Distribution of all other species was restricted to the tide pools and species had their peak abundance in the zones with more moderate conditions and a higher diversity of algae, resulting in the highest chiton diversity in these areas. In both species the tide pool specimens were significantly smaller than those collected in the rocky areas. Two of the nine species ( Chiton stokesii and Acanthochitona hirundiniformis) occurred mainly on rocky areas outside the tide pools with variable amounts of exposure to air during each tidal cycle. limaciformis positively correlated to the distance from the shore. Pools higher up in the inter-tidal zone will be exposed to external conditions for longer than those further down. Hazards include waves, strong currents, exposure to midday sun and predators. Inhabitants must be able to deal with a frequently changing environment: fluctuations in water temperature, salinity, and oxygen content. What is the probability that a tidal pool contains shrimp or algae Expert Answer Who are the experts Experts are tested by Chegg as specialists in their subject area. There were 147 tidal pools that contained only algae. 125 of the pools contained shrimp and 183 contained algae. dispar and Stenoplax limaciformis) showed segregation in size: I. within rock pools are highly dependent on the amount of time for which they are isolated from the sea during low tide, whichin turn is related to their vertical location on the rock platform and their volume (Macieira & Joyeux 2011). Tide pools provide a home for hardy organisms such as sea stars, mussels and clams. A biologist has collected data from 320 tidal pools. dispar was positively correlated with the size of the inhabited boulders. Kaedra has worked to collect environmental data collection and is well-versed in aquatic data logger management. Ischnochiton dispar was the predominant species with densities of up to 200 ind m −2, representing 85.4% of all sampled individuals (N = 4193). Physical (period of emersion, temperature and salinity range) and biotic (presence and diversity of food resources) factors were examined to assess their influence on distribution and abundance of each species. Nine different species of chitons were recorded, and their densities and sizes were determined using quadrate sampling. The present study describes the species composition and vertical distribution of chitons in tide pools and on exposed rock areas of the intertidal zone of Samara, Guanacaste, Pacific Costa Rica.
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