Abstract Title

Session S-09E: Marine, Freshwater and Terrestrial Species: Threats and Conservation

Keywords

Species and Food Webs

Location

Room 613-614

Start Date

2-5-2014 10:30 AM

End Date

2-5-2014 12:00 PM

Description

Oak galls are formed when a female gall wasp lays her eggs on the host plant. She then injects the host plant with a toxin that makes the plant form a tumor around her eggs, protecting them. Oak galls and lichen both use the same nutrients, resulting in competition for nutrition and space on a tree. Our data was collected at the Glacial Heritage Preserve in Thurston County, Washington. The purpose of this paper is to study the relationship between oak gall placement and the presence of lichen on twigs. We measured the diameter of an oak gall and then measured the distance between the oak gall and lichen growth. There is an extremely strong positive correlation (R-square of 0.7994) between oak gall size and the distance the lichen grows from the gall. The relationship is apparent when the oak gall is very large because then there was little to no lichen. There also seems to be a relationship between the age of the twig and the placement of the gall on it.

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May 2nd, 10:30 AM May 2nd, 12:00 PM

The Relationship of Oak Gall Size to Lichen Proximity on Quercus garryana

Room 613-614

Oak galls are formed when a female gall wasp lays her eggs on the host plant. She then injects the host plant with a toxin that makes the plant form a tumor around her eggs, protecting them. Oak galls and lichen both use the same nutrients, resulting in competition for nutrition and space on a tree. Our data was collected at the Glacial Heritage Preserve in Thurston County, Washington. The purpose of this paper is to study the relationship between oak gall placement and the presence of lichen on twigs. We measured the diameter of an oak gall and then measured the distance between the oak gall and lichen growth. There is an extremely strong positive correlation (R-square of 0.7994) between oak gall size and the distance the lichen grows from the gall. The relationship is apparent when the oak gall is very large because then there was little to no lichen. There also seems to be a relationship between the age of the twig and the placement of the gall on it.