SOES1006 || with Error-free Solutions.

Mollusca, Arthropoda, Chordata, Echinodermata, Cnidaria, Porifera correct answers Phyla found in the rocky intertidal By size: macrofauna are larger than 1mm and meifauna are less than 1mm correct answers How do scientists define macrofauna and meiofauna? Chlorophyta (green), rhodophyta (reds), phaeophyta (browns - fucoids and kelps) correct answers The 3 different divisions of macroalgae found on rocky shores Primary producers (micro and macroalgae), grazers (limpets, periwinkles, urchins), filter feeders (barnacles, mussels, sponges), predators (crabs, whelks, oysercatchers, seastars) correct answers Major functional groups found in the rocky shore habitats It scales positively: as the limpets get larger, so do their home ranges (layer of algae covering bare rock) correct answers Describe the scaling relationship between home range area and body size in the owl limpet 30% of benthic invertebrates have direct developing larvae - adults lay eggs directly on the rocky substrate and the larvae hatch and "crawl away". The entire life cycle is completed within the rocky intertidal zone correct answers 70% of benthic invertebrates have planktonic larvae, describe the type of larvae the other 30% have Physical factors eg: desiccation stress, osmotic pressure, high air temperatures correct answers Which factors generally limit the upper distributions of rocky shore species? Biological factors eg: competition for space, predation correct answers Which factors generally limit the lower distributions of rocky shores? Moving into crevices, inhabiting rock pools, "mushrooming" in limpets, hiding under algae canopies, living in dense groups etc. correct answers Describe two ways in which a mobile invertebrate may limit he effects of either high air temperatures/ desiccation stress They have 1 dimensional and short width geographic ranges, there are only two range limits compared to terrestrial spaces that have a circular geographic range and infinite number of range limits correct answers Why the geographic ranges of rocky shore species along some coastlines are ideal biogeography Where a competitor recruits to and dominates space - for example. mussels may recruit to and dominate space in the rocky shore. Once the mussel bed is established, they will generally stay the dominant space occupier for a long time correct answers An example of pre-emptive space competition in the rocky shore