Results 101 to 110 of about 13,507 (234)

Bioclimatic, demographic and anthropogenic correlates of grizzly bear activity patterns in the Greater Yellowstone Ecosystem

Oikos, EarlyView.
Plasticity of diel activity rhythms may be a key element for adaptations of wildlife populations to changing environmental conditions. In the last decades, grizzly bears Ursus arctos in the Greater Yellowstone Ecosystem (GYE) have experienced notable environmental fluctuations, including changes in availability of food sources and severe droughts ...
Aurora Donatelli, Mark A. Haroldson, Justin G. Clapp, Paolo Ciucci, Frank T. van Manen   +4 more
wiley   +1 more source

On the spatial clustering of behavioural phenotypes: matching movement tactics with landscape structure in a large herbivore

Oikos, EarlyView.
In the wild, individuals consistently differ in movement and space use behaviours, depending on their personality. This variation can lead to personality–habitat associations and spatial structuring, potentially generating individual niche segregation.
Inès Khazar, Nadège C. Bonnot, A. J. Mark Hewison, Nathan Ranc, Arnaud Bonnet, Yannick Chaval, Bruno Lourtet, Nicolas Morellet   +7 more
wiley   +1 more source

Effects of intraspecific competition and body mass on diet specialization in a mammalian scavenger. [PDF]

Ecol Evol, 2022
Lewis AC, Hughes C, Rogers TL.
europepmc   +1 more source

Temporal changes in the dietary niche of sympatric seals provides insight into the role of competition in population declines

Oikos, EarlyView.
Competition theory suggests that interspecific prey competition can result in changes to the dietary niche, but obtaining timeseries of data from sympatric species experiencing temporal variation in competition is challenging. Scotland is an important area for two species of seals, but over the past 20 years, populations of harbour seals Phoca vitulina
Izzy Langley, Philip S. Hammond, Paul M. Thompson, Graham J. Pierce, Lindsay J. Wilson, Ailsa J. Hall, Gordon D. Hastie, Debbie J. F. Russell   +7 more
wiley   +1 more source

On the capacity for rapid adaptation and plastic responses to herbivory and intraspecific competition in insular populations of Plectritis congesta. [PDF]

Evol Appl, 2022
Skaien CL, Arcese P.
europepmc   +1 more source

Species identity and spatial scale drive context‑dependent tree diversity effects in a Finnish forest experiment

Oikos, EarlyView.
Tree species diversity is known to affect tree growth and leaf traits, which in turn can influence various ecosystem processes. However, the reported direction of these tree diversity effects is inconsistent, indicating that their outcomes depend strongly on ecological context.
Juri A. Felix, Philip C. Stevenson, Julia Koricheva   +2 more
wiley   +1 more source

Individual variation in perceived density of conspecifics and its impacts on the realization of ecological niches

Oikos, EarlyView.
Animals gather information about their surroundings, including their social environment, using a wide range of sensory modalities. Variation in reception, processing and interpretation of information (cues or signals) can lead to differences in how individuals perceive their local environment. Yet, how individual differences in environmental perception
Ane Liv Berthelsen, Barbara A. Caspers, Nayden Chakarov, Alexandra K. Childs, Angelica Coculla, Melanie Dammhahn, Maria Moiron, Max Mühlenhaupt, Caroline Müller, Jules Petit, Tim M. Rapp, Nora K. E. Schulz, Svenja Stoehr, David L. J. Vendrami   +13 more
wiley   +1 more source

The niche variation hypothesis predicts hunting returns across human cultures

Oikos, EarlyView.
The niche variation hypothesis (NVH) proposes that a broader population niche arises from greater individual specialization. Despite decades of empirical testing, research remains constrained to non‐human foragers, and the generality of NVH may extend beyond wildlife. The analysis of > 8000 hunting records from 12 human societies across four continents
Raul Costa‐Pereira
wiley   +1 more source

Seeding year alfalfa population development as influenced by weed competition and density of establishment

Agricultural and Food Science, 1980
The research in intraspecific competition within an alfalfa stand and interspecific competition between alfalfa and weeds was begun on the Michigan State University farm in East Lansing in 1972.
Seppo Pulli
doaj  

Compromised compensation: evaluating the fitness costs of tolerance responses in plants facing herbivore-induced delayed germination and intraspecific competition

Journal of Ecology and Environment
Background: Many plants compensate for the damage caused by herbivorous insects through tolerance responses. Besides directly causing plant tissue loss and seed production reduction, herbivory causes phenological changes in the host plant.
Jeong-Min Kim, Min-Soo Choi, Juhee Lee, Yong-Chan Cho, Youngsung Joo   +4 more
doaj   +1 more source