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How to predict community responses to perturbations in the face of imperfect knowledge and network complexity
Populations and Evolution · Submitted 15 Feb 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Finally, in our assessment of model food webs, we find that it is most important to precisely measure the mortality and predation rates of long-lived, generalist, top predators.
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The abstract, sentence by sentence
It is a challenge to predict the response of a large, complex system to a perturbation. Recent attempts to predict the behaviour of food webs have revealed that the effort needed to understand a system grows quickly with its complexity, because increasingly precise information on the elements of the system is required. Here, we show that not all elements of the system need to be measured equally well. This suggests that a more efficient allocation of effort to understand a complex systems is possible. We develop an iterative technique for determining an efficient measurement strategy. Finally, in our assessment of model food webs, we find that it is most important to precisely measure the mortality and predation rates of long-lived, generalist, top predators. Prioritizing the study of such species will make it easier to understand the response of complex food webs to perturbations.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | It is a challenge to predict the response of a large, complex system to a perturbation. | background 1.00 | 0.04 | 0.02 | asserted 1.00 |
| s1 | Recent attempts to predict the behaviour of food webs have revealed that the effort needed to understand a system grows quickly with its complexity, because increasingly precise information on the elements of the system is required. | background 0.99 | 0.05 | 0.03 | asserted 0.99 |
| s2 | Here, we show that not all elements of the system need to be measured equally well. | result 0.71 | 0.67 | 0.39 | asserted 1.00 |
| s3 | This suggests that a more efficient allocation of effort to understand a complex systems is possible. | interpretation 0.99 | 0.21 | 0.21 | hedged possibility 0.97 |
| s4 | We develop an iterative technique for determining an efficient measurement strategy. | method 0.90 | 0.94 | 0.07 | asserted 1.00 |
| s5 | Finally, in our assessment of model food webs, we find that it is most important to precisely measure the mortality and predation rates of long-lived, generalist, top predators. | result 1.00 | 0.94 | 0.70 | asserted 1.00 |
| s6 | Prioritizing the study of such species will make it easier to understand the response of complex food webs to perturbations. | interpretation 0.94 | 0.41 | 0.41 | asserted 0.59 |
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The paper
Original abstract
It is a challenge to predict the response of a large, complex system to a perturbation. Recent attempts to predict the behaviour of food webs have revealed that the effort needed to understand a system grows quickly with its complexity, because increasingly precise information on the elements of the system is required. Here, we show that not all elements of the system need to be measured equally well. This suggests that a more efficient allocation of effort to understand a complex systems is possible. We develop an iterative technique for determining an efficient measurement strategy. Finally, in our assessment of model food webs, we find that it is most important to precisely measure the mortality and predation rates of long-lived, generalist, top predators. Prioritizing the study of such species will make it easier to understand the response of complex food webs to perturbations.
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