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Evaluating past and present plant di...

Harris, AJ.

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Evaluating past and present plant distributions using biodiversity informatics.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Evaluating past and present plant distributions using biodiversity informatics./
Author:	Harris, AJ.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
Description:	238 p.
Notes:	Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
Contained By:	Dissertation Abstracts International78-05B(E).
Subject:	Botany. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10187853
ISBN:	9781369355901

Evaluating past and present plant distributions using biodiversity informatics.
Harris, AJ.

Evaluating past and present plant distributions using biodiversity informatics. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 238 p.

Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.

Thesis (Ph.D.)--Oklahoma State University, 2015.

I have completed a study in two primary parts that sought to apply big data methods to the problems of understanding plant distributions. In the first part, I tested and applied taxon-based modeling for inferring species richness and climate. Taxon-based modeling uses information about the known occurrences and climates of a set of taxa to make inferences about where other such taxa could occur or about the climates experienced in places where those taxa do occur. In my dissertation, I applied two types of taxon-based methods; namely, stacked ecological niche models and taxonomic calibrations. The first part of dissertation research consisted of three main objectives which were to (1) measure the accuracy of stacked ecological niche models as predictors of species richness for Cactaceae and Pinaceae in differently sized geographic areas, (2) determine whether taxonomic calibrations performed using higher ranks than species could yield biologically meaningful climatic predictions for United States counties, and (3) estimate the paleoclimate experienced by Aesculus L. during the Eocene using stacked ecological niche models and taxonomic lists from the paleofloras in which the genus occurred. My primary findings were that ecological niche models did not accurately infer species richness, that the taxonomic ranks of genus and family, but not order, yield reasonable climatic predictions in many cases, and that Aesculus experienced a temperate climate during the Eocene. In the second part of my dissertation research, I evaluated the latitudinal richness gradient of vascular plant genera in the Eocene and Oligocene of North America north of Mexico using data from macrofossils. I found that the latitudinal richness gradient during the epochs was hump-shaped, and richness peaked at higher latitudes within the temperate zone compared to the present day. Both parts of my study provide new insights into the methods and applications of big data to understanding plant distributions in the past and present.

ISBN: 9781369355901Subjects--Topical Terms:

516217
Botany.

Evaluating past and present plant distributions using biodiversity informatics.
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500 $a Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
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