Anthopleura Elegantissima Essay Research Paper Emily PorterfieldEnglish — страница 2

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was to discover if the anemones would create anemone-free zones in-between clonal groups if there are no other species of animals and no waves. In this experiment the anemones were collected from two different clones but they were not side-by-side. Francis also kept them in the laboratory for an extended period of time (up to a year). A baking dish was lined with foam plastic and on one side, one clone of anemones was attached with insect pins and the other clone was attached to the other side. Microscope slides were lined up and taped together to prevent any contact between the two clones. Sea water was running into one side of the dish. The flow of the water was changed periodically because the anemones are inclined to move upstream and Francis didn?t want the flow of the water

to affect her experiment. The insect pins and the microscope slides were removed. Pictures were taken once a day to determine how much the anemones were moving each day. Within three weeks an anemone-free zone was formed between the two clonal groups. During this time Francis also observes some aggressive behavior. After this experiment, Francis concluded that anemone-free zones can be formed by the anemones without the presence of other organisms. When contemplating why anemones might live in clusters instead of individually Francis had three main points. Living in clusters: lessens water loss and damage from the waves, makes it harder for other ocean life to settle and compete, and it is easier to procure and hold large animals. Also, the patterns that Francis observed in these

anemones are not unique to this species. Some of these same patterns occur in other species of organisms. Other scientists have observed other organisms living very close together with no tissue fusion. Others have also observed ?complete fusion at the interface between separate growing edges of the same colony both in the encrusting ascidian Botrylus and in a variety of bryozoa? (407). These phenomena are corresponding because of the ?contrast between the intimacy of association among genetically identical ?individuals? in colonies or clonal groups, and the relative isolation between genetically different individuals of the same species? (407). Marine Biology is the study of the origin, history, characteristics, and habits of plants and animals. Marine Biologists usually

specialize in one taxon and study one specific organism. Francis?s article relates to the discipline of Marine Biology because her article focuses on the specific sea anemone Anthopleura elegantissima. In her article, Francis commences with details in her materials and methods section. This implies that this is a very significant section. She also incorporates charts into her procedures and results section, which helps to prove that her research is legitimate and helps us to understand the experiment more thoroughly. Francis incorporates the procedures section in with the results section which is not done frequently in a biological report. In the last section of the first part of Francis?s procedures and results section she includes some interpretation, which seems to indicate

some difficulty with organization. She states that ?No other hypothesis can simply explain…?(403). Francis didn?t include these interpretations in all of her sections, only in this one and in her discussion section, where it really belongs. Also, in her fourth section she includes extra, unnecessary material. She states, ?During this time numerous aggressive episodes were observed at the border between the two groups?(406). She goes on to say that she did not notice this in the preceding experiment, which was done before this one. Her inclusion of ?similar phenomena?(407) indicates that it is important to relate other organisms to the ones being observed. Francis?s article was very comprehensive although she seems to have difficulty staying focused and organized.