The Effect of Duckweed on Natural Pollution

As a group, we did an experiment of billbug and what kind of water they enjoy to stay. Our team was used for experiment sugar water, salt water and plain water. We measured the material we wanted to use. We used salt for 2.0 g. We used sugar for 2.0 g. and we used plain water for 10 ml. We mixed 10 ml of plain water into 2.0 g of sugar and 10ml plain water into 2.0 g of salt. We placed one tissue for each chamber. We dropped in chamber one the salt water. We dropped chamber two the sugar water. We dropped chamber three the plain water. In the middle of the chambers we placed filter paper. Then we put 5 billbugs and let them free to move anywhere they wanted. After 5 minutes we recorded how many billbugs are on each side of the chamber. We

The outcome of this lab proved for the prediction to be true. The organisms in the aquatic chamber died out and the water quality slowly deteriorated before the lab ended. Although the organisms eventually died, there was a time when the aquatic chamber was able to support life. The aquatic chamber had its own food chain where the fish ate the plant to stay alive. Furthermore, the water quality of the chamber began to deteriorate over the few weeks becoming a cloudy murky brown color.

The duckweed was found to have a very slight growth rate increase with the addition of 1 ml of salt, (confirming the statement in source 1) however when any more salt was added the duckweed showed a decline in growth rate, culminating with the

Duckweed are flowering aquatic plants which float on or just beneath the surface of still or slow-moving bodies of fresh water and wetlands (Sheh-May 2004). Botanists classify them as a separate family, Lemnaceae. These plants are simple in structure by lacking a visible stem or leaves. The larger part of each plant is a small prearranged "thallus" or "frond" structure that is only a few cells thick. These contain air pockets made of a spongey tissue called aerenchyma that allows the plant to float on top of or just beneath the surface of the water (Sculthorpe 1984). Reproduction is done primarily by asexual budding. This occurs at the base of the frond where the meristem is enclosed.

9/13: The fish was fed one flake, but he did not eat. Air bubbles appeared in the water and it had become a bit foggy. Each quadrant of the soil received about ¼ of the pipet’s water. No signs of growth has shown from the seeds. Alpha,

Due to its dense presence, the plant is capable of changing the water quality. It has the potential to alter the natural ecosystem and reduce the oxygen levels.

I definitely would have a disappointment if they died. Accordingly, every other day I fed them. Every three days, I changed their salt water ¨pool,¨ or their water tray. Moreover, when they got sand on the floor, I was

In the past weeks, we have had a few changes, first our second fish, and our second snail has died. Secondly, our plants are bent down a way. We have many more observations in our lab that It could be a few paragraphs long so, be warned.

The objective of this research is to determine whether or not Johnson’s seagrass endangerment is correlated to the amount of detrimental pollutants that humans are putting in aquatic ecosystems such as excess nitrates and oil from dredging. The critical prediction in this experiment is that as the concentration of a pollutant in the water Johnson’s seagrass grows in increases, the amount of growth decreases over time. The dry weight of the plant over time would decrease when grown in polluted water when comparing the dry weight of the plant when grown in clean water.

“Johnson's seagrass was the first and only marine plant species to be listed under the Endangered Species Act” and “also serves as a food source for endangered manatees and threatened sea turtles” (NOAA Fisheries,

No one seems to notice that the fish are dying, and no one seems to care. Not me though, I care, and I’m pretty sure I

Duckweed is a simple, small aquatic flowering plant that grows in colonies, which form dense coverings on water surfaces. They are one of the most vigorously growing plants on Earth. There are many types of duckweed, but throughout this experiment the Lemna trisulca type of duckweed was used. Each leaf of the duckweed plant is called a frond and a colony is called a Microcosm. The fronds are a vibrant, green color when they are living, but they are white when they are dead. Duckweed is an important plant because it grows rapidly in ideal conditions. It floats on water surfaces, making it easy to harvest. In addition, the tissue is soft so it can be processed simply. It could be used as a food source for animals in the future, as the

I sit still and glare into the lifeless, sodium infested dead fish bodies that have continued to float around for 10 years, or maybe even longer ‘cause let’s face it, I don’t know how long they’ve been dead. Let’s just say they can’t be any older than Sequoia trees and can’t be any younger than the movie Charlie and the Chocolate Factory.

From July 16-25, bacteria started to feed off the dead algae matter. The bacteria population skyrocketed, becoming 8x higher than it used to be on July 10 (5,000  40,000). Not only was little dissolved oxygen being made, but also the last of the oxygen was being used by the bacteria. On July 22 and 25, dissolved oxygen levels were 5.4 and 4.1 respectively. On July 28, bluegills and largemouth bass died because of the extremely low oxygen levels and high turbidity levels. Their populations were both zero. Minnows survived the incident. This is due to the fact the field guide states “[Minnows] can survive even when the water reaches high temperatures, has high turbidity, or has low

After the aquarium has been set up and the “test” fishes have survived you can begin adding more fishes. When adding new fishes you need to leave the fishes in the bag in the aquarium for about 10 minutes so that the temperature of the fish water and aquarium water can be the same and the fish can be safely added into the aquarium. After adding fishes you will need to feed twice or three times a day an amount of food that the fishes can eat in a five minute time period. You will need to check water