Trophic Responses to Juvenile Sockeye Salmon Stocking and Nutrient Enrichment in Barren Little Waterfall Lake PDF Download
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Author: Jim A. Edmundson
Publisher:
ISBN:
Category : Fish stocking
Languages : en
Pages : 33
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Book Description
Author: Jim A. Edmundson
Publisher:
ISBN:
Category : Fish stocking
Languages : en
Pages : 33
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Book Description
Author: Jim A. Edmundson
Publisher:
ISBN:
Category : Esther Passage Lake (Alaska)
Languages : en
Pages : 28
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Book Description
Author: Brenda Joyce Rogers
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 224
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Book Description
Author: Michelle Catherine Nelson
Publisher:
ISBN:
Category :
Languages : en
Pages : 104
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Book Description
The movement of nutrients across ecosystem boundaries can affect recipient ecosystems at individual, population, and community levels. This is particularly the case when more productive systems subsidize less productive ones, where subsidies can sustain and enhance populations in nutrient-poor recipient environments. One prominent example of this is the annual migration of salmon from the marine environment into low-productivity freshwater streams for spawning. This thesis uses data collected from 47 near-pristine streams on the central coast of British Columbia to study spawning chum (Oncorhynchus keta) and pink (O. gorbuscha) salmon and the ecological implications of their nutrient subsidy, focusing on stream-rearing juvenile coho salmon (O. kisutch). While considering a broad suite of habitat characteristics, the strongest predictors of juvenile coho size and abundance were spawning chum and pink salmon abundance. Streams with more spawning chum salmon had larger coho, while streams with more spawning pink salmon had higher coho populations. Further, the evidence suggested the negative association between juvenile coho and their intraguild predators/competitors, sculpin (Cottus aleuticus and C. asper), may be reduced as more spawning salmon nutrients became available. Altogether, this thesis shows strong impacts of marine-derived nutrient subsidies to freshwater ecosystems at multiple ecological scales. In general, it provides insights into the ecological mechanisms by which species interact with their environments, the potential for nutrient subsidies to affect recipient populations through changing food supply and predator-prey dynamics, and the role of multi-trophic interactions in subsidized trophic cascades. In specific, this research improves our understanding of the potential positive feedback between different species of salmon while incorporating the importance of multiple habitat characteristics. This has the potential to inform conservation and ecosystem-based management, particularly in light of the drastic decline in spawning salmon abundance in northern Pacific regions.
Author:
Publisher: National Technical Info Svc
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 648
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Book Description
This document is a cooperative effort among fifteen Federal agencies and partners to produce a common reference on stream corridor restoration. It responds to a growing national and international interest in restoring stream corridors.
Author: Nigel Haggan
Publisher: United Nations Educational, Scientific & Cultural Organization
ISBN:
Category : Social Science
Languages : en
Pages : 444
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Book Description
Drawing on a number of case studies from around the world, this publication considers how the local knowledge and practices of indigenous fishing communities are being used in collaboration with scientists, government managers and non-governmental organisations to establish effective frameworks for sustainable fisheries science and management. It seeks to contribute towards achieving the goal of establishing international responsibility for the ethical collection, preservation, dissemination and application of fishers' knowledge.
Author: Rodney V. Salm
Publisher: IUCN
ISBN: 9782831705408
Category : Business & Economics
Languages : en
Pages : 406
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Book Description
This is a new edition of the classic textbook on marine protected area (MPA) management in the tropics, originally produced as an output of the Bali World Parks Congress in 1982. Approaches to planning and managing MPAs have evolved considerably. Major advances include innovative financing mechanisms, partnerships with the private sector and NGOs, and collaborative management between government and coastal communities. These advances have brought new approaches for MPA establishment and management that are more participatory, involving communities through interaction and collaboration rather than prescription. With new case studies and illustrations, the guide comes in a water-resistant cover for field use. It is intended for those who plan individual and/or national MPA systems and gives philosophical context for MPAs along with some basic principles and approaches.
Author: John Koehn
Publisher:
ISBN: 9780642732019
Category : Carp
Languages : en
Pages : 249
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Book Description
Provides a comprehensive view of the history of carp in Australia, their biology, the damage they cause and community attitudes to these problems and their solutions. Key strategies for successful carp management are recommended and illustrated by case studies.
Author: Jordi Catalan
Publisher: Springer
ISBN: 3319559826
Category : Nature
Languages : en
Pages : 413
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Book Description
This book provides case studies and general views of the main processes involved in the ecosystem shifts occurring in the high mountains and analyses the implications for nature conservation. Case studies from the Pyrenees are preponderant, with a comprehensive set of mountain ranges surrounded by highly populated lowland areas also being considered. The introductory and closing chapters will summarise the main challenges that nature conservation may face in mountain areas under the environmental shifting conditions. Further chapters put forward approaches from environmental geography, functional ecology, biogeography, and paleoenvironmental reconstructions. Organisms from microbes to large carnivores, and ecosystems from lakes to forest will be considered. This interdisciplinary book will appeal to researchers in mountain ecosystems, students and nature professionals. This book is open access under a CC BY license.
Author: Sue Wells
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 696
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Book Description
