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The structure of diversity: Implica...

Neel, Maile Catherine.

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The structure of diversity: Implications for reserve design (California).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The structure of diversity: Implications for reserve design (California)./
作者:	Neel, Maile Catherine.
面頁冊數:	218 p.
附註:	Source: Dissertation Abstracts International, Volume: 61-05, Section: B, page: 2311.
Contained By:	Dissertation Abstracts International61-05B.
標題:	Biology, Botany. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9971690
ISBN:	0599765801

The structure of diversity: Implications for reserve design (California).
Neel, Maile Catherine.

The structure of diversity: Implications for reserve design (California). - 218 p.

Source: Dissertation Abstracts International, Volume: 61-05, Section: B, page: 2311.

Thesis (Ph.D.)--University of California, Riverside, 2000.

Patterns of biological diversity at three levels (vegetation community, species richness, and allozyme diversity within endemic taxa) were described and compared. Potential for conserving diversity by encompassing the geographical range of elements at each level and for simultaneously conserving multiple levels was assessed. Encompassing multiple levels of diversity in a single reserve can reduce the cost of conservation efforts. However, it is only possible if different types of diversity are structured similarly. This investigation took place in the San Bernardino Mountains of southern California (USA) where five federally-listed plant taxa are endemic to limestone and dolomite (carbonate) soils (Astragalus albens, Erigeron parishii, Eriogonum ovalifolium var. vineum, Lesquerella kingii ssp. bernardina , and Oxytheca parishii var. goodmaniana ).

ISBN: 0599765801Subjects--Topical Terms:

1017825
Biology, Botany.

The structure of diversity: Implications for reserve design (California).
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245 1 4 $a The structure of diversity: Implications for reserve design (California).
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500 $a Source: Dissertation Abstracts International, Volume: 61-05, Section: B, page: 2311.
500 $a Chair: Norman C. Ellstrand.
502 $a Thesis (Ph.D.)--University of California, Riverside, 2000.
520 $a Patterns of biological diversity at three levels (vegetation community, species richness, and allozyme diversity within endemic taxa) were described and compared. Potential for conserving diversity by encompassing the geographical range of elements at each level and for simultaneously conserving multiple levels was assessed. Encompassing multiple levels of diversity in a single reserve can reduce the cost of conservation efforts. However, it is only possible if different types of diversity are structured similarly. This investigation took place in the San Bernardino Mountains of southern California (USA) where five federally-listed plant taxa are endemic to limestone and dolomite (carbonate) soils (Astragalus albens, Erigeron parishii, Eriogonum ovalifolium var. vineum, Lesquerella kingii ssp. bernardina , and Oxytheca parishii var. goodmaniana ).
520 $a Vegetation diversity was characterized using ordination and classification on shrub, overstory, and perennial bunchgrass taxa, and 15 environmental variables in 669 0.04 hectare plots. Species richness was calculated for each plot. Allozyme diversity within four endemic taxa was assessed in a subset of the vegetation plots with at least one of the taxa. Relationships between patterns of species richness, distribution of endemic species, and measures of allozyme diversity were compared within the ordination gradients.
520 $a Eight widespread vegetation types were distributed along one gradient that was primarily related to elevation and a second gradient to percent calcium and slope angle. A total of 502 vascular plant taxa were identified with a mean of 23.5 taxa per plot. Allozyme diversity was above or comparable to values from other studies of endemic plant taxa. Maintaining the distribution of each of element of diversity appears to maintain diversity within that element. Each endemic taxon occurred in small and mostly non-overlapping portions of the CCA gradients and thus did not represent vegetation diversity. Plots occupied by at least one endemic taxon either supported fewer total taxa than the same number of plots chosen at random and species rich plots did not support most occurrences of the endemic taxa. There was no relationship between measures of allozyme diversity in taxa and either species richness, or community composition. As a result, focusing on a single level of diversity or on one endemic taxon would not conserve diversity at other levels or in other endemic taxa.
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