This paper deals with the succession process of a food web model consisting of one herbivore, two autotrophs and available nutrient in the environment in a closed nutrient flux. The model provides a way of describing successional changes in the form of species replacement with increasing nutrient levels. It is shown that distinct threshold (with upper and lower) values of nutrient are required ...

Ecological succession itself could be a theoretical reference for ecosystem restoration and reconstruction. Glacier forelands are ideal places for investigating plant succession because there are representative ecological succession records at long temporal scales. Based on field observations and experimental data on the foreland of Baishui number 1 Glacier on Mt. Yulong, the succession and dis...

The time between transmitting symbols (the inter-symbol delay) governs the speed at which the link operates. The shorter the inter-symbol delay, the faster the link operates. However, if the inter-symbol delay is too short, then symbols may not arrive at the receiver intact, or in-order. If two symbols are transmitted on the same wire in quick succession, then the resulting pulse may be too sho...

Determining how competing species coexist is essential to understanding patterns of biodiversity. Indirect facilitation, in which a competitively dominant species exerts a positive effect on one competitor by more strongly suppressing a third, shared competitor, is a potentially potent yet understudied mechanism for competitive coexistence. Here we provide evidence for indirect facilitation in ...

Clausius arguments advanced to prove that in a reversible cyclical process the combined value of all the transformations therein occurring must be equal to nothing, are here refuted.

Why do so many newly minted leaders fail so spectacularly? Part of the problem is that in many companies, succession planning is little more than creating a list of high-potential employees and the slots they might fill. It's a mechanical process that's too narrow and hidebound to uncover and correct skill gaps that can derail promising young executives. And it's completely divorced from organi...