Results 81 to 90 of about 3,161,795 (320)
Evolutionary Model of Species Body Mass Diversification [PDF]
Phys. Rev. Lett. 102, 038103 (2009), 2008 We present a quantitative model for the biological evolution of species body masses within large groups of related species, e.g., terrestrial mammals, in which body mass M evolves according to branching (speciation), multiplicative diffusion, and an extinction probability that increases logarithmically with mass.
arxiv +1 more source
The conservation of New Zealand’s biological heritage and the role of environmental planners [PDF]
, 1998 Species diversity is an important aspect of ecosystem health, and a necessary condition for long-term sustainable development. However, it is widely recognised that species extinction is on the increase, as biological diversity comes under pressure from ...
Jay, Grace Mairi M., Morad, Munir
core +1 more source
A Homeostatic Photonic Device Integrating Vapor‐Regulated Thermo‐Optical Feedback Mechanisms
Advanced Functional Materials, EarlyView.An inorganic homeostatic photonic device is designed to autonomously regulate light, temperature, and vapor sorption through integrated positive and negative feedback mechanisms at multiple wavelengths. The device uses a graded mesoporous 1D photonic crystal coupled with a photothermal layer.
Caroline Byun +4 more
wiley +1 more source
Biological invasions by exotic grasses, the grass/fire cycle, and global change
, 1992 Biological invasions into wholly new regions are a consequence of a far reaching but underappreciated component of global environmental change, the human-caused breakdown of biogeographic barriers to species dispersal .
C. D’Antonio, P. Vitousek
semanticscholar +1 more source
Dynamics Analysis of a Stochastic Hybrid Logistic Model with Delay and Two-Pulse Perturbations
Complexity, 2020 In this paper, we propose and discuss a stochastic logistic model with delay, Markovian switching, Lévy jump, and two-pulse perturbations. First, sufficient criteria for extinction, nonpersistence in the mean, weak persistence, persistence in the mean ...
Haokun Qi, Hua Guo
doaj +1 more source
Edge vulnerability in neural and metabolic networks
, 2004 Biological networks, such as cellular metabolic pathways or networks of corticocortical connections in the brain, are intricately organized, yet remarkably robust toward structural damage.
Hilgetag, Claus C., Kaiser, Marcus
core +1 more source
Advanced Functional Materials, EarlyView.This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous
Mingfeng Xu +5 more
wiley +1 more source
Local Extinction of Bull Kelp (Durvillaea spp.) Due to a Marine Heatwave
Frontiers in Marine Science, 2019 Detailed research has documented gradual changes to biological communities attributed to increases in global average temperatures. However, localized and abrupt temperature anomalies associated with heatwaves may cause more rapid biological changes.
M. Thomsen +7 more
semanticscholar +1 more source
Bistability induced by generalist natural enemies can reverse pest invasions [PDF]
, 2016 Reaction-diffusion analytical modeling of predator-prey systems has shown that specialist natural enemies can slow, stop and even reverse pest invasions, assuming that the prey population displays a strong Allee effect in its growth.
Barles, Guy +3 more
core +2 more sources
Advanced Functional Materials, EarlyView.Phosphorescent OLEDs suffer from efficiency roll‐off due to triplet‐polaron quenching (TPQ). This study demonstrates for a large set of host‐guest combinations a spectroelectrochemical method to measure the absorption of charged molecules, enabling determining TPQ Förster radii (2.5–4 nm) from the spectral overlap.
Stan E. A. Jaspars +5 more
wiley +1 more source