Results 11 to 20 of about 418,792 (249)

A null model for Dunbar’s circles [PDF]

open access: yesPhysica A: Statistical Mechanics and its Applications, 2020
7 pages, 2 figures, 1 ...
Jiménez-Martín, Manuel   +3 more
openaire   +2 more sources

Using coverage‐based rarefaction to infer non‐random species distributions

open access: yesEcosphere, 2021
Understanding how species are non‐randomly distributed in space and how the resulting spatial structure responds to ecological, biogeographic, and anthropogenic drivers is a critical piece of the biodiversity puzzle.
Thore Engel   +6 more
doaj   +1 more source

A null model for microbial diversification [PDF]

open access: yesProceedings of the National Academy of Sciences, 2017
Significance When evolutionary histories of closely related microorganisms are reconstructed, the lineages often cluster into visibly recognizable groups. However, we do not know if these clusters represent fundamental units of bacterial diversity, such as “species,” nor do we know the nature of evolutionary and ecological forces that
Timothy J. Straub, Olga Zhaxybayeva
openaire   +2 more sources

Community assembly during vegetation succession after metal mining is driven by multiple processes with temporal variation

open access: yesEcology and Evolution, 2022
The mechanisms governing community assembly is fundamental to ecological restoration and clarification of the assembly processes associated with severe disturbances (characterized by no biological legacy and serious environmental problems) is essential ...
Ting Li   +11 more
doaj   +1 more source

First Description of Invertebrate Benthic Fauna in the Middle Zone of the Loa River (Chile)

open access: yesZoodiversity, 2023
Aquatic insect communities in inland waters of Chile are characterised by the presence of certain species depending on water quality, but there is little information on statistical ecology in the structure of insect communities.
P. De los Rios-Escalante   +3 more
doaj   +1 more source

A matrix model for the null-brane [PDF]

open access: yesJournal of High Energy Physics, 2006
26 pages, LaTeX; references ...
Robbins, Daniel, Sethi, Savdeep
openaire   +2 more sources

The “Null-A” superintegrability for monomial matrix models

open access: yesAnnals of Physics, 2023
We find that superintegrability (character expansion) property persists in the exotic sector of the monomial non-Gaussian matrix model, with potential $\Tr X^r$, in pure phase, where the naive partition function $\langle 1 \rangle$ vanishes. The role of the (anomaly-corrected) partition function is played by $\left\langleχ_ρ\right\rangle$ -- the Schur ...
Barseghyan, S., Popolitov, A.
openaire   +2 more sources

Community structure of benthic invertebrates in the Allipén River basin, North Patagonia, Araucania region (38º S, Chile)

open access: yesBrazilian Journal of Biology, 2021
One of the biological indicators most used to determine the health of a fluvial ecosystem are the benthic macroinvertebrates. The presence of recurrent species in a wide gradient of latitudes, dominates the biogeographic pattern of the benthic ...
K. Solis-Lufí   +6 more
doaj   +1 more source

Co-occurrence patterns of fish communities in littorals of three floodplain lakes of the Orinoco River, Venezuela

open access: yesJournal of Threatened Taxa, 2017
The co-occurrence patterns of fish communities in the littorals of three lagoons of the Orinoco River floodplain in Venezuela were studied during four hydrological phases: low, rising, high and falling waters, from 2008–2009, using null models.
Gabriela E. Echevarría   +1 more
doaj   +1 more source

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