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Like gems flitting through the sky, hummingbirds attract our eye. But they are more than flash: they are critical pollinators in their ecosystems. Similarly in the darkness of night, nectar-feeding bats perform the same important ecological service as their colorful avian counterparts. Vertebrate pollinators like bats and birds are keystone species of the Sonoran Desert. Biologist Theodore H. Fleming uses these species—found in the desert around his home—to address two big questions dealing with the evolution of life on Earth: How did these animals evolve, and how did they coevolve with their food plants? A deeply thoughtful and researched dive into evolutionary history, Birds, Bats, and Blooms offers an engaging trip across evolutionary trajectories as it discusses nectar-feeding birds and bats and their coevolution as pollinators with flowering plants. The primary focus is on New World birds such as hummingbirds and their chiropteran counterparts (nectar-feeding bats in the family Phyllostomidae). It also discusses their Old World ecological counterparts, including sunbirds, honeyeaters, lorikeets, and nectar-feeding bats in the Pteropodidae family. Fleming also addresses the conservation status of these beautiful animals. Through engaging prose, Fleming pulls together the most recent research in evolutionary biology and pairs it with accounts of his personal interactions with bats and birds. His account includes fourteen color photographs taken by the author during his research trips around the world.

This book presents a hypothesis and evidence that organisms promote and ecosystems maximize biodiversity. All species have a net positive effect on their environment, other species, and diversity. The sun is 30% hotter than when life began, but the temperature has been kept moderate by life. Life created high oxygen, the ozone layer, and fertile soil, a diverse, living system. No species evolves in isolation, and most evolution is coevolution. The nature and number of links between species are as important as species number. Eukaryotes coevolve with complex ecosystems of microbes with which they exchange genes. Genomes and intraspecific interactions both act to promote evolution and diversification. Viruses increase diversity of their hosts and cause macroevolutionary transitions. Key Features Life alters the Earth in ways that increase biodiversity All species make their environment better for other species and promote diversity Life created the life-friendly atmosphere, temperature, and soil of today

Traditional ecological approaches to species evolution have frequently studied too few species, relatively small areas, and relatively short time spans. In The Coevolutionary Process, John N. Thompson advances a new conceptual approach to the evolution of species interactions—the geographic mosaic theory of coevolution. Thompson demonstrates how an integrated study of life histories, genetics, and the geographic structure of populations yields a broader understanding of coevolution, or the development of reciprocal adaptations and specializations in interdependent species. Using examples of species interactions from an enormous range of taxa, Thompson examines how and when extreme specialization evolves in interdependent species and how geographic differences in specialization, adaptation, and the outcomes of interactions shape coevolution. Through the geographic mosaic theory, Thompson bridges the gap between the study of specialization and coevolution in local communities and the study of broader patterns seen in comparisons of the phylogenies of interacting species.