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In his meticulous notes on the natural history of Concord, Massachusetts, Henry David Thoreau records the first open flowers of highbush blueberry on May 11, 1853. If he were to look for the first blueberry flowers in Concord today, mid-May would be too late. In the 160 years since Thoreau’s writings, warming temperatures have pushed blueberry flowering three weeks earlier, and in 2012, following a winter and spring of record-breaking warmth, blueberries began flowering on April 1—six weeks earlier than in Thoreau’s time. The climate around Thoreau’s beloved Walden Pond is changing, with visible ecological consequences.
           
In Walden Warming, Richard B. Primack uses Thoreau and Walden, icons of the conservation movement, to track the effects of a warming climate on Concord’s plants and animals. Under the attentive eyes of Primack, the notes that Thoreau made years ago are transformed from charming observations into scientific data sets. Primack finds that many wildflower species that Thoreau observed—including familiar groups such as irises, asters, and lilies—have declined in abundance or have disappeared from Concord. Primack also describes how warming temperatures have altered other aspects of Thoreau’s Concord, from the dates when ice departs from Walden Pond in late winter, to the arrival of birds in the spring, to the populations of fish, salamanders, and butterflies that live in the woodlands, river meadows, and ponds. 
           
Primack demonstrates that climate change is already here, and it is affecting not just Walden Pond but many other places in Concord and the surrounding region. Although we need to continue pressuring our political leaders to take action, Primack urges us each to heed the advice Thoreau offers in Walden: to “live simply and wisely.” In the process, we can each minimize our own contributions to our warming climate.

From floods and droughts to tsunamis and hurricanes, recent years have seen a distressing and often devastating increase in extreme climatic events. While it is possible to study these disasters from a purely scientific perspective, a growing preponderance of evidence suggests that changes in the environment are related to both a shift in global economic relations and these weather-related disasters.

In Weathering Risk in Rural Mexico, Hallie Eakin draws on ethnographic data collected in three agricultural communities in rural Mexico to show how economic and climatic change are not only linked in cause and effect at the planetary scale but also interact in unpredictable and complex ways in the context of regional political and trade relationships, national economic and social programs, and the decision making of institutions, enterprises, and individuals.She shows how the parallel processes of globalization and climatic change result in populations that are “doubly exposed” and thus particularly vulnerable.

Chapters trace the effects of El Niño in central Mexico in the late 1990s alongside some of the principal changes in the country’s agricultural policy. Eakin argues that in order to develop policies that effectively address rural poverty and agricultural development, we need an improved understanding of how households cope simultaneously with various sources of uncertainty and adjust their livelihoods to accommodate newly evolving environmental, political, and economic realities.

Human-induced climate change is emerging as one of the gravest threats to biodiversity in history, and while a vast amount of literature on the ecological impact of climate change exists, very little has been dedicated to the management of wildlife populations and communities in the wake of unprecedented habitat changes. Wildlife Conservation in a Changing Climate is an essential resource, bringing together leaders in the fields of climate change ecology, wildlife population dynamics, and environmental policy to examine the impacts of climate change on populations of terrestrial vertebrates. Chapters assess the details of climate change ecology, including demographic implications for individual populations, evolutionary responses, impacts on movement patterns, alterations of species interactions, and predicting impacts across regions. The contributors also present a number of strategies by which conservationists and wildlife managers can counter or mitigate the impacts of climate change as well as increase the resilience of wildlife populations to such changes. A seminal contribution to the fields of ecology and conservation biology, Wildlife Conservation in a Changing Climate will serve as the spark that ignites a new direction of discussions about and action on the ecology and conservation of wildlife in a changing climate.