![]() I counted the number of heartbeats within the span of a minute, and compare average heart rates between treatments. After that, I placed each individual on a Petri dish under a microscope. pulex individuals into each beaker and let them acclimatize for 24 hours. For the turbid treatments, I scooped up some mud from a storm ditch and added a few squirts to the water.ĭifferent water treatments for my D. For the eutrophic treatments, I added known concentrations of nitrate and phosphate to the water. I had 4 treatments with different water conditions: control, eutrophic, turbid, and eutrophic and turbid combination. It is a microscopic zooplankton that feeds mainly on phytoplankton, and it is an important food source for many other trophic levels, especially fish.Ī cute lil water flea! Image obtained from I did this with Daphnia pulex, a common species of water flea ubiquitous to freshwater habitats. Both of these occurences are highly problematic for the ecosystem, you can learn more about that here and here.įor my independent project, I decided to test how organisms would respond to increased nutrient concentration and turbidity in the water. Changing land use is also causing increased sedimentation as surface runoff erodes soil, carrying sediment with it and depositing it in freshwater systems. Deforestation, urban development, wastewater discharge, the list of activities that degrade water quality goes on and on.Įutrophication, which is caused by excess nutrients in the water, still happens often in lakes and rivers across the world, despite a reduction in nutrient loading since the 60s/70s. Unfortunately, these are common phenomenons nowadays due to various human activities. We have the choice of not jumping in for a swim, but the same can’t be said for the organisms that call these habitats their home. Neither of these freshwater bodies look very inviting, right? If we wouldn’t want to even dip a toe in it, I can’t imagine the animals living in there are enjoying their afternoon swim either. Or how about this waterfall? Image obtained from Love Sade, sixties soul, seventies rock, and all jazz.Does this lake speak to you? Image obtained from Worked as a commercial photographer at JL Hudsons in Detroit and continue photography as a hobby. Major hobbies are collecting old stuff from the 20s and restoring old racing bicycles. You felt like you were growing up when you got your first pair of real gloves to replace the awful mittens your mom would make you wear.įredric Durrette served one tour in Vietnam, retired as E8 in the navy submarine service after 23 years. ![]() ![]() We built snowmen in the yard and had snowball fights. In the winter, mom made ice cream from the snow and we played outside until our fingers were numb. We went to the movies in groups, sometimes with as many as seven or eight, it made the scary movies more fun and you had someone to walk home with when it got dark. Kids would crowd around a patrol car when it came into the neighborhood. Neighbors watched out for us and if ole lady Byers down the street caught me doing something improper, she’d grab me by the ear and drag me home where my mom would make me get my own switch. Our parents always seemed to know what we were doing without even looking. We played in the streets until dark when the street lights came on, then, we could play around the house until bed time. Usually, when the fight was over, it meant a trip to the candy store together or just sharing another candy bar. And you NEVER kicked someone when they were down. If you knocked your opponent down, you reached out your hand to help him back up. You never used a weapon, that was cowardly. However, even fighting had it’s own code. However, if he disgraced your mother, it meant a fight. We played the dozens with each other, a game where you’d talk down your buddy. If a friend was at your house at dinner time, you always invited them to dinner. You never cursed or used profanity on Sundays, you shared your candy with your friends even if it meant only getting a tiny piece of the Babe Ruth bar you just bought. Pity the unfortunate neighbor who had planted watermelons. We never stole anything, but a neighbors cherry or peach tree was open season. We did fun things like exploring empty lots, laying in the grass making animals out of passing clouds, catching insects, playing cowboys and Indians, building rocket ships, making rubber band guns from clothes pins, and prowling allies for discarded “hidden treasures”. Growing up in a poor neighborhood in Detroit in the early fifties, our neighborhood gang was composed of Black kids as well as the kids of European immigrants and there was even the girl next door that hung out with us for a while.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |