Science, Год журнала: 2024, Номер 385(6713), С. 1111 - 1115
Опубликована: Сен. 5, 2024
Cognitive abilities are hypothesized to affect survival and life span in nonhuman animals. However, most tests of this hypothesis have relied on interspecific comparisons indirect measures cognitive ability, such as brain size. We present direct evidence that individual variation is associated with differences a wild food caching bird. measured the spatial tracked 227 mountain chickadees (
Язык: Английский
Процитировано
10Foraging location preferences reflect memory interference associated with spatial learning tasks in a food-caching bird
Animal Behaviour, Год журнала: 2025, Номер 221, С. 123052 - 123052
Опубликована: Фев. 4, 2025
Язык: Английский
Процитировано
0Small scale, elevation- and environmental-related differences in life history strategies in a temperate resident songbird
Royal Society Open Science, Год журнала: 2025, Номер 12(4)
Опубликована: Апрель 1, 2025
Environmental drivers of within-population reproductive patterns are often hypothesized to lead strategies tuned local conditions. Organisms adjust energy allocation between survival and reproduction based on experience, age, lifespan resource availability. Variation in these energetic investments can be described as different demographic tactics which expected optimize the fitness populations. These ideas largely supported by both empirical model-based studies but research identifying specific their corresponding environmental within wild populations remains rare. Using 12 years data, we investigated investment a relatively short-lived resident songbird, mountain chickadee ( Poecile gambeli ), at two elevations that differ harshness North American Sierra Nevada mountains. Challenging winter environments high impose strong selection pressure survival-related traits (e.g. specialized spatial cognition associated with food caching) significantly shorten length window. Here, show chickadees higher elevation lay smaller clutches ca 0.41 fewer eggs) produce 0.25 nestlings) larger offspring 0.4 g heavier) compared lower residents. Due harsher less predictable conditions elevations, this strategy species likely leads production greater chances survival. Overall, our results within-species differences life history may evolve over small scale along gradients.
Язык: Английский
Процитировано
0A long‐term study on the impact of climatic variables on two common nest‐dwelling ectoparasites of the Eurasian blue tit (Cyanistes caeruleus)
Integrative Zoology, Год журнала: 2024, Номер unknown
Опубликована: Май 9, 2024
Abstract We explored the potential influence of temperature and precipitation on abundance two nest‐dwelling ectoparasites (blowflies mites) Eurasian blue tits ( Cyanistes caeruleus ) during a period 21 years compared results with those shorter period. The blowflies was negatively related to precipitation, which could prevent flies from locating their host, laying date. In addition, were positively brood size (more food implies more parasites) interaction between temperature. highest abundances blowfly pupae attained in conditions increasing decreasing temperature, should be common at beginning bird breeding season. Mites significantly date average but only for larger dataset. Higher mites intermediate values precipitations, that are found end These imply optimal both parasites differ, preferring earlier breeders colder humid than mites. Thus, effects climatic studied parasite non‐monotonic can vary species. Finally, fact decreases across study is probably due advancement tit because we calculated variables birds’ reproduction. This nesting does not affect abundance.
Язык: Английский
Процитировано
1Relative breeding timing and reproductive success of a resident montane bird species
Royal Society Open Science, Год журнала: 2024, Номер 11(7)
Опубликована: Июль 1, 2024
Wild populations appear to synchronize their reproductive phenology based on numerous environmental and ecological factors; yet, there is still individual variation in the timing of reproduction within such may be associated with fitness consequences. For example, many studies have documented a seasonal decline fitness, but breeding varying consequences across different environments. Using 11 years data, we investigated relationship between relative success resident mountain chickadees (
Язык: Английский
Процитировано
1Spatial asymmetry of temporal ecological processes can shift in riverine macroinvertebrates responding to fluctuating climate conditions
The Science of The Total Environment, Год журнала: 2024, Номер 952, С. 175872 - 175872
Опубликована: Авг. 30, 2024
Язык: Английский
Процитировано
1Spatial Heterogeneity of Climate Fluctuations Shapes Ecological Processes and Community Dynamics in Riverine Invertebrates Across a Landscape
bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown
Опубликована: Сен. 2, 2024
Abstract The environment and its variability exhibit spatial heterogeneity in influencing ecological processes community dynamics across landscapes. However, the mechanisms remain unexplored. This study investigates relative significance of temporal that shape invertebrate 15 rivers European Iberian Peninsula over 21 years. Spatial asymmetry was driven by a combination deterministic stochastic (i.e., environmental filtering distance within same locations, respectively). It is noteworthy importance versus diminishes with increasing elevation. analysis diverse landscapes offers foundation for anticipating mitigating consequences prospective transformation on biodiversity, thereby directing efficacious conservation strategies.
Язык: Английский
Процитировано
1Feather growth rate and hormone deposition vary with elevation but not reproductive costs in resident Mountain Chickadees
Ornithology, Год журнала: 2024, Номер 141(3)
Опубликована: Март 8, 2024
ABSTRACT Many organisms engage in metabolic tradeoffs to manage costs associated with reproductive output which often leads these carrying over into the future. Compensatory mechanisms vary across life history strategies and are expected result near-optimal fitness gains for investor. Here we investigated whether environmental differences increasing montane elevation variation of a resident passerine songbird, Mountain Chickadee (Poecile gambeli), were related physiological conditions during annual molt. Higher elevations harsher winter, results later shorter breeding seasons than at lower elevations. We sampled outermost tail feathers from adult birds fall after their prebasic molt, initiates closely reproduction (e.g., parental care has ceased, ~1–3 weeks). measured hormone corticosterone deposited (fCORT) feather growth rates evidence effort predicted be driven by several units timing, clutch brood size, offspring mass). There no relationships between any measure characteristics or years, despite substantial wider population this same time. However, high-elevation site grew significantly faster had higher fCORT deposition compared low-elevation birds. These suggest that although signals rate) may not extend individual favor as required earlier onset winter.
Язык: Английский
Процитировано
0Distribution of euptyctimous mite Phthiracarus longulus (Acari: Oribatida) under future climate change in the Palearctic
Scientific Reports, Год журнала: 2024, Номер 14(1)
Опубликована: Сен. 19, 2024
Язык: Английский
Процитировано
0No evidence of reproductive senescence within the natural lifespan in resident mountain chickadees (Poecile gambeli)
Behavioral Ecology and Sociobiology, Год журнала: 2024, Номер 79(1)
Опубликована: Дек. 27, 2024
Язык: Английский
Процитировано
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