Spatial pattern formation in an insect host-parasitoid system     

JL Maron  S Harrison 《Science (New York, N.Y.)》1997,278(5343):1619-1621

Spatial models in ecology predict that populations may form patchy distributions within continuous habitats, through strong predator-prey or host-parasitoid interactions combined with limited dispersal. Empirical support of these models is provided. Parasitoids emanating from a population outbreak of tussock moths (Orgyia vetusta) suppressed the growth of nearby experimental populations of the moth, while experimental populations farther away were able to grow. This result explains the observed localized nature of tussock moth outbreaks and illustrates how population distributions can be regulated by dynamic spatial processes.  相似文献   

Earth-Based Observations of the Galileo Probe Entry Site     

G Orton  JL Ortiz  K Baines  G Bjoraker  U Carsenty  F Colas  A Dayal  D Deming  P Drossart  E Frappa  J Friedson  J Goguen  W Golisch  D Griep  C Hernandez  W Hoffmann  D Jennings  C Kaminski  J Kuhn  P Laques  S Limaye  H Lin  J Lecacheux  T Martin  G McCabe  T Momary  D Parker  R Puetter  M Ressler  G Reyes  P Sada  J Spencer  J Spitale  S Stewart  J Varsik  J Warell  W Wild  P Yanamandra-Fisher  G Fazio  J Hora  L Deutsch 《Science (New York, N.Y.)》1996,272(5263):839-840

Earth-based observations of Jupiter indicate that the Galileo probe probably entered Jupiter's atmosphere just inside a region that has less cloud cover and drier conditions than more than 99 percent of the rest of the planet. The visual appearance of the clouds at the site was generally dark at longer wavelengths. The tropospheric and stratospheric temperature fields have a strong longitudinal wave structure that is expected to manifest itself in the vertical temperature profile.  相似文献