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Why do species live where they live? What determines the abundance and diversity of species in a given area? What role do species play in the functioning of entire ecosystems? All of these questions share a single core concept—the ecological niche. Although the niche concept has fallen into disfavor among ecologists in recent years, Jonathan M. Chase and Mathew A. Leibold argue that the niche is an ideal tool with which to unify disparate research and theoretical approaches in contemporary ecology. Chase and Leibold define the niche as including both what an organism needs from its environment and how that organism's activities shape its environment. Drawing on the theory of consumer-resource interactions, as well as its graphical analysis, they develop a framework for understanding niches that is flexible enough to include a variety of small- and large-scale processes, from resource competition, predation, and stress to community structure, biodiversity, and ecosystem function. Chase and Leibold's synthetic approach will interest ecologists from a wide range of subdisciplines.
You may think you know how this cancer story goes. The characters: a little boy, a loving family, the team of doctors. The diagnosis: terminal, little hope for a cure. There are two possible outcomes. Will his family be plunged into extreme sorrow or miraculous joy? What if the answer was both? Ellie Poole Ewoldt debuts with a memoir of desperate hope and fierce love; of a family who refused to give up even when they heard the worst possible news for their two-year-old son, Chase. Moment by moment, the Ewoldts faced brain surgery and chemo, spinal taps and transfusions. And yet, the true miracle lay not in the medicine or Chase’s prognosis—rather, Chase’s life shows us the miracle of hope, even through the darkest nights. If there is anything he and the Ewoldts have learned, it is that God is always good and will stay at your side through every moment, no matter what it holds. You’ll fall in love with Chase through his story and be inspired to help chase away cancer—for this headstrong boy, his fighting friends, and all those in your own life who need hope for whatever tomorrow may bring.
Find out what's going on any day of the year, anywhere across the globe! The world’s date book since 1957, Chase's is the definitive, authoritative, day-by-day resource of what the world is celebrating. From national days to celebrity birthdays, from historical milestones to astronomical phenomena, from award ceremonies and sporting events to religious festivals and carnivals, Chase's is the must-have reference used by experts and professionals—a one-stop shop with 12,500 entries for everything that is happening now or is worth remembering from the past. Completely updated for 2022, Chase's also features extensive appendices as well as a companion website that puts the power of Chase's at the user's fingertips. 2022 is packed with special events and observances, including National days and public holidays of every nation on Earth Scores of new special days, weeks and months Birthdays of new world leaders, lauded authors, and breakout celebrities Info on key anniversaries, such as the 200th birth anniversaryof Harriet Tubman, the 100th anniversary of the first insulin treatment, the 100th anniversary of the discovery of King Tut's tomb, the 75th anniversary of Jackie Robinson breaking the color line, and the 150th anniversary of Yellowstone. And much more! All from the reference book that Publishers Weekly calls "one of the most impressive reference volumes in the world."