By Sven Erik Jorgensen
Jorgensen's surroundings Ecology presents a radical and accomplished review of the world's aquatic and terrestrial ecosystems. This spinoff quantity in line with the best-selling Encyclopedia of Ecology (published 2008) is the one booklet at the moment released that gives an summary of the world's ecosystems in a concise layout.
* offers an outline of the world's ecosystems in a concise format
* Covers aquatic and terrestrial ecosystems
* according to the best-selling Encyclopedia of Ecology
* Full-color figures and tables help the textual content and reduction in understanding
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Extra resources for Ecosystem Ecology
Researchers have exploited this difference to answer many important ecosystem level questions. Below are two examples. During the late 1970s and early 1980s, in the western Aleutian Islands of Alaska, where sea otters had recovered from overexploitation and suppressed their herbivorous urchin prey, productive kelp beds dominated. There, transplanted filter feeders, barnacles and mussels, grew up to 5 times faster compared to islands devoid of kelp where sea otters were scarce and urchin densities high.
For example, over 100 000 species of animals provide free pollination services, including bats, bees, flies, moths, beetles, birds, and butterflies (Figure 10). Based on the estimate that one third of human food comes from plants pollinated by wild pollinators, pollination has been valued at US$4–6 billion per year in the US alone. Globally, the world’s ecosystem services have been valued at US$33 trillion a year, nearly twice as much as the gross national product of all of the world’s countries.
M. Teal. In the late 1960s, Likens, Bormann, and others took an ecosystem approach to studying biogeochemical cycles by manipulating whole watersheds in the Hubbard Brook Experimental Forest to determine whether logging, burning, or pesticide and herbicide use had an appreciable effect on nutrient loss from the ecosystem. This research set an important precedent in demonstrating the value of conducting experiments at the scale of an entire ecosystem (see the section entitled ‘Whole ecosystem experiments’), a sig nificant advancement which continues to inform ecosystem studies today.
Ecosystem Ecology by Sven Erik Jorgensen