搜索结果: 1-9 共查到“理学 Food Chain”相关记录9条 . 查询时间(0.072 秒)
When it comes to predators, the biggest mouths may not take the biggest bite. According to a new study from bioscientists at Rice University, some predators have their greatest ecological impacts befo...
The roles of productivity and ecosystem size in determining food chain length in tropical terrestrial ecosystems
ecosystem size food chain length food web structure islands
2015/11/13
Many different drivers, including productivity, ecosystem size, and disturbance,
have been considered to explain natural variation in the length of food chains. Much remains
unknown about the role o...
Contamination of Clays with Dioxins and Possible Consequences for the Food Chain and Bioaccumulation in Humans
Contamination Clays Dioxins Possible Consequences Food Chain Bioaccumulation Humans
2012/3/14
Contamination of Clays with Dioxins and Possible Consequences for the Food Chain and Bioaccumulation in Humans.
The chaos and control of food chain model using nonlinear feedback
Food chain Limit cycles Chaotic behavior
2010/9/10
This paper studies the chaos and control of a continuous time food chain model which contains one prey, one predator and super-predator. We show that this system can be asymptotically stabilized using...
Existence and Global Attractivity of Periodic Solutions in $n$-Species Food-Chain System with Time Delays
Time delay Periodic solution Global attractivity
2008/7/1
A delayed periodic n-species simple food-chain system with Holling type-II functional response is investigated. By means of Gaines and Mawhin's continuation theorem of coincidence degree theory and by...
Periodic Solution of a Nonautonomous Diffusive Food Chain System of Three Species with Time Delays
diffusive food chain system positive periodic solution
2007/12/11
By using the continuation theorem of coincidence degree theory, the existence of a positive periodic solution for a nonautonomous diffusive food chain system of three species. { dx_1(t)/dt = x_1(t)[r_...
Confirmation of a new food chain utilizing geothermal energy: Unusual fatty acids of a deep-sea bivalve, Calyptogena phaseoliformis
chain utilizing geothermal energy a deep-sea bivalve
2014/4/22
Neutral and polar lipids of the cold-seep clam Calyptogena phaseoliformis were determined to assess the trophic
relationship at hydrothermal vents. The clam obtained many of its lipids from the chemo...
Competition between protons and cadmium ions in the planktonic food chain leading to the phantom midge Chaoborus
protons cadmium ions
2014/5/4
Cadmium concentrations in the phantom midge Chaoborus can be related to those of the free Cd ion, Cd2+, in lakewater provided that the competitive influence of H+ on Cd uptake sites is considered. Bec...
Polyunsaturated fatty acids in the food chain in the United States
Highly unsaturated fatty acids a-linolenic acid eicosapentaenoic acid docosahexaenoic acid n26 fatty acids n23 fatty acids
2016/6/3
In the United States, intake of n23 fatty acids
is <1.6 g/d (<0.7% of energy), of which 1.4 g is a-linolenic acid
(ALA; 18:3) and 0.1–0.2 g is eicosapentaenoic acid (EPA; 20:5)
and docosahexaenoic ...