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Isotopic Ecology of Aquatic Communit...

Maitland, Bryan M.

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Isotopic Ecology of Aquatic Communities Along the Rocky Mountains-Great Plains Ecotone.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Isotopic Ecology of Aquatic Communities Along the Rocky Mountains-Great Plains Ecotone./
作者:	Maitland, Bryan M.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	142 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-04, Section: B.
Contained By:	Dissertations Abstracts International82-04B.
標題:	Ecology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28090859
ISBN:	9798672171166

Isotopic Ecology of Aquatic Communities Along the Rocky Mountains-Great Plains Ecotone.
Maitland, Bryan M.

Isotopic Ecology of Aquatic Communities Along the Rocky Mountains-Great Plains Ecotone. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 142 p.

Source: Dissertations Abstracts International, Volume: 82-04, Section: B.

Thesis (Ph.D.)--University of Wyoming, 2020.

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

As organisms must acquire and assimilate food for growth and reproduction, trophic interactions are a fundamental driver of community structure and function. Stable isotope ratios (typically of carbon and nitrogen) provide information on the materials assimilated by organisms and can help assess food-web variation across environmental gradients. However, impediments to the application and interpretation of stable isotope data in aquatic ecology include the necessity to euthanize animals to obtain samples and unknown isotope incorporation rates and discrimination factors. In Chapter 1, I use stable isotopes to quantify variation in food-webs along longitudinal stream gradients that span the Rocky Mountain-Great Plains ecotone. I show consistent patterns of isotopic niche expansion, compression, and niche overlap in stream food-webs, suggesting general patterns of trophic diversity and redundancy in aquatic communities that are consistent with predictions from ecological theory. In Chapter 2, I show how non-lethal fin sampling can be used reliably in place of muscle tissue for obtaining stable isotope ratios in fishes by developing fin to muscle conversion models for 15 common fishes. These models support the use of non-lethal fin sampling, thus reducing the lethal take of individuals. In Chapter 3, I use a diet-shift experiment to investigate the effects of temperature on stable carbon and nitrogen isotope incorporation rates and discrimination factors in two fishes. Consistent with metabolic theory, higher temperatures accelerated growth and turnover, and affected discrimination factors, supporting the hypothesis that animals with high metabolic rates should also have high rates of isotopic incorporation.

ISBN: 9798672171166Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Aquatic invertebrates

Isotopic Ecology of Aquatic Communities Along the Rocky Mountains-Great Plains Ecotone.
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