AS.270.103 Lecture Notes - Lecture 13: Species Pool, Beta Diversity, Asymptote
23 Jan 2017
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Diversity of life in all its forms at all levels of organizations: genetic, species, ecosystem levels. Pe(cid:272)ies are (cid:271)ei(cid:374)g dis(cid:272)o(cid:448)ered a(cid:374)d goi(cid:374)g e(cid:454)ti(cid:374)(cid:272)t all the ti(cid:373)e, (cid:271)ut (cid:449)e do(cid:374)"t k(cid:374)o(cid:449) the specific rates of either uncertainty about biodiversity. One of the best documented biogeographic patterns is that in places closer to the equator, more species can be found: latitudinal gradient in species richness. Alpha diversity describes local diversity, the number of species found in a specific, relatively homogenous site. In order to count species, estimate alpha diversity through sampling. Researchers want to collect enough samples to produce a reasonable estimate of species richness while not wasting effort on any given location. October 7, 2016: the order in which the samples are collected can affect the shape of the curve, e(cid:448)e(cid:374) though the fi(cid:374)al (cid:374)u(cid:373)(cid:271)er of spe(cid:272)ies does(cid:374)"t (cid:272)ha(cid:374)ge, this variation in curve shape is produced by two things:
