Results 91 to 100 of about 8,422 (237)
Using nitrogen-15 to examine protein sources in hummingbird diets
, 2021 Jessica Hardesty
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Biological Reviews, Volume 101, Issue 1, Page 336-363, February 2026.ABSTRACT The ability of individuals to cope with their environment, and therefore the likelihood that they survive and pass on their genes (i.e. fitness), is largely determined by physiological state. Tracking physiological state in wild animals, however, is challenging.
Paul Jerem, L. Michael Romero
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Clinical findings and normative ocular data for free‐living Anna's (Calypte anna) and Black‐chinned (Archilochus alexandri) Hummingbirds [PDF]
, 2018 Bret A. Moore +6 more
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Territorial Defense against Hummingbirds and Insects by Tropical Hummingbirds
The Condor, 1978 problems of observing them at close range and the variability of their behavior. Territorial hummingbirds are ideally suited for the study of time and energy budgets for the following reasons. (1) Their daily activities are usually quite localized. (2) They are not affected by the presence of a quiet observer and consequently can be observed at close ...
openaire +2 more sources
Biological Reviews, Volume 101, Issue 1, Page 419-436, February 2026.ABSTRACT Humans play key roles in shaping the structure and processes of ecosystems globally, especially in cities. This recognition has prompted a recent focus on understanding urban systems via interactions between human social systems and ecological and evolutionary processes.
Kevin E. McCluney +9 more
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Population Ecology, Volume 68, Issue 1, January 2026.This study assessed the impact of seedling reintroduction and protection on the vulnerable cactus Cephalocereus polylophus using a 5‐year dataset and integral projection models. Results showed that although seedling protection increased survival and population size slightly, the overall growth rate remained below one due to limited recruitment and ...
Gabriel Arroyo‐Cosultchi +3 more
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American Journal of Botany, Volume 113, Issue 1, January 2026.Abstract Premise Evolutionary theory predicts polymorphism should be rare; however, intraspecific variation in floral color is common and can be attributed to genetic drift, plasticity, or variable selection. Examining floral color polymorphism both within contact zones and across a species' range can reveal the mechanisms maintaining this variation ...
Emma Fetterly +6 more
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Pollinator, herbivore, and climatic selective pressures differ across a floral color transition zone
American Journal of Botany, Volume 113, Issue 1, January 2026.Abstract Premise Spatial and temporal variations in climate and ecological interactions may underlie the origin and maintenance of floral color polymorphisms across a species range. Betalains are nitrogen‐containing, phylogenetically restricted pigments that, like the widespread and well‐studied anthocyanins and carotenoids, may attract pollinators ...
Sierra L. Jaeger +5 more
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In-situ cryo-biasing heating TEM sample holder with full-range temperature control from -170°C up to >1000°C [PDF]
BIO Web of ConferencesParkin Calvin +2 more
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Specialized Feeding Behavior of an Endangered Primate Enhances Forest Health in China
Ecology and Evolution, Volume 16, Issue 1, January 2026.The endangered black‐and‐white snub‐nosed monkey (Rhinopithecus bieti) exhibits a specialized diet on the lichen Usnea longissima. We proved that the U. longissima is harmful to trees and the monkey mitigates overgrowth of the lichen, as well as promotes its regeneration to maintain population, thereby promoting ecosystem health and resilience.
Na Li +6 more
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