I would like to thank the many inspirational individuals and organisations who have made this book possible through their meticulous study of keystone species, their habitats, threats, ecological history and ecosystem effect. These include:
S. Elizabeth Alter, Henrik Andrén, Marie Baltzinger, Ross Barnett, Lucas Battisti, Alison Benjamin, Robert L. Beschta, Andrzej Bobiec, Richard Brazier, Gabe Brown, John Burnside, Charles Burrell, Róisín Campbell-Palmer, Sean Carroll, Rachel Carson, Hilary A. Cooke, Jim Crumley, Lutz Dalbeck, Charles Darwin, María del Mar Delgado, Roy Dennis, Patrick Duncan, James A. Estes, Richard Evans, Jean-Martin Fortier, Martin Gaywood, Ben Goldfarb, Ben Goldsmith, Dave Goulson, Derek Gow, Stephen J. G. Hall, Vladimír Hanzal, David Hetherington, Fernando Hiraldo, Pawel Janiszewski, Jaime E. Jiménez, Carol A. Johnston, Chris Jones, Robert Kenward, Trish J. Lavery, Alan Law, Olof Liberg, Leo Linnartz, Rui Lourenço, Brian McCallum, Renée Meissner, Wojciech Misiukiewicz, George Monbiot, Marianne Pasanen-Mortensen, Anna-Katharina Mueller, Ian Newton, John Odden, Vincenzo Penteriani, Andrew J. Pershing, Krzysztof Pietrasz, Benno Pokorny, Michael M. Pollock, Alan Puttock, James Rebanks, William J. Ripple, Stephen Roberts, Robert C. Rocha, Ana S. L. Rodrigues, Joe Roman, Irina I. Rotenko, Francisco Sánchez-Bayo, Frédéric de Schaetzen, Fabrizio Sergio, Vadim Sidorovich, Natasha K. E. Sims, Merlin Sheldrake, David J. Slater, Victor Smetacek, Laura V. Smith, Douglas W. Smith, Cameron E. Stevens, Erik Stokstad, Andrew Stringer, Isabella Tree, Deborah Uchida, Franz Vera, Jeff Watson, Nigel J. Willby, Sophie-lee Williams, Peter Wohlleben, Ben A. Woodcock, Kris A. G.Wyckhuys, Derek Yalden and Dorothy Yamamoto.