PeerJ Author 35 Points Contributions by role Preprint Author 35 Contributions by subject area Ecology Ecosystem Science Lei Shi PeerJ Author Summary Adaptive & Self-Organizing Systems Additive Manufacturing Agents & Multi-Agent Systems PeerJ Contributions Preprints 1 September 30, 2019 - Version: 1 Mapping ecological trends by keywords in the last 20 years Lei Shi https://doi.org/10.7287/peerj.preprints.27994v1