Wipf D, Krajinski F, Tuinen D, Recorbet G, Courty P. 2019. Trading on the arbuscular mycorrhiza market: from arbuscules to common mycorrhizal networks. New Phytologist 223: 1127–142.

Wisecaver JH, Slot JC, Rokas A. 2014. The evolution of fungal metabolic pathways. PLOS Genetics 10: e1004816.

Witt P. 1971. Drugs alter web-building of spiders: a review and evaluation. Behavioral Science 16: 98–113.

Wolfe BE, Husband BC, Klironomos JN. 2005. Effects of a belowground mutualism on an aboveground mutualism. Ecology Letters 8: 218–23.

Wright CK, Wimberly MC. 2013. Recent land use change in the Western Corn Belt threatens grasslands and wetlands. Proceedings of the National Academy of Sciences 110: 4134–139.

Wulf A. 2015. The Invention of Nature. New York, NY: Alfred A. Knopf.

Wyatt GA, Kiers TE, Gardner A, West SA. 2014. A biological market analysis of the plant-mycorrhizal symbiosis. Evolution 68: 2603–618.

Yano JM, Yu K, Donaldson GP, Shastri GG, Ann P, Ma L, Nagler CR, Ismagilov RF, Masmanian SK, Hsiao EY. 2015. Indigenous bacteria from the gut microbiota regulate host serotonin biosynthesis. Cell 161: 264–76.

Yon D. 2019. Now You See It. Quanta: aeon.co/essays/how-our-brain-sculpts-experience-in-line-with-our-expectations? [accessed October 29, 2019].

Yong E. 2014. The Guts That Scrape The Skies. National Geographic: www.nationalgeographic.com/science/phenomena/2014/09/23/the-guts-that-scrape-the-skies/ [accessed October 29, 2019].