Results 41 to 50 of about 2,420,021 (302)

Niche models at inter- and intraspecific levels reveal hierarchical niche differentiation in midwife toads [PDF]

open access: yesScientific Reports, 2020
AbstractVariation and population structure play key roles in the speciation process, but adaptive intraspecific genetic variation is commonly ignored when forecasting species niches. Amphibians serve as excellent models for testing how climate and local adaptations shape species distributions due to physiological and dispersal constraints and long ...
Eduardo José Rodríguez-Rodríguez   +6 more
openaire   +7 more sources

Morphological similarity and ecological overlap in two rotifer species. [PDF]

open access: yesPLoS ONE, 2013
Co-occurrence of cryptic species raises theoretically relevant questions regarding their coexistence and ecological similarity. Given their great morphological similitude and close phylogenetic relationship (i.e., niche retention), these species will ...
Carmen Gabaldón   +3 more
doaj   +1 more source

Modulation of occluding junctions alters the hematopoietic niche to trigger immune activation

open access: yeseLife, 2017
Stem cells are regulated by signals from their microenvironment, or niche. During Drosophila hematopoiesis, a niche regulates prohemocytes to control hemocyte production.
Rohan J Khadilkar   +3 more
doaj   +1 more source

Coordinated regulation of niche and stem cell precursors by hormonal signaling. [PDF]

open access: yesPLoS Biology, 2011
Stem cells and their niches constitute units that act cooperatively to achieve adult body homeostasis. How such units form and whether stem cell and niche precursors might be coordinated already during organogenesis are unknown.
Dana Gancz, Tamar Lengil, Lilach Gilboa
doaj   +1 more source

Competition and Niche Differentiation of Water and Nutrients between Broussonetia papyrifera and Platycladus orientalis under Prolonged Drought Stress

open access: yesAgronomy, 2022
Little is known about the competition between and niche differentiation of water and nutrients between angiosperm and gymnosperm tree species under prolonged drought stress, especially in fragile environments.
Kai Yao, Yanqing Wang, Yanyou Wu
doaj   +1 more source

Seasonal modifications of longitudinal distribution patterns within a stream: Interspecific interactions in the niche overlap zones of two Ephemera mayflies

open access: yesEcology and Evolution, 2022
Niche differentiation between closely related species leads to differentiation of their habitats. Segregation based on slight differences in environmental factors, that is niche differentiation on the microhabitat scale, allows more species to inhabit a ...
Seiya Okamoto   +2 more
doaj   +1 more source

Niche characteristics of lichen in Dabancheng mountainous area, Urumqi

open access: yesGuangxi Zhiwu, 2023
In order to reveal the status of habitat resource utilization and the degree of competition among lichens in Dabancheng mountainous areas. In this work, 30 plots were sampled in the field and the species cover data of the plots were investigated, and the
Zuosen LI, Anwar TUMUR
doaj   +1 more source

New theoretical and analytical framework for quantifying and classifying ecological niche differentiation

open access: yesEcological Monographs
Ecological niche differentiation is a process that accompanies lineage diversification and community assembly. Traditionally, the degree of niche differentiation is estimated by contrasting niche hypervolumes of two taxa, reconstructed using ecologically
Alfredo Ascanio   +3 more
semanticscholar   +1 more source

Nitrous oxide production by ammonia oxidizers: Physiological diversity, niche differentiation and potential mitigation strategies

open access: yesGlobal Change Biology, 2019
Oxidation of ammonia to nitrite by bacteria and archaea is responsible for global emissions of nitrous oxide directly and indirectly through provision of nitrite and, after further oxidation, nitrate to denitrifiers. Their contributions to increasing N2O
J. Prosser   +3 more
semanticscholar   +1 more source

Macrophages Contribute to the Spermatogonial Niche in the Adult Testis

open access: yesCell Reports, 2015
The testis produces sperm throughout the male reproductive lifespan by balancing self-renewal and differentiation of spermatogonial stem cells (SSCs).
Tony DeFalco   +5 more
doaj   +1 more source

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