Results 1 to 10 of about 1,090,945 (335)
Extinction and morphospace occupation: A critical review
Processes of extinction, especially selectivity, can be studied using the distribution of species in morphospace. Random extinction reduces the number of species but has little effect on the range of morphologies or ecological roles in a fauna or flora ...
P. David Polly
doaj +1 more source
The Sixth Mass Extinction: fact, fiction or speculation?
There have been five Mass Extinction events in the history of Earth's biodiversity, all caused by dramatic but natural phenomena. It has been claimed that the Sixth Mass Extinction may be underway, this time caused entirely by humans.
R. Cowie, P. Bouchet, B. Fontaine
semanticscholar +1 more source
In this paper, a prey-predator model with modified Leslie-Gower and simplified Holling-type Ⅳ functional responses is proposed to study the dynamic behaviors.
Lin Li, Wencai Zhao
doaj +1 more source
Analysis of a stochastic predator-prey system with mixed functional responses and Lévy jumps
In this paper, we consider a stochastic two predator-one prey system consisting of prey, intermediate predator and top predator with Lévy jumps. Here we consider Ratio-dependent function response between intermediate predator and top predator and other ...
Xuegui Zhang, Yuanfu Shao
doaj +1 more source
Extinction behavior for a parabolic p-Laplacian equation with gradient source and singular potential
We concern with the extinction behavior of the solution for a parabolic p-Laplacian equation with gradient source and singular potential. By energy estimate approach, Hardy-Littlewood-Sobolev inequality, a series of ordinary differential inequalities ...
Dengming Liu , Luo Yang
doaj +1 more source
We aimed to investigate the persistent trace of one traumatic event on neurocircuit controls in rats. Conditioning was reflected by reductions in rates of ‘freezing’ and ‘other-than-freezing’ motor activities, between which rats could alternate on ...
Masatoshi Takita, Yumi Izawa-Sugaya
doaj +1 more source
Conservation of Colutea gifana, a rare and potential ornamental species, using in vitro method [PDF]
In vitro methods provide a variety of tools to supplement traditional methods for collection, propagation and preservation of endangered plant species. In this study, an efficient protocol was developed for in vitro propagation of Colutea gifana, a rare ...
Mahnaz Kiani+3 more
doaj +1 more source
Extinction of cue-evoked food seeking recruits a GABAergic interneuron ensemble in the dorsal medial prefrontal cortex of mice [PDF]
Animals must quickly adapt food-seeking strategies to locate nutrient sources in dynamically changing environments. Learned associations between food and environmental cues that predict its availability promote food-seeking behaviors.
Brebner, Leonie S+9 more
core +2 more sources
Correcting for the Effects of Interstellar Extinction [PDF]
This paper addresses the issue of how best to correct astronomical data for the wavelength‐dependent effects of Galactic interstellar extinction. The main general features of extinction from the IR through the UV are reviewed, along with the nature of ...
E. Fitzpatrick
semanticscholar +1 more source
On the basic reproduction number in semi-Markov switching networks
Basic reproduction number $ \mathcal {R}_0 $ in network epidemic dynamics is studied in the case of stochastic regime-switching networks. For generality, the dependence between successive networks is considered to follow a continuous time semi-Markov ...
Xiaochun Cao+3 more
doaj +1 more source