Results 281 to 290 of about 5,861,528 (330)

Landscape does matter: disentangling founder effects from natural and human-aided post-introduction dispersal during an ongoing biological invasion.

Journal of Animal Ecology, 2020
Environmental features impacting the spread of invasive species after introduction can be assessed using population genetic structure as a quantitative estimation of effective dispersal at the landscape scale.
Stéphanie Sherpa, J. Renaud, M. Guéguen, G. Besnard, Loic Mouyon, D. Rey, L. Després   +6 more
semanticscholar   +1 more source

Resource‐Dependent Dispersal and the Speed of Biological Invasions

American Naturalist, 2006
Many mobile organisms exhibit resource-dependent movement in which movement rates adjust to changes in local resource densities through changes in either the probability of moving or the distance moved. Such changes may have important consequences for invasions because reductions in resources behind an invasion front may cause higher dispersal while ...
William F Morris, Greg Dwyer
exaly   +3 more sources

Dispersion of nanoparticles in media of biological interest

MRS Proceedings, 2011
ABSTRACTNanoparticles (NP) are introduced in a growing number of commercial products, including food and beverage, daily use hygiene products such as toothpaste, or orally-administered drugs. To study the possible toxicity of these nanoparticles, a model system is the in vitro response of eukaryotic cells to the presence of NP.
Carriere, M., Casanova, A., Herlin-Boime, Nathalie   +2 more
openaire   +1 more source

Biological response to dissolved versus dispersed oil

Marine Pollution Bulletin, 2020
The water-soluble compounds of oil (e.g. low molecular weight PAHs) dissolve as a function of their physicochemical properties and environmental conditions, while the non-soluble compounds exist as dispersed droplets. Both the chemical and physical form of oil will affect the biological response.
Gopal, Bera, Shawn, Doyle, Uta, Passow, Manoj, Kamalanathan, Terry L, Wade, Jason B, Sylvan, Jose L, Sericano, Gerardo, Gold, Antonietta, Quigg, Anthony H, Knap   +9 more
openaire   +2 more sources

Linking parasitoid nectar feeding and dispersal in conservation biological control

Biological control (Print), 2019
The nectar provision hypothesis posits that biological control by parasitoids can be enhanced by providing supplemental nectar in the vicinity of cropland.
G. Heimpel
semanticscholar   +1 more source

Effects of Predator and Prey Dispersal on Success or Failure of Biological Control

Bulletin of Mathematical Biology, 2009
Biological control, defined as the reduction of pest populations by natural enemies, is often a component of integrated pest management strategies. Augmentation of natural enemy numbers by planned releases is a common biological control method, the successes and failures of which have been extensively reviewed.
Sanyi Tang, Robert A. Cheke, Yanni Xiao
exaly   +3 more sources

Gold nanoparticles: dispersibility in biological media and cell-biological effect

Journal of Materials Chemistry, 2010
Spherical gold nanoparticles with a hydrodynamic diameter between 25 and 37 nm were prepared and stabilised with poly(N-vinylpyrrolidone) (PVP) or tris(sodium-m-sulfonatophenyl)phosphine (TPPTS). They were subjected to different cell culture media, e.g.
Mahl, Dirk, Greulich, Christina, Meyer-Zaika, Wolfgang, Köller, Manfred, Epple, Matthias   +4 more
openaire   +1 more source

Biological and Ecological Effects of Dispersants

1989
In the marine environment, commercial dispersants have been employed as part of the clean-up strategy following major oil spills since the late 1960’s and the Torrey Canyon disaster. However, considerable controversy has surrounded the use of these surfactant (“surface active agent”) formulations under such circumstances.
M. W. Trett, S. Shales, B. A. Thake, B. Frankland, D. H. Khan, J. D. Hutchinson, C. F. Mason   +6 more
openaire   +1 more source

Dispersion modelling for biological threat

2015 12th International Bhurban Conference on Applied Sciences and Technology (IBCAST), 2015
Accidental release scenario related to chemical can be simulated through different software application available in market. CHARM ® is one of the software applications which handle movement of airborne particles in complex terrain. The aim of this paper is to explain how dispersion for Biological threat can be achieved by using same software package ...
openaire   +1 more source

A ‘Goldilocks’ hypothesis for dispersal of biological control agents

BioControl, 2011
The rate at which biological control agents disperse from release sites has important implications for their establishment and spread. Low rates of dispersal can yield spread that is too slow and may necessitate redistribution efforts for importation biological control and a high density of release sites for augmentation.
George E. Heimpel, Mark K Asplen
exaly   +2 more sources