1 - In Wonderful Life Gould hypothesizes on cultural
values, assumptions, and what kind of logic are evident in the original
interpretation of the Burgess Shale, and then the change in thinking that led
to its recent re-interpretation. What model of biodiversity and evolutionary
change does Gould argue resulted in the earlier error in classifying the Burgess
Shale animals? What is the original cultural/historical source of that model,
or what he calls “iconography”?
The
model that lead to misinterpretation of evolutionary change was the idea of
classifying species into a canonical ladder system. Although visually it aids
in showing a progressive movement, it does not serve biological and scientific
justice, but rather misconstrues reality. Gould suggests that we should value
species by how they branched into existence and evolved, because we grow by the
aid of other species, not by just one factor, as it seems to demonstrate in the
ladder system. The fossils of the Burgess Shale were categorized into modern
groups, which did not tie with their ancestral background ( that may have been
represented had they made a branching
diagram). It seems that he lightly brushed upon the primitive, but did not give
it the same implied worth that he thought the more “advanced” species were in
this chain, where at the very top lies homo sapien evolution.
2 - Notice that much of Gould’s argument centers on discussing
evolutionary tress (phylogenies) of the kind you constructed on a small scale. At the end of the chapter we
see he is interested in the overall shapes (“topology”) of the
phylogenies. Why? What does he claim that the shape of phylogenies imply about
how evolution happens over long stretches of time that had been neglected by
biologists? What kinds of causal factors alter the course of evolution, the
shape of phylogenies, and the eventual designs of organisms that we see today?
Phylogenies
imply biodiversity and more intricate evolution of a certain species; the
larger and more complex, the scope of diversity increases, thus an assumption
of higher sophistication and implied worth as a species. The lower a species is
placed in the cone of these phylogenical systems, the simpler these animals are
perceieved to be, so they are not looked at with the same integrity as the
species above it hold. They are of “lower class” but in a biological sense.
Advancement and newer forms are also placed above these older forms of life,
also giving it a higher strata of importance.
This
ranking system is skewed, and does not serve as an equal base that all animals
should be based on. Why is it that human interpretation of nature, even
fundamental evolution, is biased to the degree of worth?
It
strikes me as a quintessential need that we have to always classify things into
categories: good or bad, old or new, etc. However, there always seems to be
some sort of moral ethic mixed into these categories, as if we are placing
scientific evidence into a bourgeoise hierarchy, with humans at the pinnacle
of interest and the other species at the bottom.
This is
why I feel that there is such injustice in slaughterhouses, and why we try to
sway mass audiences in believing that animals are meant to be eaten, because we
see ourselves at the top of this evolutionary ladder. Why is it that cows are of less
importance or do not carry the same integrity as a dog? Why do some find it
appaling to eat a cat, but justifiable to eat a rabbit? The power we feel we hold
upon the rest of the animal and plant kingdom is what is truly appaling in my
opinion- we should view all animals to be placed on a same field, for we did not
just spring about from one individual factor or species.
Rather
than ladders, Gould sees that species should be viewed by phylogenies based off of
bushes, with twigs branching off in different directions. It should not stay
rigid in size or shape, as species do not evolve in this manner. By having this
model, it makes it clearer to note that species do evolve with an increasing
cone of diversity.
2b - Related: What does it mean to “replay the Tape of Life” and why is
this an interesting idea to Gould? Relate Gould’s preferred model with the
views of early Catastrophists – what would Cuvier (if alive) like and not like
about Gould’s interpretation?
I
find that one of Gould’s most striking points is his annotation towards
evolution being unpredictable. This is why the ladder system is not
scientifically accurate, as it does not question or put other factors into
perspective, making it seem that the transition from one stage to the next was
effortless. Animals that evolve with the change of time, climate, and
competition is at the core of how a species can survive, thus “survival of the
fittest” comes into play. Replaying the “Tape of Life” would alter certain
factors, but one key aspect that I think was not thoroughly looked at was
adaptation. No matter the severity of the circumstance, the animals that strive
in the wild for thousands of years have done so because of their
endurance to adapt. Without this, they cannot evolve and the species would come
to a halt.
3 - What is “disparity” versus “diversity”? Give an original example
(one not given in the reading).
Diversity
stems off from the idea of variety, an accumulation of something, wheras
disparity is the difference of two things, but can also reflect on something
that is incongruous. Diversity is also refererd to as difference in body plans.
I believe evolution is defined by factors of disparity, as it cannot be
contained and is ever evolving. We can try to predict the outcome of a species,
but are always surprised at a phenomenom or discovery of a species that was
unknown before.
An
example may be animals that are hosts of each other. This act alone is
disparate, as it normally should not exist- the fact that one depends on the
other,without causing each other harm, or being a predator, is a trait that has
evolved through time. This reminded me of the “Natural Histories project” with
the story of the hummingbird nostril hitchhikers.
4 - In the reading Evolution by Walking what is so
interesting about how the American Museum of Natural History has
changed
their mammal display? Why is it significant in how we think about biodiversity
in his opinion?
By
changing the perspective of the viewer, by having them walk through the mammal
display with branching evolution, the museum displayed a more accurate picture
of what may happen in nature. It does not follow a linear path, ending with
homo sapiens at the end of this evolution. Rather, they displayed their animals
by showing when they “branched off”. I think this reverts back to Gould’s
emphasis on the importance of viewing animals on a equal playing field, where a
hierarchy completely erases this notion. I found the subcategories to be an
innovative way to display evolution more accurately and unbiased. The
categories chosen began with the Paleozoic era, and ending with skull formation
and eye sockets near a snout, displaying elephants and sea cows.