina Gonçalves Salimena   +3 more
doaj   +1 more source

DERIVA ZONAL DO PLASMA IONOSFÉRICO NO PERÍODO DE MÍNIMO SOLAR, 2006 A 2010, NA REGIÃO BRASILEIRA DE BAIXA LATITUDE, SÃO JOSÉ DOS CAMPOS-SP, UTILIZANDO EMISSÃO OI 630,0 nm

Revista UniVap, 2013
O trabalho apresenta análises das velocidades de deriva zonal das irregularidades de plasma ionosférico de grande escala; essas irregularidades foram observadas utilizando técnica óptica de emissão OI 630,0 nm, obtida através de fotômetro imageador ...
Flávia Elaine Coelho, José Ricardo Abalde Guede, Paulo Roberto Fagundes, Rodolfo de Jesus, Valdir Gil Pillat   +4 more
doaj   +1 more source