Author: Eduardo Sahagun Godinez
Publisher:
ISBN:
Category :
Languages : en
Pages : 262

View

Book Description

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 492

View

Book Description
"Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Author: Rosa Maria Ceron Breton
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 0

View

Book Description
The objective of this study was to assess the spatial and temporal distribution of nitrogen and sulfur deposition and its relationship with meteorological conditions in the metropolitan area of Le√≥n in Guanajuato, M√©xico. N and S atmospheric deposition was collected using passive samplers (IER) in 10 sites in Le√≥n City during three climatic seasons in 2018. Nitrate, ammonium, and sulfate concentrations and deposition fluxes of N and S were determined. From wind and air-mass trajectories analysis, mechanisms and possible sources contributing to N and S deposition in the study area were assessed. Atmospheric deposition fluxes were compared to critical load values reported for sensitive ecosystems in Europe. It was found that mean deposition flux for N (5.82 Kg N ha,àí1 year,àí1) was within the range of values reported for sensitive ecosystems in Nuevo M√©xico, Europe, and California. On the other hand, the mean deposition flux for S (13.77 S Kg ha,àí1 year,àí1) exceeded the critical load values proposed for Europe, suggesting that current S deposition could be a risk for ecosystems and water bodies in the region.

Author: David H. Benzing
Publisher: Cambridge University Press
ISBN: 9780521048958
Category : Medical
Languages : en
Pages : 380

View

Book Description
This synthesis of the growing body of information from research on epiphytes and their relations with other tropical biota provides a comprehensive overview of basic functions, life history, evolution, and the place of epiphytes in complex tropical communities. Epiphytes comprise more than one-third of the tropical vascular flora in some tropical forests. Growing within tropical forest canopies, epiphytes are subject to severe environmental constraints, and their diverse adaptations make them a rich resource for studies of water balance, nutrition, reproduction and evolution.

Author: David H. Benzing
Publisher: Cambridge University Press
ISBN: 9780521430319
Category : Science
Languages : en
Pages : 374

View

Book Description
This book covers bromeliad biology, rather than cultivation.

Author: Cerón-Bretón Rosa MaríaCerón-Bretón
Publisher:
ISBN:
Category : Technology
Languages : en
Pages :

View

Book Description
Evaluation of Dry Atmospheric Deposition in Two Sites in the Vicinity of Fuel Oil-Fired Power Plants in Mexico.

Author: Sara Oldfield
Publisher: World Conservation Union
ISBN: 9782831703909
Category : Nature
Languages : en
Pages : 214

View

Book Description
Found in a variety of forms, cacti and other succulents have elicited widespread interest and tremendous popularity worldwide. Although the subject of a certain amount of debate, about 10,000 species are recognized as belonging to the succulent group. Of these, an estimated 2,000 are threatened with global extinction in the wild and many more are regionally or nationally threatened mainly due to habitat destruction and collection for international trade.This Action Plan brings together from around the world current information on population status, threats and conservation of this particularly important group of plants. Prepared with conservationists, scientists, governments, protected area managers and grant-awarding bodies in mind, it suggests priorities for action and encourages collaboration among interested parties at all levels.

Author: Gerhard Zotz
Publisher: Springer
ISBN: 3319392379
Category : Science
Languages : en
Pages : 292

View

Book Description
This book critically reviews advances in our understanding of the biology of vascular epiphytes since Andreas Schimper’s 1888 seminal work. It addresses all aspects of their biology, from anatomy and physiology to ecology and evolution, in the context of general biological principles. By comparing epiphytes with non-epiphytes throughout, it offers a valuable resource for researchers in plant sciences and related disciplines. A particular strength is the identification of research areas that have not received the attention they deserve, with conservation being a case in point. Scientists have tended to study pristine systems, but global developments call for information on epiphytes in human-disturbed systems and the response of epiphytes to global climate change.

Author: Ulrich Lüttge
Publisher: Springer Science & Business Media
ISBN: 3662033402
Category : Science
Languages : en
Pages : 393

View

Book Description
This richly illustrated text covers the ecophysiology of plants of all major tropical ecosystems, from tropical rain forests, epiphytic habitats, mangroves and savannas to salinas, inselbergs and paramos and their ecophysiological adaptation to these different tropical environments. The physiognomy of biotopes and characteristic life forms of plants are depicted with photographs.

Author: Bruce Braun
Publisher: U of Minnesota Press
ISBN: 1452904375
Category : Human ecology
Languages : en
Pages : 365

View

Book Description
Braun (geography, U. of Minnesota) provides a new viewpoint on the complex cultural, political, and intellectual forces involved in the forest policies of British Columbia. Employing poststructuralist theory and using the 1993 protests over logging in Clayoquot Sound as his starting point, Braun assesses the colonial thinking behind 19th- century forest policies, the struggles of native peoples to regain their spaces, the assertion of so-called rational forest management as a new version of colonialism, the Western Canada Wilderness Committee's use of nature photography to promote their notion of pristine wilderness, ecotourism, and the continued impact of the vision of early 20th-century painter Emily Carr. Annotation c. Book News, Inc., Portland, OR (booknews.com)