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Climate Sensitivity of Lentic Mounta...

Farruggia, Mary Jade,

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Climate Sensitivity of Lentic Mountain Ecosystems /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Climate Sensitivity of Lentic Mountain Ecosystems // Mary Jade Farruggia.
作者:	Farruggia, Mary Jade,
面頁冊數:	1 electronic resource (156 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
Contained By:	Dissertations Abstracts International86-04B.
標題:	Ecology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31561369
ISBN:	9798384486053

Climate Sensitivity of Lentic Mountain Ecosystems /
Farruggia, Mary Jade,

Climate Sensitivity of Lentic Mountain Ecosystems /Mary Jade Farruggia. - 1 electronic resource (156 pages)

Source: Dissertations Abstracts International, Volume: 86-04, Section: B.

Lentic freshwater ecosystems are threatened by unprecedented global change. Often considered sentinels for change, lentic ecosystems like lakes and ponds are particularly sensitive and vulnerable to the effects of global change because they respond rapidly to changes in the environment and integrate information from their surrounding catchment within their ecosystem. These sensitive lentic ecosystems are increasingly threatened by climate-driven shifts like warming air temperatures, increasing hydroclimatic variability, and changing ice phenologies. Additionally, global-change phenomena such as increasingly extreme wildfire activity further threaten these ecosystems. In particular, mountain lentic ecosystems are experiencing some of the world's greatest rates of change in air temperature and precipitation regimes, respond strongly to climate forcing, and may be particularly sensitive to global change. In this dissertation, I investigated the climate sensitivity of lentic ecosystems in three primary ways. First, we quantified lake exposure to wildfire smoke across North America, and reviewed the known and theoretical impacts of that exposure. Then, we investigated how wildfire smoke affects lake and pond temperature and ecosystem metabolism across a watershed. Finally, we addressed the impact of hydroclimatic variability on lake zooplankton assemblage, abundance, and diversity. We found that the physical, biological, and chemical processes in lakes likely all respond to wildfire smoke exposure, and that in small, oligotrophic mountain lakes and ponds, smoke reduces water temperatures and ecosystem metabolism. These studies highlight that as wildfires increase in frequency and intensity, smoke from those fires have the potential to impact lentic ecosystem processes from local to continental scales. We also found that while much of the research on climate impacts focuses on the effects of warming, climate change-driven extremes in hydroclimate significantly determines lake zooplankton community abundance, biomass, and diversity. With increasingly extreme variability in hydroclimate, mountain lake zooplankton communities may undergo major shifts in assemblage and abundance. As we face increasing challenges driven by both climate change and human behavior, lakes and ponds can serve as key indicators of change in an ever-changing world.

English

ISBN: 9798384486053Subjects--Topical Terms:

516476
Ecology.
Subjects--Index Terms:

Ecosystem metabolism

Climate Sensitivity of Lentic Mountain Ecosystems /
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