I had the good fortune to spend three days in the field, last week, with a wildlife biologist and her field crew, in their study area in the Southern Canadian Rockies, observing and helping the team “pull transects,” inventory tree growth, and track for wolf and other predator sign. They were compiling data for evidence of “trophic cascades,” in the ecosystems at the mountain-prairie interface. Trophic cascades are the energy that ripples out from the presence of a top predator, or a “keystone species,” in an ecosystem—not necessarily through direct predation so much as through an “ecology of fear,” which keeps herbivores vigilant and on the move, balancing browsing with scanning for predators. Removal of the predator can result in a collapse of the number and complexity of the energy cascades; presence of a predator amplifies and expands the energy ripples. Through such “cascade” effects, we ultimately might establish links between, say, wolf presence and songbird diversity. (For some ecosystems, a “mesopredator” like the coyote fulfills the function of the wolf.) Or so the theory goes.
Theoretical or not, I like to call it the wolf-songbird complex.
Another borrowed book whose call I ignored for too long is María Meléndez’s How Long She’ll Last in This World (U of Arizona, 2006). And how helpless I became, in its pages. I cannot resist poetry that speaks to me of “the morning sparkle of cows’/ dewy slobber all over the pasture,” or of dropping “a Troxler down a vertically sunk/ PVC pipe, [measuring] soil moisture as shifts/ in the tool’s resonant frequency.” On one level, this is poetry for the pack, inspirational to field science, informative to poets. (Meléndez writes out of her work as a wildlife biology field assistant.) The phenomena referenced quicken to shared contact, to the cast of a certain landscape, a “co-pathy/ with this particular coastal prairie herd,/ because we’ve been under the same saffron spell/ of a hill of bush lupine in bloom.” Meléndez’s poetry speaks the “co-pathy” of landscapes west of the Divide, Carolinas too.