The Ecology of Eden Chapter 1 (Spencer Mottley)
The first chapter of "The Ecology of Eden" titled "The Marriage of Grass and Man", disscusses how we
as humans shape the enviroment around us and partner with certain species to meet our own needs. As
disscussed in this chapter, one of the most usefull species humans have formed an allience with is grass. In
palothic times grass aided human expansion due to the fact it provided abundent forage for the rument
animals we often hunted. To facilitate the grassland conditions that the wild grazeing animals seeked.
Early man would often conduct prescribed burns to keep trees from establishing and to rid an area of dead
unproductive grass. Later on in neolthic times grass aided in human expansion because it provided forage
for pepoles livestock and certain varieties particularly domestic ones like corn were also consumed
directly by humans. To facilitate the growth of domesticated grasses humans would "make their bed and
plant their seed" (page 6). The relationship between humans and grass serves as a symbotic relationship or
partnership because grasses and humans both help each other out. Grasses help humans by provideing
forage for prey animals and livestock and by provideing humans with food directly. Humans help grass by
createing favorable growing conditions though varouis types of distrubances (noteabley fire) and though
planting the seeds of domestic grasses. Towards the end of the chapter the book discusses the difference
between pioneer species and expansionsit species and why humans fit into the expansionist category.
Pioneer species are organisms that thrive in the near immedite aftermath of a distrubence but often wither
away as the ecosystem restablizes, these species often act on their own and lack the ablity to form
symbotic relationships. Expansionist species on the other hand are organisms that act as the distrubence
themselves and have the ability to thrive in well established ecosystems and to form symbotic
relationships to facilitate their own success. Humans are an expansionist species because we create
distrubances ourselves instead of waiting for them to occur on their own, we form symbotic relationships
to facilitate our own success and we remain competive even as the ecosystem establishes around us. After
reading this chapter I was left with a question, "are invasive species generally pioneer species or
expansionist species? My answer to this question would be expansionist species because invasive species
have the ability to create distrubances on there own, overtake established ecosystems and in some cases
even form symbotic relationships with humans (for example, outdoor cats).
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