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Ecological Effects of Climate Change...

Rollins, Hilary B.

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Ecological Effects of Climate Change on Amphibians.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Ecological Effects of Climate Change on Amphibians./
作者:	Rollins, Hilary B.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
面頁冊數:	114 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-02, Section: B.
Contained By:	Dissertations Abstracts International82-02B.
標題:	Ecology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28078499
ISBN:	9798662453746

Ecological Effects of Climate Change on Amphibians.
Rollins, Hilary B.

Ecological Effects of Climate Change on Amphibians. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 114 p.

Source: Dissertations Abstracts International, Volume: 82-02, Section: B.

Thesis (Ph.D.)--Case Western Reserve University, 2019.

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

With climate change, global average temperatures are increasing and becoming more variable. As a result, reproductive phenology is shifting earlier, body size is decreasing in ectotherms, and snow cover is decreasing. I examined how these effects of climate change affected amphibians and their ecological interactions across life stages. In Chapter 1, I investigated whether an early shift in phenology could alter subsequent life history events, if the organisms were able to compensate, and if compensation was costly. Despite a seven day difference in hatch date, frogs from the delayed egg phenology treatment accelerated growth and development to metamorphose at the same time as the early egg phenology treatment. Frogs that accelerated development metamorphosed at the same size as frogs that did not accelerate development but had the same food availability, indicating that there was no size cost of compensation. In Chapter 2, to understand how climate change-induced shifts in phenotype could affect important interspecific interactions, I examined how a shift in wood frog larval phenology, and body size altered post-metamorphic competition with American toads. The interaction of wood frog metamorphic size and phenology affected toad body condition such that wood frogs that metamorphosed earlier and smaller, as expected under climate change, led to toads with higher body condition.Finally, in Chapter 3, I tested whether the effects of climate change on wood frogs were altered by early ecological interactions. I examined how predation during larval development affected how wood frogs would tolerate a reduced snow cover winter. Exposure to predators during larval development increased mass at metamorphosis, time to metamorphosis, and larval growth rate. Snow removal increased frog mortality. The interaction of larval exposure to predators and reduced snow cover caused a steeper relationship between mass and body length in animals that experienced both.I found that the ecological effects of climate change shifted larval development and juvenile growth, reduced the ability to compete against interspecific competitors, increased winter mortality, and altered spring body condition. These effects may scale up to affect population dynamics and fitness, and demonstrate the importance of considering ecological effects of climate change.

ISBN: 9798662453746Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Phenology

Ecological Effects of Climate Change on Amphibians.
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