THE nitrogen pools of animals are enriched in 15N relative to their food1, with the top
predators having the highest concentrations of this stable isotope2. The use of δ15N to …

Ecologists have long been studying stability in ecosystems by looking at the structuring and
the strengths of trophic interactions in community food webs. In a series of real food webs …

The stability of ecological communities largely depends on the strength of interactions
between predators and their prey. Here we show that these interaction strengths are …

In 1960, Hairston, Smith, and Slobodkin published their revolutionary paper in which a
relatively reductionist approach, interaction ecology, was joined to a relatively holistic one …

Observed properties of natural food webs have both important theoretical and important
management implications. Four lowland aquatic food webs were investigated over the …

▪ Abstract Many terrestrial communities include omnivorous arthropods that feed on both
prey and plant resources. In this review we first discuss some unique morphological …

In population models, omnivorous predation (ie, predation on> 1 trophic level) generally has
a destabilizing influence, whereas habitat heterogeneity tends to stabilize both predatory …

In all fields of science today, data are collected and theories are developed and published
faster than scientists can keep up with, let alone thoroughly digest. In ecology the fact that …

Resilience is a component of ecological stability; it is assessed as the rate at which
perturbations to a stable ecological system decay. The most frequently used estimate of …

Intraguild predation (IGP), defined as killing and eating among potential competitors, seems
to be a ubiquitous interaction, differing from competition or predation. In the present study we …