1 / 17

an inadvert e nt opening ramble about networks

an inadvert e nt opening ramble about networks.

samson
Télécharger la présentation

an inadvert e nt opening ramble about networks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. an inadvertent opening ramble about networks

  2. Predation is a straight-forward interspecies population interaction. One species uses another as a food resource. Predators play an important role in controlling prey population numbers in some systems. In simple systems, the predator-prey relationship results in coupled population osscilations

  3. Classic example of predator-prey dynamics: Canadian lynx & snowshoe hare Coupled oscillation

  4. prey numbers increase, predator numbers increase…to a point where the predation causes population decline in the prey item..

  5. These dramas are the (proverbial) tip of the iceberg. Ecological community interactions are extremely complex…

  6. Predators, that are NOT directly interacting, but are ecologically interdependent Herbivores, that are competing, and also prey items Here is the ecological story: In competition, the larger Daphnia will outcompete the smaller Daphnia. The salamanders eat the larger Daphnia, allowing the smaller Daphnia to persist. The midge can ONLY eat the smaller Daphnia. Thus, where the salamander larva is present, the midge larva do well… because they control the population of the midge prey’s competitor.

  7. example of a typical ecological interaction?

  8. resource example of a typical ecological interaction?

  9. 30 boxes, one form of interaction… = 28 million pathways… What do we do with systems where there are multiple modes of interaction, and more species (LCW = 300 species of herbaceous plant)

More Related