interesting observations for those into the science of things
for ~science~ reasons, i made an ecosphere from each body of water on my family's property- one is a creek, one an approx. 40x30ft pond that has little to no shade (pond 1), and one pond of a similar size that is high shade (pond 2). all 3 are very well established and natural bodies of water, and are relatively near each other. what interested me is i haven't found a single snail/mollusk or planarian in pond 2, and a significant population of biting midge larvae.
in pond 1, my sample consisted of non biting midge larvae, and had a significant amt of pea clams, pond snails, bladder snails, and planaria.
i have heard tales of the universality of scuds, but haven't spotted one out of the 3 water sources.
from the creek came only snails and caddisflies.
why is pond 1 so popular with the macros? most of these creatures prefer shade as i understand it. does the high shade of pond 2 make it lower oxygen? or is this just a coincidence?