Study Site. The sampling was conducted at an isolated limestone hill, Mount Silabur, Serian, Sarawak, Malaysian Borneo (00°57.407’N, 110°30.276’E). Mount Silabur is approximately 350 metres high and measures roughly 500 by 300 metres. The cave entrance is about 150 metres from the foot of the hill. The cave itself consists of a main chamber connecting the opposite sides of the hill. There are multiple high ▇▇▇▇▇▇▇▇ (▇▇▇▇▇▇▇, 1964) that we excluded from our sampling for safety reasons. Our first fieldwork was on the 3rd of March 2017, when random sampling was carried out at two locations at the limestone outcrops and one location in the cave. The second sampling took place on the 16th of April 2017, when we conducted systematic sampling and sketched a map of the cave system in which we also indicated the location of the plots (Figure 4.1). Populations of hydrocenids were collected at 19 different plots surrounding the outcrops and inside of the cave.
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Sources: Doctoral Thesis, Publisher's Version, Doctoral Thesis