Results 31 to 40 of about 136,690 (209)

Arboreal twig-nesting ants form dominance hierarchies over nesting resources. [PDF]

open access: yes, 2019
Interspecific dominance hierarchies have been widely reported across animal systems. High-ranking species are expected to monopolize more resources than low-ranking species via resource monopolization. In some ant species, dominance hierarchies have been
Philpott, Stacy M, Yitbarek, Senay
core   +2 more sources

Variation in root morphology of epiphytic orchids along small-scale and large-scale moisture gradients [PDF]

open access: yesActa Botânica Brasílica
Root morphology is expected to respond to environmental conditions. Two earlier studies reported predictable changes in the structure of the velamen radicum (common in monocotyledons) along rainfall gradients, which was expected from its assumed role in ...
Helena J. R. Einzmann   +2 more
doaj   +2 more sources

Grasses and the resource availability hypothesis: the importance of silica-based defences [PDF]

open access: yes, 2007
The resource availability hypothesis (RAH) predicts that allocation of resources to anti-herbivore defences differs between species according to their growth rate.
Ennos, Roland A.   +2 more
core   +2 more sources

Wing Shape in the Taxonomic Identification of Genera and Species of the Subfamily Dolichopodinae (Dolichopodidae, Diptera) [PDF]

open access: yesMongolian Journal of Biological Sciences, 2019
Characters of the wing morphology have significant importance in the systematics and taxonomy of the family Dolichopodidae, but there are only a few studies concerning the variation in wing shape of dolichopodid flies.
Mariya A. Chursina
doaj   +1 more source

Phytoplankton niche generation by interspecific stoichiometric variation [PDF]

open access: yesGlobal Biogeochemical Cycles, 2012
For marine biogeochemical models used in simulations of climate change scenarios, the ability to account for adaptability of marine ecosystems to environmental change becomes a concern. The potential for adaptation is expected to be larger for a diverse ecosystem compared to a monoculture of a single type of (model) algae, such as typically included in
Göthlich, Lena, Oschlies, Andreas
openaire   +2 more sources

Differences in wings may be sufficient to separate the sexes and two species of Gynaikothrips Zimmermann (Thysanoptera: Phlaeothripidae)?

open access: yesEntomoBrasilis, 2022
In this study, we use geometric morphometry to discriminate thrips of the species Gynaikothrips uzeli (Zimmerman) and Gynaikothrips ficorum (Marchal) and also to detect sexual dimorphism in these species. Two hundred individuals, one hundred females and
Priscila Paredes dos Santos   +2 more
doaj   +1 more source

A unifying explanation for variation in ozone sensitivity among woody plants [PDF]

open access: yes, 2017
Tropospheric ozone is considered the most detrimental air pollutant for vegetation at the global scale, with negative consequences for both provisioning and climate regulating ecosystem services. In spite of recent developments in ozone exposure metrics,
Ainsworth   +28 more
core   +1 more source

Lujiatun Psittacosaurids: understanding individual and taphonomic variation using 3D geometric morphometrics. [PDF]

open access: yesPLoS ONE, 2013
Psittacosaurus is one of the most abundant and speciose genera in the Dinosauria, with fifteen named species. The genus is geographically and temporally widespread with large sample sizes of several of the nominal species allowing detailed analysis of ...
Brandon P Hedrick, Peter Dodson
doaj   +1 more source

On Intraspecific and Interspecific Variation in Teleost Scleral Ossification [PDF]

open access: yesThe Anatomical Record, 2019
ABSTRACTScleral ossicles are bony elements found along the eyes of many fishes, amphibians, and reptiles. These bones provide a superficial layer of support to the eye and may facilitate visual acuity. Previous research has shown that scleral ossicle diversity is generally limited among teleosts, but that scleral ossicles have been lost numerous times ...
Gabriel H. Kindl, Kelly E. O'Quin
openaire   +2 more sources

Interspecific somatic hybrids between Solanum bulbocastanum and S. tuberosum and their haploidization for potato breeding. [PDF]

open access: yes, 2012
Protoplast fusion between incongruent Solanum bulbocastanum and S. tuberosum haploids was accomplished to produce hybrids combining elite traits from both parents. We identified 11 somatic hybrids out of 42 regenerants analyzed through ISSR markers. Some
AVERSANO, RICCARDO   +7 more
core   +2 more sources

Home - About - Disclaimer - Privacy