Download How the Earthquake Bird Got Its Name and Other Tales of an by H.H. Shugart PDF

By H.H. Shugart

Even though humans were changing earth’s landscapes to some degree for tens of millions of years, humankind this present day is inflicting mammoth alterations to the planet. Such common environmental swap is followed by way of accelerating charges of species extinction. during this e-book, famous ecologist H. H. Shugart provides very important ecological ideas via exciting animal parables. He tells the tales of specific birds and mammals—the packrat, ivory-billed woodpecker, penguin, dingo, eu rabbit, and others—and what their fates demonstrate concerning the interactions among environmental swap and the extinctions or explosions of species populations. switch is the foundation of many planetary difficulties, however it is additionally an intrinsic characteristic of our dwelling planet. Shugart explores earlier environmental switch, discusses the non-existence of a “balance of Nature,” and files how human changes have affected crops, soils, and animals. He appears to be like with desire towards a destiny within which considerate humans learn—and use—ecological technological know-how to guard the landscapes upon which terrestrial creatures rely.

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The Black-Headed Bird Named Whitehead 39 oceans would look and behave like the familiar auks of the northern oceans. 24 If one could find analogous niches for species in communities in widely separated locations, then one also could think of communities as having “empty niches”— vacant ecological jobs waiting to be performed by an appropriate species, perhaps from some other part of the world. He emphasized interactions among the different populations of animals and plants. His initial concept stressed that “you are what you eat”; ecological community patterns could be understood from the feeding relations among species.

When a large, mature, Role 1 tree dies, it would be expected to create a large gap that would encourage its own regeneration, as well as that of all the other Role 1 species. In addition, it would encourage the Role 3 species in the community that also need gaps to regenerate. Trees in the other categories play out their strategies to influence their own regeneration and that of other species. The interplay creates a complex web of species interactions (Figure 7) on the mosaic battlefields of the forest landscape.

F. Gause, produced a clever set of laboratory experiments to understand competition between species. Gause worked with three species of the microscopic protozoan genus, Paramecium; pairs of these species competed for food. The experiments used test-tube Paramecium populations fed by regular inoculations of yeast cells. 26 Gause’s data strongly resembled (and in this sense, confirmed) the results predicted from theoretical analysis of dynamic equations for interacting populations. The joining of mathematical descriptions of the growth, death, and competition of species with experimental results held the promise of moving population and community biology to a more rigorous, mathematically formal level—an exciting breakthrough for theoretical population ecology.

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