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An Investigation of Root Biomass in ...

Caldwell, Benjamin Thomas.

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An Investigation of Root Biomass in Forested Ecosystems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	An Investigation of Root Biomass in Forested Ecosystems./
作者:	Caldwell, Benjamin Thomas.
面頁冊數:	99 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.
Contained By:	Dissertation Abstracts International76-02B(E).
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3640372
ISBN:	9781321258288

An Investigation of Root Biomass in Forested Ecosystems.
Caldwell, Benjamin Thomas.

An Investigation of Root Biomass in Forested Ecosystems. - 99 p.

Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.

Thesis (Ph.D.)--University of California, Berkeley, 2014.

This item must not be sold to any third party vendors.

The root systems of forest ecosystem are both important and understudied. Roots function as the critical organs of nutrient uptake and anchor tree stems against wind throw and aboveground disturbance. Roots are also an important terrestrial reservoir of carbon and play an important role in global climate. Conversion or disturbance of forest lands can result in an emission of carbon dioxide to the atmosphere, and so quantifying the amount of carbon in root biomass is of interest for forest scientists and the climate policy their research informs.

ISBN: 9781321258288Subjects--Topical Terms:

516476
Ecology.

An Investigation of Root Biomass in Forested Ecosystems.
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245 1 3 $a An Investigation of Root Biomass in Forested Ecosystems.
300 $a 99 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.
500 $a Adviser: Kevin O'Hara.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2014.
506 $a This item must not be sold to any third party vendors.
520 $a The root systems of forest ecosystem are both important and understudied. Roots function as the critical organs of nutrient uptake and anchor tree stems against wind throw and aboveground disturbance. Roots are also an important terrestrial reservoir of carbon and play an important role in global climate. Conversion or disturbance of forest lands can result in an emission of carbon dioxide to the atmosphere, and so quantifying the amount of carbon in root biomass is of interest for forest scientists and the climate policy their research informs.
520 $a This dissertation contributes to the science of root biomass measurement and modeling, providing techniques and approaches to improve those estimates, and models for leaf area that can be used to estimate root biomass. It focuses on techniques to improve measurement of root biomass using ground penetrating radar, an emergent method to measure root biomass. First, I investigate what above-ground metrics might best be used to model and predict root biomass and distribution and I develop new models relating basal area to leaf area for quaking aspen (Populus tremuloides) in the Sierra Nevada. Second, I investigate root biomass and distribution in coast redwood ( Sequoia sempervirens), and how water acquisition may drive the allocation to roots in redwoods.
520 $a Ground penetrating radar is shown to have considerable utility for the measurement of coarse root biomass. Above ground biomass is shown to be an excellent predictor of coarse root biomass in Sierran ecosystems. Leaf area, which is predicted by pipe model theory to have a tight relationship with fine root biomass, is shown to have some predictive power for root biomass, and my model represents an improvement over other reported metrics. Finally, I conclude that global root biomass estimates have not been based on reliable or unbiased data to date and I contribute A plan to correct this gap in future global estimates.
590 $a School code: 0028.
650 4 $a Ecology. $3 516476
650 4 $a Forestry. $3 895157
650 4 $a Environmental studies. $3 2122803
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710 2 $a University of California, Berkeley. $b Environmental Science, Policy, & Management. $3 1678657
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793 $a English
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