Author: Mark David Scheuerell
Publisher:
ISBN:
Category : Lake animals
Languages : en
Pages : 318

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Book Description

Author: Paul D. Henne
Publisher:
ISBN: 9780542988684
Category :
Languages : en
Pages : 242

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Book Description
Recent declines in the amount and duration of snow in the Northern Hemisphere are anticipated to continue as a result of greenhouse warming. The consequences of such changes for northern forests are uncertain. The Great Lakes region offers a unique setting to examine spatial and temporal variability in snowfall abundance and the impact of such variability on vegetational distributions. Lake-effect snowfall produces a threefold gradient (100--300 cm) in this region. I compared the importance of lake-effect snow relative to a suite of environmental factors as a predictor mesic-species abundance using a geographic information system and predictive modeling. Lake-effect snow, not soil texture, is the dominant control of regional mesic-forest distribution on the modern landscape. Mesic species dominate on all landform types (e.g. till, outwash) inside the lake-effect snowbelt, whereas they are restricted to fine-textured landforms outside the snowbelt. I also determined when lake-effect snowbelts developed during the Holocene by comparing oxygen-isotope data from one snowbelt and one non-snowbelt lake. These sites share similar climatic histories during the early Holocene. However, between 8500 and 5500 cal yr B.P., increasing lake-effect snow caused 18O-depletion at the snowbelt lake relative to the non-snowbelt lake, with the largest changes occurring after 6900 cal yr B.P. These differences lessened after 5500 cal yr B.P. but the snowbelt site continued to receive more snowfall. I integrated these isotopic data with pollen analysis from two snowbelt and two non-snowbelt lakes. One lake in each snowfall regime is situated on till and the other on outwash. Vegetational change was synchronous among these sites during the early Holocene prior to snowbelt development. A shift to mesic-hardwood forests after 5500 cal yr B.P. occurred only at the snowbelt sites. Snowfall variability was a more important constraint on vegetational change than edaphic variation.

Author: Jill Crossman
Publisher: Springer Nature
ISBN: 3030578747
Category : Science
Languages : en
Pages : 268

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Book Description
This book reviews the globally important freshwater resource of the Great Lakes, which is currently threatened by contaminants that compromise water quality and impact its ecological and economic health. Divided into four parts, this volume covers historic, current and emerging sources of contamination from heavy metals and persistent organic pollutants to microplastics; and identifies their ecological impacts. Due to factors ranging from rapidly changing land use practices, climate change and our emerging understanding of their impact on biological, chemical and physical interactions, the effectiveness of management strategies has proven highly variable. Continued enhancements in the rate of lake recovery are required to sustain the health of the Great Lakes. Accordingly, the book also explores recent advances in contaminant detection, along with future steps forward in lake management approaches. Revealing our current knowledge gaps and providing a roadmap towards sustainable solutions, the book offers a valuable asset for scientists, managers and the public alike.

Author: Anthony Carmen Yannarell
Publisher:
ISBN:
Category :
Languages : en
Pages : 180

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Book Description

Author: Xiao Ouyang
Publisher: Frontiers Media SA
ISBN: 2832544541
Category : Science
Languages : en
Pages : 190

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Book Description
The evolution of land space demonstrates the shift of land use types from natural and semi-natural land (e.g., forest land and cropland) to built-up land, altering ecosystem cycling patterns and leading to degradation of ecosystem services in terms of regulation, provisioning and support. At the same time, production and living space crowding out ecological space brings high potential threats, such as soil erosion, forest productivity decline and habitat fragmentation. Accordingly, in response to the problems of imbalanced territorial space development, inefficient resource utilization and ecological environment degradation, how to improve the diversity, stability and sustainability of ecosystems is an urgent issue to promote modernization and green development in the new era of territorial space evolution.

Author: K.P. FINLAY
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Pedro Giovâni Da Silva
Publisher: Frontiers Media SA
ISBN: 2889667804
Category : Science
Languages : en
Pages : 143

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Book Description

Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 776

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Book Description

Author: John J. Magnuson
Publisher: Oxford University Press, USA
ISBN: 9780195136906
Category : Nature
Languages : en
Pages : 426

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Book Description
"Two whole lake experiments are describes : experimental acidification at Little Rock Lake and the response of Lake Mendota to a natural experiment involving agricultural and urban development. Readers will learn the benefits of doing long-term ecological research, and limnologists will discover the richness of new information derived from studying suites of neighboring lakes across time."--BOOK JACKET.

Author: H. John B. Birks
Publisher: Springer Science & Business Media
ISBN: 9400727453
Category : Science
Languages : en
Pages : 751

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Book Description
Numerical and statistical methods have rapidly become part of a palaeolimnologist’s tool-kit. They are used to explore and summarise complex data, reconstruct past environmental variables from fossil assemblages, and test competing hypotheses about the causes of observed changes in lake biota through history. This book brings together a wide array of numerical and statistical techniques currently available for use in palaeolimnology and other branches of palaeoecology. ​ Visit http://extras.springer.com the Springer's Extras website to view data-sets, figures, software, and R scripts used or mentioned in this book.