Results 11 to 20 of about 277 (135)

Variaciones ecomorfológicas de las poblaciones de guanaco de Patagonia (Argentina)

Arqueologia, 2016
Este trabajo estudia los tamaños corporales de las poblaciones modernas de Lama guanicoe de Patagonia continental e insular (Argentina), a partir del análisis osteométrico de cuatro huesos largos delanteros (húmero, radiocúbito, metacarpo y primera ...
G. Lorena L’Heureux, Jimena Cornaglia Fernández   +1 more
doaj   +1 more source

Distribución de plantas nativas y exóticas a lo largo de gradientes de elevación en senderos de montaña en los Andes de Mendoza, Argentina

Boletín de la Sociedad Argentina de Botánica, 2023
Introducción y objetivos: El cambio climático, el ganado y el creciente uso turístico favorecen la dispersión de plantas exóticas, amenazando la conservación de los ecosistemas altoandinos.
María Alisa Alvarez, Lorena de Jesús Bonjour, Agustina Barros, Diego P. Vázquez, Valeria Aschero   +4 more
doaj   +3 more sources

Gradiente florístico das florestas secundárias do Nordeste Paraense Floristic gradient of the northeast Paraense secondary forests

Acta Amazonica, 2010
O presente estudo descreve um gradiente florístico de uma cronosequência de florestas secundárias do Nordeste Paraense, a partir de 19 sítios de diferentes idades, avaliados em diferentes anos.
Shirley Soares Prata, Izildinha de Souza Miranda, Sérgio Augusto Oliveira Alves, Flavia cardoso Farias, Fernando Cristovam da Silva Jardim   +4 more
doaj   +1 more source

From steps to home ranges: How habitat disturbance influences the movement drivers of an arboreal primate

Journal of Animal Ecology, EarlyView.
Challenging the narrative about howler monkeys' high resilience to anthropogenic changes, our multiscale analysis reveals the costs of habitat disturbance to their movement ecology. We identify thermal limitations, reduced travel efficiency, and significant spatial saturation.
Anaid Cárdenas‐Navarrete, Sarie Van Belle, Ulises Lara‐García, Manuel Guzmán‐Aguilar, Onja H. Razafindratsima   +4 more
wiley   +1 more source

Elevation shapes alpine snow algal blooms and their influence on albedo reduction

New Phytologist, EarlyView.
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.
Pablo Almela, Scott Hotaling, J. Joseph Giersch, Helena C. L. Klip, James J. Elser, Trinity L. Hamilton   +5 more
wiley   +1 more source

Diferentes estrategias en las dinámicas de flujo de savia y nicho hidrológico de árboles dominantes en el Desierto Sonorense posibilitan su coexistencia

Botan‪ical Sciences, 2023
Antecedentes: Las plantas en ecosistemas áridos exhiben adaptaciones a las sequías periódicas, más frecuentes e intensas por el cambio global. Conocer los atributos ecofisiológicos en las especies, ayudará a entender sus adaptaciones a las limitaciones ...
Enrique Martínez-Núñez, Alejandro E. Castellanos, Shishir Basant, Christian Ortega, Brad P. Wilcox, Enrico A. Yépez, Julio C. Rodríguez, José R. Romo-León   +7 more
doaj   +1 more source

Tropical Bee Assemblage Diversity Decreases With Elevation While Body Size Increases

Biotropica, Volume 58, Issue 4, July 2026.
Photos of bee specimens collected in the Colombian Andes across a nearly 3000 m elevational cline. They are arranged to illustrate both the decline in richness with elevation and the increase in community average body size with elevation. ABSTRACT Elevation gradients are powerful drivers of changes in species composition, richness, and functional ...
Nash E. Turley, Harold Pulido‐Guarín, Daniel Nossa‐Suárez, Gabriella Hoffmann, Ruben D. Martín‐Rojas, Lucia Aguilar‐Benavides, Margarita M. López‐Uribe   +6 more
wiley   +1 more source

Determinação dos parâmetros fisiológicos e gradiente térmico de diferentes grupos genéticos de caprinos no semi-árido Determination of the physiologic parameters and thermal gradient of different genetic groups of goats from semi-arid region

Ciência e Agrotecnologia, 2005
Objetivou-se com este trabalho avaliar o comportamento fisiológico de diferentes grupos genéticos de caprinos mediante respostas fisiológicas da temperatura retal, freqüência cardíaca e freqüência respiratória, e do gradiente entre temperatura retal e ...
Expedito Danusio de Souza, Bonifácio Benício de Souza, Wandrick Haus de Souza, Marcílio Fontes Cezar, José Romulo Soares dos Santos, Gustavo de Paula Tavares   +5 more
doaj   +1 more source

Environmental Stress Drives Plasticity in Sexual Bimaturism in the Black Soldier Fly (Hermetia illucens Linnaeus, 1758)

Entomologia Experimentalis et Applicata, Volume 174, Issue 7, Page 736-749, July 2026.
We measured the plasticity in sexual bimaturism (SBM; differences between sexes in the timing of sexual maturity) in the black soldier fly (BSF) by exposing larvae to nutrient availability and humidity stress. Our results show that SBM can range between protandry and protogyny depending on the environmental quality. Additionally, we found the degree of
Luis Rodrigo Arce‐Valdés, Hayat Mahdjoub, Jordi Vilanova, Carlos López‐Manzano, Rassim Khelifa   +4 more
wiley   +1 more source

Caracterización limnológica y del zooplancton de lagos andinos en un gradiente altitudinal en Tierra del Fuego, Argentina

Ecología Austral
Durante el período comprendido entre diciembre 2022 y enero 2023 se relevaron 8 lagos en un gradiente altitudinal (294-871 m s. n. m.) de la zona cordillerana de Tierra del Fuego.
Patricia Rodríguez, Laura Wolinski, Soledad Diodato   +2 more
doaj   +1 more source