The source is a wooden table in a community park. The reason I use the table as a sample is because part of the top surface of the table is browning. It shows comparison between browning part and the healthy part. The reason I choose it is because the brown part is begin to decay. I believe it is because the wood was attacked by mold. I think the fungi may not shows a highly growth because it exposed to the air. Once the sunlight come out, the environment will not fit the growth of fungi.
